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AlexSSS
2012-04-13, 02:27 PM
A Diversity Reception Scheme for TETRA Multi-carrier System

Abstract—A maximal ratio combination(MRC) diversity
reception scheme for TETRA multi-carrier system is present.
TETRA enhance data service(TEDS) standard adopts Filter-
Bank Multi-Carrier Modulation(FBMCM) and QAM schemes
in order to improve the transmission rate. Space diversity is
considered as an efficient way to reduce the impact of fading.
TEDS specifies its own preamble for timing synchronization,
frequency offset estimation and channel equalizer. In this
paper, a MRC diversity reception scheme which makes use of
the special preamble is proposed. Simulation result shows that
the proposed schemes exhibit good performances in the
channel model defined in TETRA.

no pass

Please Add Repluation, Thanks!

AlexSSS
2012-04-13, 02:30 PM
Traffic Performance Evaluation of Data Links in TETRA and TETRAPOL

Abstract
TETRA and TETRAPOL are competitors in the market of Professional Mobile Radio (PMR). In a previous
study [1] we compared the trunked mobile radio systems TETRA V + D and TETRAPOL by evaluating random
access performance. Here we present a comparison of the TETRA and TETRAPOL error correction schemes
involved to secure LLC data links. The traffic performance of both systems was compared for ETSI scenario
8 [2]. Realistic models for the effects of propagation circumstances and co-channel interference are taken into
account. The results of the traffic performance measurements exhibit differences in connection set-up times
and transmission delays for data links in TETRA and TETRAPOL systems in favour of the TETRA system
and reveal a strong dependency on random access delays

AlexSSS
2012-04-13, 02:33 PM
Research on the Assignment Mechanism of TETRA Event Labels

Abstract— An event label is temporary shortened form of address
defined in TETRA specifications, and it can save more bits in the
air interface, compared to a Short Subscriber Identity (SSI).
Because there is quite limited literature related to event labels,
event labels are not supported in most TETRA systems yet. A
novel assignment mechanism, including the data structure and a
detailed SDL state chart, is presented in this paper. This paper
introduces the basic concept of event labels and evaluates the
impact of event labels in four most common used TETRA
services: voice call setup, short data service, group
attachment/detachment and packet data service. Simulation
results show event labels will improve the performance of short
data services, group attachment/ detachment and packet data
services.

AlexSSS
2012-04-15, 04:40 PM
Connectivity and Coverage in Finite TETRA System

Abstract—In finite TETRA system, base stations can be formed
in wireless muti-hop fashion. This paper investigates two
fundamental characteristics of a wireless base station network:
its connectivity and its maximum coverage area. First, by
analyzing the isolated node, we obtain the relationships
between the number of nodes, transmission range and network
connectedness. Based on the results of connectivity, we
calculate the minimum number of frequencies of each base
station should maintain. Furthermore, we propose a theorem
to determine the topology of a connected network achieving the
maximum coverage area.

AlexSSS
2012-04-15, 04:44 PM
Characterization of Impedance Variations in
antennas for TETRA terminals

Abstract—Antenna input impedance is usually considered as
a non-dynamical magnitude, which remains constant during the
transmission or reception process. The main advantage is that
it allows to simplify matching circuit design. However, in an
actual situation, the impedance value is a dynamic quantity
that can be very different compared to the static value. In this
paper, we propose a histogram based method in order to identify
the impedance variation of TETRA antennas. The statistical
approach is carried out in the matching domain rather than in the
impedance domain, because in this way the random vector has
a compact support. The method is applied to model a practical
situation where the terminal position changes from the user’s
pocket to the head, obtaining a bimodal distribution which cannot
be identified directly by means of parametric methods. We prove
experimentally that the dynamical values are different from the
results obtained in an anechoic chamber, and it is required to
perform a cluster analysis or a non parametric method to identify
accuratelly the probability density function which characterizes
the antenna impedance.

AlexSSS
2012-04-15, 04:46 PM
Performance Evaluation of Phase Modulation
Schemes for TETRA Application

Abstract—Phase Modulation schemes have been extensively
used in mobile systems. TETRA -1 supports π/4-DQPSK,
where as TEDS supports π/8-D8PSK along with QAM
schemes in order to achieve higher data rate. In this paper
the performance of phase modulation schemes over TETRA
propagation models TU-5, TU-50 and HT-200 is presented.
Implementation of higher order modulation schemes help
understanding the performance of Phase modulations
schemes for broadband TETRA. Implementation efficiency
is analysed in terms of Message Error Rate (MER) against
Es/No over SCH\F channel for downlink bursts in the
400MHz TETRA frequency bands.

AlexSSS
2012-04-16, 04:57 PM
Voice End-to-End Encrypted for TETRA
Radiocommunication System

Abstract— The standard TETRA (Terrestrial Trunked Radio)
system addresses a number of security issues, one being the
cryptographic protection of signaling data and user data on the
highly exposed air interface. However, user data travels
unencrypted within the network infrastructure. This precludes
the use of TETRA systems by those users who regard their
transmissions as particularly sensitive, and whose Security Policy
requires all such data to be appropriately encrypted whilst in
transit between the end terminals in any system. End-to-end
encryption addresses these concerns by encrypting data within
the transmitting terminal, and only decrypting it within the
receiving terminal. The plain data is never exposed within the
infrastructure; in fact the infrastructure contains no mechanism
to recover it should it wish to do so.

AlexSSS
2012-04-16, 05:00 PM
Monitoring and Analysis of TETRA Base Station

AlexSSS
2012-04-16, 05:05 PM
A Real-Time Intelligent Wireless
Mobile Station Location Estimator with
Application to TETRA Network

Abstract—Mobile location estimation has received considerable interest over the past few years due to its great potential in different
applications such as logistics, patrol, and fleet management. Many mobile location estimation techniques had been proposed to
improve the accuracy of location estimation. Location estimation based on artificial intelligence techniques is a recent alternative
approach. In this paper, Adaptive Neuro-Fuzzy Inference system (ANFIS) is used as a robust location estimator to locate the mobile
station (MS) using the MS geo-fencing area data within 9 km from a serving base station. Extensive evaluations and comparisons have
been performed, and a set of statistical parameters has been obtained. From the comparison of the proposed ANFIS estimator with the
neural-network-based estimators, it is found that ANFIS estimator is faster and more robust. Its Average Computation Time (ACT) is
0.076 sec. While the ACT for Multilayer Perceptron (MLP) and Radial-Based Function (RBF) neural networks is 0.88 and 1.7,
respectively. Whereas on comparing ANFIS with other techniques, it is found that in ANFIS estimator, 67 percent of the estimated
location errors do not exceed 149 m, while these for the statistical, multiple linear regression, and geometric are 170, 280, and 2,346 m,
respectively. Thus, the results clearly reveal that the proposed ANFIS estimator outperforms all other techniques.

AlexSSS
2012-04-16, 05:07 PM
General System Architecture of TETRA Network for Public Safety Services

Abstract – In the ten years since TETRA (Terrestrial Trunked Radio) standard from ETSI (European
Telecommunications Standards Institute) has been available on the worldwide market, it has become the leading
PMR (Private/Professional Mobile Radio) technology of choice especially in networks for public safety. Since it
was first standardized the system evolved in various directions, both in application and technology point of view.
This paper gives an overview of general TETRA system arhitectures available on the market today. It also gives
an in depth analisys of a specific IP based TETRA system core elements and their function in the overall
communication process.

AlexSSS
2012-04-16, 05:09 PM
WAP over TETRA Trial Services

Abstract—IP over TETRA is a solid and robust platform for
secure and reliable data communications in the field of
public safety and in for other PMR applications. In the
paper the basic concepts of WAP application over TETRA
network are presented. WAP over TETRA trial architecture
is shown and an example of Web application “Dangerous
goods” is demonstrated. TETRA enhanced data services
offered by TETRA Release 2 are discussed and an
introduction of the IP Multimedia Subsystem into the
TETRA environment is given at the end of the paper.

AlexSSS
2012-04-16, 07:26 PM
Implementation of Multi-function
TETRA Gateway

Abstract--The next generation power IT system will consist of
automated transmission and distribution systems that support
efficient and reliable supply and delivery of power. The goal is to
create a power IT system capable of handling emergency and
disaster situations, while also able to accommodate current and
future utility business environments, market requirements, and
customer needs. In this paper, we propose multi-function
TETRA Gateway (MFTG) that can convert various power IT
protocols into TETRA protocols to show that the next generation
electric power IT system can be constructed in TETRA radio
infrastructure. Our MFTG is a TETRA network equipment that
converts power IT protocols (for example, transformer load
monitoring protocol, RTU (Remote Terminal Unit) protocol for
monitoring power transmission steel tower wind direction/wind
velocity, DLMS, DNP, and IEC61850 etc...) into TETRA
protocols through short data, status messaging and packet data.

AlexSSS
2012-04-16, 07:31 PM
Impact of Voice Traffic on the Performance of Packet
Data Transmission in TETRA Networks

Abstract—This paper studies the impact of voice traffic on
the performance of packet data (PD) transmission in terrestrial
trunked radio (TETRA) networks. Particular emphasis is given
on the performance of applications characterized by occasionally
transmitting small messages between a number of radio terminals
and a fixed server while these terminals are also conducting group
voice calls. Such applications are constantly increasing in TETRA
networks, and so does the need to dimension and configure these
networks to meet their reliability, delay, and loss requirements.
However, the impact of group voice calls on PD transmission
has not been sufficiently studied, and this constitutes the main
motivation of our performance analysis. We present simulation
results for a variety of practical scenarios, and we discuss how
key performance indicators such as PD delay and loss rate are
affected by the group call activity of the radio terminals. Our
results can help in dimensioning and planning TETRA networks,
particularly in determining the number of PD terminals that can
be supported in a cell for a given traffic profile and for quality-ofservice
requirements.

AlexSSS
2012-04-16, 07:33 PM
Design of Transceiver for TETRA in UHF Band

Abstract : RE transceiver for TETRA mobile in 800MHz
UHF band was designed and fabricated. The essential
elements of transceiver such as CFL ASIC, Tx/Rx PLL
modules are also designed and fabricated. Using CFL ASIC,
more than 20dB of IMD improvement was acquired. To
accept the two mode of TETRA(TMO & DMO), two
independent PLL modules were used. The output power of
transmitter was 0.5W, the specification of EVM and ACP was
satisfied with TETRA standard and the dynamic range of
receiver was more than 60dB.

AlexSSS
2012-04-16, 07:35 PM
TETRA TECHNOLOGY: A MODERN PRIVATE CELLULAR SYSTEM

In order to meet the demand for more efficient and
flexible communication services from both PMR and
PAMR users, ETSI has developed a new standard for
digital trunked radio system named TETRA. In this
review-based paper we have discussed about the basic
services provided by TETRA system and its network
architecture along with the description of basic modes on
which this technology works

AlexSSS
2012-04-16, 07:41 PM
TETRA Outdoor Large- Scale Received Signal
Prediction Model in Riyadh City-Saudi Arabia

Abstract -TETRA outdoor large scale received signal
prediction model is presented here. The model follows logdistance
model. It is derived based on received signal strength
survey measurements of a TETRA system, operating in the
300-400 MHz band, in Riyadh City, Saudi Arabia. This model
is aimed to assist practicing engineers in the estimation of
received power, or electric field strength as well as path-loss at
any given distance from the base station or vice versa. The
value of the model exponent (n) for the selected routes is found
to be 3 ± 0.7. However, the overall value of n for urban area in
the Riyadh City is found to be 3.22. It is noted that the value of
n obtained here is low, compared to values obtained in several
European cities, as the streets are wider and the buildings are
lower in most part of the routes in Riyadh.

AlexSSS
2012-04-17, 08:30 PM
Design of Tetra Air Interface Protocol Stack Software

Abstract-The conception of Protocol Engineering is introduced
briefly, and then the properties of the TETRA air interface
protocol is presented. A method following Protocol Engineering
methodology to implement the protocol stack software is described
in detail.

AlexSSS
2012-04-17, 08:34 PM
Multiuser Channel Estimation for Detection for Cochannel Signals
in the Receiver ofTETRA Digital trunked System

Abstract In this paper, a pilot-based MMSE
technique is proposed for estimating the channel impulse
responses of multiple co-channel users in the Receiver of
TETRA Digital trunked System. Based on signal and
channel models of TETRA Digital trunked System, it which
allows time variation of the channels with and between
the training sequences. The performance of this method is
verified by simulations.

AlexSSS
2012-04-17, 08:36 PM
Evolving Public Safety Communication Systems by Integrating WLAN and TETRA Networks
ABSTRACT
This article contributes to the evolution of
public safety communication systems by specifying
a novel solution for integrating WLAN and
Terrestrial Trunked Radio (TETRA) networks.
The specified solution allows TETRA terminals
to interface to the TETRA Switching and Management
Infrastructure (SwMI) over a broadband
WLAN radio access network, instead of
the conventional narrowband TETRA radio network.
These terminals are fully interoperable
with conventional TETRA terminals and can
employ all TETRA services, including group
calls, short data messaging, packet data, and so
forth. In addition, however, such terminals can
support a range of brand new capabilities
enabled by the WLAN, such as broadband data
services, true concurrent voice and data services,
simultaneous reception of many group calls,
reduced call setup and voice transmission delays,
improved voice quality, and so forth. The specified
solution is solely based on IP multicast and
Voice-over-IP (VoIP) technologies and thus fits
ideally to the all-IP architecture being introduced
by the MESA project for the next generation
of public safety and disaster relief
communication systems.


to be continued...:)

karim
2012-05-01, 07:19 AM
Hi,

Very good and useful documents, why not compile them all together in one compressed folder?
Or perhaps this way there will be more points to collect :)

/Karim

AlexSSS
2012-05-01, 06:24 PM
I post them as far as finding, among other documents that interest me, if you look closely, they are not posted out all in one day. But if there is such a need, in the end I'll post a general archive of publications on the topic, but I do not know when I finish work on this topic...

AlexSSS
2012-05-01, 06:37 PM
And the next interesting paper:

Path Loss Model for TETRA Networks in Metropolitan Areas

Abstract
This paper reports on measurements of the
attenuation in the transmitted RF'-power of a TETRA
system, operating in the UHF band The
measurements data are consistent with a log-distance
path loss model for arbitrary T-R separation, with a
path loss exponent n = 4.0 f 0.5. Small scale fading
is characterized by a Gaussian signal level
distribution (lognormal) with standard deviation U =
8.6 f 0.2. Furthermore, the reference distance in the
,far ,field of the transmitting antenna from the
measurements is do= I km. Interestingly, the average
. value of the received UF-power approaches a level
close to the dynamic sensitivity of the TETRA
receivers at approximately the same distance (around
5 km) from a base station, for various low-altitude
base station locations with similar transmission
characteristics. This distance provides a simple
characterization reference indicative of the
attenuation of the RF-power in the particular urban
environment; it also provides a rule of thumb for cell
planning in metropolitan locations similar to that of
the Greek capital.

AlexSSS
2012-05-03, 03:34 AM
A Statistical Traffic Analysis of Group Speech Communications in
the German TETRA Trial Aachen

Abstract
In this paper. we present a novel model for group
speech communications. This model includes timing
parameters as well (U parameters fur spatial distribution
and communications topology., parameters
values for this model are derived from the German
Terrestrial M e d Radio (TETRA) trial Aachen.
In order to derive generalized parameters values,, we
study statistical relationships between model parameters
and other measured values. Finally, we apply
the new traffic model to a queuing model of a TETRA
system and study Quality of Service (QoS) aspects.

AlexSSS
2012-05-06, 03:59 AM
TETRA (Terrestrial Trunked Radio) - Technical Features and Application
of Professional. Communication Technologies in Mobile Digital Radio
Networks for Special Purpose Services

Abstract - TETRA Standard, within the European Telecommunication Standards Institute ETSI defines U digital mobile radio system for voice and data communication in Ultra High Frequency (UHF) band. 7he main function of the system is to provide service to Private Professional Mobile Radio (PMR) @pes of users. TETRA system offers a robust and professional mobile communication through cell @pe system deployments. traditional PMR telephony and digital data transmission. It is a highly reliable system suitable for use by different Qpes of mers that require their communication system to provide instant transmission, high reliability and availability with an additional set of services designed to accommodate the everyday. use of the system m well as provide unconditional support in extraordinary circumstances. This paper describes a technical solution for a TETRA network covering the Croatian coast and islundr, the Adriatic Sea and the protected Croatian ecological area in the Adriatic. n e technical solution is developed for the needs of interested government institutions, 1 I2 protection and rescue service, Automatic
Identification System for traffic control in the Croatian national sea and other potential users.

AlexSSS
2012-05-06, 04:07 AM
Professional Mobile system - TETRA over IP
and IP over TETRA

Abstract- Terrestrial Trunked Radio is a system used for
professional mobile radio or public access mobile radio. TETRA
is designed for different institutions: Dam, Telekom, airports,
security organisations, etc. The system is applied for wireless
technologies like IP over Tetra, Tetra over IP, and WAP. We
dcsrribe this kind of system (IP/TETRA,TETRAnP,WAP). The
most important point of the system is encryption data for
different kind of users. We describe a system which already
exists in Slovenia.

karim
2012-05-07, 12:02 AM
Hi,

Your efforts are highly appreciated AlexSSS.
The proposal was meant to make it easier for members to get all documents at one shut.


BR,
Karim

AlexSSS
2012-05-07, 12:35 AM
To Karim:

Hi! After I finish search of documents on the subject, I share all posted documents in one archive. I promise.

drivedream
2012-05-07, 04:00 PM
A Diversity Reception Scheme for TETRA Multi-carrier System

AlexSSS
2012-05-07, 10:44 PM
TETRA protocol interfaces features and potential applications in Railway

Abstract: TETRA is a TDMA Digital PMRPAMR network
standard. This paper describes its functional network architecture,
discusses its standard interface types, associated features, and
potential applications of the system in railway system.
Key words: TETRA, PMR, PAMR, Air Interface, TDMA

AlexSSS
2012-05-07, 10:48 PM
DEVELOPMENT OF A TRAFFIC SIMULATOR FOR MOBILE COMMUNICATION
NETWORKS BASED ON TETRA TECHNOLOGY

Abstract - In this paper, we present a computer-tool to
simulate traffic over a mobile communications network
based on TETRA (Trans European Trunked RAdio)
technology. This tool is specifically oriented to estimate
network performances, previous to the network
development, in order to make an optimum network design.

AlexSSS
2012-05-09, 05:45 PM
The Effect of Human Presence on Signal Power
Received at a TETRA Handled Device

Abstract - The attenuation of the radio signal in the near field of a
tetra handled device due the the presence of human body is measured.
By including a confidence margin for the mean and the standard
deviation of the measurements we find in open area 8.4dB attenuation
when the handled device is at talking position close lo the head and
19.3dB when it is placed at the belt. In urban environment the
corresponding values ore 11.2 and 9.2d dB respectively. Detailed
measurements are presented and discussed.

AlexSSS
2012-05-13, 06:02 PM
Radio Channel Description and Quality of Service
for TETRA Direct Mode Operation in Forest Environments

Abstract- This paper describes radio channel and BER investigations
performed in various scenarios typical to the TETRA Direct Mode Operation
(DMO), in a forest area. The data from radio channel sounding measurements
was analyzed in terms of average fade duration and envelop CDF.
The same data was used to evaluate the unprotected BER on a TETRA
communication link. The BER level distribution was compared to the the
distribution obtained when simulating a pedestrian speed TETRA DMO
radio channel. The dynamics of the mobiles can have a strong influence
on the radio link quality. As a general tendency, higher practical BER values
can be expected as compared to the simulations when using the simple
TETRA radio channel model.

AlexSSS
2012-05-13, 06:04 PM
An NAI resolution mechanism for GPRS and TETRA PMR networks

INTRODUCTION
Dialup users of data networks that use the Point-Point Protocol
(PPP) make use of a Network Address Identifier (NAI) [4] for
user identification. NAI is also being used for roaming and
tunneling service in data networks. On the other hand, cellular
networks make use of an alternative user identification format
which is usually the International Mobile Subscriber Identity
(IMSI) or the Mobile Identification Number (MIN). Similarly,
Terrestrial Trunked Radio (TETRA) based Professional
Mobile Radio (PMR) networks make use of the Individual
TETRA Subscriber Identity (ITSI) for user identification.
With the impending integration of cellular RMR networks and
data networks, it is desirable to have a one-one mapping
between IMSI/MIN/ITSI and NAI. An operational procedure
is needed whereby such a mapping occurs within the network
and is transparent to the user. The MobileIP working group
‘within the IETF is currently investigating such a mapping [3]
for cellular networks. However, no mechanisms have been
described for GPRS or TETRA networks. In this report, we
outline a mechanism for such a mapping and the associated
operational procedures when the cellular network is a General
Packet Radio Service (GPRS) [l] network and also when the
access network is a TETRA PMR network.

AlexSSS
2012-05-13, 06:07 PM
Link adaptation to improve coverage in
TETRA PMR system

An investigation is presented into the application of link
adaptation, the alteration of channel coding depending on the
channel quality, to speech transmission in terrestrial trunked radio
(TETRA) systems. A comparison is made of the performance of
the technique to that obtained under quasi-synchronous operation
which is also proposed for TETRA range extension.

AlexSSS
2012-05-13, 06:11 PM
DYNAMIC BEARER SELECTIONS SCHEMES IN AN ADAPTIVE TETRA
RESOURCE MANAGER AND THEIR INFLUENCE ON QOS

Abstract - This paper investigates the use of link adaptation
techniques for the TETRA air interface. For this purpose, a
radio resource management scheme is presented along with
the notion of quality of service (QoS) contract. A QoS
contract is the means for specifying the expected network
performance and optionally enables the user
applicatiodservice to specify a degree of degradation
tolerance over the wireless link. The paper presents
simulation results showing the effect of various parameters
on what can be delivered by the TETRA system.
Furthermore, a service adaptation scheme for multimedia
applications is presented for complementing link adaptation.

AlexSSS
2012-05-13, 06:13 PM
Simulation Analysis of the Air Interface
Protocol for TETRA system

Abstract: In this paper, the developing
prospect of the digital trunking system is
introduced firstly. On the basis of the computer
simulation for the TETRA air interface protocol,
the collision ratio and the mean number of
success access in the MCCH with the random
access method of the ALOHA protocol is
analyzed and proved, as well as the relationship
between call loss, channel utilization and the
system traffic. And then the capacity for the
users of the standard mode of TETRA system is
calculated

AlexSSS
2012-05-13, 06:17 PM
SPACE DIVERSITY RECEPTION TECHNIQUES FOR THE TETRA PMR
SYSTEM

In mobile radio systems the effects of fading can be
counteracted by the use of diversity techniques either at
the base station or the mobile. Since reducing fading,
diversity schemes contribute to the reduction of the bit
error rate that degrades the performance of any
modulation scheme. This paper attempts to determine
the performance of a typical TETRA system, without
diversity for a variety of operating conditions and
environments. This will provide a benchmark for
assessing any benefits that diversity techniques will
bring. Also it aims to find the limits of performance that
can be achieved by using a two-branch

AlexSSS
2012-05-13, 08:56 PM
The lessons of Tetra

Sorne shel.t--range radio devices are suffering interference
from the Tetra radio system. Nick Long reviews the origins of
this problem and the lessons for radio designers

AlexSSS
2012-05-13, 08:59 PM
Quasi-Synchronous Digital Trunked TETRA Performance

Abstract— In some private mobile radio/public access mobile
radio (PMR/PAMR) applications, there is a stringent need
for high-coverage locations probabilities. A spectrally efficient
approach in this case is the use of several radio transmitters
operating in simulcast mode. There have been several analog
mobile radio systems working in this way up to now, but less
is known about the performance of digital trunked radio systems
operating in simulcast mode. In this paper, predicted digital
Trans-European Trunk RAdio (TETRA) system performance
results operating in quasi-synchronous mode are presented. These
results were obtained by simulation of such a system under a wide
range of operational conditions. A comparison is also presented
with the European analog standard MPT 1327 currently in operation.
It has been concluded that quasi-synchronous techniques
well known in analog PMR/PAMR can also be successfully used
in digital PMR/PAMR applications.

AlexSSS
2012-05-13, 09:04 PM
PERFORMANCE IMPROVEMENT BY USING DIFFERENT
TRANSMISSION TECHNIQUES FOR THE DIGITAL MOBILE RADIO
SYSTEM TETRA

Abstract.-This paper deals with different transmission
techniques in order to improve the TETRA system
performances. First of all, it describes briefly what is
TETRA and which are the propagation models standardised.
After that it will be explained what type of equalizers and
diversity systems have been evaluated. Finally, results of
simulations will be shown and analysed as well as some
conclusions.

AlexSSS
2012-05-13, 09:06 PM
COVERAGE STRATEGY IN TETRA QUASI-SYNCHRONOUS SYSTEMS

Abstract
In this paper, the effect of the spalcing distance between the base stations on the BER performance of a quasisynchronous
TETRA system is investigated. Two models are presented, the first assumes two base stations
are used to cover the service mea while the second model considers a system where the service area is
covered by seven base stations. jBoth models are implemented by computer simulation. Simulation results
suggest that wide area coverage can be achieved by dividing the service area into a number of zones (cells),
with each zone being a quasi-synchronous area served by several base stations

AlexSSS
2012-05-13, 09:13 PM
PERFORMANCE EVALUATION OF TETRA IN HILLY AND URBAN
TERRAIN, AND IN A QUASI-SYNCHRONOUS ENVIRONMENT

Abstract In this paper, the performance of TETRA modulation in a dificult urban, a hill
terrain and in a quasi-synchronous environment, are evaluated. Under the urban and hilly
terrain conditions, a 2-ray model is used to evaluate the noise performance. lri the simulcast
environment, a 2..ray as well as a 4-ray model are used to evaluate the noise performance.
Degradation in The performance due to different impairments, such as frequency offset,
di, ferentia1 delay and amplitude imbalances. are investigated and illustrated graphically.

AlexSSS
2012-05-13, 11:23 PM
NOTE: The next document is too old, but who knows maybe it will be also useful:

DESIGN OF THE TETRA MOBILE RADIO AIR INTERFACE PROTOCOL (1993)

ABSTRACT
Studies run by the European Telecommmunications
Standards Institute (ETSI) to establish the TETRA
digital mobile -ed radio standard are presented. The
format of the physical burst structure is examined and
properties of the air interface protocol described.
Simulated performance of a digital communication
system corresponding to the basic characteristics of
TETRA on the mobile radio channel are given. DilTerent
channel coding schemes are studied to find the best
compromise solution for the random access slot format.
The joint selection is presented between the error control
scheme for signalling channels, the dimensioning of
signalling messages, and the call set-up procedure, in
order to optimize the call set-up time performance and
the throughput efficiency.

AlexSSS
2012-05-13, 11:26 PM
NOTE: The next document is too old, but who knows maybe it will be also useful:

SPEECH TRANSMISSION IN TETRA (1993)

Abstract This paper briefly describes the TETRA standard, details the requirements for speech
transmission in this system, describes the procedure adopted for selection of a codec algorithm
and gives details of one of the codec candidates.

AlexSSS
2012-05-13, 11:30 PM
NOTE: The next document is too old, but who knows maybe it will be also useful:

CRYPTOGRAPHIC SECURITY FOR THE NEW TRANSIEUROPEAN TRUNKED
RADIO (TETRA) STANDARD (1994)

AlexSSS
2012-05-13, 11:33 PM
NOTE: The next document is too old, but who knows maybe it will be also useful:

PERFORMANCE STUDIES OF THE TETRA MOBILE RADIO SYSTEM (1996)

Abstract A basic introduction to the TETRA voice plus
data mobile radio system is presented and call set up
procedures examined. Results of a computer simulation
indicate that call set up procedures without a presence check
on the called party are significantly faster than call set ups
in which the presence of the called party is checked before
establishing the call. Some preliminary results of a
parameter study to show the affect of slotted ALOHA
parameters on access performance are also presented.

AlexSSS
2012-05-13, 11:36 PM
NOTE: The next document is too old, but who knows maybe it will be also useful:

Voice and data services in power utilities
using a TETRA system (1996)

Private land mobile communications have experienced significant
demand for increased capacity and for new services, but
congestion within the currently allocated 150 and 450MHz bands
has severely limited the capability of present generation systems to
meet this demand. The authors show the use of a transEuropean
trunked radio system (TETRA) standard to provide a telecontrol
service for a medium size power utility. They introduce the
concepts of TETRALAN architecture to support Communications
inside a substation, and TETRAWAN architecture as the
backbone radio network. Finally, system performance is increased
by using the silence gaps inherent in speech.

AlexSSS
2012-05-13, 11:41 PM
NOTE: The next document is too old, but who knows maybe it will be also useful:

TETR ASIIM: A simulation software package for ana1y:zing the
TETRA receiver performance (1995)

Abstract-TETRA (Trans-European Trunked RAdio) is a
new digital mobile radio standardl currently being defined by
ETSI (European Telecommunications Standards Institute). It
will offer a wide range of services and facilities with a greater
spectrum efficiency compared to the present analog PMR
(Private Mobile Radio) systems. This paper reports a
description of the main features of a software package
developed according to TETRA specifications and the
simulation results obtained for some of the traffic channels
specified by the standard, in terms of BER (Bit Error Rate). As
far as the simulated receiver scheme is concerned, the
characteristics of the equivalent low-pass filters and the
adopted synchronization technique are reported. The
simulated demodulator uses a differential detection scheme
with soft decision outputs in the case of coded channels.

AlexSSS
2012-05-13, 11:45 PM
NOTE: The next document is too old, but who knows maybe it will be also useful:

RADIO PERFORMANCE OF LOGICAL CHANNELS DEFINED IN TETRA STANDARD (1997)

Abstract- TETRA (Trans-European Trunked RAdio) is a
digital mobile radio standard for voice and data
transmission. It aims at satisfying the girowing request of
applications and facilities coming from ]professional users
and elmergency services. The system is at advanced level of
standardization by ETSI (European Telecommunications
Standurds Institute) and is provided an European
harmonized frequency band.
This paper reports TETRA logicall channels radio
performance carried out by TETRASIM, a simulation
software package, entirely developed at CSELT, which
allows for the system radio chain modellling, according to
the standard specifications. Performance analyses and
results comparison are provided by taking into account
the effects of co-channel interference, propagation models
and mobile unit speed. The simulation results reported in
this work were included inside the ETR (ETSZ Technical
Report)

AlexSSS
2012-05-13, 11:49 PM
NOTE: The next document is too old, but who knows maybe it will be also useful:

PERFORMANCE OF CHANNEL CODING TECHNIQUES FOR THE DIGITAL
MOBILE RADIO SYSTEM TETRA (1997)

Abstract.-This paper deals with channel coding techniques
for the digital mobile radio system TETRA. First of all, it
describes briefly what is TETRA and which are the codes
standardised in order to control errors. After that it will be
explained what simulations have been carried out and the
environments considered. Finally, results of simulations will
be shown and analyzed.

AlexSSS
2012-05-13, 11:52 PM
NOTE: The next document is too old, but who knows maybe it will be also useful:

TETRA PMR, AND ITS POTENTIAL RELATIONSHIP WITH UMTS (1998)

This paper reviews the service which will be provided by TETRA (Terrestrial Trunked Radio) based
PMR systems and discusses how this service could be pragmatically integrated into UMTS access
and service models. The scenario for convergence with UMTS is discussed and a possible evolution
path, to realise TETRA as an integrated part of communications with the 2lSt Century is outlined.

AlexSSS
2012-05-29, 03:36 PM
And as I promise all papers in one archiv.
link and pw:27651