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ahmedtaha
2011-11-08, 09:19 PM
hi all

Abstract
3GPP LTE (Long Term Evolution) is the evolution of the UMTS which will make possible to deliver next
generation high quality multimedia services according to the users' expectations. Since the LTE
performance evaluation needs link and system level simulations, a software tool to simulate the LTE
Downlink based on OFDM technology with MIMO antenna processing is presented in this master thesis.
This simulator contains the MIMO algorithms, the spatial channel models and modulation and coding
schemes for LTE. The result of this simulator serves to evaluate the OFDM-MIMO LTE Link Level
performance in different environments and create link level look-up tables to be used as an input for a
future LTE system level simulator.
Table of Contents
Chapter 1. Introduction............................................................................................................................1
1.1.Outline of this Master Thesis.............................................................................................................3
Chapter 2. Overview of the 3GPP LTE Air Interface .............................................................................4
2.1. 3GPP LTE Air Interface basic concepts............................................................................................4
2.2. Key Technologies of the 3GPP LTE Air Interface............................................................................5
2.2.1. OFDM ....................................................................................................................................5
2.2.2. MIMO ...................................................................................................................................8
2.3. LTE Downlink Physical Layer overview........................................................................................10
2.3.1. LTE radio interface protocol architecture...............................................................................10
2.3.1. DL Physical Layer features....................................................................................................12
2.3.2. DL Frame Structure and physical resource elements.............................................................15
Chapter 3. DL Link Level Simulator Overview....................................................................................17
3.1. DL Link Level Simulator description.............................................................................................17
3.1. E-UTRA physical channel modulation ..........................................................................................19
3.2. LTE downlink physical channel processing ...................................................................................20
Chapter 4. E-UTRA DL Link Level Simulator: MIMO-OFDM physical channel.............................23
4.1. MIMO Wideband Mobile Channel Model......................................................................................23
4.2. Narrowband channel model per subcarrier in MIMO-OFDM system.............................................25
4.3. Correlation-based MIMO radio channel stochastic model..............................................................26
4.4. Physical interpretation of full MIMO channel knowledge..............................................................30
4.5. MIMO Techniques.........................................................................................................................32
4.5.1. Open Loop Spatial Multiplexing: ZF and MMSE ..................................................................33
4.5.2. Open Loop Transmit Diversity: SFBC....................................................................................35
Chapter 5. UTRA DL Link Level Simulator: Channel Coding, Rate Matching and HARQ..............37
5.1. Channel Coding and Rate Matching features..................................................................................37
5.1. E-UTRA Turbo Coding...................................................................................................................39
5.2. LTE Rate Matching and HARQ processes for turbo coded transport channels...............................43
Chapter 6. Simulations and results..........................................................................................................45
6.1. Link Level Simulator Parameters...................................................................................................45
6.2. Validation of the SISO and MIMO OFDM multipath channel........................................................47
6.3. Performance of the different LTE Downlink AMC schemes with MIMO assumption....................48
Chapter 7. Conclusions and Future Work .............................................................................................52
Bibliography............................................................................................................................................53
Appendixes...............................................................................................................................................57
Appendix 1.E-UTRA DL Link Level Performance Results...................................................................57
A1.1.E-UTRA DL Link Level Throughput.......................................................................................57

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hendral
2011-11-09, 12:43 AM
Better you share it freely czs You get freely from net.

Resistor
2011-11-09, 01:27 AM
(Oops, made a mistake -- posted in the wrong thread, sorry)

labviewlover
2011-11-09, 10:45 AM
http://upcommons.upc.edu/pfc/bitstream/2099.1/6978/1/AlbertSerra_MasterThesis.pdf