aubidamax
2011-09-05, 07:39 PM
Abstract
Orthogonal Frequency Division Multiple Access (OFDMA) is specified as downlink
multiple access scheme in 3GPP LTE which divides the available bandwidth into
multiple narrow orthogonal frequency bands. Thus, there is no ISI (Inter Symbol
Interference) within the cell boundary. As the whole frequency spectrum is available in
a cell site there would be greater chance of ICI (Intercell Interference) among the cell
edge users of adjoining cells if frequency bands are allocated without any arrangement.
This ICI can be mitigated with the help of different arrangements of frequency bands
allocations and possibly with different transmission power distinguishing between the
cell centre users and cell edge users.
In this thesis work different ICI mitigation techniques are analyzed with different
frequency allocation schemes and transmission power, and also different radio resource
scheduling algorithms are analysed to enhance bandwidth efficiency and throughput.
Orthogonal Frequency Division Multiple Access (OFDMA) is specified as downlink
multiple access scheme in 3GPP LTE which divides the available bandwidth into
multiple narrow orthogonal frequency bands. Thus, there is no ISI (Inter Symbol
Interference) within the cell boundary. As the whole frequency spectrum is available in
a cell site there would be greater chance of ICI (Intercell Interference) among the cell
edge users of adjoining cells if frequency bands are allocated without any arrangement.
This ICI can be mitigated with the help of different arrangements of frequency bands
allocations and possibly with different transmission power distinguishing between the
cell centre users and cell edge users.
In this thesis work different ICI mitigation techniques are analyzed with different
frequency allocation schemes and transmission power, and also different radio resource
scheduling algorithms are analysed to enhance bandwidth efficiency and throughput.