Reed Solomon Coded Cooperation Scheme in Mobile Communication Networks and Application

Coded cooperative communication technique utilizes single antenna mobiles in a multiuser environment that share their antennas and incorporates channel coding in order to achieve transmit diversity. This thesis presents a new coded cooperation scheme based on Reed Solomon (RS) codes. The RS codes are very effective in correcting random symbol errors and random burst errors over wireless fading channels. The new coded cooperation system splits the data into two frames, using a mask vector arithmetic operation. The new scheme offers significant diversity gain improvement as compared to the renowned coded cooperation scheme that utilizes the Rate-Compatible Punctured Convolutional Code (RCPC). This work also derives the mathematical outage probability expressions for new RS coded cooperation scheme that proves its capacity to achieve full diversity gain. The diversity order is equal to two for two RS coded cooperation scheme. The analytical outage probability under various inter-user and uplink channel conditions shed light on the relative virtues of the two-user RS coded cooperation scheme as compared to previous technique and the non cooperation schemes. The three-user coded cooperation scheme is an extension of the two-user cooperation scheme. This thesis also presents the mathematical derivations of the outage probability expressions for this new threeuser RS coded cooperation scheme. The derived outage probability expressions prove that full diversity is also achieved by the three-user RS coded cooperation scheme. The outage probability expressions derived in this work reveal several performance characteristics of the three RS coded cooperation scheme at various rates. Numerical BER comparisons show that the proposed threeuser RS coded cooperation scheme performs better than two-user one, under various inter-user and uplink channel conditions. This thesis also develops a coupling algorithm that offers near optimal solution in selecting a partner. The algorithm offers huge reduction in searching time as compared to the exhaustive search. This thesis also proposes a new Unequal Error Protection (UEP) image transmission system that incorporates Lifting Wavelet Transform (LWT) and RS coded cooperation scheme is used to increase image transmission diversity, as well as saving transmission bandwidth. The low frequency sub-bands are partitioned into two sets of data and they are transmitted using the RS coded cooperation scheme. The high frequency sub-bands data are transmitted directly to the base station. Results show that the new UEP image transmission system using LWT based RS coded cooperation scheme achieves diversity gains as well as saving transmission bandwidth as compared to the image transmission system with non cooperative system under slow Rayleigh fading channel.