Resource Allocation Scheme In Cooperative Relay Communication Systems With Network Coding

Cooperative relaying technology plays an increasingly important role in wireless communication services, which improves transmission rate and expands network coverage. Network coding is a n overwhelming triumph applied in cooperative communication system, it can effectively enhance system robustness and promote the spectral efficiency of the system. In addition, Effective resource allocation scheme in the multi-relay cooperative system with network coding can further reduce the bit error rate and increase system capacity, it has importantly theoretical and practical significance.With single-node transmitting power and total transmit power constraints, power allocation problem which minimizes bit error rate and maximizes system capacity respectively is studied. To be more specified, the optimal power allocation scheme was presented, and power allocation and subcarrier allocation based on shuffled frog-leaping algorithm(SFLA) and glowworm swarm optimization(GSO) is proposed respectively. What’s more, mathematical model of resource allocation take into account energy-efficient is derived in the cooperative communication with network coding.Using SFLA and GSO approach, we solve this problem efficiently.Power allocation model and subcarrier allocation model are analyzed, then the optimal resources allocation scheme is achieved. Simulation and numerical results demonstrate that proposed power allocation scheme achieves better performance with lower bit error rate up to 2.44%~6.17%. Subcarrier allocation algorithm in the cooperative relay system can effectively improve the overall transmission rate under the equivalent power. Resource allocation schemes on SFLA with individual required Qo S can effectively reduce total transmission power.