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A load balancing relay selection algorithm (LB-RS) is presented for relay based cellular networks. According to current user channel conditions as well as the user numbers that relay serves, LB-RS chooses the optimal relay node for each user in a distributed way. Simulation results demonstrate that compared with other relay selection schemes, LB-RS can achieve load balancing through effective relay...
It is well known that the Bahl, Cocke, Jelinek and Raviv (BCJR) and Viterbi decoding algorithms for convolutional codes are optimal over additive white Gaussian noise (AWGN) channels. The BCJR algorithm is optimal in the sense that it maximizes the a posteriori probability of each bit and Viterbi algorithm is optimal in that it maximizes the likelihood of each decoded codeword. However, experimental...
Space diversity is a simple and cost-effective technique to combat fading in wireless channels. For small handheld devices with limited space and power for multiple antennas, cooperative diversity is proposed. In cooperative diversity, adjacent users to a certain user, using their own antennas, act as relays to create ”virtual space diversity” for the source user. The success of cooperative diversity...
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