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Relay is considered as one of the candidate key technologies of LTE-advanced for it brings broader cell coverage and higher system capacity.Distributed Space-Time Coding (DSTC) not only exploits the spatial diversity from the relay structure,but also brings some coding gains.According to the performances of existing DSTC schemes,the Demodulate-and-Forward (DMF) scheme is the best candidate for DSTC in LTE-Advanced system.Moreover,a threshold-based selective relaying scheme for DSTC is proposed to solve the error propagation of DMF.This scheme can achieve excellent performance gains at the cost of little system complexity.
Relay is considered as one of the candidate key technologies of LTE-advanced for it to bring broader cell coverage and higher system capacity. Distributed Space-Time Coding (DSTC) not only exploits the spatial diversity from the relay structure, but also brings some encoding gains . According to the performances of existing DSTC schemes, the Demodulate-and-Forward (DMF) scheme is the best candidate for DSTC in LTE-Advanced system. Moreover, a threshold-based selective relaying scheme for DSTC is proposed to solve the error propagation of DMF. This scheme can achieve excellent performance gains at the cost of little system complexity.