Distributed Space-Time Coding in LTE Systems

摘要

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.