A Proposal of RM QRM-MLD with Independent Adaptive Control of Surviving Symbol Replica Candidates for MIMO-OFDM System

In this paper, we propose the algorithm that combine RM QRM-MLD algorithm we proposed and independent adaptive control of surviving symbol replica candidates (we call this technique IAC) using Manhattan metric as method of metric calculation, and evaluate the BER performance and computational complexity of this algorithm. Combining RM QRM-MLD and IAC, within a high Eb/No range, the BER performance of the algorithm degrade because of excess reduction of surviving symbol replica candidates at each stage. Thus, in this case, there is a proper value of the parameter X for each Eb/No value. We investigate the value and simulate the BER performance and computational complexity in the case of application of the proper value.