Maximum-SNR Optimal Weighting Matrix for Multiple Relay-Antenna-Assisted Orthogonal Space Time Block Codes
Wei Liu, Chuan Li, Jiandong Li, Lajos Hanzo · IEEE Transactions on Vehicular Technology · 2012
An optimal linear weighting matrix is proposed for nonregenerative multiple relay-antenna-assisted orthogonal space time block codes, which results in the maximum received signal-to-noise ratio (SNR) at the destination. The proposed optimal design of the linear weighting matrix achieves an approximately-15-dB SNR gain over the naive weighting matrix at the bit error rate (BER) of 10-3as a benefit of efficiently exploiting the diversity gain provided by the multiple relay antennas.