Symbol Error Rate of Quadrature Subbranch Hybrid Selection/Maximal-Ratio Combining in Rayleigh Fading Under Employment of Generalized Detector

The symbol-error rate (SER) of a quadrature subbranch hybrid selection/maximal-ratio combining scheme for 1-D modulations in Rayleigh fading under employment of the generalized receiver, which is constructed based on the generalized approach to signal processing in noise, is investigated. At the generalized receiver, N diversity branches are split into 2N in-phase and quadrature subbranches. Traditional hybrid selection/maximal-ratio combining is then applied over 2N subbranches. M-ary pulse amplitude modulation, including coherent binary phase-shift keying (BPSK), with quadrature subbranch hybrid selection/maximal-ratio combining is investigated. The SER performance of the generalized receiver under quadrature subbranch hybrid selection/maximal-ratio combining and hybrid selection/maximal-ratio combining schemes are investigated and compared with the conventional hybrid selection/maximal-ratio combining receiver. The obtained results show that the generalized receiver with quadrature subbranch hybrid selection/maximal-ratio combining and hybrid selection/maximal-ratio combining schemes outperforms the traditional hybrid selection/maximal-ratio combining receiver.