Trellis-coded 8-DPSK with postdetection combining diversity for digital land mobile radio

The performance of rate 2/3 postdetection combining diversity TCM-8DPSK systems is analyzed. A simulated Rayleigh mobile radio channel and the presence of cochannel interferers are assumed. Only the case where an ideal interleaving/deinterleaving process is used to further combat the Rayleigh fading is considered. Bit error rate (BER) is obtained through computer simulation as a function of signal-to-noise ratio (SNR) and carrier-to-interference average power ratio. Results obtained for the QDPSK and TCM-8DPSK schemes are considered as a reference to determine the performance improvements introduced by the coding diversity set-up