Comparison of TCM and BCM schemes on frequency-selective Rayleighfading channels with soft-output algorithms

摘要

Trellis-coded modulation (TCM) is well-known for achieving codinggain in additive white Gaussian noise (AWGN) channels withoutsacrificing additional bandwidth. Block-coded modulation (BCM) has beenstudied as a counterpart to TCM. In this paper, we consider thepossibility of applying BCM to a frequency-selective Rayleigh fadingchannel with soft-output equalizers. A comparison of error performancebetween TCM and BCM has been made. Our results show that BCM schemeshave comparable performance to TCM schemes with less decoding complexityand the relative performance among coding schemes depends on the type ofequalizers