Performance evaluation of bandwidth efficient block-coded schemeson a mobile radio channel

摘要

The performance of bandwidth-efficient Reed-Solomon codedmultiphase signalling schemes is evaluated on a shadowed Rician fadingchannel using different decoding strategies, namely, errors-only,erasures-and-errors, and soft-decision decoding. The error bounds arecalculated and examined by simulation for the RS(7,5)-coded 8 PSK schemeas an example, on a shadowed Rician channel with different degrees ofshadowing. It is shown that the performance of this scheme issignificantly improved compared to the uncoded QPSK. This improvementdepends on the signal-to-noise ratio, decoding strategy, and the degreeof shadowing. A comparison between different decoding techniques fordifferent degrees of shadowing shows that the use of channel measurementinformation in the decoding process is more effective for heavilyshadowed channels