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本文研究了调频调相信号集的格形编码信号，在瑞利衰落信道上的误码性能．并在此条件下，导出误码率的实用表达式，且给出格形编码的例子．
In this paper, we study the BER performance of the trellis-coded signal in Rayleigh fading channel. Under these conditions, a practical expression of bit error rate is derived and an example of trellis encoding is given.