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本文给出利用单片维特比译码器实现 64QAM格栅编码调制 (TCM)解调电路的方案。采用这种方法可以避免 64QAM TCM解调电路难以实现的困难 ,在传输带宽保持基本不变的条件下 ,可以取得 3d B的编码增益。
This paper presents a scheme to realize 64QAM trellis coded modulation (TCM) demodulation circuit by using a monolithic Viterbi decoder. This method can avoid the difficulty of 64QAM TCM demodulation circuit difficult to achieve, in the transmission bandwidth to maintain the same basic conditions, you can get 3dB encoding gain.