摘要
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。
The circuit scheme for demodulating the 64QAM Trellis Coded Modulation(TCM) signal by a chip of Viterbi decoder is presented in this paper. Making use of this method, the difficulty could be avoided for realizing a 64QAM TCM demodulation circuit, and 3dB coding gain could be obtained under the condition of maintaining the transmission bandwidth almost to be unchanged.
出处
《电子器件》
EI
CAS
2000年第4期252-257,共6页
Chinese Journal of Electron Devices
