基于TTCM的联合编码调制算法  

Joint Source /Channel Coding Modulation Algorithm Based on TTCM

作　　者：郭东亮[1] 束锋[1] 吴乐南[1] 

机构地区：[1]东南大学无线电工程系,江苏南京210096

出　　处：《电子学报》2003年第7期1092-1094,共3页Acta Electronica Sinica

基　　金：国家自然科学基金 (No 60 0 72 0 1 3)

摘　　要：提出了一种具有高频带利用率和高重建质量的联合编码调制算法 .采用Turbo码网格编码调制TTCM作为编码调制 (CM)方案 ,按“最小化端到端失真”准则最优化设计信源解码器 ,直接利用TTCM解码输出的软判决值进行信源译码 .仿真表明 ,相对于硬判决分离译码 ,本文算法将重建信号的信噪比提高了约 2dB .A joint source/channel coding modulation algorithm based on TTCM (Turbo Trellis-Coded Modulation) is presented, which achieve bandwidth-efficient and high reconstructive quality. The source decoder is optimized by minimizing the end-to-end system distortion. The soft output values of TTCM decoder are applied directly to the designed optimal source decoder. Simulation results show that compared with the system with hard decoding, the proposed algorithm can objectively gain 2 dB improvement of decoded source in terms of SNR.

关 键 词：Turbo码网格编码调制 端到端失真 软判决译码 

分 类 号：TN919.3[电子电信—通信与信息系统]