作　　者： ; ; ;

机构地区： 电子科技大学电子工程学院

出　　处： 《系统工程与电子技术》 2005年第10期1694-1696,1756,共4页

摘　　要： 研究了基于LDPC码的自适应编码调制技术及其在慢衰落无线信道图像传输中的应用,分析了确定最优信噪比转换门限集合的最小均方误差非线性曲线拟合法,进而得到基于LDPC码的自适应编码调制系统的最大平均吞吐量性能。仿真结果表明,在慢衰落无线信道图像传输中,系统能获得满意的图像传输质量和很高的频谱利用率。 The adaptive coded modulation based on LDPC codes and its application over the flat fading wireness channel in image communication is proposed. The least mean-square error nonlinear curve fitting method is introduced to get the switching threshold for throughput maximization of adaptive system. The average throughput performance of the adaptive system based on LDPC codes is obtained by this means. Simulation results show that the system can get satisfactory image communication pcrformance in the very high spectral efficiency situation over the flat fading channel.

关 键 词： 码 自适应编码调制 图像传输 吞吐量

领　　域： [电子电信] [电子电信]