基于SVD算法的地面数字电视信号传输系统信道估计研究  

Research on Channel Estimation of Ground Digital Television Signal Transmission System Based on SVD Algorithm

作　　者：杨永强 YANG Yongqiang(Jinan Radio and Television Station,Jinan 250014,China)

机构地区：[1]济南广播电视台,山东济南250014

出　　处：《电视技术》2025年第1期21-24,28,共5页Video Engineering

摘　　要：近年来,随着数字电视技术的快速发展,我国以时域同步正交频分复用(Time Domain Synchronous Orthogonal Frequency Division Multiplexing,TDS-OFDM)系统为基础研发的地面数字电视多媒体广播(Digital Terrestrial Multimedia Broadcast,DTMB)传输系统得到了广泛应用。然而,DTMB信号在传输过程中易受环境噪声及外界干扰等因素的影响,导致信号传输不稳定。为解决这一问题,急需对DTMB信号传输系统的信道进行准确估计。在深入研究基于TDS-OFDM技术的DTMB信号传输系统工作原理的基础上,提出一种基于特征值分解(Singular Value Decomposition,SVD)算法的DTMB自适应信道估计算法,并通过仿真实验从算法实现难易度、工作性能等方面对所提算法与传统信道估计算法的优劣势进行了对比分析。In recent years,with the rapid development of digital television technology,China's Digital Terrestrial Multimedia Broadcast(DTMB)transmission system developed on the basis of Time Domain Synchronous Orthogonal Frequency Division Multiplexing(TDS-OFDM)system has been widely used.However,DTMB signals are easily affected by environmental noise and external interference during transmission,resulting in unstable signal transmission.In order to solve this problem,accurate estimation of the channel of DTMB signal transmission system is urgently needed.Based on the in-depth study of the working principle of DTMB signal transmission system based on TDS-OFDM technology,an adaptive channel estimation algorithm based on Singular Value Decomposition(SVD)is proposed,and the advantages and disadvantages of the proposed algorithm compared with the traditional channel estimation algorithm are investigated from the aspects of algorithm realization dfficulty and performance through simulation experiments.

关 键 词：时域同步正交频分复用(TDS-OFDM) 地面数字电视多媒体广播(DTMB) 传输系统 信道估计 自适应算法 

分 类 号：TP311.1[自动化与计算机技术—计算机软件与理论]