全数字带内同频道FM广播系统的系统级仿真建模  

System Level Simulation Modeling of All Digital In-band On-channel FM Radio System

作　　者：王定[1] 余宁梅[1] 刘昌龙[1] 

机构地区：[1]西安理工大学电子工程系,西安710048

出　　处：《系统仿真学报》2007年第1期59-62,共4页Journal of System Simulation

摘　　要：研究了适用于全数字FM广播系统的带内同频道基带传输软件仿真平台。在分析比较了多种信道纠错、调制方式和信道估计的前提下,应用误比特率和主观音频质量的对应关系,并综合考虑实现复杂度和运算量,对系统性能进行了快速评定,还讨论了同步和提高仿真速度的方法。仿真结果表明,对于城市拓扑和乡村拓扑环境,采用332ms交织深度、缩减RS码和1/2码率的删余卷积码构成的串行级联卷积码、16QAM调制及1/32保护时隙的系统方案具有优良性能。A software platform was described which simulated a in-band on-channel baseband transmission for the all digital FM radio system. After comparing and analyzing kinds of channel corrected, modulation and channel estimation, and utilizing correlation of bit error ratio and subjective audio quality and considering the realization complexity and computation, rapid assessment of system capacity could be performed, and synchronization and accelerating the simulation were also discussed. The simulation results show that the scheme with time interleaving depth of 332ms for Serial Concatenated Convolutional Code （SCCC）, 16QAM modulation and 1/32 guard interval duration could get better capacity.

关 键 词：数字音频广播 带内同频道 正交频分复用 信息分集 拓扑模型 Matlab仿真 

分 类 号：TN925.93[电子电信—通信与信息系统] TP393.17[电子电信—信息与通信工程]