1. 登录 | 注册 | 用户中心 | 关于平台 | 中国科学院
当前位置:成果展示 > 成果详情

CMMB信号抗多径性能的分析与仿真

  • [设施]:长短波
  • [期刊/会议名称]:时间频率学报
  • [摘要]:In this paper the anti-multipath performance of the CMMB(China Mobile Multimedia Broadcasting) signal is studied based on the CMMB system structure. The anti-multipath performance is derived in detail for the signals with or without CP(circular prefix), and the performance of CMMB system in case of typical dynamic multipath channel is simulated by using Matlab7.1. The results show that the CMMB system is powerful in resisting the multipath effect, and the bit error rate for receiving CMMB signal is improved by two orders of magnitude compared with that for receiving ordinary OFDM(orthogonal frequency division multiplexing) signal when the SNR is 30 dB, being helpful to improve the precision of navigation /positioning. Abstract:从CMMB(中国移动多媒体广播)体系结构入手,研究了CMMB信号抗多径性能。以信号中有、无循环前缀(CP)为例给出了抗多径性能的详细推导,通过Matlab7. 1对该系统在典型动态多径信道情况下的性能进行了仿真。结果表明:该系统有很强的抗多径能力,在信噪比为30 dB时接收CMMB信号与接收普通OFDM(正交频分复用)信号相比,误码率有2个量级的改善,有利于提高导航定位的精度。
  • [发表日期]:2012
  • [第一作者]:李俊俊
  • [第一作者单位]:国家授时中心
  • [通讯作者]:李俊俊
  • [通讯作者单位]:国家授时中心
  • [论文类型]:期刊论文
  • [期刊分类]:CSCD扩展版
  • [学科分类]:51050 通信技术
  • [影响因子]:
  • [关键词]:China Mobile Multimedia Broadcasting(CMMB); anti-multipath; circular prefix(CP); orthogonal frequency division multiplexing(OFDM); dynamic multipath channel
  • [卷号]:
  • [期号]:
  • [起止页码]:
  • [简介]: