基于OFDM的DRM系统性能分析

基于OFDM的DRM系统性能分析

董国锋，陈涤，邵常勇

山东大学信息科学与工程学院，山东济南250100

收稿日期:2005-11-01 修回日期:2005-12-31 出版日期:2006-10-24 发布日期:2006-10-24
通讯作者: 董国锋

Analysis of DRM system performance based on OFDM

DONG Guo-feng, CHEN Di and SHAO Chang-yong

School of information Science and Engineering， Shandong Univ.， Jinan 250100， Shandong， China

Received:2005-11-01 Revised:2005-12-31 Online:2006-10-24 Published:2006-10-24
Contact: DONG Guo-feng

摘要/Abstract

摘要： 结合DRM信道，研究了OFDM系统总的子载波数目N与信道间干扰ICI及信道信息速率R之间的关系，验证了通过选取合适的N值，不仅可以满足系统R的要求，而且可以有效的克服ICI的影响. 同时仿真分析了DRM系统的信噪比R(S/N)与信道时延τ和路径增益ρ之间的关系，证明了采用合适的保护间隔可以有效的克服符号间干扰ISI.

关键词: 正交频分复用, 数字调幅广播, 符号间干扰 , 信道间干扰

Abstract: Based on DRM channel, the relation between the total number of subcarrier (N) and the other two key parameter of OFDM system: interchannel interfere (ICI) and the channel bitrate (R) is investigated. The analysis shows that the appropriate N can not only satisfy the requirement of R, but also have high resistance to the ICI. Then simulation analyzes the relation between the R(S/N) ratio of the DRM system and channel delay (τ) as well as the gain of multipath (ρ), proving that appropriate guard interval has great immunity to the ISI.

Key words: intersymbol interference , interchannel interference, digital radio mondiale, orthogonal frequency division multiplexing

中图分类号:

TN911

董国锋,陈涤,邵常勇 . 基于OFDM的DRM系统性能分析[J]. J4, 2006, 41(2): 131-134 .

DONG Guo-feng,CHEN Di and SHAO Chang-yong . Analysis of DRM system performance based on OFDM[J]. J4, 2006, 41(2): 131-134 .

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