北京大学学报（自然科学版）2006，Vol.42Issue(5)：658-661,4.
快衰落信道下OFDM系统符号长度的最优化设计
The Optimum Symbol Length Design for Wireless OFDM over Fast Fading Channels
马猛 1杨玉丽 1焦秉立1
作者信息
- 1. 北京大学信息科学技术学院电子学系,北京,100871
- 折叠
摘要
Abstract
The analysis of OFDM system over time-variant channel is often performed under the assumption that the channel remains constant within one symbol period, however this is not always true for any situations. With the higher carrier frequency, faster movement speed and longer symbol duration, the Inter-Carrier Interference (ICI) caused by Doppler spread will be increased. The authors analyze the Maximum Achievable Data Rate (MADR) and SINR (Signal to Interference and Noise Ration) for time-frequency selective fading channels when the orthogonality of sub-carriers is destroyed by the Doppler spread. The authors also find out the optimal symbol durations to maximize the MADR and SINR. Numerical results corroborate the theoretical findings.关键词
多普勒效应/容量/载波间串扰/Rayleigh 信道/OFDMKey words
Doppler spread/capacity/ICI/Rayleigh channel/OFDM分类
信息技术与安全科学引用本文复制引用
马猛,杨玉丽,焦秉立..快衰落信道下OFDM系统符号长度的最优化设计[J].北京大学学报（自然科学版）,2006,42(5):658-661,4.
