火力与指挥控制2018，Vol.43Issue(5)：121-124,4.DOI:10.3969/j.issn.1002-0640.2018.05.026
基于QPSK-OFDM系统的循环前缀长度优化设计
Optimal Design of Cyclic Prefix Length Based on QPSK-OFDM System
摘要
Abstract
Different length of cyclic prefix influences BER performance in OFDM system. The system power loss and data rate lose has been comprehensively analyzed. An optimization designing method has been proposed based on the principle of minimum BER with cyclic prefix linear superposition method in a subcarrier for QPSK modulation technology. Simulation shows that:as the length of CP became longer by linear superposition,the performance of BER is reduced and then linear increased. When the length of CP is about 20 豫 of the OFDM symbol length,a minimum BER value will be generated,while the length of CP is optimal. Moreover,the system has the strongest ability to resist multipath interference.关键词
正交频分复用/循环前缀/误码率/多径干扰Key words
OFDM system/cyclic prefix/bit error rate/multipath interference分类
信息技术与安全科学引用本文复制引用
赵梓旭,宋小庆,魏有财,王慕煜..基于QPSK-OFDM系统的循环前缀长度优化设计[J].火力与指挥控制,2018,43(5):121-124,4.基金项目
国家自然科学基金(51507190) （51507190）
陆军装备部重点实验室基金资助项目(2014zx28) （2014zx28）
