基于π/4-DQPSK调制的UHF频段无线高速数据传输系统方案设计
System Design of the Wireless High-speed Data Transmission on UHF Band based on π/4-DQPSK
随着高速率无线通信需求的增长，单载波频域均衡（SC-FDE）以复杂度较低并且均衡效果较好为优势，已经作为一项重要的技术被许多通信系统用来消除多径信道带来的码间干扰。本文提出了一种在UHF频段基于π/4-DQPSK调制的SC-FDE系统设计方案，并研究了接收端的同步算法和信道估计算法，根据UHF频段不同时延和衰落特征建模仿真了瑞利衰落多径信道，并在此基础上对整个系统的性能进行了仿真。仿真结果表明，采用本文给出的同步算法和信道估计算法，频域均衡技术可以有效应对UHF频段的高速数据传输中出现的频率选择性衰落。?????
With the increasing demand of high-rate communication, SCFDE has become a significant technology which is used in many communication systems to eliminate the influence of ISI brought by multipath fading channel. This paper proposes a system design scheme based on π/4-DQPSK, and specifically study the synchronization algorithms and ways to estimate the channel information and SNR. Besides, the wireless Rayleigh fading multipath channels are modeled based on different delay and fading properties in UHF frequency. With them, the overall simulation of SCFDE system is made. And the results show that, with the algorithm in this paper, SCFDE technology can deal with the ISI in high-rate transmission with UHF frequency band well.
尹长川、高慧玲
无线通信通信
频域均衡UHFπ/4-DQPSK同步技术信道估计非线性
frequency-domain equalizationUHF bandπ/4-DQPSKsynchronizationchannel estimationnonlinearity
尹长川,高慧玲.基于π/4-DQPSK调制的UHF频段无线高速数据传输系统方案设计[EB/OL].(2014-11-26)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201411-510.点此复制
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