短波信道对OFDM信号的影响研究  

Study on the Effect of HF Channel for OFDM Signals

作　　者：任雪峰[1] 逄勃[1] 樊龙龙 

机构地区：[1]海军驻南京地区雷达系统军事代表室,南京210003 [2]海军驻晋东南地区军事代表室,太原030027

出　　处：《舰船电子工程》2012年第5期74-77,共4页Ship Electronic Engineering

摘　　要：短波信道的多径效应,频率偏移,非线性干扰等因素会降低短波OFDM通信的性能。文章通过理论推导,分析了短波信道对OFDM技术的影响。通过计算机仿真实际的短波通信实验,验证了分析的结果。High-frequency（HF） communication plays an important role in military communications, because of simple equipment, low- cost good flexibility and non-destroyed performance. Nowadays, high speed, intelligentize and cyberization are the development direction of HF communication. Orthogonal frequency division multiplexing（OFDM） technique adapts for the development of HF communication. Be cause it has the character of high bandwidth efficiency, high ability of against multipath and high bandwidth spread ability. But OFDM sys tern has the sensitivity to frequency offset, and the difference of frequency between transmitter and receiver and the Doppler shifts of channel are ubiquitous in the HF communication. The multipath, frequency offset, and nonlinear disturbance in the HF channel will deteriorate the OFDM communication performance. The effect of HF channel for OFDM signals is analyzed by theory demonstrating. The analysis result is validated based on the Computer simulations and HF OFDM communication experiment.

关 键 词：OFDM 短波信道 同步 通信实验 

分 类 号：TN925[电子电信—通信与信息系统]