W频段卫星通信中的恒包络OFDM技术

Constant Envelope OFDM Technology of W Band for Satellite Communication[HS)]

摘要:

随着传统的C频段,Ku频段,Ka频段的逐渐饱和,人们开始研究特高频段(EHF)的卫星通信频段,W频段(75~110 GHz)卫星通信凭借更高的传输速率和天线增益等优势受到了人们的关注;总结了W频段卫星通信的优缺点,结合卫星通信频谱效率问题介绍了在卫星信道中采用正交频分复用(OFDM)传输方式,针对OFDM高峰均比的问题研究了恒包络OFDM,对恒包络OFDM的性能进行了分析;分析表明恒包络OFDM解决了OFDM带来的高峰均比问题,但性能受调制方式严重影响,最后结合其发展现状展望了恒包络OFDM发展的趋势。

Abstract:

With the saturation of C, Ku and Ka frequency channel, people begin to study the higher frequency channel for satellite communication, and W band for satellite communication has been paid more attention because of its high transmission rate and antenna gain etc. The advantages and disadvantages of W band satellite communication are summarized, and the OFDM transmission technology in the satellite channel based on the efficiency problem is introduced. According to the high peak-to-average radio of OFDM, constant envelope OFDM is studied and its performance is analyzed. The analysis result is that constant envelope OFDM solve the problem of high peak-to-average, however, it is effected by the modulation ways. Finally, its development trend is put forward combined with the development situation . 