摘要
针对宽带卫星通信星上可变带宽群分路,本文研究了一种基于FFT的群分路算法。本算法首先对输入信号做FFT,然后根据频谱分布分离出各路信号的离散谱,最后使用分裂基IFFT得到各路信号。计算机仿真表明,本算法在处理可变带宽信号群分路时,与滤波器组法和分析合成法相比,具有计算量小,容易在星上实现,任意带宽可变的优势。
This paper studies an algorithm based on FFT to flexible frequency -band group de - multiplexing of wideband satellite communication. This algorithm first has a FFT analysis of the in- put signal, and then de - multiplexes the input signal due to the distribution of the frequency, at last gets the different access signal using split- radix algorithm. The computer analysis proves that this algorithm have a low computational complexity, more dynamic frequency - band processing ability compared to the formers, and easy to realized on board when dealing with flexible frequency -band group de - multiplexing.
出处
《无线通信技术》
2010年第2期33-36,40,共5页
Wireless Communication Technology
关键词
可变带宽
群分路
FFT
flexible-bandwidth
group de-multiplexing
FFT
