Polyphase array FFT demultiplex for broadband satellite communication networks

Bo Niu, K. Yi, Chun-yan Gu
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引用次数: 0

Abstract

A FDMA/TDM multiple access/multiplexing system based on onboard FDMA-TDM conversion is believed to be very attractive for VSAT satellite communication networks, but it has two fatal drawbacks, i.e. its on board processing equipment is too complex and it lacks flexibility in applications. This paper presents a new form of FDMA/CWTDM multiple access/multiplexing included in a Chinese patent, which can overcome the two drawbacks and suit broadband applications, where CWTDM means continuous wave time division multiplexing. In an onboard FDMA-CWTDM converter, how to implement the frequency-division demultiplexer is the most important issue. It is desired that its frequency band should be as wide as possible and the number of its channels be as great as possible. This paper emphasizes the research and design for such a demultiplexer. For the purpose, a polyphase array FFT demultiplexer module has been successfully developed based on FPGA design. Theoretical analysis and experimental results show that the demultiplexer module has very good performance and can find wide application.
宽带卫星通信网络的多相阵FFT解复用
基于板载FDMA-TDM转换的FDMA/TDM多址/复用系统被认为是非常有吸引力的VSAT卫星通信网络,但它有两个致命的缺点,即板载处理设备过于复杂,在应用中缺乏灵活性。本文提出了一种新型的FDMA/CWTDM多址/复用技术,该技术克服了这两个缺点,适合宽带应用,其中CWTDM意味着连续波时分复用。在板载FDMA-CWTDM转换器中,如何实现频分解复用器是最重要的问题。期望其频带尽可能宽,信道数量尽可能多。本文着重研究和设计了这样一种解复用器。为此,成功开发了一种基于FPGA设计的多相阵FFT解复用模块。理论分析和实验结果表明,该解复用模块具有良好的性能,具有广泛的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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