基于频域采样技术的软件无线电接收机

A Software Radio Receiver Based on the Rrequency-domain Sampling

目前软件无线电面临的一个难题是如何对高工作频带内的射频信号进行直接模/数转换。利用频域采样技术提出了一种接收信号进行处理的方法,并用数学理论证明了他的可行性,最后还给出了软件无线电接收机模型。其关键思想是提取接收信号的频域成份,然后在频域中对信号进行处理。这种方法大大降低了A/D转换器的要求,对当前微电子工艺下的软件无线电系统设计有很大的理论意义和实用价值,而且克服了传统Rake接收机的一些缺点,特别适合于多径丰富的无线环境。

Currently,a major challenge of software radio is how to directly implement A/D/A converters of the RF signal, in this paper,we propose a new approach to process received signals in the frequency-domain. The key idea for the proposed method is to extract the frequency components of the received signal and to perform signal processing in the frequency domain. The proposed receiver architecture relaxes the requirements of analog- to - digital converters, It also shows its values both in theory and practice of software radio under current electronic technology ,and overcomes the drawbacks of traditional Rake receiver,so it is highly suitable for a multi-path rich wireless environment.