为了对软件无线电进行探索性研究，本论文主要研究了软件无线电接收机中的部分关键技术：包括数字下变频算法，多通道并行接收的信道化模型以及调制解调部分的实现。
In order to make a research on the software radio, this thesis focuses on key techniques for radio receiver including: DDC technology, the channelization model, modulation and demodulation algorithm.
水声信道多径参数的实时估计对于提高接收机性能有重要意义。
It is important to enhance receiver performance by real time estimating the multipath parameters of underwater acoustic channels.
本文研究和分析了在一般多径信道条件下，CD MA阵列接收机对于多址干扰和符号间串扰的联合抑制。
In this paper joint suppression of multiple access interferences and inter-symbol interferences by a CDMA array receiver is studied in multipath channels.
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