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.
文章在多径信道下，提出了一种基于RAKE接收机的空时分组编码(STBC)方案。
This paper presents a RAKE-based STBC scheme used in multi-path fading environment.
只有对信号在多径衰落信道中所经历的衰落做出准确实时的估计，系统才可以使用能够提高接收机误比特率性能的相干检测。
Communication systems can enhance their BER performance by using coherence detection only when they could make precise and real-time estimation of fading coefficients of multipath channel.
经过理论分析和IEEECM 3多径信道仿真，结果表明该接收机的误码率性能优于一般A TR接收机。
This receiver is analyzed in theory and simulated in IEEE CM3 multipath channel. The results show that it has a better bit-error-ratio performance compared with a conventional ATR receiver.
经过理论分析和IEEECM 3多径信道仿真，结果表明该接收机的误码率性能优于一般A TR接收机。
This receiver is analyzed in theory and simulated in IEEE CM3 multipath channel. The results show that it has a better bit-error-ratio performance compared with a conventional ATR receiver.
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