为了实现GMSK信号解调，接收机中dsp实现了调制信号的误差频谱估计、位同步恢复及译码。
To demodulate GMSK signal, DSP is used in receiver to achieve error spectrum estimation, bit synchronization recovery and decode.
讨论了卫星导航中BOC调制解调的原理和实现方法，并着重研究了接收机的码跟踪技术。
This paper discusses the theory and the realization approach of BOC modulation and demodulation in satellite navigation system, and focuses on the BOC code tracking technology.
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.
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