摘要
提出一种基于二阶采样（Second-ordersampling）技术的带通信号免混频全数字化正交解调方法．该方法直接对中频带通信号进行二阶采样，然后通过线性移相数字滤波器获得正交的两路基带信号，该方法可省略正交混频环节，与基于一阶采样技术的免混频正交解调方法相比，采样率的选择有更大的灵活性．
A mixer-free all digital quadrature demodulation method based on second-order sampling is proposed. This method makes esecond-order sampling of a bandpass signal directly, and produces quadrature basebands by passing the samples through linear-phase-shifting filters. Mixers are omitted in this method. Compared with the methods based on first-order sampling the method we proposed here has more freedom in the selection of sampling rates.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1999年第6期118-119,共2页
Acta Electronica Sinica
关键词
二阶采样
正交解调
相干检波
解调技术
Second-order sampling, Bandpass, IF sampling, Quadrature demodulate, Coherent detection
