中频软件无线电接收机的设计与实现

Design and Implementation of the software defined radio receivers of intermediate frequency

文章通过对软件无线电基本理论的研究,得出一种多相滤波数字正交变换的中频软件无线电结构,A/D的采样频率只有原采样频率的一半,这样就降低了对采样器件的要求。为了降低后续DSP处理速度需求压力,文中利用FPGA实现了多相滤波数字正交变换结构的延迟滤波,证明了这种结构的正确性和可行性。

Based on the essential theory research of software defined radio, an intermediate frequency architecture of SDR receiver with ployphase filter digital orthogonal transform are brought out in the thesis and the sample frequency of ADC decrease a half. In order to decrease the speed press of DSP, use field programmable gate array（FPGA） to realize the delay filter and prove that the structure is right and feasible.