一种宽带数字信道化接收及发射系统

A Wide-Band Digital Channelization Receiver and Transmitter System

数字信道化接收及发射技术应用于宽带系统中,具有较好的多信号处理能力、较高的灵敏度。基于此,提出一种宽带数字信道化接收及发射的实现方法:在多相结构中,采用互质分解的DFT,可节省FPGA片内乘法器资源;对重构滤波器进行优化,减少信道交叠部分对信号重构的影响;每个信道可独立设置门限和独立关断,可抑制背景信号。

The technologies of digital channelized receiving and transmitting are applied in the wide band system.It not only has the ability of multi-signal processing,but also has high sensitivity.A method of wide-band digital channelized receiver and transmitter is presented:in poly-phase structure,the coprime DFT is employed to minimize the multipliers in FPGA;impaction of the overlap of adjacent channels in signal reconstruction is decreased over optimizing reconstruction filter;each channel’s threshold can be set and each channel can be closed,the background signal is blocked.