数字信道化的级联设计

Design of Serial Digital Channelization

在宽带信号侦察中数字信道化是一个极其重要的环节。当侦察的信号带宽非常宽,需要的数字信道化个数很大时,用一级信道化实现非常困难。其中,大点数、高速率的DFT设计和硬件实现是一个最突出的难点。针对这个问题,提出了一种数字信道化的级联实现结构,把实信号的数字信道化与复信号的数字信道化级联起来,能够大大降低设计难度,并且这种基于模块化的设计便于工程实现。仿真结果证明,这种方法能够有效实现实信号的无盲区、抗混叠的频谱恢复。

Digital channelization plays a very important role in the detection of broad-band signal.When the signal band is very broad and the number of channel is rather large,it is quite difficult to realize the channelization through only one step.Among these,the design and hardware implementation of the large point-number and rapid DFT is the most prominent difficulty.Aiming at this problem,serial channelization architecture is proposed,which could make a serial connection between real signal digital channelization and complex signal digital channelization,thus to greatly reduce the design complexity.In addition,this design based on the module is very convenient to engineering implementation.Simulation result shows that the proposed method could efficiently accomplish the spectrum rebuilding without any blind zone and overlap.