双/多基地综合脉冲孔径地波雷达的信道化接收技术研究

双/多基地综合脉冲孔径地波雷达在发射站为多载频信号同时辐射,在接收站综合形成发射方向图之前需要对各发射信号分量进行分离.尽管采用数字混频和低通滤波器组可以对各发射分量进行分离,但运算量太大,难以实时实现.为此提出采用多相滤波器组信道化接收技术,设计该雷达的多相滤波器组信道化接收机.这种多相滤波器组信道化接收机与低通滤波器组信道化接收相比,运算量减少N²倍(N为信道数).最后给出了该雷达试验系统的实测数据处理结果,验证了这种多相滤波器组信道化接收技术在该雷达信号处理中的有效性.

Channelized Receiver for Bi/Multi-Static Synthetic Impulse and Aperture Ground-Wave Radar

In bi/multi-static synthetic impulse and aperture ground-wave radar,multiple frequency-carrier signals are transmitted simultaneously by multiple antennas in the transmitting station.The returns of different carrier-frequency must be separated from one another before transmitting pattern is synthetically formed in the receiving station.Such a problem can be solved by adopting digital mixers and low-pass,but the amount of operation in this way is too large for real-time realization.Therefore,this paper presents the technique of channelized receiver based on multiphase filter bank.Compared with low-pass filter bank channelized receiver,the amount of operation of the multiphase filter bank(receiver) can be reduced by N~2(N is the number of channels).At last,the results of realdata processing with experimental system of the radar are given,which will verify the validity of this technique in such a radar system.