多频噪声双基地MIMO雷达相参信号处理算法

A Coherent Processing Algorithm for Multi-Frequency Signals Based on Bistatic Noise MIMO Radar

多频噪声多输入多输出(MIMO)雷达各发射天线发射不同频率噪声信号,所以同一目标的不同频率回波有不同的多普勒频率。为了将各频率回波信号进行相参合成处理,充分发挥MIMO噪声雷达在目标检测性能上的优势。基于Keystone变换技术,提出一种适合多频噪声MIMO雷达的相参处理算法。所提算法对不同频率的回波信号进行重采样,即Keystone变换,使得不同频率的回波具有相同的多普勒频率,然后进行相参合成检测处理。

Since the transmitted signals from the multi-frequency signals based on bistatic noise multi-input multi-output (MIMO) radar have different frequencies, the Doppler frequencies of received signals are different. Therefore, the coherent processing method should be studied for the full use of the advantages of bistatic noise MIMO radar. In this paper a coherent processing algorithm for multi-frequency signals based bistatic noise MIMO radar is introduced based on the Keystone transformation technique. The proposed method uses the Keystone transformation to resample the received multi-frequency signals. The resampled signals have the same Doppler frequency, and then, the coherent processing can be used for target detection.