宽带强干扰中弱信号的检测

Detection of weak signal in wideband strong interference

提出了一种检测宽带强干扰中弱信号的实现方法。利用FFT将宽带信号分解成为若干个窄带信号,对每一个窄带信号,先利用MVDR(最小方差无失真响应)方法进行波束形成,再通过干扰抑制系统有效地抑制弱信号附近空间不同方位的强干扰,完成指定弱信号的检测。

An implementation of the weak signal detection in the wideband strong interference is proposed. The wideband signal is decomposed in the frequency domain into multiple narrowband signals by using the fast response transform (FFT). For each narrowband signal the multiple MVDR (minimum variance distortionless response) beams are formed. Then multiple interferences coming from the neighborhood of the target direction differently are effectively suppressed and the weak signal is detected by interference suppression system.