Investigation of correlation effect between the signal and interference in GSC/LMS adaptive beamformer

We investigate the effect of correlation on the performance of the generalized sidelobe canceller (GSC). The analysis yields an explicit expression for the signal-to-interference-plus-noise ratio (SINR) at the output of GSC in terms of the different parameters affecting the performance, including the interference-to-noise ratio (INR), the signal-to-noise ratio (SNR), the spatial correlation, and the correlation between the desired and interfering signal. It can provide us insight of how the correlation between the desired signal and the interference can severely degrade the performance of the GSC system.