Spatial compressive array processing scheme against multiple narrowband interferences for GNSS

Conventional spatial-based array processing technique requires a lot of large storage space and costly hardware implementations in an antenna array-based global navigation satellite system (GNSS) receivers. In this paper, the compressive sensing (CS)-based antenna array processing scheme is proposed to apply in anti-jamming GNSS receivers. The design criteria of CS matrix is to meet the restricted isometry property (RIP) conditions, and it is combined with discrete wavelet transform and Gaussian measurement matrix. The minimum variance distortionless response (MVDR) beamformer is used to null the interference and maintain the gain direction of desired signal and the proposed scheme reduces a large computation load in MVDR. Under the use of 3×3 antennas with uniform rectangular array under 1/2 wavelength spacing, the anti-jam performance is achieved to 40 dB under two present interferences. The overall computation performance can enhance by 1.2~1.4 times.