Improved anti‐jamming scheme for direct‐sequence spread‐spectrum receivers
Weihua Dai, Chunjie Qiao, Yueke Wang, Chao Zhou · Electronics Letters · 2015
An anti‐jamming scheme on the base band instead of the intermediate frequency (IF) is proposed to improve the anti‐jamming capability of direct‐sequence spread‐spectrum (DSSS) receivers. For time–frequency domain technology, both the residual jamming energy and the unexpected loss of signal energy resulting from inaccurate jamming rejection would reduce the capability of signal acquisition. The scheme of detecting jamming by FFT and rejecting jamming by notch filters on the base band is exploited to improve the accuracy of jamming rejection. Monte Carlo simulation results show that the proposed scheme could enhance the anti‐jamming capability of DSSS receivers.