Focused on several kinds of interferences in the partial discharge(PD) signals of transformer,wavelet packet based method is proposed to suppress the white noise;the digital trap filter is designed to suppress the periodical narrow-band interference.

As periodic narrowband interference is inevitable in the gas insulated switchgear (GIS) partial discharge (PD) ultra-high-frequency (UHF) detecting system, such interference should be suppressed during field detection.

Research of GPS receiver acquisition performance under narrowband jamming;

Finally suppression of the narrowband jamming in the subspace after it is projected is discussed too.

Models of narrowband jamming are analyzed and simulated in this paper.

Novel suppression method for narrow-band interference in GPS receiver;

Technology of narrow-band interference suppression in transform domain communication system based on wavelet packet;

New method of narrow-band interference suppression;

Adaptive nonlinear filters for narrowband interference suppression in DS-CDMA systems;

Algorithm of adaptive rejection of narrowband interference in CDMA communication system based on wavelet packet;

Blind narrowband interference suppression in asynchronous CDMA systems;