Pilot-channel aided successive interference cancellation for uplink WCDMA systems over multipath fading channels

Abstract

In this paper, we examine the performance of the pilot-channel aided successive interference cancellation scheme in asynchronous WCDMA systems over multipath fading channels. Three types of cancellation method are compared where the cancellation order is decided based on either average power or instantaneous measured received signal strength with various updating rate. The scheme performs pilot-channel signal removal before data detection to alleviate the interferences from other users' pilot channels and thus can achieve better performance on user data detection. With the investigation and comparison through computer simulations, the scheme with three types of ordering method are shown to perform variously due to different grouping interval and power distribution ratio over both AWGN and Rayleigh fading channels.