Novel receiver architectures for mobile communications

Abstract

In digital communications, especially for mobile communications, the channel response needs to be estimated to maintain good system performance. However, the channel characteristics are usually unknown and time varying. In this thesis, novel receiver architectures and adaptive algorithms are developed to determine and track the channel characteristics as they change. They incorporate a new class of variable step-size least mean square (VSLMS) adaptive algorithms with good tracking properties developed in this thesis. With the great interest in turbo codes for commercial cellular mobile communications such as WCDMA and cdma2000, the proposed receiver architectures are successfully employed in channel estimation for turbo decoding in Rayleigh fading channels.