Direct blind equalization for transmitter induced cyclostationarity

Abstract

Cyclostationarity in a communications signal enables the use of second-order statistics for blind equalization. In this paper, we present a second-order subspace based blind channel estimation technique which introduces cyclostationarity at the transmitter. In contrast with most existing second-order cyclostationary methods which introduce cyclostationarity by fractional-sampling, the proposed method does not require any assumptions on the channel zero locations. Furthermore, the proposed method extends existing transmitter-induced cyclostationary methods to allow for colored random or even deterministic input.