Novel MLSE Interference Canceller with an APC Circuit that Compensates for Phase Rotation of Interference Signals

Abstract

We propose a novel interference canceller with an automatic phase control (APC) circuit that compensates for the phase error of interference signals. The proposed APC circuit estimates and compensates for the phase rotation of interference signals, enabling the proposed interference canceller with APC to achieve high BER performance. We use a maximum likelihood sequence estimation (MLSE) interference canceller for fixed wireless access (FWA) co-channel interferences. Degradations of signal replica accuracy incur a BER performance penalty. The novel APC circuit, which uses a simple estimation algorithm, can effectively compensate for frequency offset and phase rotation. Computer simulations show that our proposed interference canceller improves BER performance.