Single Antenna Cochannel Interference Cancellation in Asynchronous TDMA Systems

In this paper, a receiver based on an iterative algorithm for joint channel estimation and cochannel interference cancellation suitable for time-division multiple-access cellular radio systems is proposed. The receiver is blind with respect to the data of the interfering users and training-based w.r.t the data of the desired user and it is therefore referred to as semi-blind. As opposed to concurrent receiver structures, where the number of receiving antennas must exceed the number of cochannel interferers, the proposed receiver is suitable for just one receiving antenna, i.e., the proposed receiver is also suitable for the downlink. Simulations results are presented, which indicate that with just one receiving antenna and no oversampling the proposed receiver is able to operate at a signalto-interference ratio of 0 dB in asynchronous GSM networks given a single dominating interferer.