Interference cancellation using the Gibbs sampler

This paper introduces a new method of interference cancellation for the base station in a CDMA system that is based on the Gibbs sampler. This interference cancellation method greatly reduces the degradation caused by multiuser interference from other users in a cell. The performance of the Gibbs sampler interference canceller is compared to the performance of a three-stage partial parallel interference canceller and is shown to have a gain of 0.6 dB at a raw BER of 10% (vehicular environments) and a gain of 2.8 dB at a raw BER of 1% (pedestrian environments) in an AWGN channel. This will result in capacity gains of 15% and 90%, respectively. Using the Gibbs sampler interference canceller a performance within 0.5 dB of the single user bound can be achieved.