Asynchronous Interference Cancellation with an Antenna Array
15 September 2002
Abstract - The antenna array asynchronous interfer- ence cancellation problem is addressed by means of semi- blind algorithms with projections to the nite alphabet. It is observed that the conventional Least Squares (LS) solution estimated over the training interval may not be suitable for initialization of the iterative semi-blind schemes in the case of asynchronous interference.
The simulation results in an OFDM HIPERLAN/2 environ- ment are presented, which demonstrate that contradic- tory to the synchronous interference case a modied LS initialization based on the autocorrelation matrix esti- mated over the whole burst of data outperforms the con- ventional LS initialization for the high interference level. tion problem.