Re-configurable semi-blind cancellation of asynchronous interference with an antenna array

The antenna array asynchronous interference cancellation problem is addressed by means of semi-blind algorithms with projections to the finite alphabet. It has been observed that the conventional least squares (LS) solution estimated over the training interval may not be suitable for initialization of iterative semi-blind schemes in the case of asynchronous interference. Unlike the synchronous case, a modified LS initialization based on the autocorrelation matrix estimated over the whole burst of data outperforms the conventional LS initialization for the high interference level. We propose a re-configurable receiver which exploits on-line selection of the initialization. Its efficiency is demonstrated in TDMA and OFDM environments.

[1]  A.J. Paulraj,et al.  Space-time processing for wireless communications , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[2]  Constantinos B. Papadias,et al.  Asynchronous interference cancellation with an antenna array , 2002, The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[3]  Luis Lopes,et al.  On the application of uplink optimum combining to base station reception , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[4]  Klaus I. Pedersen,et al.  Antenna Arrays and Space Division Multiple Access , 2002 .

[5]  M. C. Wells.  Increasing the capacity of GSM cellular radio using adaptive antennas , 1996 .

[6]  A. M. Kuzminskiy,et al.  Space-time filtering with suppression of asynchronous co-channel interference , 2000, Proceedings of the IEEE 2000 Adaptive Systems for Signal Processing, Communications, and Control Symposium (Cat. No.00EX373).

[7]  Single Input Multiple Output techniques for , 2001 .

[8]  J. Karlsson,et al.  Interference rejection combining for GSM , 1996, Proceedings of ICUPC - 5th International Conference on Universal Personal Communications.