Multistage MIMO approach to interference cancellation

In this work multistage MIMO equalization and source separation method is adapted to operate as a successive interference cancellation (SIC) scheme to improve the quality of received signal in a high interference environment. In a 3-stage setup, after capturing the signal of interest (SOI), interference is estimated and cancelled at second stage. After cancellation of the interference, the last stage of equalization recaptures the SOI with better quality due to higher SINR at its input signals. We have shown that using this method with successful equalization at the first stage, we are able to achieve approximately 10 dB cancellation gain when interferer is as strong as signal(SIR=0) and SNR is 35 dB. A Rayleigh fading iid channel is used for simulation.

[1]  S. Barbarossa,et al.  Blind equalization using cost function matched to the signal constellation , 1997, Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136).

[2]  A. Cole-Rhodes,et al.  An adaptive blind equalizer with signal separation for a MIMO system transmitting QAM signals , 2008, MILCOM 2008 - 2008 IEEE Military Communications Conference.

[3]  David Wetherall,et al.  Interference Cancellation: Better Receivers for a New Wireless MAC , 2007, HotNets.

[4]  John J. Shynk,et al.  The constant modulus array for cochannel signal copy and direction finding , 1996, IEEE Trans. Signal Process..

[5]  D. Godard,et al.  Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems , 1980, IEEE Trans. Commun..