Design and analysis of low-complexity interference mitigation on vector channels

Linear multiuser detectors for vector channels with crosstalk are approxima ted by weighted matrix polynomials. The weight optimization problem is over come using convergence results from random matrix theory. The results are a lso extended to receivers with subsequent successive decoding. In the case of subsequent successive decoding, a novel low-complexity imple mentation is found for the first-order approximation that is based on match ed filter banks only and does not require matrix algebra. Spectral efficien cy is obtained analytically and found to be fairly close to optimum. The paper Is focussed on multiuser detection for CDMA, but the results can be easily extended to communication via antenna arrays.