Journal of VLSI Signal Processing Systems
Random matrix theory and wireless communications
Communications and Information Theory
IEEE Transactions on Communications
Multiuser detectors for large CDMA random access systems over Rayleigh fading channels
Wireless Communications & Mobile Computing
Hi-index | 754.84 |
We derive the asymptotic signal-to-interference ratio (SIR) of the decorrelator in the large system limit, both for the case in which the number of users exceeds the spreading gain and for the case in which the number of users is less than the spreading gain. We show that, contrary to what is claimed by Tse and Hardy (see ibid., vol.45, p.641-57, Mar. 1999) and by Tse and Zeitouni (see ibid., vol.46, p.171-188, Jan. 2000) when the number of users exceeds the spreading gain and the decorrelator is defined in terms of the Moore-Penrose pseudoinverse, the SIR does not converge to zero.