Title :
On the asymptotic SIR of (WL)MMSESIC for imperfect CSI
Author :
Lampe, Alexander ; Huber, Johannes B.
Author_Institution :
LIT, Erlangen-Nurnberg Univ., Erlangen, Germany
Abstract :
Using Wiener filters for pilot symbol aided channel estimation, and MMSE interference suppression filters, single user decoding as well as successive interference cancellation (SIC) for multiuser detection of QPSK data symbols, the SIR at the MMSE filter outputs is given for DS-CDMA systems with random spreading sequences in the asymptotic regime accounting for the exact covariance matrix of the channel estimation errors. Based on this, equivalent results for BPSK signaling applying widely linear (WL) MMSE interference suppression filters, single user decoding and SIC are solved.
Keywords :
Rayleigh channels; Wiener filters; channel estimation; code division multiple access; covariance matrices; interference suppression; least mean squares methods; multiuser detection; quadrature phase shift keying; spread spectrum communication; BPSK signaling; DS-CDMA systems; MMSE interference suppression filters; QPSK data symbols; Rayleigh fading channels; SIC; SIR; Wiener filters; asymptotic SIR; covariance matrix; imperfect CSI; multiuser detection; pilot symbol aided channel estimation; random spreading sequences; single user decoding; successive interference cancellation; widely linear filters; Channel estimation; Covariance matrix; Decoding; Interference cancellation; Interference suppression; Multiaccess communication; Multiuser detection; Quadrature phase shift keying; Silicon carbide; Wiener filter;
Conference_Titel :
Information Theory, 2002. Proceedings. 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7501-7
DOI :
10.1109/ISIT.2002.1023720
