Title :
A fast blind source separation for digital wireless applications
Author :
Toriak, M. ; Hansen, L.K. ; Xu, G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Abstract :
The problem of blindly estimating multiple digital co-channel communication signals using an antenna array is studied in the presence of multipath fading. We develop a fast sequential-estimation algorithm for separating multi-user signals based on the geometric observation made by Kansen and Xu (see Proc. ICASSP´96, p.1085-8, Atlanta, GA, 1996). When the signals are constrained to a finite alphabet, it is possible to visualize the geometric properties of the problem, which can be exploited to sequentially extract the digital co-channel communication signals. We present simulation results comparing the speed and BER performance with different methods
Keywords :
MIMO systems; array signal processing; digital radio; direction-of-arrival estimation; error statistics; fading; multipath channels; sequential estimation; transient response; BER performance; FIR-MIMO systems; antenna array; blind estimation; digital wireless applications; fast blind source separation; fast sequential-estimation algorithm; finite alphabet; geometric properties; multi-user signals; multipath fading; multiple digital co-channel communication signals; simulation results; speed; Antenna arrays; Bit error rate; Blind equalizers; Blind source separation; Context; Fading; MIMO; Multipath channels; Source separation; Visualization;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.679571
