A fast blind sequence estimation in digital communications

Author

Torlak, Murat ; Hansen, Lars K. ; Xu, Guanghan

Author_Institution

Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA

Volume

1

fYear

1997

fDate

2-5 Nov. 1997

Firstpage

833

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 Hansen and Xu (see Proc. ICASSP´96, p.1085-88, 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; equalisers; error statistics; fading; multi-access systems; multipath channels; phase shift keying; sequential estimation; BER; BER performance; BPSK; FIR-MIMO systems; antenna arrays; blind joint space-time equalization; fast blind sequence estimation; fast sequential-estimation algorithm; finite alphabet; geometric observation; geometric properties; multi-user signals separation; multipath channels; multipath fading; multiple digital co-channel communication signals; simulation results; speed; Antenna arrays; Bit error rate; Blind equalizers; Deconvolution; Digital communication; Fading; MIMO; Source separation; Visualization; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems & Computers, 1997. Conference Record of the Thirty-First Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-8186-8316-3

Type

conf

DOI

10.1109/ACSSC.1997.680560

Filename

680560