Signal processing improvements for smart antenna signals in IS-95 CDMA

Author

Affes, Sofiiène ; Mermelstein, Paul

Author_Institution

INRS Telecommun., Ile des Soeurs, Que., Canada

Volume

2

fYear

1998

fDate

8-11 Sep 1998

Firstpage

967

Abstract

We propose an efficient signal processing technique to exploit smart antennas in IS-95 CDMA. It integrates decision feedback identification (DFI) and new decision variables into the adaptive antenna beamforming scheme. These two features permit implementation of a coherent detection on the uplink without a pilot and spatio-temporal maximum ratio combining (MRC). With two antennas and nonselective fading, the additional gain in SNR achieved by either feature is as significant as the gain obtained by simple antenna beamforming over diversity combining. Up to a 2 dB performance advantage is obtained in selective fading as compared to simple beamforming

Keywords

adaptive antenna arrays; adaptive signal detection; adaptive signal processing; array signal processing; cellular radio; code division multiple access; diversity reception; fading channels; feedback; receiving antennas; IS-95 CDMA; SNR; adaptive antenna beamforming; coherent detection; decision feedback identification; decision variables; diversity combining; nonselective fading; signal processing; smart antenna signals; spatio-temporal maximum ratio combining; subspace tracking array-receiver; uplink; Adaptive signal processing; Antennas and propagation; Array signal processing; Correlators; Diversity reception; Fading; Feedback; Interference; Multiaccess communication; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on

Conference_Location

Boston, MA

Print_ISBN

0-7803-4872-9

Type

conf

DOI

10.1109/PIMRC.1998.734705

Filename

734705