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Distributed detection for diversity reception of fading signals in noise

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1 Author(s)
Blum, R.S. ; Dept. of Comput. Sci. & Electr. Eng., Lehigh Univ., Bethlehem, PA, USA

A multiple-antenna diversity scheme is investigated for digital communications. Antenna observations are immediately quantized and sent to a fusion center. At the fusion center, the quantized observations are combined to form a final decision on which symbol was transmitted. The optimum reception scheme is described for the case where frequency-shift keying is employed and where slow Rayleigh fading and Gaussian additive noise are present. Two cases are studied. In the first case, an accurate estimate of the signal-to-noise ratio is available at each receiver. In the second case, estimates are not available. Results indicate that two- or three-bit quantizations may be most appropriate. Further, if binary decisions are made at each antenna, the performance may not improve if an estimate of the signal-to-noise ratio is available at each antenna or if two antennas are used instead of one

Published in:

Information Theory, IEEE Transactions on  (Volume:45 ,  Issue: 1 )

Date of Publication:

Jan 1999

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