NDLI: Maximal ratio combining with channel estimation errors

Content Provider	IEEE Xplore Digital Library
Author	Tomiuk, B.R. Beaulieu, N.C. Abu-Dayya, A.A.
Copyright Year	1995
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Queen's Univ., Kingston, Ont., Canada (Tomiuk, B.R.; Beaulieu, N.C.; Abu-Dayya, A.A.)
Abstract	An ideal coherent maximal ratio (MR) combiner multiplies the signals on all the incoming channels by the complex conjugate of their complex channel gains and then sums the resultant products to provide the optimum combined signal. However, the channel gains can not be estimated perfectly in any practical system. Thus, system performance will be degraded because there will be an error in the estimation of the combiner weighting factors in realistic combiners. In the paper closed form results are obtained for the bit error rates (BER) of MFSK, MPSK (M=2,4,8) and MDPSK (M=2,4) using imperfect MR combining in Rayleigh fading. These results are used to approximate the BER performance of equal gain (EG) combining with imperfect co-phasing. The MFSK results are also compared with those of the optimum non-coherent square-law (SL) combiner to determine how good channel estimation must be to surpass the performance of the optimum non-coherent combiner.
Starting Page	363
Ending Page	366
File Size	308762
Page Count	4
File Format	PDF
ISBN	0780325532
DOI	10.1109/PACRIM.1995.519544
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-05-17
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Diversity reception Channel estimation Bit error rate Frequency shift keying System performance Degradation Rayleigh channels Performance gain Fading Gallium nitride
Content Type	Text
Resource Type	Article

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