NDLI: CDMA performance improvement through bias reduction using optimized partial parallel interference cancellation factor

Content Provider	IEEE Xplore Digital Library
Author	Fawzy, A.N. Riad, M.M.
Copyright Year	2001
Abstract	In a CDMA system, the number of simultaneous users is a very important factor. So, a great number of researchers are interested in increasing the maximum available number of users for a given performance of a cellular system. To increase that number, multiple access interference (MAI) had to be cancelled. These cancellation techniques result in a bias term (BT) appearing in amplitude estimates after the cancellation process. The BT deviates the estimated values of amplitudes from their real mean, leading to a wrong decision. This paper introduces a new method to decrease the BT. Using the partial parallel interference cancellation (PPIC) factor, this factor is optimized against the bit error rate (BER). Also we show a comparison between BER of different types of sub-optimal receiver structures and PPIC with optimized factor F/sub g/. Finally, we compare the BER of 3-main categories of CDMA receivers: the conventional CDMA receiver, brute force cancellation with 2 stages and 3 stages, and PPIC with optimized factor F, with 2 stages and 3 stages. We can say that the use of PPIC with optimized factor is a very good technique to decrease the BER and increase the number of simultaneous users for a given system's parameters.
Starting Page	209
Ending Page	215
File Size	413918
Page Count	7
File Format	PDF
ISBN	9775031680
DOI	10.1109/NRSC.2001.929213
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-03-27
Publisher Place	Egypt
Access Restriction	Subscribed
Rights Holder	A.S.R.T.
Subject Keyword	Multiaccess communication Bit error rate Interference cancellation Amplitude estimation Equations System performance Power system modeling Multiple access interference Computer architecture Computational complexity
Content Type	Text
Resource Type	Article

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