NDLI: A high capacity CDMA array-receiver requiring reduced pilot power

Content Provider	IEEE Xplore Digital Library
Author	Affes, S. Louzi, A. Kandil, N. Mermelstein, P.
Copyright Year	2000
Description	Author affiliation: Quebec Univ., Montreal, Que., Canada (Affes, S.)
Abstract	The use of coherent modulation for the uplink of wireless CDMA systems requires pilot signals which contribute to the interference seen by other users. In previous work we showed that blind array-receivers outperform pilot-channel assisted array-receivers in capacity for various operating conditions. These array-receivers avoid additional interference due to pilot signals and achieve better channel identification using relatively stronger data signals. However, for BPSK signals they identify the channel within a sign ambiguity and require differential modulation and decoding of coherently detected bits. In this contribution we implement coherent modulation and detection and further increase the advantage of this blind channel identification scheme by introducing a new pilot called "pilot-sign". This pilot simply allows resolution of the channel sign ambiguity after its estimation by long-term averaging of the pilot-channel combiner output. Analysis indicates that the resulting pilot-sign assisted array-receiver requires very weak pilot power ratios, in the range of a fraction of a percent, and allows very significant pilot power savings and large capacity gains compared to pilot-channel array-receivers.
Starting Page	910
Ending Page	916
File Size	707703
Page Count	7
File Format	PDF
ISBN	0780364511
DOI	10.1109/GLOCOM.2000.891271
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-11-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Interference Signal processing Binary phase shift keying Rayleigh channels Decoding Fading Phase change materials Data mining Wideband
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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