Minimising Complexity in Iterative Multiuser Detection Using Dynamic Decoding Schedules
Date
2006
Authors
Shepherd, David
Brannstrom, Fredrik
Shi, Zhenning
Reed, Mark
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Institute of Electrical and Electronics Engineers (IEEE Inc)
Abstract
In this paper we utilize extrinsic information transfer (EXIT) chart analysis with unequal user power levels in a coded direct-sequence code-division multiple-access (DS-CDMA) multiuser receiver to derive a dynamic decoding schedule. Conventional receivers generally follow a static predetermined decoding schedule. However, decoding delay and complexity can be significantly reduced while maintaining BER performance through a dynamic decoding schedule optimized for a given load and transmit power configuration. Verified through simulations, we show that complexity savings of up to 50% can be achieved. We also derive the effective EXIT charts which can be used for the convergence analysis and performance predictions of unequal power CDMA systems.
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Keywords: Binary sequences; Cellular radio systems; Code division multiple access; Convergence of numerical methods; Decoding; Graphic methods; Multiuser detection; Signal processing; Telecommunication; Bit error rate (BER) performance; Cdma systems; Conventional r
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Proceedings of the 7th Workshop on Signal Processing Advances in Wireless Communications
Type
Conference paper
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Restricted until
2037-12-31
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