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A three-shot improvement scheme for hard-decision based linear decorrelating detector in DS/CDMA

Zheng, F.-C. (1998) A three-shot improvement scheme for hard-decision based linear decorrelating detector in DS/CDMA. In: Proceedings of 48th IEEE vehicular technology conference. IEEE Press, pp. 2009-2012. ISBN 0780343204

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To link to this article DOI: 10.1109/VETEC.1998.686108

Abstract/Summary

This paper proposes a three-shot improvement scheme for the hard-decision based method (HDM), an implementation solution for linear decorrelating detector (LDD) in asynchronous DS/CDMA systems. By taking advantage of the preceding (already reconstructed) bit and the matched filter output for the following two bits, the coupling between temporally adjacent bits (TABs), which always exists for asynchronous systems, is greatly suppressed and the performance of the original HDM is substantially improved. This new scheme requires no signaling overhead yet offers nearly the same performance as those more complicated methods. Also, it can easily accommodate the change in the number of active users in the channel, as no symbol/bit grouping is involved. Finally, the influence of synchronisation errors is investigated.

Item Type:Book or Report Section
Refereed:Yes
Divisions:Faculty of Science > School of Systems Engineering
ID Code:18750
Uncontrolled Keywords:DS/CDMA, asynchronous DS/CDMA systems, hard-decision based method, linear decorrelating detector, matched filter output, performance, reconstructed bit, synchronisation errors, temporally adjacent bits, three-shot improvement scheme
Publisher:IEEE Press

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