A novel finger assignment algorithm for RAKE receivers in CDMA systems

Mohamed Abou-Khousa, Mohamed El-Tarhuni, Ali Ghrayeb

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


In CDMA systems, assignment of the RAKE fingers the correct multipath components is crucial for the receiver to combat fading and to take advantage of the multipath diversity. This is particularly important since the number of fingers available is normally limited in order to maintain low receiver complexity. In this paper, we introduce a new RAKE receiver finger assignment algorithm (FAA) based on estimates of the signal-to-interference ratio (SIR) per path, as opposed to signal strength in the conventional schemes. We also introduce a simple algorithm to produce these SIR estimates. A performance comparison between the proposed scheme and already existing schemes is presented. We show that the proposed scheme provides a significant performance improvement relative to that of the conventional schemes. For instance, the proposed scheme provides gains of up to 3.0 dB at bit error rate 10 -4, relative to the conventional scheme.

Original languageBritish English
Pages (from-to)2516-2520
Number of pages5
JournalIEEE International Conference on Communications
StatePublished - 2004
Event2004 IEEE International Conference on Communications - Paris, France
Duration: 20 Jun 200424 Jun 2004


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