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On the Capacity of CDMA with Linear Successive Interference Cancellation
KTH, Superseded Departments, Signals, Sensors and Systems.ORCID iD: 0000-0001-9697-9978
KTH, Superseded Departments, Signals, Sensors and Systems. (Radio Communication Systems)
KTH, Superseded Departments, Signals, Sensors and Systems. (Radio Communication Systems)
KTH, Superseded Departments, Signals, Sensors and Systems. (Radio Communication Systems)
2003 (English)In: European transactions on telecommunications, ISSN 1124-318X, E-ISSN 2161-3915, Vol. 14, no 6, 501-513 p.Article in journal (Refereed) Published
Abstract [en]

Combined power control and interference cancellation in CDMA systems can be a very efficient resourcemanagement tool. While conventional power control tries to maintain equal received power or balancedsignal-to-interference ratio (SIR), successive interference cancellation (SIC) in multi-user detection (MUD)relies more on the disparities between the powers of the different users. The combination can save morepower into the system and thus a room for a better capacity.

This paper investigates the interaction between power control and linear SIC in a single-rate CDMAsystem and its impact on the system capacity. The obtained results show that interference cancellation canimprove the capacity of CDMA and relax power control requirements. The full integration of power controland linear SIC detection is shown to provide excellent resource management in CDMA systems. Limitedinterference cancellation can be a good solution for CDMA systems as it provides considerable capacitygain with reduced complexity. An upper bound on the system capacity as a function of the cancellationparameters used along the different stages of the SIC detector is derived. Investigation of the optimumdecoding order is also provided in this paper.

Place, publisher, year, edition, pages
Wiley , 2003. Vol. 14, no 6, 501-513 p.
National Category
Computer and Information Science
Research subject
SRA - ICT
Identifiers
URN: urn:nbn:se:kth:diva-29795DOI: 10.1002/ett.950ISI: 000188659900004OAI: oai:DiVA.org:kth-29795DiVA: diva2:398064
Note
QC 20110217Available from: 2011-02-16 Created: 2011-02-16 Last updated: 2017-12-11Bibliographically approved

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