Joint iterative interference cancellation and parameter estimation for cdma systems

Joint iterative interference cancellation and parameter estimation for cdma systems

This letter proposes a unified approach to joint iterative parameter estimation and interference cancellation (IC) for uplink CDMA systems in multipath channels. A unified framework is presented in which the IC problem is formulated as an optimization problem of an IC parameter vector for each stage...

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Veröffentlicht in:IEEE communications letters 2007-12, Vol.11 (12), p.916-918
Hauptverfasser: de Lamare, R.C., Sampaio-Neto, R., Hjorungnes, A.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Cancellation
Channels
Detection, estimation, filtering, equalization, prediction
Detectors
Exact sciences and technology
Information, signal and communications theory
Integrated circuit modeling
Integrated circuits
Interference
Interference cancellation
Iterative methods
Least squares method
Linear receivers
Matched filters
Miscellaneous
Multiaccess communication
Optimization
Optimization methods
Parameter estimation
Signal and communications theory
Signal processing
Signal, noise
Silicon carbide
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Vectors
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Beschreibung
Zusammenfassung:This letter proposes a unified approach to joint iterative parameter estimation and interference cancellation (IC) for uplink CDMA systems in multipath channels. A unified framework is presented in which the IC problem is formulated as an optimization problem of an IC parameter vector for each stage and user. We also propose detectors based on a least-squares (LS) joint optimization method for estimating the linear receiver filter front-end, the IC, and the channel parameters. Simulations for the uplink of a synchronous DS-CDMA system show that the proposed methods significantly outperform the best known IC schemes.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2007.070943