Gradient Descent Interference Avoidance for Uplink CDMA Systems with Multipath

Gradient Descent Interference Avoidance for Uplink CDMA Systems with Multipath

In this paper we present an algorithm for joint codeword and power adaptation in uplink code division multiple access (CDMA) systems with multipath channels between users and the base station. The algorithm is based on gradient descent (GD) interference avoidance (IA) and adapts user codewords and p...

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Bibliographische Detailangaben
Hauptverfasser: Popescu, D.C., Rawat, D.B., Popescu, O.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Base stations
Error correction codes
Interference
Multiaccess communication
Multipath channels
Power control
Power system modeling
Quality of service
Signal to noise ratio
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Beschreibung
Zusammenfassung:In this paper we present an algorithm for joint codeword and power adaptation in uplink code division multiple access (CDMA) systems with multipath channels between users and the base station. The algorithm is based on gradient descent (GD) interference avoidance (IA) and adapts user codewords and powers incrementally to meet specified targets for the signal- to-interference+noise-ratio (SINR). The proposed algorithm is illustrated with numerical examples obtained from simulations.
ISSN:1058-6393
2576-2303
DOI:10.1109/ACSSC.2007.4487384