Signature optimization for DS-CDMA with limited feedback

Wiroonsak Santipach, Michael L. Honig

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Scopus citations

Abstract

We examine a Direct Sequence (DS)-Code Division Multiple Access (CDMA) system with signature optimization for interference avoidance. Reduced-rank signature optimization, in which each signature is constrained to lie in a lower-dimensional subspace, is analyzed with a matched filter receiver. Performance is studied assuming that the signature coefficients are quantized for transmission over a feedback channel with limited bandwidth. Assuming scalar quantization of each reduced-rank coefficient, the dimension which maximizes the output Signal-to-Interference Plus Noise Ratio depends on the load and number of feedback bits, and can be much less than the number of signature coefficients. The performance of quantized reduced-rank signature optimization is compared with a random vector quantization scheme, which gives an upper bound on performance.
Original languageEnglish
Title of host publicationProceedings of 2002 IEEE Seventh International Symposium on Spread Spectrum Systems and Applications
DOIs
StatePublished - 2002
EventProceedings of 2002 IEEE Seventh International Symposium on Spread Spectrum Systems and Applications - Prague
Duration: Sep 2 2002 → …

Conference

ConferenceProceedings of 2002 IEEE Seventh International Symposium on Spread Spectrum Systems and Applications
Period9/2/02 → …

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    Santipach, W., & Honig, M. L. (2002). Signature optimization for DS-CDMA with limited feedback. In Proceedings of 2002 IEEE Seventh International Symposium on Spread Spectrum Systems and Applications https://doi.org/10.1109/ISSSTA.2002.1049271