Comments on "Symmetric capacity and signal design for L-out-of-K symbol-synchronous CDMA Gaussian channels"

TitleComments on "Symmetric capacity and signal design for L-out-of-K symbol-synchronous CDMA Gaussian channels"
Publication TypeJournal Article
Year of Publication2004
AuthorsDjonin, D. V., and V. K. Bhargava
JournalInformation Theory, IEEE Transactions on
Volume50
Pagination2921 - 2923
Date Publishednov.
ISSN0018-9448
Keywordsbinary sequences, CDMA, channel capacity, code division multiple access, correlation theory, eigenvalues, eigenvalues and eigenfunctions, energy-weighted correlation matrices, Gaussian channels, L-out-of-K symbol-synchronous Gaussian channels, lower bound, matrix algebra, optimisation, signal design, signature sequences, sum capacity maximization, symmetric capacity, synchronous code-division multiple access
Abstract

For original paper see A. A. Alsugair and R. S. Cheng, ibid., vol. 41, p. 1072-1082 (July, 1995). We show that the signature sequences set that maximizes the lower bound on symmetric capacity derived in the above paper also maximizes the sum capacity of the Gaussian synchronous code-division multiple-access (CDMA) channel. This is done by relying on the equivalence of the eigenvalues of energy-weighted correlation matrices. This result establishes the missing link between the above paper and the sum capacity maximization result by Viswanath et al. (1999).

URLhttp://dx.doi.org/10.1109/TIT.2004.836700
DOI10.1109/TIT.2004.836700

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