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

Title	Comments on "Symmetric capacity and signal design for L-out-of-K symbol-synchronous CDMA Gaussian channels"
Publication Type	Journal Article
Year of Publication	2004
Authors	Djonin, D. V., and V. K. Bhargava
Journal	Information Theory, IEEE Transactions on
Volume	50
Pagination	2921 - 2923
Date Published	nov.
ISSN	0018-9448
Keywords	binary 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).
URL	http://dx.doi.org/10.1109/TIT.2004.836700
DOI	10.1109/TIT.2004.836700

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