Title :
Comments on "Symmetric capacity and signal design for L-out-of-K symbol-synchronous CDMA Gaussian channels
Author :
Djonin, Dejan V. ; Bhargava, VijayK
Author_Institution :
Dept. of Electr. & Comput. Eng., British Columbia Univ., Vancouver, BC, Canada
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).
Keywords :
Gaussian channels; binary sequences; channel capacity; code division multiple access; correlation theory; eigenvalues and eigenfunctions; matrix algebra; optimisation; CDMA; L-out-of-K symbol-synchronous Gaussian channels; eigenvalues; energy-weighted correlation matrices; lower bound; signal design; signature sequences; sum capacity maximization; symmetric capacity; synchronous code-division multiple access; Additive white noise; Associate members; Baseband; Eigenvalues and eigenfunctions; Gaussian channels; Multiaccess communication; Signal design; Symmetric matrices; Transmitters; White noise;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2004.836700
