Information-theoretic sum capacity of reverse link CDMA systems

Seong-Jun Oh, Aleksandar D. Damnjanovic, Anthony C K Soong

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

6 Citations (Scopus)

Abstract

The information on-theoretic sum capacity of reverse link CDMA systems is investigated in this paper. As the reverse link CDMA systems are interference-limited, for given channel and noise conditions, the information-theoretic system capacity can be achieved by optimaly managing the interference from mobile stations. Optimal interference management means optimal allocation of the transmit powers of the mobile stations. The exhaustive search of the optimal power allocation policy that maximizes the aggregate system capacity, requires O(N M) computations, where M is the number of the mobile station in the system and N is the granularity of the transmit power of a mobile station. In this paper, we prove that for a single cell, the number of computations to find the optimal power allocation solution can be reduced to O(N M), without sacrificing the optimality. We also show that an upper and a lower bound can be computed with O(M) computations, and the bounds are tight for small signal to noise ratio.

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
Pages93-97
Number of pages5
Volume57
Edition1
Publication statusPublished - 2003
Externally publishedYes
Event57th IEEE Semiannual Vehicular Technology Conference (VTC2003) - Jeju, Korea, Republic of
Duration: 2003 Apr 222003 Apr 25

Other

Other57th IEEE Semiannual Vehicular Technology Conference (VTC2003)
CountryKorea, Republic of
CityJeju
Period03/4/2203/4/25

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Oh, S-J., Damnjanovic, A. D., & Soong, A. C. K. (2003). Information-theoretic sum capacity of reverse link CDMA systems. In IEEE Vehicular Technology Conference (1 ed., Vol. 57, pp. 93-97)