Information-theoretic sum capacity of reverse link CDMA systems

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

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


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(NM) 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
Pages (from-to)93-97
Number of pages5
JournalIEEE Vehicular Technology Conference
Issue number1
Publication statusPublished - 2003
Externally publishedYes
Event57th IEEE Semiannual Vehicular Technology Conference (VTC2003) - Jeju, Korea, Republic of
Duration: 2003 Apr 222003 Apr 25

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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