Allocation of Walsh codes and quasi-orthogonal functions in cdma2000 forward link

Shiauhe Tsai, Farideh Khaleghi, Seong Jun Oh, Vieri Vanghi

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

In this paper, we investigate the code allocation problem of forward link channelization, i.e., allocation of Walsh codes and quasi-orthogonal functions (QOF's) in cdma2000 systems. Given multipath power profiles, geometry factors, and allocated codes of mobile stations (MS's), we propose a simple solution for the total sector transmit power. It is shown that the sector transmit power can be expressed in terms of a single variable, namely, the lumped geometry factor (LGF), which accounts for MS's geometry factors, code channel activities, and crosscorrelations among all the allocated codes. The formula is used to device a code allocation algorithm that is proven optimum in the sense of maximizing capacity, under the condition of single-path channels.

Original languageEnglish
Article number46
Pages (from-to)747-751
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume2
Issue number54ND
DOIs
Publication statusPublished - 2001

ASJC Scopus subject areas

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

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