A joint feedback reduction scheme using delta modulation for dynamic channel allocation in OFDMA systems

Myeon Gyun Cho, Woohyun Seo, Daesik Hong

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A novel feedback-reduction scheme is proposed for dynamic channel allocation (DCA) in OFDMA systems. Applying this delta-modulation (DM)-based scheme to the channel gain of adjacent subcarriers reduces the feedback information to 1 bit per subcarrier. Since this reduced feedback information can lead to performance degradation in a bit error rate (BER), a modified amplitude craving greedy (ACG) method and improved DM are jointly adopted to minimize the loss. Simulation results verify that the proposed scheme can decrease feedback information by a factor of 1/M while retaining performance comparable to the full feedback case, which requires M bits per subcarrier.

Original languageEnglish
Pages (from-to)46-49
Number of pages4
JournalIEEE Transactions on Wireless Communications
Volume6
Issue number1
DOIs
Publication statusPublished - 2007 Jan 1

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All Science Journal Classification (ASJC) codes

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

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