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 journalArticlepeer-review

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

Bibliographical note

Funding Information:
This work was supported in part by the Ministry of Education and Human Resources Development(MOE), the Ministry of Commerce, Industry and Energy(MOCIE) and the Ministry of Labor(MOLAB) through the fostering project of the Lab of Excellency.

All Science Journal Classification (ASJC) codes

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

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