Joint rate and power adaptation strategies in DS/CDMA communications over fading channels

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We consider combined rate and power adaptation schemes in direct-sequence code division multiple access (DS/CDMA) communications, where the transmission power and the data rate are jointly adapted relative to channel variations. We propose to allocate the transmission power proportional to , where G i is the channel power gain and p is a real number, and to adapt the data rate simultaneously so that a desired transmission quality is maintained. We analyze the average data rate of the proposed adaptation scheme, and show that the proposed joint adaptation scheme provides up to 3.7-5.4 and 1.5-3.2 dB of power gains over power only adaptation and rate only adaptation, respectively, when peak-to-average power ratio is 2 to 10, in a Rayleigh fading channel with δ = 0.5, where δ is the decaying exponent of multipath intensity profile (MIP).

Original languageEnglish
Title of host publicationComputer Applications for Security, Control and System Engineering - International Conferences, SecTech, CA, CES3 2012, Held in Conjunction with GST 2012, Proceedings
Pages410-417
Number of pages8
DOIs
StatePublished - 2012
Event2012 Int. Conf. on SecTech 2012, 2012 Int. Conf. on Control and Automation, CA 2012 and the 2012 Int. Conf. on Circuits, Control, Communication, Electricity, Electronics, Energy, System, Signal and Simulation, Held in Conjunction with GST 2012 - Jeju Island, Korea, Republic of
Duration: 28 Nov 20122 Dec 2012

Publication series

NameCommunications in Computer and Information Science
Volume339 CCIS
ISSN (Print)1865-0929

Conference

Conference2012 Int. Conf. on SecTech 2012, 2012 Int. Conf. on Control and Automation, CA 2012 and the 2012 Int. Conf. on Circuits, Control, Communication, Electricity, Electronics, Energy, System, Signal and Simulation, Held in Conjunction with GST 2012
Country/TerritoryKorea, Republic of
CityJeju Island
Period28/11/122/12/12

Keywords

  • adaptation
  • DS/CDMA
  • Nakagami
  • variable power and rate

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