Performance analysis of joint diversity combining, adaptive modulation, and power control schemes

Khalid Qaraqe, Zied Bouida, Mohamed Slim Alouini

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Adaptive modulation and diversity combining represent very important adaptive solutions for future generations of wireless communication systems. Indeed, in order to improve the performance and the efficiency of these systems, these two techniques have been recently used jointly in new schemes named joint adaptive modulation and diversity combining (JAMDC) schemes. Considering the problem of finding low hardware complexity, bandwidth-efficient, and processing-power efficient transmission schemes for a downlink scenario and capitalizing on some of these recently proposed JAMDC schemes, we propose and analyze in this paper three joint adaptive modulation, diversity combining, and power control (JAMDCPC) schemes where a constant-power variable-rate adaptive modulation technique is used with an adaptive diversity combining scheme and a common power control process. More specifically, the modulation constellation size, the number of combined diversity paths, and the needed power level are jointly determined to achieve the highest spectral efficiency with the lowest possible processing power consumption quantified in terms of the average number of combined paths, given the fading channel conditions and the required bit error rate (BER) performance. In this paper, the performance of these three JAMDCPC schemes is analyzed in terms of their spectral efficiency, processing power consumption, and error-rate performance. Selected numerical examples show that these schemes considerably increase the spectral efficiency of the existing JAMDC schemes with a slight increase in the average number of combined paths for the low signal-to-noise ratio range while maintaining compliance with the BER performance and a low radiated power which yields to a substantial decrease in interference to co-existing users and systems.

Original languageEnglish
Article number5648745
Pages (from-to)106-115
Number of pages10
JournalIEEE Transactions on Communications
Volume59
Issue number1
DOIs
Publication statusPublished - Jan 2011

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Adaptive modulation
Power control
Bit error rate
Electric power utilization
Processing
Fading channels
Signal to noise ratio
Communication systems
Modulation
Hardware
Bandwidth

Keywords

  • adaptive modulation
  • Diversity techniques
  • minimum selection generalized selection combining
  • performance analysis
  • power control
  • Rayleigh fading channels

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Performance analysis of joint diversity combining, adaptive modulation, and power control schemes. / Qaraqe, Khalid; Bouida, Zied; Alouini, Mohamed Slim.

In: IEEE Transactions on Communications, Vol. 59, No. 1, 5648745, 01.2011, p. 106-115.

Research output: Contribution to journalArticle

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