Blind adaptive modulation systems for wireless channels with binary feedback

Yahya Al-Harthi*, Ahmed Tewfik, Mohamed Slim Alouini

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


In this paper, we investigate the performance of a blind adaptive modulation scheme that does not require any channel knowledge and just uses binary feedback, thereby decreasing feedback load. Retransmission of erroneous packet is not considered. In particular, we present an analytical framework for the performance evaluation of a simple wireless system in terms of receiver and transmitter structure. The system requires no knowledge of the channel and relies on a binary feedback Slow and fast Rayleigh fading channel conditions are considered. The paper includes the derivation of closed-form expressions of the packet error rate (PER) and the spectral efficiency in the case of slow Rayleigh fading. In some cases, also closed-form expressions for the spectral efficiency are derived. Our results show relatively high PER but some applications such as voice communication can still operate in a satisfactory fashion in these conditions. Using coded modulation with high coding gain and increasing the number of blocks per time slot decrease the PER even more.

Original languageEnglish (US)
Pages (from-to)1318-1322
Number of pages5
JournalIEEE Vehicular Technology Conference
Issue number2
StatePublished - 2004
Externally publishedYes
Event2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States
Duration: Sep 26 2004Sep 29 2004


  • Adaptive modulation

ASJC Scopus subject areas

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


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