Variable rate non coherent MFSK modulation over Nakagami fading channels

Fadel F. Digham*, Mohamed Slim Alouini

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

3 Scopus citations


We propose a new adaptive scheme for power limited systems. For such systems, we offer a variable-rate and fixed-power non-coherent M-ary frequency shift keying (NC-MFSK) modulation scheme and analyze its performance over Nakagami fading channels. We recently addressed the system performance from the average link spectral efficiency, the average bit error rate (BER), and the probability of outage perspectives assuming that perfect channel estimates are available at the transmitter within a permissible delay. In this paper, we study the system performance in the case of outdated estimates. It is shown that only the average BER gets affected by outdated estimates. Our analysis shows that the system is insensitive to normalized delays fdτ up to 10-2 where fd is the doppler frequency and τ is the time delay. We then propose an adaptive switching thresholds system to better mitigate the effect of the delay.

Original languageEnglish (US)
Number of pages5
StatePublished - 2002
Externally publishedYes
EventGLOBECOM'02 - IEEE Global Telecommunications Conference - Taipei, Taiwan, Province of China
Duration: Nov 17 2002Nov 21 2002


OtherGLOBECOM'02 - IEEE Global Telecommunications Conference
Country/TerritoryTaiwan, Province of China

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Global and Planetary Change


Dive into the research topics of 'Variable rate non coherent MFSK modulation over Nakagami fading channels'. Together they form a unique fingerprint.

Cite this