A fuzzy logic based channel estimation in Walsh-Hadamard transform employed OFDM systems


Oezen A., Soysal B., Kaya I.

IEEE 15th Signal Processing and Communications Applications Conference, Eskişehir, Turkey, 11 - 13 June 2007, pp.540-541 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • Doi Number: 10.1109/siu.2007.4298601
  • City: Eskişehir
  • Country: Turkey
  • Page Numbers: pp.540-541

Abstract

Performances of channel estimation and carrier frequency offset (CFO) tracking algorithms for a Walsh Hadamard Transform employed OFDM systems are investigated for frequency selective Rayleigh fading channels in this paper. Since the channel estimation and CFO tracking performance of the simple Least Mean Squares (LMS) is found to be poorer, a fuzzy based step-size controller is employed to increase speed and accuracy of LMS training. The simulation results show that the proposed method increases the performance of the LMS algorithm significantly and converges to the performances of the RLS algorithm.