Iterative channel estimation techniques for uplink MC-CDMA systems

Dogan H., PANAYIRCI E., Çırpan H. A.

7th IEEE International Symposium on Signal Processing and Information Technology, Cairo, Mısır, 15 - 18 Aralık 2007, ss.715-716 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası:
  • Doi Numarası: 10.1109/isspit.2007.4458126
  • Basıldığı Şehir: Cairo
  • Basıldığı Ülke: Mısır
  • Sayfa Sayıları: ss.715-716
  • İstanbul Üniversitesi Adresli: Evet

Özet

In this work, maximum likelihood (ML) channel estimation for uplink multicarrier code-division multiple-access (MC-CDMA) systems is considered in the presence of frequency fading channel. The expectation-maximization (EM)- and a space-alternating generalized expectation-maximization (SAGE) algorithm are introduced to avoid matrix inversion for the ML channel estimation problem. We compare the both algorithms in terms of the number of used iteration and show that the proposed algorithms converge the same performance of the ML estimator as the increasing number of iterations.