SAGE Based Suboptimal Receiver for Downlink MC-CDMA Systems

Kabaoglu N.

IEEE COMMUNICATIONS LETTERS, cilt.15, ss.1381-1383, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 15 Konu: 12
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1109/lcomm.2011.102611.111722
  • Sayfa Sayıları: ss.1381-1383


An iterative joint data detection and channel estimation algorithm for downlink multi-carrier code division multiple access (MC-CDMA) systems is proposed. The resulting algorithm is a space alternating generalized expectation-maximization (SAGE) algorithm which updates the data sequences serially and the channel parameters in parallel, leading to a receiver structure that also incorparates interchannel interference cancellation. Its performance is compared with various Minimum Mean Square Error (MMSE) estimators for a multipath frequency selective fading channel using simulations. It is illustrated that the proposed SAGE algorithm performs better than the MMSE estimators considered in this paper.