EM-Based MAP channel estimation and data detection for downlink MCC-CDMA systems


Dogan H. , Panayirci E., Çırpan H. A.

IEEE Wireless Communications and Networking Conference, Hong Kong, PEOPLES R CHINA, 11 - 15 Mart 2007, ss.227-228 identifier identifier

  • Cilt numarası:
  • Doi Numarası: 10.1109/wcnc.2007.48
  • Basıldığı Şehir: Hong Kong
  • Basıldığı Ülke: PEOPLES R CHINA
  • Sayfa Sayıları: ss.227-228

Özet

In this work, we propose a joint MAP channel estimation and data detection technique based on the Expectation Maximization (EM) method with paralel interference cancelation(PIC) for downlink multi-carrier (MC) code division multiple access (CDMA) systems in the presence of frequency selective channels. The EM algorithm derived estimates the complex channel parameters of each subcarriers iteratively and generates the soft information representing the data a posterior probabilities. The soft information is then employed in a PIC module to detect the symbols efficiently.