Time-frequency decision-driven multiuser detectors over fast-fading multipath channels for synchronous DS-CDMA systems

ERTUĞ Ö., BAYKAL B., ÜNAL B.

12th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2001), San Diego, CA, Amerika Birleşik Devletleri, 30 Eylül - 03 Ekim 2001, cilt.1 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 1
  • Basıldığı Şehir: San Diego, CA
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Gazi Üniversitesi Adresli: Evet

Özet

RAKE receivers suffer degradation in performance under fast fading due to errors in channel state estimation. The wide-sense stationary uncorrelated scatterer channel model lends itself to time-frequency canonical representation, and provides additional diversity in the frequency axis. That is, the joint multipath-Doppler diversity model enables the development of nonlinear decision-driven time-frequency multiuser detectors based on successive interference cancellation and multistage interference cancellation ideas. Simulation results demonstrate that the proposed nonlinear decision-driven time-frequency multiuser detectors promise substantially improved bit-error-rate performance compared to previously proposed time-frequency multiuser detectors while exhibiting strong resistance to the near-far effect.