Title :
Soft output demodulation on frequency-selective Rayleigh fading channels using AR channel models
Author :
Zhang, Yuze ; Fitz, Michael P. ; Gelfand, Saul B.
Author_Institution :
Lucent Technol., USA
Abstract :
This paper presents a systematic study of high performance soft output demodulation for frequency-selective Rayleigh fading using an AR channel model. For channel taps modeled as AR processes, the optimum symbol-by-symbol demodulator is derived. Additionally a demodulator with an extended Kalman filter (KF) is proposed that jointly identifies and tracks the channel and the unknown parameters in AR channel models. A simulation study shows the proposed algorithms offer significant advantages in performance or complexity compared to previously proposed algorithms
Keywords :
Kalman filters; Rayleigh channels; adaptive estimation; autoregressive processes; data communication; demodulation; fading; filtering theory; land mobile radio; nonlinear filters; parameter estimation; tracking filters; AR channel models; AR processes; adaptive estimation; algorithms; channel identification; channel taps; channel tracking; complexity; correlation function; extended Kalman filter; frequency-selective Rayleigh fading channels; mobile wireless data communications; optimum symbol-by-symbol demodulator; parameter estimation; performance; simulation study; soft output demodulation; Communication standards; Covariance matrix; Data communication; Delay systems; Demodulation; Fading; Frequency; Rayleigh channels; Time varying systems; Wireless communication;
Conference_Titel :
Global Telecommunications Conference, 1997. GLOBECOM '97., IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-4198-8
DOI :
10.1109/GLOCOM.1997.632563
