Title :
Channel-aided, decision-directed delay-locked loop for CDMA communications
Author :
Kiasaleh, Kamran
Author_Institution :
Texas Univ., Dallas, TX, USA
Abstract :
A channel-aided, decision-directed delay-locked loop (CADD-DLL) is investigated for code-division multiple-access (CDMA) communication. It is assumed that an estimate of channel multiplicative distortion (MD) is obtained at the receiver with the aid of pilot symbols. The performance of the proposed tracking loop is assessed in terms of the variance of PN code tracking error and the mean-time-to-loss (MTTL) for a frequency-selective Rayleigh fading channel in the presence of user-induced interference and lognormal shadowing
Keywords :
Rayleigh channels; code division multiple access; delay lock loops; multiuser channels; parameter estimation; phase shift keying; pseudonoise codes; radio receivers; radio tracking; radiofrequency interference; spread spectrum communication; BPSK; CADD-DLL; CDMA communications; PN code tracking error variance; channel-aided delay-locked loop; code-division multiple-access; decision-directed delay-locked loop; frequency-selective Rayleigh fading channel; lognormal shadowing; mean-time-to-loss; multiplicative distortion estimation; pilot symbols; receiver; tracking loop performance; user-induced interference; Delay; Frequency synchronization; Interference; Multiaccess communication; Performance loss; Pulse shaping methods; Shadow mapping; Shape; Signal processing; Tracking loops;
Conference_Titel :
Universal Personal Communications, 1998. ICUPC '98. IEEE 1998 International Conference on
Conference_Location :
Florence
Print_ISBN :
0-7803-5106-1
DOI :
10.1109/ICUPC.1998.733669
