Title :
Channel estimation for a DS-CDMA mobile radio system with a coherent reception
Author :
Krenz, Rafal ; Muratore, Flavio ; Romano, Giovanni
Author_Institution :
Dept. of Electron. & Commun., Tech. Univ. Poznan, Poland
Abstract :
A method to exploit channel estimation for a DS-CDMA mobile radio system with coherent reception in the Rake receiver is investigated by means of a software tool, named CDMASIM. Channel estimation is performed in the down link (base to mobile) by transmission of a pilot signal from the base station. Two different techniques for channel estimation are proposed and investigated in time and frequency selective channels. The first technique is based on correlation between the received signal and the pilot signal to perform channel identification, while the second is based on an adaptive stochastic gradient algorithm for channel equalization. The parameters that characterise the two techniques have been optimized in terms of BER and performance results are given in faded multipath environments with optimal parameters
Keywords :
code division multiple access; digital simulation; fading; land mobile radio; multipath channels; pseudonoise codes; software tools; spread spectrum communication; telecommunication computing; BER; CDMASIM; DS-CDMA mobile radio system; Rake receiver; adaptive stochastic gradient algorithm; channel equalization; channel estimation; channel identification; coherent reception; correlation; down link; faded multipath environments; frequency selective channels; optimal parameters; performance results; pilot signal transmission; received signal; software tool; time selective channels; Base stations; Channel estimation; Fading; Frequency estimation; Land mobile radio; Multiaccess communication; Multipath channels; Signal processing; Software tools; Stochastic processes;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345184
