Acquisition of Orthogonal Modulated Signals in Rayleigh-Fading Channels
Xiao, P and Strom, E (2002) Acquisition of Orthogonal Modulated Signals in Rayleigh-Fading Channels In: European Wireless, 2002-02-25 - 2002-02-28, Florence Italy.
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The problem of estimating propagation delays of the orthogonal modulated signals in asynchronous DS-CDMA system over fading channels is treated in this paper. The system under study resembles the uplink of an IS-95 system. The channel is assumed to be a time-varing flat Rayleigh-fading channel. The shortcoming of the sliding correlator as the standard method of code acquisition is examined and three robustified versions of delay estimators,namely whitened sliding correlator, subspace based delay estimator and MMSE based delay estimator are proposed to combat the multiple access interference (MAI) in the Rayleigh-fading channels. The performance of these estimators are compared with the computer simulations as a function of different parameters, e.g., the number of pilots, near-far resistance, signal to noise ratio,etc..
|Item Type:||Conference or Workshop Item (Conference Paper)|
|Divisions :||Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research|
|Date :||25 February 2002|
|Depositing User :||Symplectic Elements|
|Date Deposited :||15 Nov 2013 13:32|
|Last Modified :||09 Jun 2014 13:11|
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