Title :
Improved MUSIC algorithm for estimation of time delays in asynchronous DS-CDMA systems
Author :
Ostman, Thomas ; Parkvall, Stefan ; Ottersten, Björn
Author_Institution :
Dept. of Signal, Sensors & Syst., R. Inst. of Technol., Stockholm, Sweden
Abstract :
An algorithm for time delay estimation in an asynchronous direct-sequence code-division multiple access (DS-CDMA) system which exploits the structure of the system better than previously known algorithms, is presented. The different algorithms are compared through simulation and asymptotic analysis (large number of vector samples). For a typical scenario it is shown that the proposed algorithm decreases the standard deviation of the time delay errors with a factor of approximately 2.
Keywords :
code division multiple access; covariance matrices; delays; parameter estimation; pseudonoise codes; signal sampling; spread spectrum communication; MUSIC algorithm; algorithm; asymptotic analysis; asynchronous DS-CDMA systems; covariance matrix; direct-sequence code-division multiple access; simulation; standard deviation; time delay errors; time delay estimation; vector samples; Algorithm design and analysis; Analytical models; Covariance matrix; Delay effects; Delay estimation; Direct-sequence code-division multiple access; Filters; Multiaccess communication; Multiple signal classification; Sensor systems;
Conference_Titel :
Signals, Systems & Computers, 1997. Conference Record of the Thirty-First Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-8186-8316-3
DOI :
10.1109/ACSSC.1997.680561
