Title :
Statistical properties of the MUSIC synchronization method for DS-CDMA systems
Author_Institution :
Dept. of Signals, Sensors & Syst., R. Inst. of Technol., Stockholm, Sweden
Abstract :
An analytical expression for the variance of the MUSIC propagation delay estimator for direct-sequence code-division multiple access (DS-CDMA) communication systems is derived. A convenient expression, valid for large signal-to-noise ratios, is also found. The results are asymptotic in the sense that the estimator is allowed to observe the received signal for an extended period of time; however, simulations show good agreement between the asymptotic results and the measured variance for reasonably short data blocks. It is shown that the asymptotic variance is invariant to the interfering users´ powers, hence the MUSIC estimator is near-far robust
Keywords :
cellular radio; code division multiple access; delays; land mobile radio; pseudonoise codes; radiofrequency interference; spread spectrum communication; synchronisation; DS-CDMA systems; MUSIC propagation delay estimator; MUSIC synchronization method; asymptotic variance; cellular system; data blocks; direct-sequence code-division multiple access; interfering users´ powers; large signal-to-noise ratios; near-far robust; simulations; statistical properties; AWGN; Delay estimation; Gaussian noise; Multiaccess communication; Multiple signal classification; Propagation delay; Pulse modulation; Sensor systems; Signal analysis; Signal processing;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.503435
