Title :
Initial frequency acquisition in W-CDMA
Author :
Wang, Yi-Pin Eric ; Ottosson, Tony
Author_Institution :
Ericsson Inc., NC, USA
Abstract :
In this paper, methods of estimating the initial frequency error are proposed and evaluated for a mobile station (MS) operated in a wideband code division multiple access (W-CDMA) system. It is assumed that the initial frequency error of a MS can be as large as ±20 kHz due to the inaccuracy of the crystal oscillator. The proposed methods are based on the fast Fourier transform (FFT) technique with quadratic interpolation in the frequency domain to improve the accuracy of frequency estimation. It is found that the proposed FFT based algorithms achieve much better performance when compared to a differential phase detection approach
Keywords :
broadband networks; code division multiple access; fast Fourier transforms; frequency estimation; frequency-domain analysis; interpolation; maximum likelihood detection; maximum likelihood estimation; mobile radio; FFT based algorithms; W-CDMA; fast Fourier transform; frequency domain; frequency estimation; initial frequency acquisition; initial frequency error estimation; mobile station; quadratic interpolation; wideband code division multiple access; Discrete Fourier transforms; Fast Fourier transforms; Frequency estimation; Interpolation; Maximum likelihood estimation; Multiaccess communication; Oscillators; Signal processing; Signal to noise ratio; Timing;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.798588
