Title :
Pilot Aided Carrier Frequency Offset Estimation in MC-DS-CDMA Systems
Author :
Liu, Licheng ; Dai, Xianhua
Author_Institution :
Sch. of Inf. Eng., Guangdong Univ. of Technol., Guangzhou
Abstract :
In this paper, we propose a new algorithm for the carrier frequency offset (CFO) estimation of the uplink of multicarrier DS-CDMA (MC-DS-CDMA) systems. Firstly, our method exploits a new pilot scheme to obtain the approximation of the interested userpsilas signal from the composite signals on the user specific subcarrier in the receiver. Then the fast Fourier transform (FFT) operation is applied to estimate the CFO of the interested user. The proposed approach provides high-resolution estimation in the case of the slowly time-varying flat fading channel and low signal to noise ratio (SNR). The simulation results verify the performance of our algorithm.
Keywords :
channel estimation; code division multiple access; fading channels; fast Fourier transforms; frequency estimation; spread spectrum communication; MC-DS-CDMA systems; fast Fourier transform operation; high-resolution estimation; low signal to noise ratio; pilot aided carrier frequency offset estimation; receiver; time-varying flat fading channel; Communication system control; Control systems; Engineering management; Fast Fourier transforms; Frequency estimation; Interference; Multiaccess communication; OFDM; Signal to noise ratio; Technology management; MC-DS-CDMA; OFDM; carrier frequency offset;
Conference_Titel :
Computing, Communication, Control, and Management, 2008. CCCM '08. ISECS International Colloquium on
Conference_Location :
Guangzhou
Print_ISBN :
978-0-7695-3290-5
DOI :
10.1109/CCCM.2008.214
