New AFC algorithm for a fully-digital MDPSK DS/CDMA receiver

Author

Lei, Jing ; Ng, Tung-Sang

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ., China

Volume

4

fYear

2001

fDate

6-9 May 2001

Firstpage

294

Abstract

A new AFC algorithm is presented in this paper for correcting the sizable carrier frequency offset of a fully-digital MDPSK DS/CDMA receiver, which explores the power degradation at the correlator output and has an acquisition range of twice the symbol rate. To achieve fast frequency acquisition, the momentum steepest descent method and modified S-curve are employed in the algorithm. The simplicity of the algorithm makes it desirable for VLSI implementation. The performance of the proposed algorithm is also evaluated, and is compared with the Cramer-Rao bound and the results of other algorithms available in the literature

Keywords

automatic frequency control; code division multiple access; correlators; differential phase shift keying; digital communication; spread spectrum communication; AFC algorithm; Cramer-Rao bound; VLSI implementation; acquisition range; carrier frequency offset; correlator output; fully-digital MDPSK DS/CDMA receiver; modified S-curve; momentum steepest descent method; power degradation; symbol rate; Automatic frequency control; Correlators; Degradation; Differential phase shift keying; Filters; Frequency estimation; Gaussian noise; Multiaccess communication; Power engineering and energy; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on

Conference_Location

Sydney, NSW

Print_ISBN

0-7803-6685-9

Type

conf

DOI

10.1109/ISCAS.2001.922230

Filename

922230