Despreading code synchronization technique utilizing discrete sampled data and its application to DS-CDMA systems using RF direct under-sampling

Author

Okuizumi, Ryoichi ; Konishi, Kazutaka ; Muraguchi, Masahiro

Author_Institution

Dept. of Electr. Eng., Tokyo Univ. of Sci., Tokyo, Japan

fYear

2009

fDate

7-10 Dec. 2009

Firstpage

2176

Lastpage

2179

Abstract

A novel synchronization technique for despreading codes for DS-CDMA utilizing discrete data obtained by sampling is proposed. The technique enables despreading codes to be synchronized with received signals without using additional tracking circuits even when sampling phases deviate from phases of received signals. We applied this synchronization technique to a DS-CDMA receiver using an RF direct under-sampling. Experimental results of tests of the CDMA receiver fabricated with FPGA devices showed that the synchronization technique was effective for despreading codes.

Keywords

code division multiple access; field programmable gate arrays; signal sampling; spread spectrum communication; synchronisation; CDMA receiver; DS-CDMA systems; FPGA devices; RF direct under-sampling; despreading code synchronization technique; field programmable gate arrays; tracking circuits; Analog-digital conversion; Circuit testing; Digital communication; Field programmable gate arrays; Frequency synchronization; Multiaccess communication; Radio frequency; Receivers; Sampling methods; Wireless communication; Code division multiaccess; digital radio; pseudonoise coded communication; sampling methods; synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2009. APMC 2009. Asia Pacific

Conference_Location

Singapore

Print_ISBN

978-1-4244-2801-4

Electronic_ISBN

978-1-4244-2802-1

Type

conf

DOI

10.1109/APMC.2009.5385514

Filename

5385514