Title :
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
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;
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
DOI :
10.1109/APMC.2009.5385514
