Title :
Intermediate frequency PN code acquisition employing sequential detection algorithm for satellite CDMA system
Author :
Yuchu, Ma ; Xuemai, Gu ; Naitong, Zhang
Author_Institution :
Commun. Res. Center, Harbin Inst. of Technol., China
Abstract :
An intermediate frequency (IF) hybrid sequential code acquisition scheme designed for satellite CDMA systems is proposed. The received signal is directly sampled in IF using a 1-bit A/D converter. A continuous accumulator is utilized to increase effective signal-to-noise ratio (SNR), which is different from most of the sequential acquisition schemes. By employing this structure, faster acquisition can be achieved. This scheme has been verified by computer simulation proving that it can provide better performance then both the conventional sequential and serial acquisition scheme
Keywords :
code division multiple access; mobile satellite communication; pseudonoise codes; sequential codes; spread spectrum communication; 1-bit A/D converter; DS-CDMA; PN code acquisition; SNR; computer simulation; continuous accumulator; intermediate frequency hybrid sequential code acquisition; satellite communication system; sequential detection algorithm; signal-to-noise ratio; Application specific integrated circuits; Artificial satellites; Computer simulation; Detection algorithms; Frequency synchronization; Multiaccess communication; Sampling methods; Sequential analysis; Signal to noise ratio; Uncertainty;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944148
