Title :
Signal recognition and signature code acquisition in CDMA mobile packet communications
Author :
De Gaudenzi, Riccardo ; Giannetti, Filippo ; Luise, Marco
Author_Institution :
RF Syst. Div., Eur. Space Res. & Technol. Centre, Noordwijk, Netherlands
fDate :
2/1/1998 12:00:00 AM
Abstract :
Fast and reliable signal sense and signature code synchronization for direct-sequence spread-spectrum (DS-SS) signals are key issues in the design of the receiver for modern packet code-division multiple-access (CDMA) radio networks for mobile communications; this motivates the study of the signal recognition and code-acquisition (SR/CA) scheme we describe in this paper. Specifically, starting from elementary estimation and detection theory criteria, we work out a noncoherent parallel SR/CA algorithm that is suited to a full-digital implementation in a single application-specific integrated circuit (ASIC). The results of a theoretical analysis of such a scheme, encompassing additive white Gaussian noise (AWGN) and multiple-access interference (MAI), are integrated and validated by an overall time-domain system simulation. We also evaluate through a simplified approach the impact of some degradation factors on the overall circuit performance, namely, sampling epoch and carrier frequency offset and 1-b signal quantization, to allow optimization of the design parameters as a function of the characteristics of the received signal
Keywords :
Gaussian noise; application specific integrated circuits; code division multiple access; digital radio; digital signal processing chips; land mobile radio; packet radio networks; parallel algorithms; pattern recognition; pseudonoise codes; radio receivers; radiofrequency interference; signal processing; spread spectrum communication; synchronisation; white noise; 1-b signal quantization; CDMA mobile packet communications; additive white Gaussian noise; carrier frequency offset; circuit performance; degradation factor; design parameters; direct-sequence spread-spectrum; full-digital implementation; mobile communications; multiple-access interference; noncoherent parallel SR/CA algorithm; optimization; packet code-division multiple-access radio networks; receiver; sampling epoch; signal recognition; signal sense; signature code acquisition; single application-specific integrated circuit; synchronization; time-domain system simulation; AWGN; Application specific integrated circuits; Frequency synchronization; Multiaccess communication; Multiple access interference; Receivers; Signal design; Spread spectrum communication; Strontium; Telecommunication network reliability;
Journal_Title :
Vehicular Technology, IEEE Transactions on
