Title :
A PN Code Acquisition Scheme in the Presence of Data Modulation and Doppler Shift
Author :
Chen, Zhi-Jun ; Zhao, Jiang ; Guo, Su-Li ; Zhao, Ying-Bao
Author_Institution :
Hebei Univ. of Sci. & Technol., Hebei
Abstract :
A PN (pseudo noise) code acquisition scheme for direct sequence spread spectrum (DSSS) systems is developed in this paper, which is especially suitable for the simultaneous presence of various rate data modulation and wide Doppler shift range at low signal-to-noise ratio. The technique is based on FFT and noncoherent integration, and can be implemented easily with less hardware cost. Some computer simulation results are given, which show that the technique can achieve fast PN acquisition and obtain carrier Doppler frequency estimation.
Keywords :
Doppler shift; fast Fourier transforms; frequency estimation; pseudonoise codes; spread spectrum communication; Doppler frequency estimation; Doppler shift; FFT; data modulation; direct sequence spread spectrum systems; noncoherent integration; pseudo noise code acquisition scheme; signal-to-noise ratio; Correlators; Cybernetics; Doppler shift; Frequency synchronization; Hardware; Low earth orbit satellites; Machine learning; Modulation coding; Signal to noise ratio; Spread spectrum communication; Data modulation; Doppler; FFT; Noncoherent integration; PN code acquisition;
Conference_Titel :
Machine Learning and Cybernetics, 2007 International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-0973-0
Electronic_ISBN :
978-1-4244-0973-0
DOI :
10.1109/ICMLC.2007.4370597
