TY - GEN
T1 - A Fast Acquisition Algorithm Based on Two Stage Difference and Keystone Transform
AU - Wang, Xiaoxue
AU - Zheng, Zhe
AU - Sun, Boning
N1 - Publisher Copyright:
© 2023 Applied Computational Electromagnetics Society (ACES).
PY - 2023
Y1 - 2023
N2 - Aiming at the problem of limited accumulation time and dynamic influence on coherent accumulation in the acquisition of very low signal-to-noise ratio(SNR) and high dynamic Direct Sequence Spread Spectrum (DSSS) signals, a fast acquisition algorithm based on two stage difference combined with keystone transform is proposed. Firstly, the algorithm uses the two stage differential delay autocorrelation method to eliminate the influence of data bit jump and carrier doppler frequency, so that the correlation accumulation time is no longer limited by data bits. Secondly, the keystone transform is used to solve the problem of pseudo-code phase walk caused by high dynamic in long time accumulation. Finally, the carrier Doppler frequency is calculated by difference. The simulation results show that the algorithm can effectively solve the problem of data bit jump and dynamic influence in long time accumulation of DSSS signal in very low SNR and high dynamic scene.
AB - Aiming at the problem of limited accumulation time and dynamic influence on coherent accumulation in the acquisition of very low signal-to-noise ratio(SNR) and high dynamic Direct Sequence Spread Spectrum (DSSS) signals, a fast acquisition algorithm based on two stage difference combined with keystone transform is proposed. Firstly, the algorithm uses the two stage differential delay autocorrelation method to eliminate the influence of data bit jump and carrier doppler frequency, so that the correlation accumulation time is no longer limited by data bits. Secondly, the keystone transform is used to solve the problem of pseudo-code phase walk caused by high dynamic in long time accumulation. Finally, the carrier Doppler frequency is calculated by difference. The simulation results show that the algorithm can effectively solve the problem of data bit jump and dynamic influence in long time accumulation of DSSS signal in very low SNR and high dynamic scene.
KW - data bit jump
KW - delay autocorrelation
KW - keystone
KW - two stage difference
UR - http://www.scopus.com/inward/record.url?scp=85174284496&partnerID=8YFLogxK
U2 - 10.23919/ACES-China60289.2023.10249807
DO - 10.23919/ACES-China60289.2023.10249807
M3 - Conference contribution
AN - SCOPUS:85174284496
T3 - 2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023
BT - 2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023
Y2 - 15 August 2023 through 18 August 2023
ER -