LUO Hai-kun, WANG Yong-qing, SHEN Yu-yao, et al. Long-Term Integration Algorithm for Weak DSSS Signal in Large Dynamic Doppler Frequency Scenarios[J]. Acta Electronica Sinica, 2013, 41(12): 2397-2402.
LUO Hai-kun, WANG Yong-qing, SHEN Yu-yao, et al. Long-Term Integration Algorithm for Weak DSSS Signal in Large Dynamic Doppler Frequency Scenarios[J]. Acta Electronica Sinica, 2013, 41(12): 2397-2402. DOI: 10.3969/j.issn.0372-2112.2013.12.012.
There exist integration loss and computational cost drastic increasing in long-term integration of weak DSSS (Direct Sequence Spread Spectrum)signal in large dynamic Doppler frequency scenarios.A motion compensation-double block zero padding algorithm is proposed to this problem
which uses frequency spectrum cyclic shift for Doppler frequency searching
envelope shifting and Keystone transform for code Doppler frequency compensation based on the double block zero padding algorithm.Theoretical analysis and simulation results show that
the proposed algorithm can eliminate the influence of large dynamic Doppler frequency effectively
and has high computational efficiency
the computational cost is 16% of the similar algorithm in 20ms coherent integration