Blind Estimation of the Spread Spectrum Sequence of DS-SS Signals Based on Improved Propagator Method[J]. Acta Electronica Sinica, 2020, 48(1): 9-16. DOI: 10.3969/j.issn.0372-2112.2020.01.002.
Aiming at the problem of inaccurate estimation of out-of-step time and large computation in eigenvalue decomposition algorithm
the direct sequence spread spectrum (DS-SS) signal blind estimation problem of spread spectrum sequence is studied
and an algorithm based on improved propagator is proposed in this paper. The algorithm can estimate the spread spectrum sequence and the signal out-of-step time by using the signal subspace. Compared with the eigenvalue decomposition method
the estimation accuracy of the out-of-step time is improved and the amount of calculation is effectively reduced. Finally
the computational amount and performance of the algorithm are simulated and verified. The results show that the proposed algorithm is effective
the computational amount is far less than the eigenvalue decomposition algorithm
and the performance is better under the condition of low SNR.