Research on fast acquisition algorithm of spread spectrum signal based on PMF-FFT

Sun, Boning; Zheng, Zhe; Zhou, Yang; Zhang, Ruoshi

doi:10.1109/ccisp55629.2022.9974243

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…In the field of GNSS, abundant research has been conducted on spreading spectrum code design, but much is concentrated on designing pseudo-code sequences with a better performance and new design methods, exemplified by the Kasami code and Weil code derived from the conventional sequences [18,19]. Sun et al [20] studied the influence of the change of the partial matched filter length on the acquisition performance indexes. Hussain [21] proposed a new adaptive data length (ADL) method for acquisition to speed up the acquisition process.…”

Section: Introductionmentioning

confidence: 99%

Research on Acquisition Performance of FFT Algorithm for Low-Frequency Spread-Spectrum Signals Using Acoustic Sensors

et al. 2023

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An essential precondition for the effective use of low-frequency spread-spectrum acoustic signals is their synchronous acquisition. Due to the low bit rate that low-frequency spread-spectrum signals have, the length of the spreading spectrum code and the number of intra-chip carriers need to be precisely designed to balance the acquisition performance and the bit rate in low-frequency spread-spectrum signals. Furthermore, the selection of the acquisition method and sampling frequency depends on the specific application and system requirements, which will directly affect the processing speed and accuracy. Firstly, this study uses a cyclical stepping search combined with a fixed threshold and maximum correlation discriminant method to improve the FFT acquisition algorithm with a low Doppler frequency. Secondly, the effects of the spreading spectrum code parameters and sampling frequency on the acquisition performance are also investigated through simulation and experiments with acoustic sensors. The results show that both lengthening the spreading spectrum code and increasing the number of intra-chip carriers can greatly improve the acquisition performance. Increasing the sampling frequency can improve the ranging accuracy but has a very limited improvement effect on the acquisition performance.

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Section: Introductionmentioning

confidence: 99%