A hybrid frequency hopping pattern generation method, medium and device based on RS encoding and m sequence

By using absolute time time (TOD) for RS encoding and m-sequence generation in burst signal communication systems, the problem of inconsistent states of linear feedback shift registers is solved, generating frequency hopping patterns with good randomness and autocorrelation, thus simplifying FPGA circuit design.

CN115801055BActive Publication Date: 2026-05-29CHENGDU ZHONGKEWEI INFORMATIONTECHNOLOGY RESEARCH INSTITUTE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHENGDU ZHONGKEWEI INFORMATIONTECHNOLOGY RESEARCH INSTITUTE CO LTD
Filing Date
2022-11-18
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In communication systems with burst signals, it is difficult to keep the state of the linear feedback shift register consistent, which leads to complex FPGA implementation circuits and high resource consumption. Traditional frequency hopping pattern generation methods cannot meet the randomness and synchronization requirements of burst signals.

Method used

RS encoding is performed using the absolute time (TOD) of the frequency hopping communication system. A prescrambling sequence is extracted, and each group of linear feedback shift registers based on m sequences is scrambled by shifting the prescrambling sequence. The frequency hopping pattern of the burst signal is generated by recursive calculation.

Benefits of technology

It achieves good randomness and autocorrelation of frequency hopping patterns for burst signals, saves hardware resources, and simplifies FPGA implementation circuitry.

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Abstract

The application provides a hybrid frequency hopping pattern generation method, medium and device based on RS encoding and m sequence, the method comprises the following steps: RS encoding is performed by using absolute time TOD of a frequency hopping communication system, and a pre-scrambling sequence is extracted from the RS encoded code block; scrambling is performed on each group of linear feedback shift registers based on m sequence by shifting the pre-scrambling sequence, and 1-bit results of each group of linear feedback shift registers based on m sequence are obtained; and all frequency hopping patterns of a frame of burst signals are calculated by recursively calculating the 1-bit results of each group of linear feedback shift registers based on m sequence. The method for generating the frequency hopping pattern by using the RS encoding and the m sequence hybrid solves the problem of poor randomness of the burst signal frequency hopping pattern, guarantees good randomness, autocorrelation and cross-correlation of the frequency hopping pattern of the burst signal, saves a large amount of hardware resources, and makes the FPGA implementation circuit simple.
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