Frequency Hopping Sequence Generation via Pseudo-Random Scrambling
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Solution Overview
Problem
Existing frequency hopping techniques face challenges in adapting to varying spectrum availability and channel conditions, leading to interference issues and inefficient channel usage due to channel repeats.
Innovation Solution
A hopping sequence generator that utilizes a scrambling sequence derived from pseudo-random numbers to map unscrambled channels into scrambled sequences, detects and resolves channel repeats, and applies channel whitening to ensure uniform channel usage, thereby minimizing interference and optimizing channel utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing frequency hopping techniques are used, then communication can be established, but interference issues occur and channel usage becomes inefficient due to channel repeats
Solution Approach 1:
The patent changes the parameters of frequency hopping by introducing a pseudo-random sequence generator that produces unique hopping patterns based on configurable seeds. This transforms the fixed, repetitive hopping sequences into variable, non-repeating sequences that adapt to different communication scenarios, thereby reducing interference and improving reliability
Solution Approach 2:
The patent implements dynamic frequency hopping by allowing the hopping sequence to change based on pseudo-random generation with different seeds. The system can dynamically adjust the hopping pattern during communication, preventing channel repeats and adapting to varying channel conditions, which resolves the interference issue caused by static hopping patterns
2Productivity
If existing frequency hopping techniques are used, then communication can be established, but channel usage becomes inefficient due to channel repeats
Solution Approach 1:
The patent introduces configurable parameters including pseudo-random sequence length, seed values, and channel selection algorithms that optimize channel utilization. By changing these parameters, the system eliminates channel repeats and ensures efficient use of available frequency resources, directly improving productivity
Solution Approach 2:
The patent uses pseudo-random sequence copying and transformation to generate diverse hopping patterns from a base sequence. Different seeds generate different but related hopping sequences, allowing multiple users or channels to operate efficiently without repeating the same channel patterns, thereby improving overall system productivity
3Reliability
If frequency hopping adapts to varying spectrum availability, then communication reliability improves, but system complexity increases
Solution Approach 1:
The patent implements self-service through autonomous pseudo-random sequence generation at both transmitter and receiver ends. Each device independently generates the same hopping sequence using shared seed information, eliminating the need for complex centralized coordination while maintaining reliability. The system serves itself by automatically adapting to spectrum conditions through the mathematical properties of pseudo-random sequences
4Object-affected harmful factors
If pseudo-random sequences are used for frequency hopping, then interference is reduced, but adaptability to different locations and spectrum conditions decreases
Solution Approach 1:
The patent achieves universality by designing a configurable pseudo-random sequence generator that can adapt to different locations and spectrum conditions through parameter adjustment. The same core mechanism serves multiple functions: generating interference-resistant hopping sequences, adapting to varying channel availability, and supporting different communication standards, thereby maintaining both interference reduction and adaptability
Data Source
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AI summary
Techniques for frequency-hopping sequence-generation are described herein. In one example, a sequence of pseudo random numbers may be used to generate a scrambling sequence. The scrambling sequence may be used to map an unscrambled sequence of channels into a scrambled sequence of channels. Channel-repeats may be detected in the scrambled sequence of channels and resolved. Channel whitening may be performed to reduce channel overuse resulting from the channel-repeat resolutions. The scrambled sequence of channels may be provided to a radio to enable the radio to tune to the channels indicated by the scrambled sequence of channels.