Missile Wireless Data Transmission Using Irregular Time Windows
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Solution Overview
Problem
Existing methods for wireless transmission of information from a missile to a control center are vulnerable to jamming interference, as modern digital radio direction finders can monitor multiple frequency bands and decode spread spectrum transmissions.
Innovation Solution
A method involving the calculation of irregular pseudo-random time windows for data packet transmission, combined with selective use of spread spectrum transmission when a jammer is detected, and adaptive transmission power based on missile location coordinates, to ensure secure and interference-resistant communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spread spectrum transmission method is used to hide information in noise, then transmission resistance to jamming is improved, but modern digital radio direction finders can monitor multiple frequency bands and decode the transmission
Solution Approach 1:
The patent implements dynamic time window allocation where transmission opportunities are assigned irregularly and unpredictably to the missile transceiver. The control center dynamically adjusts which time windows are allocated for transmission, making it impossible for jammers to predict or continuously monitor all potential transmission frequencies and times, thus resolving the contradiction between transmission security and jammer monitoring capability
Solution Approach 2:
The patent uses periodic time windows for transmission but with irregular intervals between them. Instead of continuous or regularly spaced transmission opportunities, the system creates unpredictable periodic gaps where transmission can occur, preventing jammers from establishing continuous monitoring across all frequency bands while still providing regular transmission opportunities
2Reliability
If frequency band is constantly changing to avoid jamming, then transmission security is improved, but modern digital radio direction finders can monitor a large number of frequency bands simultaneously
Solution Approach 1:
The system dynamically assigns time windows irregularly, creating unpredictable transmission opportunities that force jammers to monitor all possible frequency bands continuously, which is computationally infeasible. This dynamic allocation pattern changes the effective transmission frequency in a way that cannot be tracked by modern direction finders
3Productivity
If data packets are transmitted continuously, then transmission efficiency is improved, but vulnerability to jamming increases
Solution Approach 1:
The patent implements periodic transmission opportunities through time windows, but with irregular intervals between them. This creates a balance where data can be transmitted in bursts during allocated windows (maintaining efficiency) while the irregular gaps prevent continuous jamming (reducing vulnerability)
Solution Approach 2:
The transmission process is segmented into discrete time windows with irregular spacing. Instead of continuous transmission, data packets are divided and transmitted in separate, unpredictable time segments, reducing the impact of jamming while maintaining overall transmission efficiency
Data Source
Figure 1~2
Figure 3
AI summary
The method involves providing an algorithm for computing time slot information (3) for time slots to transmit the data packets. The time slots have irregular distance from one another. The time slot information is generated using the algorithm in the control center. The generated time slot information is transmitted to transmitting- or receiving devices (1a,1b). The transmitting- or receiving devices are provided in missiles (F1,F2). The missiles are started and the data packet is transmitted from the transmitting- or receiving devices to another transmitting- or receiving device (2).