Wideband Waveform Channelization for Tactical Data Links
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Solution Overview
Problem
Tactical data links like Link 16 face challenges in increasing capacity, spectrum efficiency, and security while maintaining backward compatibility, especially due to jamming and interference, especially when traditional single-channel transmissions are used.
Innovation Solution
Generating a wideband waveform and mapping it across multiple available channels to spread the signal energy, reducing detectability and improving throughput and anti-jamming performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-channel transmission is used, then device complexity is reduced, but anti-jamming performance deteriorates
Solution Approach 1:
The patent divides the wideband waveform into multiple segments, each mapped to a different channel. This segmentation allows the transmission system to distribute signal energy across multiple channels, improving anti-jamming performance without requiring a completely complex new system architecture. The receiver similarly segments and processes each channel independently before combining results.
Solution Approach 2:
The patent transitions from single-channel transmission to multi-channel transmission by adding a spatial/frequency dimension to the transmission system. Instead of using one channel, the system utilizes multiple channels simultaneously, effectively moving from a one-dimensional to a multi-dimensional transmission approach, which enhances anti-jamming capabilities.
2Productivity
If wideband waveform is transmitted across multiple channels, then spectrum efficiency is improved, but device complexity increases
Solution Approach 1:
The wideband waveform is segmented into multiple parts that can be independently mapped to different channels. This segmentation enables efficient utilization of available spectrum resources across multiple channels while keeping the processing complexity manageable through systematic segmentation and mapping procedures.
Solution Approach 2:
The patent creates a transmission system that can universally adapt to multiple channels and dynamic channel availability. The same wideband waveform generation and segmentation mechanism works regardless of how many channels are available, providing multi-functionality and improving spectrum efficiency under varying conditions.
3Reliability
If channels are skipped to avoid jamming, then anti-jamming performance is improved, but transmission capacity is reduced
Solution Approach 1:
Instead of skipping channels in the frequency dimension, the patent utilizes the wideband waveform's inherent multi-dimensional nature to distribute energy across available channels. This approach transforms the problem from avoiding jammed channels to strategically distributing signal energy, maintaining transmission capacity while achieving anti-jamming performance.
Solution Approach 2:
The patent changes the transmission parameter from narrowband single-channel to wideband multi-channel transmission. By modifying the bandwidth and channel distribution parameters, the system can adapt to jamming conditions while maintaining or improving transmission capacity through the use of available spectrum resources.
Data Source
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AI summary
Methods, systems, and devices for channelizing a wideband waveform for transmission on a spectral band comprising unavailable channel segments are described. Generally, the described techniques provide for transmitting and receiving wideband waveforms when channels of a system bandwidth are unavailable for transmission. A transmitter may separate a first wideband signal into segments, with each segment a bandwidth corresponding to a channel of the system bandwidth, and may map the segments to the available channels. The transmitter may combine the mapped segments into a second wideband waveform and transmit the second wideband waveform using the available channels. A receiver may receive a first wideband signal waveform and may separate the first wideband signal waveform into segments, de-map the segments and combine the de-mapped segments into a second wideband waveform for demodulation. The techniques may be used to transmit and receive wideband waveforms over tactical data links.