Iterative Radar Signal Generation for Resolution Without Bandwidth
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Solution Overview
Problem
Communication and radar systems face challenges in preserving information transmission efficiency due to channel limitations, requiring optimization of signal parameters, bandwidth, and hardware components, which often result in increased complexity and resource requirements.
Innovation Solution
A method of generating a reference signal by iteratively adding a scaled signal to a first signal at specific time points, adjusting amplitude to reduce cost, and performing iterative filtering to limit bandwidth, while optimizing for ambiguity functions such as range, velocity, and Angle of Arrival ambiguity, thereby enhancing signal resolution without increasing bandwidth or power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal parameters, bandwidth, and hardware components are optimized to preserve information transmission efficiency, then communication performance is improved, but system complexity and resource requirements increase
Solution Approach 1:
The patent changes the temporal structure parameter of the radar signal by introducing iterative addition at specific time points rather than modifying hardware components or increasing bandwidth. This parameter change achieves improved range resolution and target detection capability without increasing system complexity
Solution Approach 2:
The signal generation process is segmented into iterative steps where a scaled version of the signal is added at specific time points. This segmentation allows precise control over the signal's correlation properties and ambiguity function characteristics, improving transmission efficiency without requiring complex hardware modifications
2Measurement precision
If bandwidth is increased to improve signal resolution, then measurement precision is improved, but bandwidth consumption increases
Solution Approach 1:
Instead of increasing bandwidth, the patent changes the time-domain structure of the signal by iteratively adding scaled versions at specific time points. This parameter change in the temporal domain achieves improved range resolution (measurement precision) while maintaining the same bandwidth consumption
3Productivity
If power is increased to enhance signal transmission, then productivity is improved, but energy consumption increases
Solution Approach 1:
The patent improves signal transmission capability by changing the correlation structure and ambiguity function properties through iterative time-point addition. This parameter change enhances target detection productivity without increasing transmitted power, as the improvement comes from better signal structure rather than higher energy input
Data Source
AI summary
A method of generating a reference signal for transmission over a wireless communication channel comprises generating a first signal of a first characteristic, generating a second signal with second characteristic, scaling the second signal at least in time and an amplitude to form a scaled signal and iteratively adding the scaled signal to the first signal to generate the reference signal. The iteratively adding comprises time indexing the first signal with plurality of time points, adding the scaled signal to first signal at each time point in the plurality of time points, computing a cost function to determine the cost of adding the scaled signal at each time point in the plurality of time points, selecting a set of time points that indicate reduction in the cost when the scaled signal is added and adjusting the amplitude of the scaled signal at each time point in the set of time points to reduce the cost.