Radar Signal Evaluation Using Multiple Beamformings
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Solution Overview
Problem
Radar systems with uniform linear arrays (ULA) experience fluctuating gain over the angular range of the field of location, leading to significant drops in sensitivity, which hampers efficient angular resolution and object detection.
Innovation Solution
Applying multiple beamformings to radar signals, where each beamforming complements the others to achieve a more homogeneous antenna gain, with the second beamforming having maxima in the regions of minima of the first beamforming, and potentially using a complex window function to shift maxima by half a bin, thereby compensating for gain drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single beamforming is applied to radar signals from a uniform linear array, then the processing is efficient and computing outlay is reduced, but the gain fluctuates significantly over the angular range of the field of location
Solution Approach 1:
The patent divides the beamforming process into multiple segments (first beamforming and second beamforming) with different weighting functions. Each beamforming segment processes the radar signals separately with its own characteristics, and the results are combined to achieve more uniform gain distribution across the angular range while maintaining computational efficiency.
Solution Approach 2:
The patent creates a composite beamforming solution by combining results from different beamforming processes. The first beamforming uses one weighting function while the second uses a different weighting function, and their combined output produces a composite effect that compensates for the gain fluctuations of individual beamformings, achieving both efficiency and reliability.
2Area of stationary object
If the field of location is increased to improve detection coverage, then more area is monitored, but the gain drops significantly over the angular range
Solution Approach 1:
The patent applies different weighting functions to different beamforming processes, where each beamforming is optimized for specific angular regions. The first beamforming may be optimized for certain angles while the second compensates for other regions, ensuring that each local angular range maintains adequate gain and detection sensitivity across the entire extended field of location.
3Reliability
If multiple beamformings are applied to compensate for gain drops, then gain uniformity is improved, but computing resources increase
Solution Approach 1:
The patent segments the beamforming computation into two distinct processes with different weighting functions. By dividing the computational task into manageable segments that can be processed separately and then combined, the system achieves uniform gain distribution while keeping the computing outlay of each individual segment reasonable and efficient.
Data Source
AI summary
An improved evaluation of radar signals, in particular radar signals received by a Uniform Linear Array (ULA) antenna. Through the application of a plurality of different beamformings to the radar signals, drops in the gain can be compensated by the beamforming.