Reconfigurable Sensing Frames for Equidistant Radar Sampling
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Solution Overview
Problem
Combining radar and communication systems in devices like automobiles results in challenges where radar samples are not equidistant due to varying communication data, affecting radar performance and accuracy in determining object characteristics.
Innovation Solution
A communication system reserves additional symbols for radar samples and adjusts their positions within frames to ensure equidistance, maintaining radar accuracy while integrating with communication data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radar and communication systems are combined in devices like automobiles, then system resource efficiency is improved by sharing transmit and receive antennae, but radar sample equidistance deteriorates due to varying communication data lengths
Solution Approach 1:
The patent segments the frame structure into distinct communication symbols and radar sensing symbols. By dividing the frame into these separate segments with clearly defined boundaries, the system can maintain independent optimization for each function while sharing hardware resources, thus preserving radar sample equidistance despite varying communication data requirements
Solution Approach 2:
The patent introduces frame structure design as an intermediary mechanism that mediates between communication and radar requirements. The frame structure acts as a container that organizes communication symbols and radar sensing symbols in a way that ensures radar samples remain equidistant while allowing communication data to vary in length, thus resolving the conflict between the two systems
2Adaptability or versatility
If communication data length varies in the transmitted stream, then communication flexibility is improved, but radar velocity determination accuracy deteriorates due to non-equidistant radar samples
Solution Approach 1:
The patent segments the transmitted stream into communication symbols and radar sensing symbols with distinct boundaries. This segmentation ensures that radar sensing symbols are positioned at fixed intervals regardless of communication data length variations, maintaining the equidistance required for accurate velocity determination through Doppler frequency analysis
Solution Approach 2:
The patent implements periodic radar sensing symbols within the frame structure that occur at regular intervals. This periodic placement of radar symbols ensures equidistant sampling in the time domain, which is essential for accurate velocity measurement, while allowing communication data to vary between these periodic radar intervals
3Ease of operation
If radar samples are placed at fixed positions in the frame, then radar processing simplicity is improved, but communication bandwidth deteriorates due to reserved symbols reducing available communication capacity
Solution Approach 1:
The patent implements a dynamic frame structure where the positions and numbers of radar sensing symbols can be flexibly configured within the frame. This dynamic approach allows the system to optimize the balance between radar processing simplicity and communication bandwidth by adjusting radar symbol placement based on specific operational requirements, rather than using fixed rigid positions
Data Source
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AI summary
A communication system reserves a first portion of a transmitted frame for communication symbols and a second portion of the transmitted frame of symbols for a plurality of radar sensing symbols. The communication symbols are of variable length. The communication system sets a position of a first symbol of the radar sensing symbols so that the plurality of radar sensing symbols are equidistant in the frame of symbols