FMCW Radar Chirp Profile Switching for Single-Frame Object Detection
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Solution Overview
Problem
Conventional FMCW radar systems face delays in extracting object information due to fixed chirp parameters, leading to loss of important data as multiple frames are required to capture necessary information, caused by software latency and limited flexibility in configuring chirp parameters.
Innovation Solution
Implementing a chirp processing unit that stores and dynamically configures multiple chirp profiles in real-time within a single frame, allowing the timing engine to receive and use each chirp profile in transmission order, enabling flexible and timely configuration of chirp parameters for each chirp, thereby reducing the time needed to extract object information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If chirp parameters are fixed for a frame due to software latency, then the system is simpler to implement, but the time to extract object information increases and data loss occurs
Solution Approach 1:
The patent implements dynamic chirp parameter configuration by allowing the timing engine to receive and apply different chirp profiles for each chirp within a frame, rather than using fixed parameters. The chirp profile storage component stores multiple profiles, and the timing engine dynamically selects and applies the appropriate profile based on transmission order, enabling real-time adaptation without increasing overall system complexity
Solution Approach 2:
The patent segments the chirp parameter configuration into individual chirp-level profiles stored in the chirp profile storage component. Each chirp can have its own dedicated profile with specific parameters, allowing independent configuration and dynamic selection during frame transmission, thereby eliminating the need to wait for multiple frames to extract object information
2Device complexity
If multiple frames are required to capture necessary information, then the fixed chirp parameter system is simpler, but important data is lost and extraction time increases
Solution Approach 1:
The patent prepares multiple chirp profiles in advance within the chirp profile storage component, each configured with specific parameters suitable for different detection needs. The timing engine then retrieves and applies the appropriate pre-configured profile for each chirp transmission, enabling comprehensive object information capture within a single frame without requiring multiple frames
Solution Approach 2:
The system dynamically switches between different chirp profiles during frame transmission based on the timing engine's retrieval from storage. This dynamic profile switching enables the system to capture diverse object information (range, velocity, angle) within a single frame by adapting chirp parameters mid-frame, preventing information loss that would occur with fixed parameters requiring multiple frames
3Device complexity
If chirp parameters are programmed at the beginning of a frame, then software implementation is simpler, but the system lacks flexibility in configuring chirp parameters
Solution Approach 1:
The patent segments chirp parameter configuration into separate, identifiable profiles stored in the chirp profile storage component. Each profile contains a complete set of parameters for a specific chirp type, allowing the timing engine to retrieve and apply individual profiles as needed. This segmentation provides full parameter flexibility while maintaining simple software implementation through profile-based management
Solution Approach 2:
The patent uses template-based chirp profiles that can be copied and reused. The chirp profile storage component stores master profile templates that the timing engine retrieves and applies to multiple chirps. This copying mechanism provides versatile parameter configuration flexibility while keeping the software system simple through template reuse rather than individual parameter programming
Data Source
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AI summary
In described examples, a frequency modulated continuous wave (FMCW) radar system (600) includes: a chirp profile storage component (612) configured to store a chirp profile for each chirp of a frame of chirps; and a timing engine (604) coupled to the chirp profile storage component (612) to receive each chirp profile in transmission order during transmission of the frame of chirps. The timing engine (604) uses each chirp profile to configure a corresponding chirp.