Cooperative Radar Signaling for Non-Interfering Channel Selection
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Solution Overview
Problem
Mutual interference between vehicle-mounted millimeter-wave radars in intelligent vehicles reduces detection accuracy and increases false alarms, posing a significant threat to driving safety and comfort.
Innovation Solution
A signal transmission method involving cooperative radars that utilize a sense dedicated signal to indicate sending resource information, allowing detection apparatuses to select non-interfering channels for target detection, thereby reducing mutual interference and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If vehicle-mounted millimeter-wave radars are widely used for ADAS functions, then detection coverage and functionality are improved, but mutual interference between radars increases
Solution Approach 1:
The patent divides the radar detection system into multiple independent detection apparatuses, each equipped with a sense dedicated signal for coordinating resource allocation. By segmenting the detection space and time resources, radars can operate simultaneously without mutual interference, resolving the contradiction between detection coverage and mutual interference.
Solution Approach 2:
The sense dedicated signal acts as an intermediary communication mechanism between different radar detection apparatuses. This mediator carries resource allocation information that coordinates the detection activities of multiple radars, enabling them to share the detection space efficiently while avoiding mutual interference.
2Measurement precision
If radars transmit detection signals continuously to maintain detection coverage, then detection accuracy is improved, but false alarms increase due to interference
Solution Approach 1:
The patent implements preliminary action by having radars transmit sense dedicated signals before actual detection to establish resource allocation plans. This preliminary coordination allows radars to agree on non-interfering transmission schedules, ensuring that continuous detection can proceed accurately without causing false alarms due to interference.
Solution Approach 2:
The sense dedicated signal mechanism provides feedback about resource usage and interference conditions between radars. By continuously exchanging this feedback information, the system dynamically adjusts detection parameters to maintain accuracy while avoiding false alarms caused by mutual interference.
3Measurement precision
If radar transmission frequency is increased to improve detection resolution, then detection precision is improved, but interference between adjacent radars worsens
Solution Approach 1:
The patent applies dynamics by enabling radars to dynamically adjust their transmission frequency and time slots based on real-time coordination through sense dedicated signals. This dynamic adaptation allows the system to increase detection resolution when needed while avoiding interference by shifting transmission schedules, resolving the contradiction between resolution and interference.
Data Source
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AI summary
A signal transmission method, a detection apparatus, a chip system, and a computer storage medium are disclosed, and may be applied to a sensor, especially in the radar field, and in particular, relate to a cooperative radar. The method includes: obtaining a first moment, where the first moment is a start moment of a first time unit, and the first time unit is used for a first detection apparatus to send a first signal (SI01); and sending the first signal based on a first periodicity, where the first signal is used to indicate sending resource information of a detection signal, and the first time unit is further used for a second detection apparatus to receive the first signal (S102). When the detection signal is sent, the first signal used to indicate the sending resource information of the detection signal may be sent in the first time unit. The second detection apparatus may receive the first signal in the first time unit, so that the second detection apparatus can select channels that do not interfere with each other to send the detection signal, which improves performance when detecting a target. The method performs cooperation through communication to reduce mutual interference between radars.