Multi-Radar Coexistence via Waveform and Frame Delay Coordination
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Solution Overview
Problem
In wireless communication systems, multiple radar devices operating in the same environment create interference, leading to increased noise levels and the formation of 'ghost' targets, which can compromise target detection accuracy and potentially cause autonomous driving malfunctions.
Innovation Solution
Coordinating waveform parameters and frame delays between radar devices using a common transmission configuration and varying time delays to reduce interference and distinguish actual targets from ghost targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple radar devices operate in the same environment using independent transmission configurations, then each radar device can independently perform target detection, but interference between radar devices increases noise levels and creates ghost targets
Solution Approach 1:
The patent applies parameter changes by coordinating waveform parameters (such as chirp duration, bandwidth, and slope) and frame delay values among multiple radar devices. By dynamically adjusting these parameters based on a common transmission configuration, the radars reduce mutual interference and eliminate ghost targets while maintaining independent detection capabilities.
Solution Approach 2:
The patent implements universality by introducing a common transmission configuration that multiple radar devices share. This configuration includes coordinated waveform parameters and frame delay values that enable all radar devices to operate harmoniously in the same environment, reducing interference while each device maintains its target detection function.
2Reliability
If radar devices use varying time delays between frames, then ghost targets can be distinguished from actual targets, but the complexity of coordinating transmission configurations increases
Solution Approach 1:
The patent uses parameter changes by implementing varying frame delay values among radar devices. Each radar device applies a different delay value to its frame transmissions, which causes ghost targets to appear at different positions in range-Doppler maps across frames. This variation enables reliable distinction between actual targets and ghost targets, while the coordination complexity is managed through a standardized common transmission configuration framework.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for coordinating waveform parameters and frame delays for multi-radar coexistence. An example method performed by an apparatus comprising a radar device includes transmitting, based on a transmission configuration, one or more first signals of a plurality of signals in an environment via the radar device in a first frame of a plurality of frames according to a first delay value occurring after a frame prior to the first frame and transmitting one or more second signals via the radar device in at least a second frame of the plurality of frames according to a second delay value occurring after the first frame based on the transmission configuration. In some cases, the transmission configuration comprises a common transmission configuration for use in the environment. Additionally, in some cases, the second delay value is different from the first delay value.