FMCW Signal Parameter Coordination for Shared-Resource Radar Interference
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Solution Overview
Problem
Mutual interference between FMCW signals from multiple radars sharing the same time-frequency resource leads to inaccurate detection results.
Innovation Solution
A first apparatus generates parameter information for multiple second apparatuses to generate FMCW signals with specific time shifts, slopes, and phase coding parameters to suppress interference, allowing them to share resources while minimizing signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple radars transmit FMCW signals using the same time-frequency resource, then resource utilization is improved, but signal interference increases leading to inaccurate detection
Solution Approach 1:
The patent applies parameter changes by modifying the FMCW signal parameters (time shift, slope, phase coding) to create distinguishable signal characteristics. Each radar transceiver is assigned unique parameter combinations, transforming the signals from identical to differentiated while maintaining the same time-frequency resource usage, thus enabling accurate detection despite resource sharing.
Solution Approach 2:
The patent segments the signal generation process by introducing separate parameter sets for different transceivers. The first transceiver uses a first set of parameters while the second transceiver uses a second set, effectively dividing the signal space into distinguishable segments. This segmentation allows the receiving end to identify and separate individual signals from the mixed received signals.
2Productivity
If FMCW signals from multiple radars share the same resource, then system efficiency is improved, but mutual interference between signals increases
Solution Approach 1:
The patent introduces parameter information as an intermediary that mediates between multiple transceivers sharing the same resource. This intermediary carries identification and differentiation information that allows each transceiver to generate uniquely identifiable signals. The parameter information acts as a mediator that enables efficient resource sharing while preventing harmful mutual interference through clear signal differentiation.
Solution Approach 2:
The patent changes signal parameters (time shift, slope, phase coding) to transform identical FMCW signals into differentiated signals. By modifying these parameters for different transceivers, the system maintains high efficiency through resource sharing while eliminating mutual interference through parameter-based signal differentiation.
3Measurement precision
If unique parameters are assigned to each radar signal, then interference suppression is improved, but signal generation complexity increases
Solution Approach 1:
The patent implements parameter changes by systematically varying time shift, slope, and phase coding parameters for different transceivers. These parameter modifications create unique signal fingerprints that enable interference suppression. The approach balances detection accuracy improvement with manageable complexity by using standard parameter modulation techniques rather than fundamentally new signal generation methods.
Solution Approach 2:
The patent applies dynamics by making signal parameters adjustable and configurable for different transceivers. The system can dynamically assign different parameter sets to different devices based on their identification information. This dynamic parameter assignment enables unique signal differentiation without requiring complex hardware modifications, thus improving detection accuracy while keeping device complexity manageable.
Data Source
AI summary
This application provides a signal transmission method, a communication apparatus, and a communication system, that serve to suppress interference between signals of a plurality of transceivers sharing a same resource. In the method, a first apparatus generates parameter information and sends the parameter information to a second apparatus, such as a transceiver. The parameter information may be determined based on one or more multiplexing modes. The parameter information indicates a value of at least one of a time shift of a time for transmitting a frequency modulated continuous wave (FMCW) signal relative to a reference time, a slope of the FMCW signal, a plus-minus sign of the slope, and a coding parameter used to generate the FMCW signal through phase coding. The second apparatus receives the parameter information and, generates the FMCW signal based on the received parameter information, and sends the FMCW signal.