Radar Sensor Full-Duplex Communication Using Mixed FM Signals
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Solution Overview
Problem
Existing radar sensor communication is limited to half-duplex mode, preventing simultaneous data transmission and reception, and is susceptible to interference.
Innovation Solution
A method and system enabling full-duplex communication between radar sensors using frequency-modulated data signals, where the signals are mixed, filtered, and processed to separate and determine data bits from both participants, utilizing voltage-controlled oscillators and low-pass filters to extract low-frequency components containing all transmitted data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If half-duplex mode is used for radar sensor communication, then device complexity is reduced, but productivity is limited because simultaneous data transmission and reception cannot occur
Solution Approach 1:
The system dynamically switches between transmission and reception modes for different frequency bands, allowing the radar sensor to adapt its communication mode based on the operational requirements of each band, thereby achieving full-duplex capability without requiring complete system redesign
Solution Approach 2:
The communication system is segmented into multiple frequency bands, with each band operating in independent half-duplex mode. This segmentation allows simultaneous transmission and reception across different bands, achieving full-duplex functionality while maintaining the simplicity of half-duplex operation in each segment
2Reliability
If frequency modulation is used for data transmission, then reliability is improved due to higher dynamic range and interference resistance, but device complexity increases due to additional modulation components
Solution Approach 1:
The frequency modulation system is integrated into the existing radar sensor architecture, allowing the same hardware components to serve both radar measurement functions and data communication functions, thereby achieving reliable communication without proportionally increasing device complexity
Solution Approach 2:
The data communication function is merged with the radar measurement function by using the radar signal itself as the carrier for frequency modulation. This integration eliminates the need for separate communication hardware, reducing overall system complexity while maintaining the reliability benefits of frequency modulation
3Productivity
If full-duplex communication is implemented between radar sensors, then productivity is enhanced through simultaneous transmission and reception, but device complexity increases due to signal mixing and processing requirements
Solution Approach 1:
The signal processing system dynamically adjusts its operation based on the received signal characteristics, switching between different processing modes to optimize performance while managing complexity through adaptive rather than static processing architectures
Solution Approach 2:
The full-duplex signal processing is segmented into separate transmission and reception processing chains, each handling specific frequency bands independently. This segmentation allows complex full-duplex operation to be managed through simpler, independent processing modules rather than a monolithic complex system
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables simultaneous data transmission and reception between radar sensors, enhancing robustness against interference and allowing communication over longer distances.
Implementation Method 1
The first data is contained as a binary bit sequence with first bits in the frequency-modulated first data signal
Implementation Method 2
the first data signal and the second data signal are mixed to form a first mixed signal, and the second bits of the second data signal are determined by evaluating a mixed spectrum of the first mixed signal
Data Source
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AI summary
The invention relates to a method for data communication between a first subscriber (11) and a second subscriber (12), wherein the first subscriber (11) transmits a frequency-modulated first data signal (S1) containing first data, which the second subscriber (12) receives; and the second subscriber (12) transmits a frequency-modulated second data signal (S2) containing second data, which the first subscriber (11) receives; wherein the first data are contained in the frequency-modulated first data signal (S1) as a binary bit sequence containing first bits (B1), and the second data are contained in the frequency-modulated second data signal (S2) as a binary bit sequence containing second bits (B2); wherein the first data signal (S1) and the second data signal (S2) are mixed to produce a first mixed signal (X1); and an evaluation of a mix spectrum of the first mixed signal (X1) and the first bits (B1) of the first data signal (S1) is used to ascertain the second bits (B2) of the second data signal (S2); and wherein the first data signal (S1) and the second data signal (S2) are mixed to produce a second mixed signal (X2); and an evaluation of a mix spectrum of the second mixed signal (X2) and the second bits (B2) of the second data signal (S2) is used to ascertain the first bits (B1) of the first data signal (S1). The invention also relates to a system for data communication, comprising at least one first subscriber (11) and one second subscriber (12), wherein the first subscriber (11) transmits a frequency-modulated first data signal (S1) containing first data, which the second subscriber (12) receives, and the second subscriber (12) transmits a frequency-modulated second data signal (S2) containing second data, which the first subscriber (11) receives, the first subscriber (11) and the second subscriber (12) being designed to carry out the method according to the invention.