High Resolution Distance Velocity Measurement Using Reference Matrix Matching
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Solution Overview
Problem
Existing distance and speed measurement systems face challenges in accurately determining distances and relative speeds, especially in complex multipath environments and with moving objects, while operating with limited bandwidth and high accuracy.
Innovation Solution
A method using electromagnetic signals transmitted between objects, involving multiple executions of signal transmission and reception at different frequencies, with phase information processing to form a measured value matrix, which allows for the determination of distance and speed by comparing with reference matrices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase-based distance measurement is used, then measurement precision is improved, but reliability deteriorates in multipath environments
Solution Approach 1:
The patent combines phase-based distance measurement with signal strength (RSSI) based distance estimation. By merging these two different measurement approaches, the system achieves both high precision (from phase measurement) and reliability in multipath environments (from RSSI measurement which is less susceptible to multipath effects). The final distance estimate is derived by fusing results from both methods.
Solution Approach 2:
The patent introduces an intermediary approach by using multiple measurement methods as mediators between the direct phase measurement and the final distance determination. The RSSI-based estimation acts as an intermediary that provides a reliable baseline, while phase measurement refines the precision. This intermediary layer resolves the contradiction by allowing the system to switch or combine methods based on environmental conditions.
2Measurement precision
If high bandwidth signals are used, then measurement precision is improved, but bandwidth consumption increases
Solution Approach 1:
The patent applies partial action by using a limited set of specific frequencies (e.g., 5 frequencies spaced 25 kHz apart) rather than sweeping through a wide bandwidth. This partial frequency sampling provides sufficient measurement precision for distance and velocity while consuming significantly less bandwidth than a full-spectrum approach would require.
Solution Approach 2:
The patent changes the frequency parameter by using multiple discrete frequency points rather than continuous frequency sweeping. By selecting specific frequency values (e.g., within 400 MHz to 8 GHz range with maximum 200 MHz bandwidth), the system achieves high measurement precision through frequency diversity while maintaining controlled bandwidth consumption.
3Reliability
If multiple frequencies are used, then measurement reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the frequency spectrum into discrete, manageable frequency points (e.g., 5 specific frequencies). Instead of dealing with continuous frequency variation, the system divides the bandwidth into separate frequency channels, making the multi-frequency approach more manageable and reducing processing complexity while maintaining reliability benefits.
Solution Approach 2:
The patent simplifies device complexity by changing the frequency parameter from continuous to discrete values. By using a fixed set of frequency points with defined spacing (e.g., 25 kHz intervals), the system reduces the complexity of frequency management, signal generation, and processing while still achieving improved measurement reliability through frequency diversity.
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 high-resolution, accurate distance and speed measurements even in complex environments and with moving objects, using a system that processes phase information and amplitude to form a measured value matrix for precise calculations.
Implementation Method 1
high-resolution determination of a distance and/or a relative velocity between a first object and a second object by means of electromagnetic signals transmitted between the first and the second object
Implementation Method 2
determine, with high accuracy, particularly low, relative velocities
Implementation Method 3
providing at least one first phase information determined from or by means of at least one determined phase position of the received first signal
Data Source
Figure 1
AI summary
The present invention relates to a method and a system for high-resolution distance and/or velocity measurement between two objects using electromagnetic waves. The object of the present invention is to further develop such systems and methods in such a way that measurements are possible reliably, simply, quickly, with low bandwidth, and with high accuracy, even in complex multipath environments and/or with moving objects. This object is achieved by determining a presumed distance and/or presumed relative velocity between the first and second object from a measurement object by comparing the measurement object with a set and/or selection of stored and/or calculated reference measurement objects.The reference objects represent different distances and different relative speeds, with each reference object being assigned a distance and a speed. The assumed distance and/or speed is that assigned to the stored and/or calculated reference object that best matches the measured object, is closest to it, and/or is most similar to it.