Ranging Accuracy via Virtual Wideband Spectrum Signal Processing
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Solution Overview
Problem
Current ranging methods in radio frequency systems face accuracy issues due to distortion in time-domain signal curves, making it difficult to accurately detect fault points.
Innovation Solution
A ranging method and apparatus that involves sending a ranging signal, receiving a first spectrum signal, and determining a second spectrum signal with a broader spectral width, which includes mathematical modeling using finite impulse response recursive filters to enhance the accuracy of distance estimation of reflection points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional ranging method using a narrowband spectrum signal is used, then the hardware cost is reduced, but the ranging accuracy deteriorates due to distorted time-domain signal curves
Solution Approach 1:
The patent transforms the narrowband spectrum signal into a wideband spectrum signal by constructing a second spectrum signal with extended frequency range. This dimensional expansion in the frequency domain enables sharper wave peaks in the time domain, thereby improving ranging accuracy without requiring complex hardware modifications
Solution Approach 2:
The patent changes the spectral width parameter of the signal by constructing a second spectrum signal with a broader frequency range than the original first spectrum signal. This parameter change from narrowband to wideband enables more accurate time-delay estimation while maintaining system simplicity
2Measurement precision
If a wideband spectrum signal is used to improve ranging accuracy, then the spectral width is increased, but the spectral management restrictions are intensified
Solution Approach 1:
The patent introduces a mathematical model as an intermediary that processes the received first spectrum signal to construct a second spectrum signal with extended bandwidth. This intermediary processing approach achieves wideband effects through signal processing rather than requiring actual wideband hardware, thereby avoiding spectral management restrictions
Solution Approach 2:
The patent creates a virtual wideband spectrum signal (second spectrum signal) that copies and extends the characteristics of the received narrowband signal. By constructing this virtual wideband signal through mathematical modeling, the system achieves the benefits of wideband ranging without occupying additional spectral resources
3Measurement precision
If the spectral width of the spectrum signal is increased, then the wave peak sharpness in time-domain signal is improved, but the signal processing complexity increases
Solution Approach 1:
The patent performs preliminary mathematical modeling to construct the second spectrum signal with extended bandwidth before time-domain transformation. This preliminary action in the frequency domain prepares the signal to produce sharper wave peaks after inverse Fourier transformation, improving detection precision while managing processing complexity through structured modeling
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
This approach improves ranging accuracy by generating sharper wave peaks in the time-amplitude curve, allowing for more precise detection of reflection points and reducing hardware costs and spectral management restrictions.
Implementation Method 1
a series of test signals are usually transmitted into the radio frequency system. The test signal is reflected after arriving at the fault point
Implementation Method 2
performing mathematical modeling on the first spectrum signal by using a forward finite impulse response recursive filter
Data Source
AI summary
A ranging method and apparatus are provided. The method includes: sending a ranging signal to a measured system, where the measured system includes at least one reflection point (S110); receiving a first spectrum signal obtained after the ranging signal is reflected by the at least one reflection point (S120); determining a second spectrum signal according to the first spectrum signal, where the second spectrum signal includes the first spectrum signal, and a spectral width of the second spectrum signal is greater than a spectral width of the first spectrum signal (S130); and estimating a distance of the at least one reflection point according to the second spectrum signal (S140). According to the ranging method and apparatus, a distance of a reflection point in a measured system can be determined in a relatively accurate manner, so as to improve ranging accuracy.