Decorrelated Electromagnetic Wave Directional Analysis
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Solution Overview
Problem
Existing methods for determining the direction of incidence of electromagnetic waves are inefficient and require high effort, especially in environments with multipathing, and are limited by the availability of a broad frequency spectrum.
Innovation Solution
The method involves using two stationary emitting devices with a minimum distance greater than the wavelength error and different polarization characteristics to decorrelate wave components, allowing for analysis of incidence directions based on phase and amplitude differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency-dependent phase shift evaluation is used to determine direction of incidence in multipathing environments, then directional analysis becomes possible, but the method requires a large number of frequencies and high component accuracy, leading to high effort and complexity
Solution Approach 1:
The patent changes the parameter used for decorrelation from frequency to spatial position. Instead of using multiple frequencies to achieve decorrelation, the invention uses two transmitting devices at different spatial positions. This spatial parameter change allows directional analysis in multipathing environments without requiring multiple frequencies or high component accuracy, thereby reducing method complexity while maintaining reliability
Solution Approach 2:
The patent introduces an intermediary approach by using the spatial position of transmitting devices as a mediating factor. The different positions of the two transmitting devices create decorrelated propagation paths that serve as intermediaries to distinguish direct waves from reflected waves, avoiding the need for complex frequency-based methods
2Reliability
If a large number of frequencies are used for directional analysis in multipathing environments, then directional determination becomes possible, but the method is limited to frequency ranges with sufficient spectrum availability and requires high effort
Solution Approach 1:
The patent changes the operating parameter from frequency domain to spatial domain. By using two transmitting devices at different positions instead of multiple frequencies, the method becomes adaptable to any frequency range without being constrained by spectrum availability, thereby improving versatility while maintaining reliable directional determination
3Reliability
If the distance between transmitting devices is increased to improve decorrelation, then directional analysis in multipathing becomes possible, but the angular divergence at the receiving point increases, reducing accuracy
Solution Approach 1:
The patent optimizes the spatial parameter by positioning the two transmitting devices at a specific distance from each other. This distance is sufficient to create decorrelated propagation paths for distinguishing direct and reflected waves, yet small enough to maintain small angular divergence at the receiving point, thereby achieving both reliable decorrelation and high measurement precision
Solution Approach 2:
The patent employs a dynamic evaluation method that processes signals from two transmitting devices to separately identify direct waves and reflected waves. This dynamic signal processing approach allows the system to achieve effective decorrelation without requiring large spatial separation, thus maintaining high angular resolution
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 enables accurate determination of wave incidence directions with reduced effort and improved angular resolution, even in complex environments without requiring a wide frequency spectrum.
Implementation Method 1
emission of a first wave from a first emitting device at a first location and reception of the wave portions of the first wave radiated
Implementation Method 2
the emitting devices have a different emission characteristic in relation to the polarization
Implementation Method 3
evaluation of the received signals, with the received wave components being separated according to different directions of incidence of the wave components and/or determining a number of different directions of incidence from which the received wave components were transmitted, this is done by analyzing the phase differences and/or amplitudes of the signals
Data Source
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AI summary
The method involves sandblasting an electromagnetic wave (11) of a radiation device (3) at a certain location (1). Incident wave components of the wave are received at another location (2) by two receiving devices (5,6). Another electromagnetic wave (12) is sandblasted at another radiation device at the former location. Incident wave components of the latter wave at the latter location, where the received signals are analyzed. Independent claims are also included for the following: (1) a system; and (2) two radiation devices for analysis of incident directions of waves.