Radio Guidance System Using Signal Gradient Vectors
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Solution Overview
Problem
Existing methods for detecting the proximity of a target radio transmitter face challenges due to high infrastructure costs, energy inefficiency, and inaccuracies in cooperative environments, especially when the receiver and transmitter are in different environments, and are affected by uncontrollable fluctuations in signal propagation.
Innovation Solution
A method and system that use a combination of signal modulation diversity and statistical analysis of received signal power levels and signal-to-noise ratios to calculate a proximity index, guiding the user equipment towards the radio transmitter by determining the gradient vector of this index, allowing for accurate location and guidance across various environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If infrastructure-based geolocation systems (GPS, GLONASS, GALILEO, BeiDou, terrestrial sensor networks, mobile cellular networks, access points) are used to locate the target connected object and user equipment, then location tracking capability is improved, but infrastructure costs and energy consumption increase significantly
Solution Approach 1:
The patent extracts the location determination function from the infrastructure and relocates it to the user equipment. Instead of relying on external infrastructure to provide location data, the system uses the user equipment's radio receiver to measure signal parameters (RSSI, SNR) from the target object's transmitter and autonomously calculate proximity and guidance information, eliminating the need for continuous infrastructure-based tracking
Solution Approach 2:
The user equipment performs self-service location determination by using its own radio receiver to measure signal characteristics and compute proximity metrics. The system serves itself by leveraging the existing radio communication channel between the target object's transmitter and the user equipment's receiver, without requiring additional infrastructure services
2Measurement precision
If infrastructure-based geolocation systems are deployed to ensure simultaneous localization of target and user, then location accuracy is improved, but infrastructure costs increase
Solution Approach 1:
The patent removes the location determination function from the infrastructure and embeds it in the user equipment. The system extracts location information from the radio signal characteristics (RSSI, SNR measurements) rather than relying on infrastructure-provided coordinates, thereby eliminating the need for costly simultaneous localization infrastructure
Solution Approach 2:
The system creates a virtual representation of the physical environment by mapping signal strength and quality measurements to proximity and guidance information. Instead of using physical infrastructure markers, the patent copies spatial relationships through radio signal characteristics, enabling location determination through signal processing rather than physical infrastructure
3Use of energy by moving object
If received signal strength (RSS) or signal-to-noise ratio (SNR) is used to estimate distance and detect proximity, then infrastructure costs are reduced and energy efficiency is improved, but measurement precision deteriorates due to uncontrollable fluctuations in signal propagation
Solution Approach 1:
The patent combines multiple signal measurement parameters (RSSI and SNR) into a unified proximity index. By merging these complementary measurements and processing them together through statistical analysis and signal processing algorithms, the system achieves more robust and accurate proximity detection than using either parameter alone, compensating for the limitations of individual measurements
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring signal parameters and adjusting proximity estimates based on observed fluctuations. The user equipment performs successive measurements and uses statistical processing to filter out noise and multipath effects, providing feedback-driven refinement of proximity and guidance information to maintain accuracy despite propagation variations
4Device complexity
If single modulation and single power level transmission is used by the radio transmitter, then device complexity is reduced, but adaptability to different environments and guidance accuracy deteriorates
Solution Approach 1:
The patent applies local quality by configuring different modulation schemes and power levels for different transmission scenarios. The radio transmitter uses diverse modulation formats (e.g., BPSK, QPSK, QAM) and power levels adapted to specific propagation conditions and distance ranges, optimizing signal detectability and measurement accuracy for each local environment rather than using a uniform transmission configuration
Solution Approach 2:
The system implements dynamic transmission by adjusting modulation and power level configurations based on environmental conditions and user equipment position. The radio transmitter dynamically selects appropriate transmission parameters to maintain optimal signal characteristics across varying distances and propagation conditions, enabling the system to adapt to changing environments rather than relying on static transmission settings
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 reduces infrastructure costs, improves energy efficiency, and enhances the accuracy of radio guidance and location, providing precise direction and distance estimation regardless of environmental conditions.
Implementation Method 1
a radio transmitter 1 to emit a plurality of signals 11-14
Implementation Method 2
measurement, by the user equipment, of the power level of the received signal
Implementation Method 3
measurement, by the user equipment, of the power level of the received signal and the signal-to-noise ratio
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The invention relates to a proximity detection and radio guidance system comprising - a radio transmitter capable of transmitting a plurality of differently spread signals; - a user device capable of • measuring, at different positions with respect to the radio transmitter, the power of the received signal and the signal-to-noise ratio relating to each transmitted signal of said plurality of signals; • calculating a first statistical value of the powers of the received signals at each measurement position; • calculating a second statistical value of the signal-to-noise ratios relating to the signals received at each measurement position; • calculating, on the basis of the calculated statistical values, a proximity index of the radio transmitter from each position; and • calculating a gradient vector of the proximity index.