Transceiver RF Modeling for Indoor Location Attribute Estimation
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Solution Overview
Problem
Conventional localization technologies relying on GPS signals suffer from inaccuracies in indoor environments due to signal obstruction, leading to poor location tracking.
Innovation Solution
A transceiver system comprising radiating and non-radiating blocks, which generates a device model to estimate location attributes of another transceiver with improved accuracy by modeling RF signal paths through non-radiating components, using scattering parameters and radiation patterns to correlate incoming RF signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS signals are used for location tracking, then location tracking can be achieved, but accuracy deteriorates in indoor environments due to signal obstruction
Solution Approach 1:
The patent introduces device models as intermediary representations that capture the electromagnetic behavior of transceiver components. These models serve as mediators between the physical transceiver hardware and the location estimation algorithm, enabling accurate location determination without relying on external GPS signals. The device models incorporate scattering parameters and radiation patterns that characterize how RF signals interact with the transceiver's radiating and non-radiating blocks.
Solution Approach 2:
The patent creates virtual copies of the transceiver's electromagnetic behavior through device models. Instead of physically measuring signal characteristics in complex indoor environments, the system uses pre-computed or measured device models that replicate the transceiver's RF signal transmission and reception characteristics. These models include scattering parameters describing signal interactions with non-radiating components and radiation patterns describing signal propagation from radiating components.
2Measurement precision
If device models incorporating non-radiating components are used, then location estimation accuracy improves, but device complexity increases
Solution Approach 1:
The patent divides the transceiver into distinct functional blocks: radiating blocks that generate and receive RF signals, and non-radiating blocks that process these signals. The device model is then segmented into corresponding components - scattering parameters for non-radiating components and radiation patterns for radiating components. This segmentation allows complex electromagnetic behavior to be broken down into manageable, physically interpretable parts that can be measured or simulated independently.
Solution Approach 2:
The patent performs preliminary characterization of the transceiver's electromagnetic properties by measuring or simulating scattering parameters and radiation patterns before actual location estimation occurs. These device models are pre-computed and stored, allowing the location estimation system to avoid the complexity of real-time electromagnetic analysis. The preliminary action of characterizing the transceiver's RF behavior enables faster, more accurate location estimation during actual operation.
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
Enhances location estimation accuracy by interpreting RF signals to determine the location and angle of a transceiver with improved precision in indoor environments.
Implementation Method 1
The radiating block includes an antenna configured to radiate radio frequency (RF) signals in a transmitting mode of the transceiver or receive RF signals in a receiving mode of the transceiver
Data Source
AI summary
A transceiver includes a radiating block that radiates or receives radio frequency (RF) signals and a non-radiating block including non-radiating components that do not radiate RF signals. A device model of the transceiver is generated based on a combination of a model of the radiating block and the non-radiating block. The device model of the transceiver is used to estimate location attributes of other transceivers that transmit incoming RF signals to the modeled transceiver.