Wireless Position Estimation Using Base-Station DoA Feedback
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Solution Overview
Problem
Existing position estimation methods for mobile devices in wireless communication networks, such as drones, are inefficient due to high power consumption, processing complexity, and inaccuracy, especially in urban environments, and 3D beamforming in MIMO systems leads to communication degradation due to misalignment of mobile devices with beam lobes.
Innovation Solution
A mobile device sends a beacon signal with a unique identification, requesting information about its direction of arrival and location from a base station, which calculates and transmits this information back to the device, allowing it to estimate its position with reduced processing and energy consumption, while a base station can signal the direction of its beam lobe to improve communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing position estimation methods are used for mobile devices, then position estimation can be performed, but power consumption is high and processing complexity increases
Solution Approach 1:
The base station acts as an intermediary that performs the complex position estimation calculations on behalf of the mobile device. The mobile device only needs to transmit a beacon signal and receive assistance data, while the base station computes the position using its own antennas and signal processing capabilities, thereby reducing the mobile device's power consumption and processing burden.
Solution Approach 2:
The base station utilizes its own existing infrastructure (antennas, signal reception capabilities) to provide position estimation services to mobile devices. The system leverages the base station's inherent ability to receive and process signals to perform calculations that would otherwise burden the mobile device.
2Measurement precision
If existing position estimation methods are used for mobile devices, then position estimation can be performed, but processing complexity increases
Solution Approach 1:
The base station serves as an intermediary that handles all complex signal processing and position calculation tasks. The mobile device's role is simplified to transmitting a beacon signal and receiving assistance data, eliminating the need for complex onboard processing while maintaining accurate position estimation through the base station's computational resources.
Solution Approach 2:
The complex position estimation processing is extracted from the mobile device and relocated to the base station. This separation allows the mobile device to remain simple while the base station, with its greater computational resources, handles the sophisticated signal processing required for accurate positioning.
3Productivity
If 3D beamforming is used in MIMO systems, then communication capacity is improved, but communication quality degrades due to misalignment of mobile devices with beam lobes
Solution Approach 1:
The mobile device receives feedback information from the base station regarding the direction of arrival of its beacon signal and the orientation of beam lobes. Using this feedback, the device can adjust its orientation or position to align with the beam lobes, ensuring maintained communication quality while benefiting from the high capacity of 3D beamforming.
Solution Approach 2:
The system dynamically adjusts the alignment between mobile devices and beam lobes based on real-time conditions. The base station provides directional information that allows mobile devices to adapt their orientation, creating a dynamic system that maintains optimal alignment despite the directional nature of beamformed signals.
Data Source
AI summary
An apparatus includes an antenna and a transceiver. The transceiver transmits a first signal via the antenna, the first signal including a unique identification of the apparatus and a request for receive information about the first signal at a receiver. The transceiver receives from the receiver a second signal via the antenna, the second signal including first information about a direction of arrival (DoA) of the first signal at the receiver and second information indicative of a location of the receiver.