Wireless Positioning Signal Segmentation for Accuracy and Power
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Solution Overview
Problem
Existing positioning systems face limitations in accuracy, signal interference, and power consumption, necessitating an improved method for providing high accuracy position determination using a wide area transmitter array.
Innovation Solution
A method involving a Wide Area Positioning System (WAPS) that uses a transmitter array to send range and hybrid blocks with positioning data, utilizing pseudo-noise sequences and error control coding, to enhance location determination accuracy and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing positioning systems (GPS, LORAN) are used, then position information can be provided, but location accuracy is limited and signal interference occurs
Solution Approach 1:
The positioning signal is segmented into distinct range blocks and hybrid blocks transmitted in separate time slots. Range blocks contain dedicated ranging signals for accurate distance measurement, while hybrid blocks contain positioning data and other information. This segmentation allows the receiver to process different signal types optimally, improving location accuracy while reducing interference between signal components.
Solution Approach 2:
The system employs periodic transmission of range blocks and hybrid blocks in a structured frame format with predefined slots. This periodic action enables the receiver to anticipate signal arrivals, synchronize timing, and process signals efficiently. The regular pattern helps distinguish desired signals from interference and improves measurement precision through consistent timing references.
2Reliability
If continuous positioning signals are transmitted, then location tracking is maintained, but device power consumption increases
Solution Approach 1:
Instead of continuous transmission, the system uses periodic transmission of positioning signals structured in frames with predefined slots. The receiver can enter low-power states between signal arrivals, waking only to process range blocks and hybrid blocks at expected times. This maintains reliable location tracking while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The system transmits preliminary synchronization information and timing references in the periodic signal structure, allowing the receiver to prepare and synchronize in advance. This preliminary action enables the receiver to efficiently process subsequent positioning data without requiring continuous high-power operation, thus maintaining tracking reliability while reducing energy use.
3Measurement precision
If positioning data is transmitted frequently, then location accuracy is improved, but signal interference and power consumption increase
Solution Approach 1:
Positioning information is segmented into essential ranging signals in range blocks and supplemental positioning data in hybrid blocks. The ranging signals provide the core accuracy information needed for position determination, while hybrid blocks contain additional data that can be processed less frequently. This segmentation allows the system to maintain high accuracy through frequent ranging signal transmission while reducing overall power consumption by transmitting full positioning data sets less frequently.
Data Source
AI summary
Devices, systems, and methods for sending positional information from transmitters/beacons. In one implementation a transmitter generates a range block including a ranging signal and a hybrid block including positioning data, and sends the range block and hybrid block at different times. A user device may receive signals from a plurality of transmitters and generates position/location information using trilateration and measured altitude information in comparison with transmitter altitude information.