Distributed Antenna System with Configurable Signal Delays for Indoor Positioning
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Solution Overview
Problem
Existing techniques for determining the position of wireless devices in dense areas, such as high-rise buildings, are inadequate and fail to provide accurate location information.
Innovation Solution
A distributed antenna system (DAS) with a channel controller that introduces configurable delays to distinguish signals from different antennas, allowing for accurate location determination using network-based and handset-assisted methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing positioning techniques are used in dense areas, then device location can be determined in open spaces, but accurate location information cannot be obtained in dense areas such as high-rise buildings
Solution Approach 1:
The system divides the dense area into multiple coverage zones, each served by a distributed antenna. By segmenting the service area and using multiple antennas with different configurable delays, the system can distinguish signals from different locations even in dense environments like high-rise buildings, thereby improving location determination accuracy in previously unserviceable areas
Solution Approach 2:
The patent introduces a lookup database as an intermediary component that stores pre-calculated location information based on signal characteristics. This database acts as a mediator between the received signals and the final location determination, enabling accurate positioning in dense areas by matching observed signal patterns against known configurations
2Measurement precision
If multiple antennas are used to improve location accuracy in dense areas, then positioning precision increases, but system complexity increases
Solution Approach 1:
The system manages complexity by dynamically adjusting the delay parameter for each antenna rather than requiring complex hardware modifications. By changing the temporal parameter (delay) of signals from different antennas, the system achieves precise location determination while maintaining relatively simple antenna infrastructure
Solution Approach 2:
The patent uses a lookup database that stores pre-computed location information representing different spatial configurations. Instead of requiring complex real-time calculations, the system copies and matches against pre-stored signal patterns, thereby simplifying the processing complexity while maintaining high positioning accuracy
3Measurement precision
If configurable delays are introduced to distinguish signals from different antennas, then signal identification accuracy improves, but system complexity increases
Solution Approach 1:
The channel controller applies periodic or systematic delay configurations to different antenna signals in a structured manner. This periodic introduction of delays creates distinguishable signal patterns that improve identification accuracy while following a systematic approach that manages controller complexity
Solution Approach 2:
The system performs preliminary configuration of delay values in the channel controller before signal processing. By pre-setting the delay parameters based on known antenna locations and characteristics, the system simplifies real-time operation while maintaining accurate signal source identification
Data Source
AI summary
System, devices, and methods facilitate determining positioning using distributed antenna system with service availability monitoring. Positioning methods include network based methods and handset assisted methods in addition to a monitoring system to report any service outage and possible location information loss. The system provides location information also at handset only level through application or apps and operating systems with online and off-line access to location database data. A combined monitoring system that monitors antenna output power for mobile coverage and service availability helps also in monitoring the availability of the localization system and dynamic update of lookup information. Monitoring system provides also asset tracking and service analytics features for the active or passive distributed antenna system.