Single BTS CPE Location Detection via Antenna Array DOA
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Solution Overview
Problem
Conventional wireless communication systems require multiple base transceiver stations (BTSs) and a back-end server to determine the GPS location of a customer premises equipment (CPE), which is inefficient and can be improved by using only one BTS with an array of antennas to accurately calculate the location.
Innovation Solution
A system and method that utilize a plurality of antennas in a BTS to extract timing and signal information, calculate the distance and direction of arrival, and determine the GPS coordinates of a CPE, allowing for location-based services with enhanced accuracy using a single BTS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple BTSs and a back-end server are used to determine GPS location of CPE, then location determination can be achieved, but system complexity and resource requirements increase
Solution Approach 1:
The patent extracts the location determination function from a distributed multi-BTS system and concentrates it in a single BTS equipped with an antenna array. By using direction of arrival (DOA) estimation through signal processing of signals received from multiple antennas, the system eliminates the need for multiple BTSs and back-end servers, thereby reducing system complexity while maintaining location determination capability
Solution Approach 2:
The patent introduces an antenna array as an intermediary component within the single BTS. The multiple antennas work together to provide spatial diversity and enable DOA estimation through signal processing, serving as the mediator that allows location determination without requiring multiple BTSs. The antenna array transforms the physical signal environment into directional information that enables precise location tracking
2Measurement precision
If multiple BTSs are deployed to track CPE movement, then location accuracy can be maintained, but network resource consumption increases
Solution Approach 1:
The patent merges the location determination functionality that was previously distributed across multiple BTSs into a single BTS with an antenna array. By combining the spatial information from multiple antennas in one location, the system achieves the same location tracking capability without requiring multiple geographically distributed BTSs, thereby reducing the quantity of network infrastructure needed
3Productivity
If a single BTS with antenna array is used to determine CPE location, then system efficiency improves, but signal processing complexity increases
Solution Approach 1:
The patent replaces the mechanical approach of using multiple physically distributed BTSs with a signal processing approach using an antenna array and DOA estimation algorithms. Instead of relying on geometric trilateration from multiple stations, the system uses electromagnetic signal characteristics (phase differences, amplitude ratios) processed through algorithms like MUSIC or ESPRIT to determine direction and location, thereby improving efficiency while managing complexity through computational methods
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 enables more efficient and accurate determination of GPS coordinates for a CPE using a single BTS, facilitating innovative services and improving network resource management without the need for additional BTSs, while allowing for collaborative location reporting among multiple BTSs for enhanced accuracy.
Implementation Method 1
A plurality of antennas in a base transceiver station receives signals transmitted from a customer premises equipment
Implementation Method 2
A timing detection module extracts the timing offset from the receiving signals and a first calculation module calculates the distance between the BTS and the CPE based on the timing offset
Implementation Method 3
A signal detection module detects magnitudes and phases of the receiving signals and a second calculation module determines a dominant beam according to the antenna pattern and calculates the direction of arrival of the dominant beam
Data Source
AI summary
A system and method are provided for detecting locations of a customer premises equipment in a wireless communication system with one or more base transceiver stations and one is efficient. A plurality of antennas in a base transceiver station (BTS) receives signals transmitted from a customer premises equipment (CPE). A timing detection module extracts the timing offset from the receiving signals and a first calculation module calculates the distance between the BTS and the CPE based on the timing offset. A signal detection module detects magnitudes and phases of the receiving signals and a second calculation module determines a dominant beam according to the antenna pattern and calculates the direction of arrival of the dominant beam. A third calculation module calculates the location of the CPE relative to the BTS based on the distance and the direction of arrival.