Wide Beamwidth Spatial Filters for Coverage Enhancing Devices
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Solution Overview
Problem
Existing wireless communication systems face challenges in configuring spatial filters at coverage enhancing devices (CEDs) to achieve wide beamwidths, which is essential for maintaining connectivity when the receiver's position is uncertain or changing.
Innovation Solution
The implementation of techniques to calculate and activate wide-beamwidth spatial filters at CEDs by applying phase shifts to multiple antenna elements, using circular polarization and coordinating control signaling between transmitter, receiver, and CED to support multiple spatial filters, allowing for a single data stream across orthogonal polarization components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If narrow beamwidth spatial filters are used at CED, then signal gain and transmission reliability are improved, but coverage area and adaptability to unknown receiver positions deteriorate
Solution Approach 1:
The patent implements dynamic beamwidth adaptation by enabling the CED to switch between narrow beamwidth spatial filters (for high gain when receiver position is known) and wide beamwidth spatial filters (for broader coverage when receiver position is unknown or changing). This dynamic reconfiguration resolves the contradiction by allowing the system to adapt its beam characteristics based on real-time operational requirements and receiver position information.
2Adaptability or versatility
If wide beamwidth spatial filters are used at CED, then coverage area and adaptability to unknown receiver positions are improved, but signal gain and transmission reliability deteriorate
Solution Approach 1:
The system dynamically adjusts beamwidth by selecting appropriate spatial filters from a codebook based on feedback information about receiver position accuracy. When the receiver position is known with high accuracy, narrow beamwidth filters provide high signal gain. When position is unknown or expected to change, wide beamwidth filters provide broader coverage, thus resolving the contradiction through dynamic adaptation.
3Adaptability or versatility
If circular polarization with single data stream is used, then compatibility with wide beamwidth spatial filters is improved, but data transmission capacity deteriorates
Solution Approach 1:
The patent changes the polarization parameter from linear to circular polarization when wide beamwidth spatial filters are activated. Circular polarization with a single data stream ensures compatibility with the wide beamwidth filter characteristics, even though it reduces data transmission capacity compared to using multiple data streams with linear polarization. This parameter change resolves the contradiction by prioritizing filter compatibility over maximum capacity.
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 enhances wireless transmission reliability and coverage by enabling wide beamwidth spatial filters, effectively managing beam acquisition and broadcasting operations, even when the receiver's position is unknown or changing.
Implementation Method 1
The CED can be implemented by an array of antennas that impose variable phase shifts onto electromagnetic waves of incident signals
Implementation Method 2
The concept of CEDs thus generally includes both reflective surfaces reflecting incident electromagnetic waves, as well as transmissive surfaces
Implementation Method 3
coordinated activation of—first—the WBW spatial filter, —second—the transmitter device using a circular polarization to transmit electromagnetic waves
Data Source
AI summary
Various aspects of the disclosure pertain to filter management procedures at coverage enhancing devices. Various examples relate to supporting spatial filters that profilter management for wide output beams at coverage enhancing devicesvide a wide beamwidth of the output beam.