Multi-Antenna Signal Cancellation for Wireless Interference
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Solution Overview
Problem
The simultaneous use of multiple radios in wireless devices often leads to interference and performance degradation due to shared or overlapping spectrum, with existing solutions like time-sharing reducing performance for certain devices like network routers and access points.
Innovation Solution
A multi-antenna system with at least three antennas and two radios, where the first and second antennas are geometrically positioned to cancel each other's signals at a physical portion, allowing the third antenna to communicate without interference, using a signal splitter to split and process signals with adjusted parameters to minimize detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radios operate simultaneously in wireless devices, then communication capability is improved, but interference and performance degradation occur due to shared spectrum
Solution Approach 1:
The patent divides the wireless communication system into multiple antenna elements (at least three antennas) that can be independently controlled. By segmenting the transmission function across multiple antennas with different geometric positions, the system can create spatial nulls to cancel interference while maintaining simultaneous operation of multiple radios
Solution Approach 2:
The patent applies different signal characteristics to different antenna elements based on their geometric positions. Each antenna transmits signals with specific amplitude and phase relationships tailored to its location, creating localized interference cancellation zones at specific spatial positions where other antennas need to operate
2Object-affected harmful factors
If time-sharing approach is used to avoid interference, then interference is reduced, but performance of network routers and access points deteriorates
Solution Approach 1:
The patent enables continuous simultaneous operation of multiple radios by using spatial interference cancellation through geometrically positioned antennas. Instead of alternating transmission in time (time-sharing), the system maintains continuous transmission from multiple radios at the same time, with the antenna geometry ensuring interference cancellation at critical positions
Solution Approach 2:
The patent transitions from temporal domain interference management (time-sharing) to spatial domain interference management. By utilizing the spatial dimension through geometrically positioned antennas with different locations and orientations, the system cancels interference in space rather than managing it through time division, enabling simultaneous operation
3Productivity
If multiple antennas are used for simultaneous transmission, then throughput is improved, but signal interference at receiver positions increases
Solution Approach 1:
The patent uses the geometric positioning of multiple antennas to create counteracting signal fields. Antennas are positioned and configured such that their transmitted signals create destructive interference (counterweight) at specific receiver positions, canceling out harmful interference while maintaining useful signal transmission for simultaneous multi-radio operation
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 configuration reduces the need for radio coordination, increases throughput by allowing simultaneous operation without time division, and enhances polarization diversity while maintaining omnidirectional coverage.
Implementation Method 1
A first antenna of the antennas and a second antenna of the antennas can be geometrically positioned such that signals they emit cancel each other out at a physical portion of the system comprising a third antenna of the antennas
Data Source
AI summary
The present disclosure is directed to antenna arrangements. In particular, an arrangement can include at least three antennas. A first and second of the antennas can be positioned such that signals they emit cancel each other out at a physical space comprising a third of the antennas. Additionally or alternatively, an arrangement can include at least two antennas. A first of the antennas can comprise at least two signal-emitting portions positioned such that signals they emit cancel each other out at a physical space comprising a second of the antennas.