Full Duplex Wireless Tunneling Using Polarization Isolation
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Solution Overview
Problem
Conventional wireless communication systems face inefficiencies in bandwidth, power, and cost when attempting to tunnel high data rate wired protocols like USB, HDMI, and DisplayPort due to challenges in implementing full duplex communication, which requires isolating weak signals from strong local transmitter signals.
Innovation Solution
A full-duplex wireless tunneling system using complementary antenna polarizations to enable simultaneous bi-directional communication at a common frequency, employing on-off keying modulation and clock/data recovery circuits to suppress self-interference and maintain data integrity, allowing for high data rates over short ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If frequency division duplex is used to separate transmit and receive signals, then self-interference is reduced, but bandwidth consumption doubles compared to unidirectional link
Solution Approach 1:
The patent segments the wireless communication into two independent unidirectional links operating at the same frequency. Each link is treated as a separate communication channel with its own transmitter and receiver, allowing simultaneous operation without mutual interference through spatial and polarization separation.
Solution Approach 2:
The patent introduces polarization as an additional dimension to separate transmit and receive signals. By using orthogonal polarizations (e.g., horizontal and vertical) for opposite directions of communication, the system achieves frequency-independent signal separation, effectively adding a spatial dimension to the communication channels.
2Object-affected harmful factors
If time division duplex is used to separate transmit and receive signals, then self-interference is reduced, but communication continuity is broken and complexity increases
Solution Approach 1:
The patent enables continuous transmission and reception in both directions simultaneously through full-duplex operation. Both links operate continuously without time slots or switching, eliminating gaps in communication and maintaining constant data flow in both directions at the same frequency.
3Quantity of substance
If full duplex communication is implemented at same frequency, then bandwidth efficiency is improved, but isolating weak received signal from strong local transmit signal becomes difficult
Solution Approach 1:
The patent uses polarization as an additional dimension to separate signals in the electromagnetic spectrum. By assigning orthogonal polarizations to transmit and receive antennas, the system creates independent communication channels that operate at the same frequency without interfering with each other, effectively adding a spatial dimension to signal separation.
Solution Approach 2:
The patent segments the wireless communication into two independent unidirectional links operating at the same frequency. Each link is treated as a separate communication channel with its own transmitter and receiver, allowing simultaneous operation without mutual interference through spatial and polarization separation.
4Ease of manufacture
If conventional wireless tunneling is used for high data rate protocols, then implementation is simplified, but power efficiency and cost increase
Solution Approach 1:
The patent changes key operating parameters including using on-off keying modulation instead of complex modulation schemes, operating at unlicensed frequencies (e.g., 60 GHz), and using simple envelope detection for demodulation. These parameter changes reduce complexity and power consumption while maintaining high data rate capability.
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
Enables efficient, cost-effective bi-directional communication at high data rates (at least 1 Gbps) over short ranges by effectively isolating signals and reducing self-interference, thus overcoming the limitations of conventional wireless communication systems.
Implementation Method 1
The local transmit antenna has a first polarization, and the local receive antenna has a second polarization different from the first polarization
Implementation Method 2
modulate a carrier signal using on-off keying to generate a local transmit wireless signal centered at a carrier frequency
Implementation Method 3
The on-off keying demodulator is configured to receive a local receive wireless signal centered at the carrier frequency from the local receive antenna concurrently with the local wireless transmitter transmitting the local transmit wireless signal, and demodulate the local receive wireless signal to a local receive baseband signal
Data Source
AI summary
Disclosed wireless tunneling system includes two wireless tunneling apparatuses that communicate with each other through the wireless link. A local wireless tunneling apparatus is coupled to a local processing apparatus through a wired connection and a remote wireless tunneling apparatus is coupled to the remote processing apparatus through another wired connection. The two processing apparatuses bi-directionally communicate with each other through the wireless link using the two wireless tunneling apparatuses as if the two processing apparatuses were connected through a wired connection.