Double Sideband Backscattering for IoT Carrier Aggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in achieving accurate positioning, especially with the increasing complexity of 5G networks and the need for efficient resource allocation.
Innovation Solution
The method involves a communication device receiving a reference signal from a communication station based on a reference component carrier, generating control signals using keying signals, and transmitting a backscattered signal. This backscattered signal is based on pairs of component carriers shifted by the keying frequencies, allowing for expanded bandwidth and improved positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional positioning methods are used in 5G networks, then positioning can be achieved, but resource allocation becomes inefficient and positioning accuracy deteriorates due to network complexity
Solution Approach 1:
The patent segments the positioning task by introducing separate keying signals independent from the main communication signal. The reference signal contains positioning information while the keying signal provides frequency shift for backscattering modulation, allowing independent optimization of positioning accuracy and communication functionality, thereby reducing the complexity burden on the communication system.
Solution Approach 2:
The patent introduces a backscattering mechanism as an intermediary between the reference signal and the positioning measurement. By modulating the reference signal through backscattering with frequency shifts from keying signals, the system creates a measurable frequency difference that directly indicates positioning information, simplifying the positioning process without increasing network complexity.
2Measurement precision
If bandwidth is expanded to improve positioning accuracy, then positioning precision improves, but resource allocation requirements increase at the transmitter side
Solution Approach 1:
The patent employs periodic keying signals that modulate the reference signal through backscattering. The frequency shifting is achieved through periodic modulation rather than requiring continuous wide bandwidth transmission. This allows positioning accuracy to be improved through frequency domain processing while maintaining efficient time-domain resource utilization.
Solution Approach 2:
The patent changes the parameter domain from time-frequency bandwidth to frequency shift through backscattering modulation. By transforming the positioning information into frequency shifts of the backscattered signal rather than requiring expanded bandwidth, the system achieves high positioning accuracy while maintaining efficient resource allocation. The keying frequencies provide the necessary frequency differentiation without increasing the transmitter bandwidth requirements.
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 reduces resource allocation for positioning at the transmitter side while enhancing positioning accuracy through expanded bandwidth, effectively addressing the challenges of 5G network complexity.
Implementation Method 1
Carrier aggregation at ambient internet of things (IOT) devices through double sideband backscattering
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a communication device may receive a reference signal from a communication station, wherein the reference signal is based on a reference component carrier. The communication device may generate one or more control signals based on one or more keying signals, the one or more keying signals having respective one or more keying frequencies. The communication device may transmit a backscattered signal based on the reference signal and the one or more control signals, wherein the backscattered signal is based on one or more pairs of component carriers that correspond to the reference component carrier shifted by the one or more keying frequencies.