Ambient Backscatter Communication Using Multi-Threshold Signal Detection
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Solution Overview
Problem
Ambient backscatter communication systems face challenges in effectively transmitting and receiving data using Wi-Fi background RF signals due to signal fluctuations and the need for efficient signal differentiation methods.
Innovation Solution
The method involves generating bitsets by fragmenting data based on a predetermined length, mapping these bitsets to switching patterns, and controlling the reflection of Wi-Fi RF signals using an RF switch, with the number of switching patterns determined by the bitset length, allowing for distinct pattern lengths and multi-threshold point comparisons to decode signals accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ambient backscatter communication uses Wi-Fi background RF signals, then communication capability is improved, but signal fluctuation causes transmission reliability to deteriorate
Solution Approach 1:
The patent changes the parameter of signal detection by using multiple threshold points instead of a single threshold. The receiver compares the received signal intensity against multiple thresholds (first threshold, second threshold, third threshold) to determine bit values, which makes the system more robust against signal fluctuations and improves transmission reliability while maintaining communication capability
Solution Approach 2:
The patent segments the signal detection process into multiple stages with different threshold comparisons. Instead of using a single detection stage, the system divides the detection into multiple segments (comparing against first threshold, then second threshold, then third threshold), allowing more precise differentiation of signal states and reducing errors caused by fluctuation
2Productivity
If data is transmitted using traditional methods, then simplicity is maintained, but link capacity is limited
Solution Approach 1:
The patent segments data into multiple bitsets (first bitset, second bitset, third bitset, etc.) and transmits them using different switching patterns. This segmentation allows more data to be transmitted over the same communication channel, increasing link capacity while the complexity is managed through systematic processing of each bitset segment
Solution Approach 2:
The patent introduces a new dimension to data transmission by using multiple switching patterns (first switching pattern, second switching pattern, third switching pattern) corresponding to different bitset positions. This dimensional expansion allows the system to encode more information in the same physical channel, thereby increasing link capacity beyond traditional single-pattern methods
3Measurement precision
If signal averaging is performed, then noise reduction is achieved, but processing time increases
Solution Approach 1:
The patent performs partial averaging by comparing the received signal against multiple discrete threshold points rather than performing complete continuous averaging. This partial action approach achieves sufficient noise reduction and signal accuracy by sampling at key threshold levels, reducing the processing time required compared to full averaging while maintaining measurement precision
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 the link capacity of ambient backscatter communication by stabilizing signal transmission and reception, reducing errors through averaging and threshold comparisons, and enabling efficient data transmission in IoT applications.
Implementation Method 1
controlling a reflection of a background radio frequency (RF) signal based on a corresponding mapped switching pattern
Data Source
AI summary
Disclosed are a communication method and communication apparatus using an ambient backscatter communication. A transmission apparatus may include generating a plurality of bitsets by fragmenting data based on a predetermined bitset length, mapping the plurality of bitsets to a plurality of switching patterns based on a data size, and controlling a reflection of a background radio frequency (RF) signal based on a corresponding mapped switching pattern, a total number of the plurality of switching patterns may be determined based on the bitset length, and each of the plurality of switching patterns may have a different length.