Backscatter Signal Pattern Segmentation for Multi-Device Reading
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Solution Overview
Problem
In backscatter communication systems, simultaneous activation of multiple backscatter devices leads to signal conflicts, resulting in reduced reading efficiency, wasted time, frequency resources, and power consumption, and increased delays.
Innovation Solution
Implementing a communication method where backscatter devices use distinct backscatter signal patterns that do not overlap in the time domain, allowing for orthogonal modulation and demodulation of backscatter reference and data signals, and utilizing different time ranges for modulation to reduce system overheads and improve reading performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple backscatter devices are simultaneously activated, then communication coverage is expanded, but signal conflicts occur causing reduced reading efficiency
Solution Approach 1:
The patent segments the time domain by dividing the excitation signal into multiple time ranges, with each backscatter device assigned to a specific time range. This temporal segmentation allows multiple devices to communicate simultaneously without signal conflicts, as each device reflects signals only during its allocated time slot. The receiver processes signals from different time ranges separately, enabling expanded communication coverage while maintaining reading efficiency.
2Adaptability or versatility
If multiple backscatter devices simultaneously reflect signals, then system capacity is increased, but time and frequency resources are wasted
Solution Approach 1:
The patent applies time domain segmentation by dividing the excitation signal into distinct time ranges, assigning each backscatter device a specific time slot for signal reflection. This prevents simultaneous signal reflection from multiple devices, eliminating resource waste. Each device uses its allocated time range efficiently, and the receiver processes signals accordingly, maximizing system capacity while minimizing energy consumption from redundant transmissions.
3Adaptability or versatility
If multiple backscatter devices simultaneously reflect signals, then network utilization is increased, but delays are caused
Solution Approach 1:
The patent segments the communication process into distinct time ranges, with each backscatter device assigned a specific time slot for signal reflection and data transmission. This temporal ordering eliminates simultaneous signal conflicts and ensures that each device completes its transmission before the next time range begins. The receiver processes signals in the order of their time ranges, reducing communication delays while maintaining high network utilization through efficient time-division multiplexing.
Data Source
AI summary
This application relates to the field of communication technologies, and discloses a communication method and apparatus. On example method includes: a backscatter device receives an excitation signal from an exciter. The backscatter device determines a backscatter signal pattern in a backscatter signal pattern set, where the backscatter signal pattern set includes a plurality of backscatter signal patterns, and backscatter reference signals in the plurality of backscatter signal patterns do not overlap in time domain. The backscatter device modulates a backscatter reference signal and a backscatter data signal on the excitation signal based on the determined backscatter signal pattern, to obtain a backscatter signal. The backscatter device sends the backscatter signal to a receiver.