Backscatter Signal Transmission Using Frequency-Domain Separation
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Solution Overview
Problem
In backscatter communication systems, the reader is interfered by transmitted signals when attempting to receive backscatter signals, leading to difficulties in full-duplex communication and reduced signal transmission efficiency due to the inability to send and receive signals simultaneously.
Innovation Solution
Implementing a method where the first communication device uses different frequency domain resources for transmitting and receiving signals compared to the second communication device, thereby reducing interference and allowing simultaneous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the reader uses the same frequency domain resource for both transmitting control signals and receiving backscatter signals, then the communication system can operate with fewer frequency resources, but the reader experiences self-interference from its own transmitted signal when attempting to receive backscatter signals
Solution Approach 1:
The frequency domain resources are segmented into at least two separate frequency domain resources: one for transmitting control signals and another for receiving backscatter signals. This segmentation prevents the transmitted signal from interfering with the received signal, allowing the reader to simultaneously transmit and receive without self-interference while maintaining efficient communication.
2Speed
If the reader attempts to send and receive signals simultaneously on the same frequency, then communication speed can be improved, but the transmitted signal interferes with the received backscatter signal
Solution Approach 1:
The system transitions from using a single frequency dimension for both transmission and reception to using multiple frequency dimensions (at least two separate frequency domain resources). This dimensional expansion allows simultaneous transmission and reception of signals without interference, improving both communication speed and reliability by enabling full-duplex operation.
Data Source
AI summary
This application discloses a signal transmission method and apparatus, a communication device, and a storage medium, and relates to the field of communications technologies. A signal transmission method in embodiments of this application includes: A first communication device receives a second signal sent by a second communication device, where a first frequency domain resource used to transmit a signal sent by the first communication device is different from a second frequency domain resource used to transmit the second signal. Another signal transmission method in the embodiments of this application includes: A second communication device receives a first signal sent by a first communication device. The second communication device sends a second signal based on the first signal, where a first frequency domain resource used to transmit the first signal is different from a second frequency domain resource used to transmit the second signal.