Physical Signal Configuration for Full-Duplex Self-Interference Reduction
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Solution Overview
Problem
Existing wireless communication systems face challenges in reducing interference, particularly in full-duplex systems, which hinder efficient signal transmission and reception.
Innovation Solution
The method involves configuring physical signals with specific parameters such as cyclic prefix length, transmitting time offset, cyclic suffix length, and subcarrier spacing to minimize interference, including techniques like self-interference channel estimation and repeated transmission of signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex transmission is implemented to improve spectral efficiency and data throughput, then productivity increases, but self-interference between transmit and receive signals worsens
Solution Approach 1:
The patent segments the OFDM signal structure by introducing separate cyclic prefix and cyclic suffix portions. The cyclic prefix contains the transmit signal and the cyclic suffix contains the receive signal, allowing them to be transmitted simultaneously in full-duplex mode while being distinctly separated in the time domain. This segmentation enables the receiver to isolate and process the receive signal component while the transmit signal component is present, thereby maintaining high data throughput while managing self-interference through structured signal separation.
2Reliability
If cyclic prefix length is increased to reduce interference, then reliability improves, but transmission time increases
Solution Approach 1:
The patent employs periodic action by using the cyclic prefix and cyclic suffix structures that repeat the OFDM signal pattern. The cyclic prefix periodically repeats the end portion of the OFDM symbol, and the cyclic suffix periodically repeats the beginning portion. This periodic structure allows the receiver to correlate and identify the transmitted signal pattern, improving reliability for channel estimation and signal detection. The periodic nature enables interference mitigation through correlation processing while maintaining efficient transmission timing through the structured repetition pattern.
Data Source
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AI summary
A transmission method of a physical signal, a terminal, and a base station are provided. The transmission method may include receiving first configuration information, determining a measurement time-frequency resource for a residual self-interference measurement based on the first configuration information, performing the residual self-interference measurement on the measurement time-frequency resource to obtain a measurement result, transmitting feedback information determined according to the measurement result, receiving second configuration information determined according to the feedback information and determining a duplex mode of a terminal based on the second configuration information. According to the present disclosure, interference during a signal transmission procedure may be reduced.