Same-frequency full-duplex self-interference offset device
A self-interference cancellation, same-frequency full-duplex technology, applied to the shaping network, electrical components, transmission system, etc. problem, self-interference cancellation effect is remarkable, and the effect of improving wireless spectrum utilization
Active Publication Date: 2015-07-08
SOUTHEAST UNIV
View PDF3 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In order to overcome the deficiencies in the prior art, the present invention provides a same-frequency full-duplex self-interference canceling device to solve the self-interference problem caused by simultaneous transmission and reception of signals at the same frequency during wireless same-frequency full-duplex communication
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] The present invention will be further explained below in conjunction with the drawings.
[0017] Such as figure 1 As shown, the wireless same-frequency full-duplex cancellation device provided by the present invention includes a transmitting channel, a receiving channel, a cancellation module, a power detection module, and a control module. The transmitting channel is used to transmit radio frequency signals into the air, and the transmitted radio frequency signals are coupled to the cancellation module as a local signal; the cancellation module is used to modulate the local signal coupled to the cancellation module by the control module to obtain cancellation Signal and output the cancellation signal to the receiving channel; the receiving channel is used to receive the radio frequency signal from the air, and combine the received radio frequency signal with the cancellation signal output by the cancellation module to achieve self-interference cancellation, and obtain the ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a same-frequency full-duplex self-interference offset device. The same-frequency full-duplex self-interference offset device comprises a transmitting channel, an offset module, a receiving channel, a power detection module and a control module. A radio frequency signal is transmitted to the air by the transmitting channel, and the transmitted signal is coupled to the offset module by the transmitting channel; the offset module is controlled by the control module to adjust the transmitted signal coupled to the offset module by the transmitting channel and acquires an offset signal, wherein the amplitude of the offset signal equals that of a self-interference signal generated by the receiving channel and the phase of the offset signal is opposite to that of the self-interference signal generated by the receiving channel; after the radio frequency signal is received by the receiving channel from the air, the receiving signal and the offset signal output by the offset module are composited to achieve self-interference offset, and the receiving signal after self-interference offset is transmitted to a radio frequency signal receiving end and coupled to the power detection module; the power detection module detects the power intensity of the receiving signal after self-interference offset, and a power detection signal is generated and transmitted to the control module by the power detection module; the control module generates an offset module control signal according to the power detection signal. The same-frequency full-duplex self-interference offset device effectively solves the self-interference problem caused by simultaneous same-frequency signal receiving and transmitting in the wireless same-frequency full-duplex communication process.
Description
Technical field [0001] The invention relates to a wireless same-frequency full-duplex communication technology, in particular to a wireless simultaneous same-frequency full-duplex self-interference cancellation device. Background technique [0002] Wireless communication has developed rapidly in the past ten years. At present, the third-generation mobile communication system has become popular, and the entire wireless communication industry has matured. While meeting people's wireless communication needs, it has created huge economic benefits. However, the third-generation mobile communication system still cannot meet people's increasing demand for mobile service data transmission rates. Generally, methods of increasing the channel bandwidth and improving the utilization rate of spectrum resources can be used to increase the wireless data transmission rate. [0003] Current wireless communication systems generally use frequency division duplexing or time division duplexing to real...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7097H04B1/7107H04L25/03
Inventor 周健义杨彬祺于志强董云扬
Owner SOUTHEAST UNIV