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, improvement of wireless spectrum utilization, and remarkable effect of self-interference cancellation
Active Publication Date: 2014-02-12
SOUTHEAST UNIV
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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
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[0016] The present invention will be further described below in conjunction with the accompanying drawings.
[0017] Such as figure 1 As shown, a wireless same-frequency full-duplex cancellation device provided by the present invention includes a transmission channel, a reception 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 signal is coupled to the cancellation module as a local signal; the cancellation module is used to modulate the local signal coupled to the transmission channel to the cancellation module under the control of 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 synthesize the received radio frequency signal and the cancellation signal output by the cancellation modu...
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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 and same-frequency full-duplex self-interference canceling device. Background technique [0002] Wireless communication has developed very rapidly in the past ten years. At present, the third-generation mobile communication system has been popularized, and the entire wireless communication industry has become mature. It has created huge economic benefits while meeting people's wireless communication needs. However, the third-generation mobile communication system still cannot meet people's increasingly high data transmission rate requirements for mobile services. Generally, the wireless data transmission rate can be increased by increasing the channel bandwidth and improving the utilization rate of spectrum resources. [0003] Today's wireless communication systems generally use frequency division duplexing or time division...
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Login to View More IPC IPC(8): H04B1/7097H04B1/7107H04L25/03
Inventor 周健义杨彬祺于志强董云扬
Owner SOUTHEAST UNIV