Embodiments of the present invention provide an interference cancellation apparatus and method. The method includes: receiving a radio frequency receive signal by using a main receive antenna; canceling a first-type self-interference component in the radio frequency receive signal according to a radio frequency reference signal, to generate a first processed signal; acquiring the reconstructed self-interference signal according to a self-interference channel parameter and the radio frequency reference signal; canceling a second-type self-interference component in the first processed signal according to the reconstructed self-interference signal to generate a second processed signal; performing down-conversion processing on the second processed signal to generate a third processed signal; performing analog to digital conversion on the third processed signal to generate a digital signal; and acquiring a digital baseband reference signal, and performing self-interference channel estimation according to the digital baseband reference signal and the digital signal to acquire the self-interference channel parameter.

Interference cancellation apparatus and method

The embodiments of the present invention provide an interference cancellation device and method, relating to the technical field of communications; the invention can prevent ADC/DAC dynamic range limits and effectively cancel a type 2 self-interference component. Comprised are: a radio frequency (RF) reference signal is obtained; an RF reception signal is received by means of a primary receiving antenna; according to the RF reference signal, type 1 self-interference component cancellation is performed on the RF reception signal, and a first processing signal is generated; according to self-interference channel parameters and the RF reference signal, the self-interference reconstruction signal is obtained; according to the self-interference reconstruction signal, a second self-interference signal in the first self-interference signal is canceled, generating a second processing signal; the second processing signal is downconverted, generating a third processing signal; digital/analog conversion is performed on the third processing signal to generate a digital signal; a digital baseband reference signal is obtained, and according to the digital baseband reference signal and the digital signal, self-interference channel estimation is performed to obtain self-interference channel parameters. The present invention is used for interference cancellation.

Interference cancellation device and method

The invention discloses a same-time and same-frequency full-duplex limit self-interference offset method comprising a signal transmitting step and a signal receiving step Self-interference signal offset is completed mainly through signal pre-correction, nonlinear and phase noise extraction, radio-frequency interference reconstruction, and digital interference offset A signal pre-correction module and a regulator module are arranged at the transmitting end, a radio-frequency interference reconstruction unit and a digital interference offset module are arranged, and nonlinear self-interference of transmission and nonlinear self-interference of pre-corrected signals are extracted The same-time and same-frequency full-duplex limit self-interference offset method of the invention is applicable to same-time and same-frequency interference elimination through both the transmitting end and the receiving end in a same-time and same-frequency full-duplex environment The self-interference offset performance is achieved to the limit The spectrum utilization rate is doubled, the communication quality of the system is improved, and the working stability and reliability of communication equipment in a same-time and same-frequency environment are improved

Same-time and same-frequency full-duplex limit self-interference offset method

The invention discloses a system and a method of self interference cancellation in high-efficiency full-duplex communication (e.g. simultaneous sending and receiving in the same frequency). The invention provides an interference cancellation structure which comprises a multi-tap vector modulator interference cancellation circuit used for eliminating time-varying multipath interference in analog RF domains. The multi-tap vector modulator interference cancellation circuit can include multi-stage interference cancellation circuits. For example, the multi-stage interference cancellation circuits include a multi-tap vector modulator interference cancellation circuit and a digital residue interference cancellation circuit. The digital residue interference cancellation circuit is used for eliminating residual interference. The multi-stage interference cancellation circuits are used for eliminating strong multipath signals and residual multipath signals including receiving signal interference related to circulator leakage, antenna reflection and multipath.

System and method of self interference cancellation in high-efficiency full-duplex communication

Systems and methods which provide mitigation of self-interference in spectrally efficient full duplex (e.g., transmit and receive using the same frequency simultaneously) communications are described. Embodiments provide an interference mitigation structure having a multi-tap vector modulator interference cancellation circuit operable to cancel time varying multipath interference in the analog RF domain. A multi-tap vector modulator interference cancellation circuit of embodiments may comprise part of a multi-stage interference cancellation circuit, such as a multi-stage interference cancellation circuit comprising a multi-tap vector modulator interference cancellation circuit and a digital residual interference cancellation circuit. A digital residual interference cancellation circuit of embodiments provides residual interference cancellation. A multi-stage interference cancellation circuit configuration of embodiments is operable to provide cancellation of strong multipath signals as well as cancellation of residual multipath signals, including interference in the received signal associated with circulator leakage, antenna reflection and multipath.

Systems and methods for mitigation of self-interference in spectrally efficient full duplex communications

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.

Same-frequency full-duplex self-interference offset device

Provided is a broadband millimeter wave antenna. The antenna comprises an upper rectangular metal block, a lower rectangular metal block, and an intermediate dielectric substrate, one sides of the upper rectangular metal block and the lower rectangular metal block are respectively provided with a metal arm in an extended manner, the two metal arms are in mirror symmetry with respect to the dielectric substrate, the distances between two opposite surfaces of the metal arms are equal, the distances between two surfaces, which are face to face, of the metal arms are gradually increased along the length direction, a V-shaped radiation opening is formed, the end of the radiation opening forms a horn-shaped mouth portion, one end, with large diameter, of the mouth portion, is arranged towards the outside of the radiation opening, the upper surface and the lower surface of the dielectric substrate are metal surfaces, the dielectric substrate is provided with a switching circuit and a substrate integrated waveguide along the length direction, the switching circuit is arranged from a microstrip line to the substrate integrated waveguide, an output end of the substrate integrated waveguide is provided with a dielectric plate in an extended manner, the width of the dielectric plate is gradually reduced along the length direction, and the dielectric plate stretches into the radiation opening. The antenna is advantaged by wide bandwidth, low cost, small size, simple and compact structure, and easy integration and array organization.

Broadband millimeter wave antenna

The invention discloses a broadband hybrid wave beam forming integrated antenna array The integrated antenna array includes a two-way phase-shifting transmit-receive array, an antenna array body, and a control and calibration unit; the two-way phase-shifting transmit-receive array includes one or more same-phase power dividing modules and a plurality of two-way phase-shifting transmit-receive units, the same-phase power dividing modules are used for dividing one-way radio-frequency signals into multi-way radio-frequency signals in a same-phase uniform-amplitude power dividing mode, and each two-way phase-shifting transmit-receive unit includes a radio-frequency transmit-receive front-end module and a orthogonal-composition phase-shifting module, wherein the radio-frequency transmit-receive front-end module is used for amplifying signals of radio-frequency channels, and the orthogonal-composition phase-shifting module is used for adjusting the phase positions and amplitudes of the radio-frequency channels; the antenna array body is used for radiating or transmitting the signals of the various radio-frequency channels; one end of the control and calibration unit is used for controlling and calibrating the beam forming of the whole broadband hybrid wave beam forming integrated antenna array Through the integrated antenna array, the adjustment accuracy of the signals of the various radio-frequency channels is high, the accurate beam pointing with low minor lobes or without the minor lobes can be formed in a horizontal plane, and the integrated antenna array is more conductive to synchronous communication of multiple users

Broadband hybrid wave beam forming integrated antenna array

In this paper, one kind of design and optimization method for high shape factor substrate integrated waveguide (SIW) filter is presented. This design process gives a fast and accurate solution process for high frequency complex SIW filters. And the implement of a 5-order SIW bandpass filter (BPF) based on cross-coupling technology by using this optimization method has been investigated and experimentally examined in detail. The measured results are in good agreement with simulation result and verify the performance of this design and optimization method.

Zhou Jianyi

Papers

Same-frequency full-duplex self-interference offset device

Broadband millimeter wave antenna

Broadband hybrid wave beam forming integrated antenna array

Design and optimization of high shape factor high-order substrate integrated waveguide filter with cross coupling