CN106341157B - A kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system and method - Google Patents
A kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system and method Download PDFInfo
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- CN106341157B CN106341157B CN201610816299.7A CN201610816299A CN106341157B CN 106341157 B CN106341157 B CN 106341157B CN 201610816299 A CN201610816299 A CN 201610816299A CN 106341157 B CN106341157 B CN 106341157B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1461—Suppression of signals in the return path, i.e. bidirectional control circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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Abstract
The invention discloses a kind of while co-channel full duplex radio frequency domains quick self-dryings to disturb suppression system and method, and the system includes radio frequency transmitting channel, transmitting antenna, radio frequency reception channel, reception antenna, time delay device, disturbance reconstruction branch, dimensionality reduction operation branch and subtracter.The present invention provides a kind of while co-channel full duplex radio frequency domains quick self-dryings to disturb suppression system and method, when the phase shift value of the second Adjustable Phase Shift circuit is set as 0 ° and 90 °, the output signal of second Adjustable Phase Shift circuit is multiplied with the signal that reception antenna receives by multiplier, the signal exported further according to multiplier under two phase shift values calculates best phase shift value and pad value, adjustable attenuator and the first Adjustable Phase Shift circuit are adjusted, it realizes adjustable attenuator, the two dimension solution of first Adjustable Phase Shift circuit optimal value, which is converted into, receives self-interference signal and the relevant one-dimensional solution of self-interference reference signal and follow-up calculating, improve the convergence rate of radio frequency domains self-interference inhibition.
Description
Technical field
The present invention relates to a kind of while co-channel full duplex radio frequency domains quick self-dryings to disturb suppression system and method.
Background technology
Current wireless communication system carries out two-way communication using the method for time division duplex or frequency division duplex.Time division duplex system
System, using identical frequency, but different time-gap carrys out transmission data, to which the interference between uplink downlink be isolated.Frequency division duplex system
System, using identical time slot, but different frequency carrys out transmission data, to which the interference between uplink downlink be isolated.Both duplexs
Method sacrifices time resource and frequency resource, causes the availability of frequency spectrum low respectively during uplink and downlink link is isolated
Under.
Today's society increasingly increases wireless data service demand, and the spatial wireless channels degree of crowding is but more prominent, this
People are forced constantly to seek new method to improve frequency spectrum resource utilization rate and equipment interference free performance.If wireless telecom equipment makes
Emit and receive wireless signal with same time, the full duplex technology of identical frequency, unquestionably this will be so that wireless communication
The spectrum efficiency of link doubles.
However, when the transmitting terminal and receiving terminal of wireless telecom equipment work with frequency simultaneously, the transmission of transmitting terminal generation can be made
Signal enters the receiving channel of receiving terminal, is formed from signal interference, and what which was much better than that receiving terminal receives comes from
The intensity of remote wireless communications device signal sends the reception of signal to seriously affect receiving terminal to far-end wireless device.It is logical
Reason condition, this will reduce the sensitivity of receiving terminal, increase the bit error rate, communication performance is caused to decline.
Therefore, extremely important is inhibited for the self-interference for receiving signal progress radio frequency domains of full-duplex transceiver, currently, entirely
Self-interference inhibition component includes mainly that single tap of a time delay device, adjustable attenuator and adjustable phase shifter is penetrated in duplex transceiver
Frequency domain self-interference inhibits structure, but it is that a non-convex optimization is asked that the two dimension of adjustable attenuator, adjustable phase shifter optimal value, which solves,
The solution of topic causes radio frequency domains adaptive interference mitigation convergence rate slow.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of while co-channel full duplex radio frequency domains are quick
Self-interference suppression system and method, when the second Adjustable Phase Shift circuit is in different phase shift values, by the second Adjustable Phase Shift circuit
Output signal is multiplied with the signal that reception antenna receives by multiplier, the letter exported further according to multiplier under two phase shift values
Number phase shift value and pad value that self-interference inhibits best are calculated, adjustable attenuator and the first Adjustable Phase Shift circuit are adjusted
Whole, solution is simple and practicable, to improve the convergence rate of radio frequency domains self-interference inhibition.
The purpose of the present invention is achieved through the following technical solutions：A kind of while co-channel full duplex radio frequency domains are quick
Self-interference suppression system, including radio frequency transmitting channel, transmitting antenna, radio frequency reception channel, reception antenna, time delay device, interference weight
Build branch, dimensionality reduction operation branch and subtracter；
The output end of the radio frequency transmitting channel is connect with transmitting antenna and time delay device respectively, the output end of time delay device with it is dry
It disturbs and rebuilds branch connection, the output end of disturbance reconstruction branch and the first input end of subtracter connect；The reception antenna it is defeated
Second input terminal of outlet and subtracter connects；The output end of subtracter is connect with radio frequency reception channel；The dimensionality reduction operation branch
The input terminal on road is connect with time delay device and reception antenna respectively, and the output end of dimensionality reduction operation branch is connect with disturbance reconstruction branch；
The disturbance reconstruction branch is used for the self-interference signal of reconstructing system, including adjustable attenuator and the first Adjustable Phase Shift
Circuit；The input terminal of adjustable attenuator is connect with time delay device, the output end of adjustable attenuator by the first Adjustable Phase Shift circuit with
The first input end of subtracter connects；
The dimensionality reduction operation branch is used for adjustable attenuator in disturbance reconstruction branch and the first Adjustable Phase Shift circuit most
The two dimension of the figure of merit, which solves, is converted into one-dimensional solution, calculates optimal pad value and phase shift value, and to adjustable attenuator and first
Adjustable Phase Shift circuit is adjusted；The dimensionality reduction operation branch includes the second Adjustable Phase Shift circuit, multiplier and control unit, institute
The input terminal for stating the second Adjustable Phase Shift circuit is connect with time delay device, the output end of the second Adjustable Phase Shift circuit and the first of multiplier
Input terminal connects, and the second input terminal of multiplier is connect with reception antenna, and the output end of multiplier is connect with control unit, control
The output end of unit is connect with the adjustable attenuator of disturbance reconstruction branch and the first Adjustable Phase Shift circuit respectively.
Further, the transmitting antenna and reception antenna can be double antenna settings；Can also be single antenna simultaneously
It receives and dispatches but needs to realize transceiver insulation using circulator.
A kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, further includes baseband transmission unit
And DAC circuit, the output end of the baseband transmission unit are connect by DAC circuit with radio frequency transmitting channel.
A kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, further includes Baseband-Receive unit
And adc circuit, the output end of the radio frequency reception channel are connect by adc circuit with Baseband Receiver channel.
The control unit includes：
Data recordin module, when being in different phase shift values for recording the second Adjustable Phase Shift circuit, the output letter of multiplier
Number；
Computing module calculates AF panel best pad value and phase shift value for the output signal according to multiplier；
Adjustment module makes adjustable attenuator be in for being adjusted to adjustable attenuator and the first Adjustable Phase Shift circuit
Best pad value makes the first Adjustable Phase Shift circuit be in best phase shift value.
The different phase shift values that the second Adjustable Phase Shift circuit is in are 0 ° or 90 °.
Further, first phase-shift circuit includes adjustable phase shifter；
The second Adjustable Phase Shift circuit may include adjustable phase shifter；
The second Adjustable Phase Shift circuit can also include：Switch selection circuit, (not phase shift does not have in other words for 0 ° of phase shift
Have phase shifter) the first branch and 90 ° of phase shifts (including 90 ° of fixed phase shifters) the second branch.
A kind of while co-channel full duplex radio frequency domains quick self-drying disturbs the side that suppression system carries out self-interference inhibition
Method includes the following steps：
S1. the signal exported to radio frequency transmitting channel by time delay device is handled, and obtains delay time signal；
S2. delay time signal is inputted into the second Adjustable Phase Shift circuit；
S3. the phase shift value of the second Adjustable Phase Shift circuit is set as 0 ° in 0~T of period, and will within the period
The output signal of second Adjustable Phase Shift circuit is multiplied with the signal that reception antenna receives by multiplier, and multiplier is exported
Signal transmission preserved to control unit；
S4. the phase shift value of the second Adjustable Phase Shift circuit is set as 90 ° in period T~2T, and within the period
The output signal of second Adjustable Phase Shift circuit is multiplied with the signal that reception antenna receives by multiplier, and multiplier is defeated
The signal transmission gone out is preserved to control unit；
S5. control unit calculates the best pad value and phase shift value of AF panel；
S6. control unit is adjusted adjustable attenuator and the first Adjustable Phase Shift circuit according to result of calculation.
The step S5 includes following sub-step：
S51. control unit calculates the average signal of 0~T of period multiplier output
S52. control unit calculates the average signal of period T~2T inner multiplication device output
S53. control unit is according to average signalCalculate the optimized attenuation value of AF panelPress down with interference
The best phase shift value of system
In formula, pl represents the transmission power of full duplex transmitter.
The step S6 includes following sub-step：
S61. control unit is adjusted adjustable attenuator, is at the optimized attenuation value of AF panel
S62. the first Adjustable Phase Shift of control unit pair circuit is adjusted, and is at the best phase shift value of AF panel
It further include a signal receiving step after the step S6：Realize that the signal from reception antenna subtracts by subtracter
The signal that the first phase-shift circuit exports after adjusting is removed, and the result subtracted each other is transferred to radio frequency reception channel.
The beneficial effects of the invention are as follows：It, can by second when the phase shift value of the second Adjustable Phase Shift circuit is set as 0 ° and 90 °
The output signal of phase-shift circuit is adjusted to be multiplied by multiplier with the signal that reception antenna receives, it is inferior further according to two phase shift values
The signal of musical instruments used in a Buddhist or Taoist mass output calculates phase shift value and pad value that self-interference inhibits best, to adjustable attenuator and the first Adjustable Phase Shift
Circuit is adjusted；And then it realizes to solve to be converted by the two dimension of adjustable attenuator, the first Adjustable Phase Shift circuit optimal value and connect
Receipts self-interference signal and the relevant one-dimensional solution of self-interference reference signal and follow-up calculating, solution is simple and practicable, to improve
The convergence rate that radio frequency domains self-interference inhibits；Simultaneously because when phase shift value is set as 0 ° and 90 °, to multiplying in fixed time period
The output signal of musical instruments used in a Buddhist or Taoist mass carries out average calculating operation, improves the accuracy of operation result.
Description of the drawings
Fig. 1 is the system principle diagram of the present invention；
Fig. 2 is flow chart of the method for the present invention.
Specific implementation mode
Technical scheme of the present invention is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
It is as described below.
As shown in Figure 1, a kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, including radio-frequency transmissions are led to
Road, transmitting antenna, radio frequency reception channel, reception antenna, time delay device, disturbance reconstruction branch, dimensionality reduction operation branch and subtracter；
The output end of the radio frequency transmitting channel is connect with transmitting antenna and time delay device respectively, the output end of time delay device with it is dry
It disturbs and rebuilds branch connection, the output end of disturbance reconstruction branch and the first input end of subtracter connect；The reception antenna it is defeated
Second input terminal of outlet and subtracter connects；The output end of subtracter is connect with radio frequency reception channel；The dimensionality reduction operation branch
The input terminal on road is connect with time delay device and reception antenna respectively, and the output end of dimensionality reduction operation branch is connect with disturbance reconstruction branch；
The disturbance reconstruction branch is used for the self-interference signal of reconstructing system, including adjustable attenuator and the first Adjustable Phase Shift
Circuit；The input terminal of adjustable attenuator is connect with time delay device, the output end of adjustable attenuator by the first Adjustable Phase Shift circuit with
The first input end of subtracter connects；
The dimensionality reduction operation branch is used for adjustable attenuator in disturbance reconstruction branch and the first Adjustable Phase Shift circuit most
The two dimension of the figure of merit, which solves, is converted into one-dimensional solution, calculates optimal pad value and phase shift value, and to adjustable attenuator and first
Adjustable Phase Shift circuit is adjusted；The dimensionality reduction operation branch includes the second Adjustable Phase Shift circuit, multiplier and control unit, institute
The input terminal for stating the second Adjustable Phase Shift circuit is connect with time delay device, the output end of the second Adjustable Phase Shift circuit and the first of multiplier
Input terminal connects, and the second input terminal of multiplier is connect with reception antenna, and the output end of multiplier is connect with control unit, control
The output end of unit is connect with the adjustable attenuator of disturbance reconstruction branch and the first Adjustable Phase Shift circuit respectively.
In an embodiment of the present invention, the transmitting antenna and reception antenna can be double antenna settings；Can also be
Single antenna is received and dispatched but needs to realize transceiver insulation using circulator simultaneously.
A kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, further includes baseband transmission unit
And DAC circuit, the output end of the baseband transmission unit are connect by DAC circuit with radio frequency transmitting channel.
A kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, further includes Baseband-Receive unit
And adc circuit, the output end of the radio frequency reception channel are connect by adc circuit with Baseband Receiver channel.
The control unit includes：
Data recordin module, when being in different phase shift values for recording the second Adjustable Phase Shift circuit, the output letter of multiplier
Number；
Computing module calculates AF panel best pad value and phase shift value for the output signal according to multiplier；
Adjustment module makes adjustable attenuator be in for being adjusted to adjustable attenuator and the first Adjustable Phase Shift circuit
Best pad value makes the first Adjustable Phase Shift circuit be in best phase shift value.
The different phase shift values that the second Adjustable Phase Shift circuit is in are 0 ° or 90 °.
First phase-shift circuit includes adjustable phase shifter；
In one embodiment of the invention, the second Adjustable Phase Shift circuit may include adjustable phase shifter；
In another embodiment of the present invention, the second Adjustable Phase Shift circuit can also include：Switch selection electricity
Road, the first branch of 0 ° of phase shift (not phase shift, in other words without phase shifter) and 90 ° of phase shifts (including 90 ° of fixed phase shifters)
The second branch.
It is carried out from dry as shown in Fig. 2, a kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system
The method for disturbing inhibition, includes the following steps：
S1. the signal exported to radio frequency transmitting channel by time delay device is handled, and obtains delay time signal；
S2. delay time signal is inputted into the second Adjustable Phase Shift circuit；
S3. the phase shift value of the second Adjustable Phase Shift circuit is set as 0 ° in 0~T of period, and will within the period
The output signal of second Adjustable Phase Shift circuit is multiplied with the signal that reception antenna receives by multiplier, and multiplier is exported
Signal transmission preserved to control unit；
S4. the phase shift value of the second Adjustable Phase Shift circuit is set as 90 ° in period T~2T, and within the period
The output signal of second Adjustable Phase Shift circuit is multiplied with the signal that reception antenna receives by multiplier, and multiplier is defeated
The signal transmission gone out is preserved to control unit；
S5. control unit calculates the best pad value and phase shift value of AF panel；
S6. control unit is adjusted adjustable attenuator and the first Adjustable Phase Shift circuit according to result of calculation.
The step S5 includes following sub-step：
S51. control unit calculates the average signal of 0~T of period multiplier output
S52. control unit calculates the average signal of period T~2T inner multiplication device output
S53. control unit is according to average signalCalculate the optimized attenuation value of AF panelPress down with interference
The best phase shift value of system
In formula, pl represents the transmission power of full duplex transmitter.
In an embodiment of the present invention, the time T can be reasonable arbitrary value, such as 30s, 1min, 5min etc., by
User is voluntarily arranged as needed.
The step S6 includes following sub-step：
S61. control unit is adjusted adjustable attenuator, is at the optimized attenuation value of AF panel
S62. the first Adjustable Phase Shift of control unit pair circuit is adjusted, and is at the best phase shift value of AF panel
It further include a signal receiving step after the step S6：Realize that the signal from reception antenna subtracts by subtracter
The signal (i.e. the signal of disturbance reconstruction branch output) that the first phase-shift circuit exports after adjusting is removed, and the result subtracted each other is passed
It is defeated by radio frequency reception channel.
In traditional self-interference suppression system, need to ask adjustable attenuator, adjustable phase shifter optimal value progress two dimension
Solution, but the two dimension solution of adjustable attenuator, adjustable phase shifter optimal value is the solution of a non-convex optimization problem, leads to radio frequency
Domain adaptive interference mitigation convergence rate is slow.
In the present invention, when the phase shift value of the second Adjustable Phase Shift circuit is set as 0 ° and 90 °, by the second Adjustable Phase Shift circuit
Output signal be multiplied by multiplier with the signal that reception antenna receives, further according under two phase shift values multiplier export
Signal calculates the phase shift value and pad value that self-interference inhibits best, is adjusted to adjustable attenuator and the first phase-shift circuit；
And then it realizes to solve the two dimension of adjustable attenuator, the first Adjustable Phase Shift circuit optimal value and is converted into reception self-interference signal
(reception antenna output) and the relevant one-dimensional solution of self-interference reference signal (the second Adjustable Phase Shift circuit output) and follow-up calculating,
Solve it is simple and practicable, to improve radio frequency domains self-interference inhibition convergence rate；Simultaneously because phase shift value be set as 0 ° and
At 90 °, average calculating operation is carried out to the output signal of multiplier in fixed time period, improves the accuracy of operation result.
Claims (9)
1. a kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, it is characterised in that：It is logical including radio-frequency transmissions
Road, transmitting antenna, radio frequency reception channel, reception antenna, time delay device, disturbance reconstruction branch, dimensionality reduction operation branch and subtracter；
The output end of the radio frequency transmitting channel is connect with transmitting antenna and time delay device respectively, output end and the interference weight of time delay device
Branch connection is built, the output end of disturbance reconstruction branch and the first input end of subtracter connect；The output end of the reception antenna
It is connect with the second input terminal of subtracter, the output end of subtracter is connect with radio frequency reception channel；The dimensionality reduction operation branch
Input terminal is connect with time delay device and reception antenna respectively, and the output end of dimensionality reduction operation branch is connect with disturbance reconstruction branch；
The disturbance reconstruction branch is used for the self-interference signal of reconstructing system, including adjustable attenuator and the first Adjustable Phase Shift electricity
Road；The input terminal of adjustable attenuator is connect with time delay device, the output end of adjustable attenuator by the first Adjustable Phase Shift circuit with subtract
The first input end of musical instruments used in a Buddhist or Taoist mass connects；
The dimensionality reduction operation branch is used for the optimal value of adjustable attenuator in disturbance reconstruction branch and the first Adjustable Phase Shift circuit
Two dimension solve be converted into one-dimensional solution, calculate optimal pad value and phase shift value, and adjustable to adjustable attenuator and first
Phase-shift circuit is adjusted；The dimensionality reduction operation branch includes the second Adjustable Phase Shift circuit, multiplier and control unit, and described the
The input terminal of two Adjustable Phase Shift circuits is connect with time delay device, the first input of the output end and multiplier of the second Adjustable Phase Shift circuit
End connection, the second input terminal of multiplier are connect with reception antenna, and the output end of multiplier is connect with control unit, control unit
Output end respectively in disturbance reconstruction branch adjustable attenuator and the first Adjustable Phase Shift circuit connect.
2. according to claim 1 a kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, feature
It is：Further include baseband transmission unit and DAC circuit, the output end of the baseband transmission unit is sent out by DAC circuit and radio frequency
Penetrate channel connection.
3. according to claim 1 a kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, feature
It is：Further include Baseband-Receive unit and adc circuit, the output end of the radio frequency reception channel is connect by adc circuit and base band
Receive channel connection.
4. according to claim 1 a kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, feature
It is：The control unit includes：
Data recordin module, when being in different phase shift values for recording the second Adjustable Phase Shift circuit, the output signal of multiplier；
Computing module calculates AF panel best pad value and phase shift value for the output signal according to multiplier；
Module is adjusted, for being adjusted to adjustable attenuator and the first Adjustable Phase Shift circuit, adjustable attenuator is made to be in best
Pad value, so that the first Adjustable Phase Shift circuit is in best phase shift value.
5. according to claim 4 a kind of while co-channel full duplex radio frequency domains quick self-drying disturbs suppression system, feature
It is：The different phase shift values that the second Adjustable Phase Shift circuit is in are 0 ° or 90 °.
6. a kind of while co-channel full duplex radio frequency domains quick self-drying according to any one of Claims 1 to 5 disturbs suppression
The method that system processed carries out self-interference inhibition, it is characterised in that：Include the following steps：
S1. the signal exported to radio frequency transmitting channel by time delay device is handled, and obtains delay time signal；
S2. delay time signal is inputted into the second Adjustable Phase Shift circuit；
S3. the phase shift value of the second Adjustable Phase Shift circuit is set as 0 ° in 0~T of period, and by second within the period
The output signal of Adjustable Phase Shift circuit is multiplied with the signal that reception antenna receives by multiplier, and the letter that multiplier is exported
Number being transferred to control unit is preserved；
S4. the phase shift value of the second Adjustable Phase Shift circuit is set as 90 ° in period T~2T, and by within the period
The output signal of two Adjustable Phase Shift circuits is multiplied with the signal that reception antenna receives by multiplier, and multiplier is exported
Signal transmission is preserved to control unit；
S5. control unit calculates the best pad value and phase shift value of AF panel；
S6. control unit is adjusted adjustable attenuator and the first Adjustable Phase Shift circuit according to result of calculation.
7. according to claim 6 a kind of while co-channel full duplex radio frequency domains quick self-drying is disturbed suppression system and is carried out from dry
The method for disturbing inhibition, it is characterised in that：The step S5 includes following sub-step：
S51. control unit calculates the average signal of 0~T of period multiplier output
S52. control unit calculates the average signal of period T~2T inner multiplication device output
S53. control unit is according to average signalCalculate the optimized attenuation value of AF panelWith AF panel
Best phase shift value
In formula, pl represents the transmission power of full duplex transmitter.
8. according to claim 6 a kind of while co-channel full duplex radio frequency domains quick self-drying is disturbed suppression system and is carried out from dry
The method for disturbing inhibition, it is characterised in that：The step S6 includes following sub-step：
S61. control unit is adjusted adjustable attenuator, is at the optimized attenuation value of AF panel
S62. the first Adjustable Phase Shift of control unit pair circuit is adjusted, and is at the best phase shift value of AF panel
9. according to claim 6 a kind of while co-channel full duplex radio frequency domains quick self-drying is disturbed suppression system and is carried out from dry
The method for disturbing inhibition, it is characterised in that：It further include a signal receiving step after the step S6：It is come from by subtracter realization
The signal of reception antenna subtracts the signal of the first phase-shift circuit output after adjustment, and the result subtracted each other is transferred to radio frequency and is connect
Receive channel.
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| CN107231168B (en) * | 2017-08-11 | 2019-10-01 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | A kind of cancellation element and removing method of self-interference signal |
| CN108631754B (en) * | 2018-04-27 | 2022-03-22 | 成都仕芯半导体有限公司 | High-precision phase shifting device |
| CN109412630B (en) * | 2018-11-16 | 2020-07-14 | Oppo（重庆）智能科技有限公司 | Self-interference elimination method, terminal and computer storage medium |
| CN110061759B (en) * | 2019-04-26 | 2020-08-04 | 电子科技大学 | Electromagnetic spectrum umbrella cover radio frequency domain self-interference suppression method and system |
| CN112468239B (en) * | 2020-10-29 | 2022-05-24 | 西安空间无线电技术研究所 | Multi-dimensional photoelectric combined simultaneous same-frequency full-duplex self-interference suppression system and method |
| CN114024566B (en) * | 2021-11-22 | 2023-02-28 | 中国人民解放军国防科技大学 | Multi-channel interference suppression circuit based on loop phase shift weighting structure |
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| CN103067094A (en) * | 2013-01-04 | 2013-04-24 | 南京信息工程大学 | Self-adaption interference cancellation method and device for improving cancellation bandwidth |
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| US20150065064A1 (en) * | 2013-08-30 | 2015-03-05 | Qualcomm Incorporated | Active interference cancellation in analog domain |
| CN105337720B (en) * | 2015-09-29 | 2018-08-03 | 电子科技大学 | A kind of simulation self-interference suppression circuit and self-interference suppressing method |
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| CN103067094A (en) * | 2013-01-04 | 2013-04-24 | 南京信息工程大学 | Self-adaption interference cancellation method and device for improving cancellation bandwidth |
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