CN106341157A - Simultaneous, cofrequency and full-duplex radio-frequency-domain rapid self-interference suppression system and method thereof - Google Patents
Simultaneous, cofrequency and full-duplex radio-frequency-domain rapid self-interference suppression system and method thereof Download PDFInfo
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- CN106341157A CN106341157A CN201610816299.7A CN201610816299A CN106341157A CN 106341157 A CN106341157 A CN 106341157A CN 201610816299 A CN201610816299 A CN 201610816299A CN 106341157 A CN106341157 A CN 106341157A
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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
Abstract
The invention discloses a simultaneous, cofrequency and full-duplex radio-frequency-domain rapid self-interference suppression system and a method thereof. The system comprises a radio frequency emission channel, an emission antenna, a radio frequency receiving channel, a receiving antenna, a time delay device, an interference reconstruction branch, a dimension reduction operation branch and a subtracter. By using the simultaneous, cofrequency and full-duplex radio-frequency-domain rapid self-interference suppression system and the method thereof, when a phase shift value of a second adjustable phase shift circuit is set to be 0 degree and 90 degree, an output signal of the second adjustable phase shift circuit and a signal received by the receiving antenna are multiplied through the multiplier; and according to a signal output by the multiplier under the two phase shift values, an optimal phase shift value and an attenuation value are calculated, and an adjustable attenuator and a first adjustable phase shift circuit are adjusted. Two-dimensional solutions of optimal values of the adjustable attenuator and the first adjustable phase shift circuit are converted into an one-dimensional solution and subsequent calculating related to a receiving self-interference signal and a self-interference reference signal, and a convergence speed of radio-frequency-domain self-interference suppression is increased.
Description
Technical field
The present invention relates to a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously disturbs suppression system and method.
Background technology
Current wireless communication system carries out two-way communication using the method for time division duplex or FDD.Time division duplex system
System, using same frequency, but different time-gap carrys out transmission data, thus isolating the interference between uplink downlink.FDD system
System, using identical time slot, but different frequency carrys out transmission data, thus isolating the interference between uplink downlink.Both duplexs
Method, during isolation uplink and downlink link, sacrifices time resource and frequency resource respectively, leads to the availability of frequency spectrum low
Under.
Today's society increasingly increases to 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
Launch and receive wireless signal with the full duplex technology of same time, same frequency, certainly this will make radio communication
The spectrum efficiency of link doubles.
However, when the transmitting terminal of Wireless Telecom Equipment and receiving terminal work with frequency, the transmission that transmitting terminal produces can be made simultaneously
Signal enters the receiving channel of receiving terminal, is formed from signal interference, and what this self-interference intensity was much better than that receiving terminal receives is derived from
The intensity of remote wireless communications device signal, thus have a strong impact on the reception to far-end wireless device sending signal for the receiving terminal.Logical
Reason condition, this will reduce the sensitivity of receiving terminal, increases the bit error rate, leads to communication performance to decline.
Therefore, the self-interference carrying out radio frequency domains for the receipt signal of full-duplex transceiver suppresses extremely important, at present, entirely
In duplex transceiver, self-interference suppresses single tap that assembly mainly comprises a time delay device, adjustable attenuator and adjustable phase shifter to penetrate
Frequency domain self-interference suppresses structure, but it is that a non-convex optimization is asked that the two dimension of adjustable attenuator, adjustable phase shifter optimal value solves
The solution of topic, leads to radio frequency domains adaptive interference mitigation convergence rate slow.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, provide a kind of radio frequency domains of co-channel full duplex simultaneously quick
Self-interference suppression system and method, when the second Adjustable Phase Shift circuit is in different phase shift value, by the second Adjustable Phase Shift circuit
Output signal is multiplied by multiplier with the signal that reception antenna receives, further according to the letter of multiplier output under two phase shift values
Number calculate the optimal phase shift value of self-interference suppression and pad value, adjustable attenuator and the first Adjustable Phase Shift circuit are adjusted
Whole, solve simple, thus improve the convergence rate of radio frequency domains self-interference suppression.
The purpose of the present invention is achieved through the following technical solutions: a kind of radio frequency domains of co-channel full duplex simultaneously 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 road, dimensionality reduction computing branch road and subtractor；
The outfan of described radio frequency transmitting channel is connected with transmitting antenna and time delay device respectively, the outfan of time delay device with dry
Disturb reconstruction branch road to connect, the outfan of disturbance reconstruction branch road is connected with the first input end of subtractor；Described reception antenna defeated
Go out end to be connected with the second input of subtractor；The outfan of subtractor is connected with radio frequency reception channel；Described dimensionality reduction computing is propped up
The input on road is connected with time delay device and reception antenna respectively, and the outfan of dimensionality reduction computing branch road is connected with disturbance reconstruction branch road；
Described disturbance reconstruction branch road is used for the self-interference signal of reconstructing system, including adjustable attenuator and the first Adjustable Phase Shift
Circuit；The input of adjustable attenuator is connected with time delay device, the outfan of adjustable attenuator pass through the first Adjustable Phase Shift circuit with
The first input end of subtractor connects；
Described dimensionality reduction computing branch road is used for by adjustable attenuator in disturbance reconstruction branch road and the first Adjustable Phase Shift circuit
The two dimension of the figure of merit solves and is converted into one-dimensional solution, calculates pad value and the phase shift value of optimum, and to adjustable attenuator and first
Adjustable Phase Shift circuit is adjusted；Described dimensionality reduction computing branch road includes the second Adjustable Phase Shift circuit, multiplier and control unit, institute
The input stating the second Adjustable Phase Shift circuit is connected with time delay device, the outfan of the second Adjustable Phase Shift circuit and the first of multiplier
Input connects, and the second input of multiplier is connected with reception antenna, and the outfan of multiplier is connected with control unit, controls
The outfan of unit is connected with the adjustable attenuator of disturbance reconstruction branch road and the first Adjustable Phase Shift circuit respectively.
Further, described transmitting antenna and reception antenna can be double antenna settings；Can also be single antenna simultaneously
Receive and dispatch but need to realize transceiver insulation using circulator.
A kind of radio frequency domains quick self-drying of described co-channel full duplex simultaneously disturbs suppression system, also includes baseband transmission unit
With dac circuit, the outfan of described baseband transmission unit is connected with radio frequency transmitting channel by dac circuit.
A kind of radio frequency domains quick self-drying of described co-channel full duplex simultaneously disturbs suppression system, also includes Baseband-Receive unit
With adc circuit, the outfan of described radio frequency reception channel is connected with Baseband Receiver passage by adc circuit.
Described control unit includes:
Data recordin module, when being in different phase shift value for recording the second Adjustable Phase Shift circuit, the output letter of multiplier
Number；
Computing module, for the output signal according to multiplier, calculates the optimal pad value of AF panel and phase shift value；
Adjusting module, for being adjusted to adjustable attenuator and the first Adjustable Phase Shift circuit, makes adjustable attenuator be in
Optimal pad value, makes the first Adjustable Phase Shift circuit be in optimal phase shift value.
The different phase shift values that described second phase-shift circuit is in are 0 ° or 90 °.
Further, the first described phase-shift circuit includes adjustable phase shifter；
The second described phase-shift circuit can include adjustable phase shifter；
The second described phase-shift circuit can also include: switch selection circuit, and (not phase shift does not move in other words for 0 ° of phase shift
Phase device) tie point, and the second branch road of 90 ° of phase shifts (comprising 90 ° of fixed phase shifters).
A kind of radio frequency domains quick self-drying of described co-channel full duplex simultaneously disturbs the side that suppression system carries out self-interference suppression
Method, comprises the following steps:
S1. processed by the signal that time delay device exports to radio frequency transmitting channel, obtain delay time signal；
S2. delay time signal is inputted the second Adjustable Phase Shift circuit；
S3. in time period 0～t, the phase shift value of the second Adjustable Phase Shift circuit is set to 0 °, and will within this time period
The output signal of the second Adjustable Phase Shift circuit is multiplied by multiplier with the signal that reception antenna receives, and multiplier is exported
Signal transmission preserved to control unit；
S4. in time period t～2t, the phase shift value of the second Adjustable Phase Shift circuit is set to 90 °, and within this time period
The output signal of the second Adjustable Phase Shift circuit is multiplied by multiplier with the signal that reception antenna receives, and multiplier is defeated
The signal transmission going out is preserved to control unit；
S5. control unit calculates the optimal pad value of AF panel and phase shift value；
S6. control unit is adjusted to adjustable attenuator and the first Adjustable Phase Shift circuit according to result of calculation.
Described step s5 includes following sub-step:
S51. control unit calculates the average signal of time period 0～t multiplier output
S52. control unit calculates the average signal of time period t～2t inner multiplication device output
S53. control unit is according to average signalCalculate the optimized attenuation value of AF panelWith interference suppression
The optimal phase shift value of system
In formula, plRepresent the transmission power of full duplex transmitter.
Described step s6 includes following sub-step:
S61. control unit is adjusted to adjustable attenuator so as to be in the optimized attenuation value of AF panel
S62. control unit is adjusted to the first Adjustable Phase Shift circuit so as to be in the optimal phase shift value of AF panel
A signal receiving step is also included: realize subtracting from the signal of reception antenna by subtractor after described step s6
The signal of the first phase-shift circuit output after going to adjust, and it is transferred to radio frequency reception channel by subtracting each other the result obtaining.
The invention has the beneficial effects as follows: when the phase shift value of the second Adjustable Phase Shift circuit is set to 0 ° and 90 °, can by second
The output signal adjusting phase-shift circuit is multiplied by multiplier with the signal that reception antenna receives, and is worth inferior further according to two phase shifts
The signal of change of musical instruments used in a Buddhist or Taoist mass output comes from the optimal phase shift value of AF panel and pad value, to adjustable attenuator and the first Adjustable Phase Shift
Circuit is adjusted；And then achieve to solve the two dimension of adjustable attenuator, the first Adjustable Phase Shift circuit optimal value and be converted into and connect
Receiving the self-interference signal one-dimensional solution related to self-interference reference signal and subsequent calculations, solving simple, thus improve
The convergence rate of radio frequency domains self-interference suppression；Simultaneously because when phase shift value is set to 0 ° and 90 °, to taking advantage of 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.
Brief description
Fig. 1 is the system principle diagram of the present invention；
Fig. 2 is method of the present invention flow chart.
Specific embodiment
Below in conjunction with the accompanying drawings technical scheme is described in further detail, but protection scope of the present invention is not limited to
Described below.
As shown in figure 1, a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously disturbs suppression system, lead to including radio-frequency transmissions
Road, transmitting antenna, radio frequency reception channel, reception antenna, time delay device, disturbance reconstruction branch road, dimensionality reduction computing branch road and subtractor；
The outfan of described radio frequency transmitting channel is connected with transmitting antenna and time delay device respectively, the outfan of time delay device with dry
Disturb reconstruction branch road to connect, the outfan of disturbance reconstruction branch road is connected with the first input end of subtractor；Described reception antenna defeated
Go out end to be connected with the second input of subtractor；The outfan of subtractor is connected with radio frequency reception channel；Described dimensionality reduction computing is propped up
The input on road is connected with time delay device and reception antenna respectively, and the outfan of dimensionality reduction computing branch road is connected with disturbance reconstruction branch road；
Described disturbance reconstruction branch road is used for the self-interference signal of reconstructing system, including adjustable attenuator and the first Adjustable Phase Shift
Circuit；The input of adjustable attenuator is connected with time delay device, the outfan of adjustable attenuator pass through the first Adjustable Phase Shift circuit with
The first input end of subtractor connects；
Described dimensionality reduction computing branch road is used for by adjustable attenuator in disturbance reconstruction branch road and the first Adjustable Phase Shift circuit
The two dimension of the figure of merit solves and is converted into one-dimensional solution, calculates pad value and the phase shift value of optimum, and to adjustable attenuator and first
Adjustable Phase Shift circuit is adjusted；Described dimensionality reduction computing branch road includes the second Adjustable Phase Shift circuit, multiplier and control unit, institute
The input stating the second Adjustable Phase Shift circuit is connected with time delay device, the outfan of the second Adjustable Phase Shift circuit and the first of multiplier
Input connects, and the second input of multiplier is connected with reception antenna, and the outfan of multiplier is connected with control unit, controls
The outfan of unit is connected with the adjustable attenuator of disturbance reconstruction branch road and the first Adjustable Phase Shift circuit respectively.
In an embodiment of the present invention, described transmitting antenna and reception antenna can be double antenna settings；Can also be
Single antenna is received and dispatched simultaneously but is needed to realize transceiver insulation using circulator.
A kind of radio frequency domains quick self-drying of described co-channel full duplex simultaneously disturbs suppression system, also includes baseband transmission unit
With dac circuit, the outfan of described baseband transmission unit is connected with radio frequency transmitting channel by dac circuit.
A kind of radio frequency domains quick self-drying of described co-channel full duplex simultaneously disturbs suppression system, also includes Baseband-Receive unit
With adc circuit, the outfan of described radio frequency reception channel is connected with Baseband Receiver passage by adc circuit.
Described control unit includes:
Data recordin module, when being in different phase shift value for recording the second Adjustable Phase Shift circuit, the output letter of multiplier
Number；
Computing module, for the output signal according to multiplier, calculates the optimal pad value of AF panel and phase shift value；
Adjusting module, for being adjusted to adjustable attenuator and the first Adjustable Phase Shift circuit, makes adjustable attenuator be in
Optimal pad value, makes the first Adjustable Phase Shift circuit be in optimal phase shift value.
The different phase shift values that described second phase-shift circuit is in are 0 ° or 90 °.
The first described phase-shift circuit includes adjustable phase shifter；
In one embodiment of the invention, the second described phase-shift circuit can include adjustable phase shifter；
In another embodiment of the present invention, the second described phase-shift circuit can also include: switch selection circuit, 0 °
The tie point of phase shift (not phase shift does not have the phase shifter in other words), and the second of 90 ° of phase shifts (comprising 90 ° of fixed phase shifters)
Branch road.
As shown in Fig. 2 a kind of radio frequency domains quick self-drying of described co-channel full duplex simultaneously disturbs suppression system carrying out certainly doing
The method disturbing suppression, comprises the following steps:
S1. processed by the signal that time delay device exports to radio frequency transmitting channel, obtain delay time signal；
S2. delay time signal is inputted the second Adjustable Phase Shift circuit；
S3. in time period 0～t, the phase shift value of the second Adjustable Phase Shift circuit is set to 0 °, and will within this time period
The output signal of the second Adjustable Phase Shift circuit is multiplied by multiplier with the signal that reception antenna receives, and multiplier is exported
Signal transmission preserved to control unit；
S4. in time period t～2t, the phase shift value of the second Adjustable Phase Shift circuit is set to 90 °, and within this time period
The output signal of the second Adjustable Phase Shift circuit is multiplied by multiplier with the signal that reception antenna receives, and multiplier is defeated
The signal transmission going out is preserved to control unit；
S5. control unit calculates the optimal pad value of AF panel and phase shift value；
S6. control unit is adjusted to adjustable attenuator and the first Adjustable Phase Shift circuit according to result of calculation.
Described step s5 includes following sub-step:
S51. control unit calculates the average signal of time period 0～t multiplier output
S52. control unit calculates the average signal of time period t～2t inner multiplication device output
S53. control unit is according to average signalCalculate the optimized attenuation value of AF panelWith interference suppression
The optimal phase shift value of system
In formula, plRepresent the transmission power of full duplex transmitter.
In an embodiment of the present invention, described time t can be rational arbitrary value, such as 30s, 1min, 5min etc., by
User is voluntarily arranged as needed.
Described step s6 includes following sub-step:
S61. control unit is adjusted to adjustable attenuator so as to be in the optimized attenuation value of AF panel
S62. control unit is adjusted to the first Adjustable Phase Shift circuit so as to be in the optimal phase shift value of AF panel
A signal receiving step is also included: realize subtracting from the signal of reception antenna by subtractor after described step s6
The signal (i.e. the signal of disturbance reconstruction branch road output) of the first phase-shift circuit output after going to adjust, and pass subtracting each other the result obtaining
It is defeated by radio frequency reception channel.
In traditional self-interference suppression system, need adjustable attenuator, adjustable phase shifter optimal value are carried out two dimension and ask
Solution, but it is the solution of a non-convex optimization problem that the two dimension of adjustable attenuator, adjustable phase shifter optimal value solves, and 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 to 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 output
Signal of change comes from the optimal phase shift value of AF panel and pad value, and adjustable attenuator and the first phase-shift circuit are adjusted；
And then achieve by adjustable attenuator, the first Adjustable Phase Shift circuit optimal value two dimension solve be converted into reception self-interference signal
(reception antenna output) one-dimensional solution related to self-interference reference signal (the second Adjustable Phase Shift circuit output) and subsequent calculations,
Solve simple, thus improve the convergence rate of radio frequency domains self-interference suppression；Simultaneously because phase shift value be set to 0 ° and
When 90 °, in fixed time period, average calculating operation is carried out to the output signal of multiplier, improve the accuracy of operation result.
Claims (9)
1. a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously disturb suppression system it is characterised in that: include radio-frequency transmissions lead to
Road, transmitting antenna, radio frequency reception channel, reception antenna, time delay device, disturbance reconstruction branch road, dimensionality reduction computing branch road and subtractor；
The outfan of described radio frequency transmitting channel is connected with transmitting antenna and time delay device respectively, and the outfan of time delay device is heavy with interference
Build branch road to connect, the outfan of disturbance reconstruction branch road is connected with the first input end of subtractor；The outfan of described reception antenna
It is connected with the second input of subtractor, the outfan of subtractor is connected with radio frequency reception channel；Described dimensionality reduction computing branch road
Input is connected with time delay device and reception antenna respectively, and the outfan of dimensionality reduction computing branch road is connected with disturbance reconstruction branch road；
Described disturbance reconstruction branch road is used for the self-interference signal of reconstructing system, including adjustable attenuator and the first Adjustable Phase Shift electricity
Road；The input of adjustable attenuator is connected with time delay device, and the outfan of adjustable attenuator passes through the first Adjustable Phase Shift circuit and subtracts
The first input end of musical instruments used in a Buddhist or Taoist mass connects；
Described dimensionality reduction computing branch road is used for the optimal value of adjustable attenuator in disturbance reconstruction branch road and the first Adjustable Phase Shift circuit
Two dimension solve and be converted into one-dimensional solution, calculate pad value and the phase shift value of optimum, and adjustable to adjustable attenuator and first
Phase-shift circuit is adjusted；Described dimensionality reduction computing branch road includes the second Adjustable Phase Shift circuit, multiplier and control unit, and described
The input of two Adjustable Phase Shift circuit is connected with time delay device, and the outfan of the second Adjustable Phase Shift circuit inputs with the first of multiplier
End connects, and the second input of multiplier is connected with reception antenna, and the outfan of multiplier is connected with control unit, control unit
Outfan be connected with the adjustable attenuator in disturbance reconstruction branch road and the first Adjustable Phase Shift circuit respectively.
2. a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously according to claim 1 disturbs suppression system, its feature
It is: also include baseband transmission unit and dac circuit, the outfan of described baseband transmission unit is sent out by dac circuit and radio frequency
Penetrate passage to connect.
3. a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously according to claim 1 disturbs suppression system, its feature
It is: also include Baseband-Receive unit and adc circuit, the outfan of described radio frequency reception channel is connect by adc circuit and base band
Receive passage to connect.
4. a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously according to claim 1 disturbs suppression system, its feature
It is: described control unit includes:
Data recordin module, when being in different phase shift value for recording the second Adjustable Phase Shift circuit, the output signal of multiplier；
Computing module, for the output signal according to multiplier, calculates the optimal pad value of AF panel and phase shift value；
Adjusting module, for being adjusted to adjustable attenuator and the first Adjustable Phase Shift circuit, makes adjustable attenuator be in most preferably
Pad value, make the first Adjustable Phase Shift circuit be in optimal phase shift value.
5. a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously according to claim 4 disturbs suppression system, its feature
It is: the different phase shift values that described second phase-shift circuit is in are 0 ° or 90 °.
6. a kind of radio frequency domains quick self-drying of the co-channel full duplex simultaneously according to any one in Claims 1 to 5 disturbs suppression
System processed carry out self-interference suppression method it is characterised in that: comprise the following steps:
S1. processed by the signal that time delay device exports to radio frequency transmitting channel, obtain delay time signal；
S2. delay time signal is inputted the second Adjustable Phase Shift circuit；
S3. in time period 0～t, the phase shift value of the second Adjustable Phase Shift circuit is set to 0 °, and by second within this time period
The output signal of Adjustable Phase Shift circuit is multiplied by multiplier with the signal that reception antenna receives, and the letter that multiplier is exported
Number being transferred to control unit is preserved；
S4. in time period t～2t, the phase shift value of the second Adjustable Phase Shift circuit is set to 90 °, and by within this time period
The output signal of two Adjustable Phase Shift circuit is multiplied by multiplier with the signal that reception antenna receives, and multiplier is exported
Signal transmission is preserved to control unit；
S5. control unit calculates the optimal pad value of AF panel and phase shift value；
S6. control unit is adjusted to adjustable attenuator and the first Adjustable Phase Shift circuit according to result of calculation.
7. a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously according to claim 6 is disturbed suppression system and is carried out certainly doing
Disturb the method for suppression it is characterised in that: described step s5 includes following sub-step:
S51. control unit calculates the average signal of time period 0～t multiplier output
S52. control unit calculates the average signal of time period t～2t inner multiplication device output
S53. control unit is according to average signalCalculate the optimized attenuation value of AF panelWith AF panel
Good phase shift value
In formula, plRepresent the transmission power of full duplex transmitter.
8. a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously according to claim 6 is disturbed suppression system and is carried out certainly doing
Disturb the method for suppression it is characterised in that: described step s6 includes following sub-step:
S61. control unit is adjusted to adjustable attenuator so as to be in the optimized attenuation value of AF panel
S62. control unit is adjusted to the first Adjustable Phase Shift circuit so as to be in the optimal phase shift value of AF panel
9. a kind of radio frequency domains quick self-drying of co-channel full duplex simultaneously according to claim 6 is disturbed suppression system and is carried out certainly doing
Disturb the method for suppression it is characterised in that: also include a signal receiving step after described step s6: realize being derived from by subtractor
The signal of reception antenna deducts the signal of the first phase-shift circuit output after adjustment, and connects subtracting each other the result obtaining and being transferred to radio frequency
Receive passage.
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| 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 |
| CN110061759A (en) * | 2019-04-26 | 2019-07-26 | 电子科技大学 | A kind of electromagnetic spectrum umbrella cover radio frequency domains self-interference suppressing method and system |
| 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 |
| CN112468239A (en) * | 2020-10-29 | 2021-03-09 | 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 |
| CN114024566A (en) * | 2021-11-22 | 2022-02-08 | 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 |
| 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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