CN110445510B - Method for suppressing same frequency interference by quadrature phase shift keying - Google Patents
Method for suppressing same frequency interference by quadrature phase shift keying Download PDFInfo
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- CN110445510B CN110445510B CN201910668599.9A CN201910668599A CN110445510B CN 110445510 B CN110445510 B CN 110445510B CN 201910668599 A CN201910668599 A CN 201910668599A CN 110445510 B CN110445510 B CN 110445510B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000010363 phase shift Effects 0.000 title claims abstract description 13
- 238000001228 spectrum Methods 0.000 claims abstract description 8
- 230000003111 delayed effect Effects 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
- H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
- H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
- G01S7/358—Receivers using I/Q processing
Abstract
The invention relates to the technical field of communication, in particular to a method for suppressing co-channel interference by quadrature phase shift keying, which comprises the following steps of S1, transmitting a first radio frequency signal by a transmitting unit of a radar transceiving system; step S2, receiving a second rf signal formed by reflecting the first rf signal at a receiving unit of the radar transceiver system; step S3, a calculating unit is used to divide the data in the second rf signal by the data in the first rf signal, so as to uniformly distribute the co-channel interference on the frequency spectrum. The technical scheme of the invention has the beneficial effects that: the method for suppressing the co-channel interference by the quadrature phase shift keying is characterized in that the co-channel interference is uniformly distributed on a frequency spectrum by dividing data in a second radio frequency signal of a receiving unit by data in a first radio frequency signal of a transmitting unit through a calculating unit, so that the co-channel interference is suppressed by the data received in a radar receiving and transmitting system, and the quality of the received data is improved.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method for suppressing same frequency interference by quadrature phase shift keying.
Background
In a radar transmission and reception system, if signals generate the same frequency, received data may be interfered, so that the quality of the received data is poor, and it is difficult to identify a target through a conventional signal processing manner after the data is received.
Therefore, the above problems are difficult problems to be solved by those skilled in the art.
Disclosure of Invention
In view of the above problems in the prior art, a method for suppressing co-channel interference by quadrature phase shift keying is provided.
The specific technical scheme is as follows:
the invention provides a method for inhibiting same frequency interference by quadrature phase shift keying, which is applied to a radar transceiving system, wherein the method comprises the following steps:
step S1, a transmitting unit of the radar transceiver system transmits a first radio frequency signal;
step S2, receiving a second rf signal formed by reflecting the first rf signal at a receiving unit of the radar transceiver system;
step S3, a calculating unit is adopted to divide the data in the second rf signal by the data in the first rf signal, so as to uniformly distribute the co-channel interference on the frequency spectrum.
Preferably, in the step S1, the first rf signal includes a first mode, a second mode, a third mode and a fourth mode.
Preferably, the first mode corresponds to a value of 1+ I, the I1 channel of the first mode is 0, and the Q1 channel of the first mode is 0.
Preferably, the second mode corresponds to a value of-1 + I, the I2 channel of the second mode is 1, and the Q2 channel of the second mode is 0.
Preferably, the third mode corresponds to a value of-1-I, the I3 channel of the third mode is 1, and the Q3 channel of the third mode is 1.
Preferably, the fourth mode corresponds to a value of 1-I, the I4 channel of the fourth mode is 0, and the Q4 channel of the fourth mode is 1.
Preferably, the transmitting unit includes:
a first transmitting module for transmitting a first transmitting signal;
a second transmitting module for transmitting a second transmitting signal;
the delay module is connected with the second transmitting module and used for delaying the second transmitting signal so as to process the second transmitting signal to obtain a delayed signal;
and the power synthesizer is respectively connected with the first transmitting module and the delay module and combines the first transmitting signal and the delay signal to modulate a quadrature phase signal.
Preferably, the delay module is a 90-degree delay module.
The technical scheme of the invention has the beneficial effects that: the method for suppressing the co-channel interference by the quadrature phase shift keying is characterized in that the co-channel interference is uniformly distributed on a frequency spectrum by dividing data in a second radio frequency signal of a receiving unit by data in a first radio frequency signal of a transmitting unit through a calculating unit, so that the co-channel interference is suppressed by the data received in a radar receiving and transmitting system, and the quality of the received data is improved.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.
FIG. 1 is a flow chart of the steps of an embodiment of the present invention;
FIG. 2 is a phase diagram of a first RF signal according to an embodiment of the present invention;
fig. 3 is a block diagram of a transmitting unit in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The invention provides a method for restraining same frequency interference by quadrature phase shift keying, which comprises the following steps:
step S1, a transmitting unit of the radar transceiver system transmits a first rf signal;
step S2, receiving a second rf signal formed by the reflection of the first rf signal at a receiving unit of the radar transceiver system;
step S3, a calculating unit is used to divide the data in the second rf signal by the data in the first rf signal, so as to uniformly distribute the co-channel interference on the frequency spectrum.
According to the method for suppressing co-channel interference through quadrature phase shift keying, as shown in fig. 1, a first radio frequency signal is transmitted through a transmitting unit of a radar transmitting and receiving system, and data in the first radio frequency signal is acquired.
Furthermore, a receiving unit in the radar transceiving system receives a second radio frequency signal formed after the first radio frequency signal is reflected, and acquires data in a second radio frequency line number.
Furthermore, the data in the second radio frequency signal is divided by the data in the first radio frequency signal through the calculating unit, so that the co-frequency interference is uniformly distributed on the frequency spectrum, the co-frequency interference of the data received in the radar transceiving system is suppressed, and the quality of the received data is improved.
In a preferred embodiment, in step S1, the first rf signal includes a first mode, a second mode, a third mode and a fourth mode.
The first mode corresponds to a value of 1+ I, the I1 channel of the first mode is 0, and the Q1 channel of the first mode is 0.
The second mode corresponds to a value of-1 + I, the I2 channel of the second mode is 1, and the Q2 channel of the second mode is 0.
The third mode corresponds to a value of-1-I, the I3 channel of the third mode is 1, and the Q3 channel of the third mode is 1.
The fourth mode corresponds to values of 1-I, the I4 channel of the fourth mode is 0, and the Q4 channel of the fourth mode is 1.
Specifically, as shown in fig. 2, a first pattern, a second pattern, a third pattern and a fourth pattern are randomly generated in the transmitting unit, wherein the first pattern is 0, the corresponding value is 1+ I, the first pattern is divided into an I1 channel and a Q1 channel, the I1 channel is 0, and the Q1 channel is 0.
Further, the second pattern is 1, which corresponds to a value of-1 + I, and the second pattern is divided into an I2 channel and a Q2 channel, the I2 channel is 1, and the Q2 channel is 0.
Further, the third pattern is 2, which corresponds to a value of-1-I, and the third pattern is divided into an I3 channel and a Q3 channel, the I3 channel is 1, and the Q3 channel is 1.
Further, the fourth pattern is 3, which corresponds to a value of 1-I, and the fourth pattern is divided into an I4 channel and a Q4 channel, wherein the I4 channel is 0 and the Q4 channel is 1.
In a preferred embodiment, the transmitting unit 1 comprises:
a first transmitting module 10 for transmitting a first transmitting signal;
a second transmitting module 11 for transmitting a second transmitting signal;
the delay module 12 is connected to the second transmitting module 11, and the delay module 12 is configured to delay the second transmitting signal to obtain a delayed signal;
and the power combiner 13 is respectively connected with the first transmitting module 10 and the delay module 12, and combines the first transmitting signal and the delay signal to modulate a quadrature phase signal.
Specifically, as shown in fig. 3, a first transmission signal is transmitted by the first transmission module 10 in the transmission unit 1.
Further, the second transmitting signal transmitted by the second transmitting module 11 is delayed by the delay module 12 to obtain a delayed signal.
Further, the first transmission signal and the delayed second transmission signal are combined by the power combiner 13 to be modulated into a quadrature phase signal, so as to realize the spreading of the quadrature phase shift keying and realize the effect of I/Q modulation.
In a preferred embodiment, the delay module 12 is a 90 degree delay module.
The technical scheme of the invention has the beneficial effects that: the method for suppressing the co-channel interference by the quadrature phase shift keying is characterized in that the co-channel interference is uniformly distributed on a frequency spectrum by dividing data in a second radio frequency signal of a receiving unit by data in a first radio frequency signal of a transmitting unit through a calculating unit, so that the co-channel interference is suppressed by the data received in a radar receiving and transmitting system, and the quality of the received data is improved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (3)
1. A method for suppressing co-channel interference by quadrature phase shift keying is applied to a radar transceiving system, and is characterized in that the method comprises the following steps:
step S1, a transmitting unit of the radar transceiver system transmits a first radio frequency signal;
step S2, receiving a second rf signal formed by reflecting the first rf signal at a receiving unit of the radar transceiver system;
step S3, using a computing unit to divide the data in the second rf signal by the data in the first rf signal, so as to uniformly distribute the co-channel interference on the frequency spectrum;
in step S1, randomly generating a first pattern, a second pattern, a third pattern and a fourth pattern in the transmitting unit;
the first mode corresponds to a value of 1+ I, the I1 channel of the first mode is 0, and the Q1 channel of the first mode is 0;
the second mode corresponds to a value of-1 + I, the I2 channel of the second mode is 1, and the Q2 channel of the second mode is 0;
the third mode corresponds to a value of-1-I, the I3 channel of the third mode is 1, and the Q3 channel of the third mode is 1;
the fourth mode corresponds to a value of 1-I, the I4 channel of the fourth mode is 0, and the Q4 channel of the fourth mode is 1.
2. The method of claim 1, wherein the transmitting unit comprises:
a first transmitting module for transmitting a first transmitting signal;
a second transmitting module for transmitting a second transmitting signal;
the delay module is connected with the second transmitting module and used for delaying the second transmitting signal so as to process the second transmitting signal to obtain a delayed signal;
and the power synthesizer is respectively connected with the first transmitting module and the delay module and combines the first transmitting signal and the delay signal to modulate a quadrature phase signal.
3. The method of claim 2, wherein the delay module is a 90-degree delay module.
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| CN201910668599.9A CN110445510B (en) | 2019-07-23 | 2019-07-23 | Method for suppressing same frequency interference by quadrature phase shift keying |
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| CN201910668599.9A CN110445510B (en) | 2019-07-23 | 2019-07-23 | Method for suppressing same frequency interference by quadrature phase shift keying |
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| CN110445510B true CN110445510B (en) | 2022-05-31 |
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|---|---|---|---|---|
| US6249518B1 (en) * | 1998-08-07 | 2001-06-19 | Nortel Networks Limited | TDMA single antenna co-channel interference cancellation |
| CN105445706A (en) * | 2015-11-30 | 2016-03-30 | 超视距成都科技有限责任公司 | Same-frequency clutter interference cancellation apparatus and X wave band single antenna continuous wave radar system |
| CN106487727A (en) * | 2015-08-31 | 2017-03-08 | 北京大学 | A kind of full duplex self-interference removing method and full duplex system |
| CN106817134A (en) * | 2016-10-25 | 2017-06-09 | 张慧 | A kind of configurable full duplex radio network radar communication system |
| CN109932722A (en) * | 2017-12-18 | 2019-06-25 | 恩智浦美国有限公司 | For eliminating the device and method of interference signal |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790744B (en) * | 2012-07-18 | 2015-03-11 | 宁波大学 | Estimation method for signal interference noise ratio in orthogonal frequency division multiplexing system |
| KR102400669B1 (en) * | 2014-08-25 | 2022-05-20 | 론프록스 코퍼레이션 | Indoor position location using delayed scanned directional reflectors |
| CN105915239B (en) * | 2016-06-17 | 2018-05-08 | 电子科技大学 | A kind of method that while co-channel full duplex system and its coupling are chosen with predistortion RF disturbance reconstruction port number |
| CN107561502A (en) * | 2017-08-15 | 2018-01-09 | 武汉大学 | A kind of portable high frequency groundwave radar Radio frequency interference suppressing method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6249518B1 (en) * | 1998-08-07 | 2001-06-19 | Nortel Networks Limited | TDMA single antenna co-channel interference cancellation |
| CN106487727A (en) * | 2015-08-31 | 2017-03-08 | 北京大学 | A kind of full duplex self-interference removing method and full duplex system |
| CN105445706A (en) * | 2015-11-30 | 2016-03-30 | 超视距成都科技有限责任公司 | Same-frequency clutter interference cancellation apparatus and X wave band single antenna continuous wave radar system |
| CN106817134A (en) * | 2016-10-25 | 2017-06-09 | 张慧 | A kind of configurable full duplex radio network radar communication system |
| CN109932722A (en) * | 2017-12-18 | 2019-06-25 | 恩智浦美国有限公司 | For eliminating the device and method of interference signal |
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Denomination of invention: A method for suppressing co frequency interference using orthogonal phase shift keying Effective date of registration: 20231025 Granted publication date: 20220531 Pledgee: Industrial Bank Co.,Ltd. Shanghai Huashan sub branch Pledgor: NAWA ELECTRONICS (SHANGHAI) CO.,LTD. Registration number: Y2023310000674 |