CN103441770A - Wideband receiving channels, receiver and receiving method with amplitude and phase compensation - Google Patents
Wideband receiving channels, receiver and receiving method with amplitude and phase compensation Download PDFInfo
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Abstract
The invention relates to wideband receiving channels, a receiver and a receiving method with amplitude and phase compensation. The multiple channels work at the same time, and different bandwidth filters perform gate filtering to filter radar echo signals. Each channel comprises a first front middle module, a second front middle module and a control detection module. The first front middle modules receive the radar echo signals and perform phase shift, amplitude compensation and primary down-conversion on the radar echo signals, and then the radar echo signals are sent to the second front middle modules for secondary down-conversion; one path of a plurality of filter banks which are connected in parallel and different in bandwidth is gated according to signal bandwidth to perform medium frequency filtering, and meanwhile amplitude and phase compensation is further performed on the path of the filter banks; the control detection modules control the first front middle modules and the second front middle modules. Due to the wideband receiving channels, the receiver and the receiving method, the problem that a receiver is poor in consistency of amplitude and phase under wideband work frequency is solved, multiple medium frequency work bandwidths capable of being switched are acquired, and the advantages of being good in consistency of bandwidth, amplitude and phase and high in universality are achieved.
Description
Technical field
The present invention relates to Radar Receiver Technology, relate in particular to a kind of broadband reception passage, receiver and method of reseptance thereof of amplitude and phase compensation.
Background technology
Conventional radar receiver mostly is narrow-band receiver, even the receiver in broadband also only has a kind of fixed-bandwidth, causes radar function more single, and often is limited to amplitude and phase equalization problem, affects the performance of radar performance.In order to adapt to the growth requirement of multifunction radar, adopt the wideband phased array technology, the broadband receiver with multi-signal bandwidth has just arisen at the historic moment.
The key of broadband receiver is the device that adopts broadband, and adopts the method for science to carry out filtering, and filtering affects the spurious signal of receiver performance.Broadband receiver is because bandwidth requirement is high, and the components and parts kind that can select is just relatively less, and, bandwidth of operation widen the deterioration that is easy to cause the receiver spurious signal.Simultaneously, bandwidth widens the consistency that has also affected amplitude, phase place between each passage of receiver.
Summary of the invention
The first purpose of the present invention is to provide a kind of broadband reception passage of amplitude and phase compensation, has realized the consistency of different signals amplitude, phase place after receive path is processed, and effectively solves the deterioration problem of broadband signal spurious signal in receiving course.
The second purpose of the present invention is to provide a kind of broadband receiver of amplitude and phase compensation, has realized the consistency of amplitude, phase place between each passage, and effectively solves the deterioration problem of broadband signal spurious signal in receiving course.
The 3rd purpose of the present invention is to provide a kind of broadband receiving method of amplitude and phase compensation, has realized the consistency of different signals amplitude, phase place after broadband reception is processed, and effectively solves the deterioration problem of broadband signal spurious signal in the process received.
In order to realize above-mentioned the first purpose, the invention provides a kind of broadband reception passage of amplitude and phase compensation, comprise the first front middle module, the second front middle module and control detection module, wherein:
The described first front middle module, access a radar echo signal at its input, after described radar echo signal is carried out to low noise amplification, phase compensation and Amplitude Compensation successively, carry out mixing for the first time with one first local oscillation signal, thereby export one first intermediate-freuqncy signal;
The described second front middle module, access described the first intermediate-freuqncy signal at its input, and after it is carried out to Amplitude Compensation and Sensitivity Time control successively, carry out mixing for the second time with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and the be complementary filter of bandwidth of switching gating and described the second intermediate-freuqncy signal, described the second intermediate-freuqncy signal is carried out to filtering, finally described the second intermediate-freuqncy signal is carried out after automatic gain is controlled exporting an if radar echo-signal;
Described control detection module, with front module in front module in described first and described second, be connected, thereby, according to the frequency band range of described radar echo signal, the Sensitivity Time of controlling phase compensation function, Amplitude Compensation function and the described second front middle module of described the first front middle module is controlled function, automatic gain control function, Amplitude Compensation function and according to the be complementary filter of bandwidth of the bandwidth switching gating of described radar echo signal and described the second intermediate-freuqncy signal.
As preferably, the described first front middle module comprises low noise amplifier, phase compensation block, the first Amplitude Compensation module and the first frequency mixer connected successively, is used for described first local oscillation signal of described mixing for the first time to the access of described the first frequency mixer.
As preferably, the described second front middle module comprises successively filter, second filter selected on-off circuit and the automatic gain control circuit of the different bandwidth of the second Amplitude Compensation device of connecting, sensitivity time control, the second frequency mixer, the first filter selected on-off circuit, some parallel connections, and to described the second frequency mixer access described the second local oscillation signal for described mixing for the second time.
As preferably, described phase compensation block is a voltage-controlled phase shifter.
As preferably, described the first Amplitude Compensation module and described the second Amplitude Compensation module are an amplitude equalizer.
In order to realize above-mentioned the second purpose, the invention provides a kind of broadband receiver of amplitude and phase compensation, comprise some broadband reception passages, the first local oscillator module and the second local oscillator module, wherein:
Thereby described the first local oscillator module is carried out merit to one first former local oscillator signal and is divided and amplify and produce the first identical local oscillation signal of some roads, thereby described the second local oscillator module is carried out merit to one second former local oscillator signal and is divided and amplify and produce the second identical local oscillation signal of some roads, the first local oscillator module and the second local oscillator module be according to the port number that receives signal, and what be respectively each passage of receiving signal provides the first local oscillation signal and the second local oscillation signal;
Arbitrary broadband reception passage in described some broadband reception passages includes the described first front middle module, the described second front middle module and controls detection module, wherein:
The described first front middle module, access a radar echo signal at its input, after described radar echo signal is carried out to low noise amplification, phase compensation and Amplitude Compensation successively, carry out mixing for the first time with one first local oscillation signal, thereby export one first intermediate-freuqncy signal;
The described second front middle module, access described the first intermediate-freuqncy signal at its input, and after it is carried out to Amplitude Compensation and Sensitivity Time control successively, carry out mixing for the second time with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and the be complementary filter of bandwidth of switching gating and described the second intermediate-freuqncy signal, described the second intermediate-freuqncy signal is carried out to filtering, finally described the second intermediate-freuqncy signal is carried out after automatic gain is controlled exporting an if radar echo-signal;
Described control detection module, with front module in front module in described first and described second, be connected, thereby, according to the frequency band range of described radar echo signal, the Sensitivity Time of controlling phase compensation function, Amplitude Compensation function and the described second front middle module of described the first front middle module is controlled function, automatic gain control function, Amplitude Compensation function and according to the be complementary filter of bandwidth of the bandwidth switching gating of described radar echo signal and described the second intermediate-freuqncy signal.
As preferably, the described first front middle module comprises low noise amplifier, phase compensation block and the first Amplitude Compensation module connected successively, described the first local oscillation signal in the output access of described the first amplitude equalizer for described mixing for the first time.
As preferably, the described second front middle module comprises successively filter, second filter selected on-off circuit and the automatic gain control circuit of the different bandwidth of the second Amplitude Compensation device of connecting, sensitivity time control, the first filter selected on-off circuit, some parallel connections, and between described sensitivity time control and described filter switch access for described second local oscillation signal of described mixing for the second time.
As preferably, described phase compensation block is a voltage-controlled phase shifter.
As preferably, described the first Amplitude Compensation module and described the second Amplitude Compensation module are an amplitude equalizer.
In order to realize above-mentioned the 3rd purpose, the invention provides a kind of broadband receiving method of amplitude and phase compensation, comprise the following steps:
S1 a: radar echo signal is carried out successively low noise amplification, phase compensation and for the first time after Amplitude Compensation, with one first local oscillation signal, carries out mixing for the first time, obtain one first intermediate-freuqncy signal;
S2: after described the first intermediate-freuqncy signal is carried out to Amplitude Compensation, Sensitivity Time control for the second time successively, with one second local oscillation signal, carry out mixing for the second time, obtain one second intermediate-freuqncy signal;
S3: according to the bandwidth of described radar echo signal, the filter be complementary with described the second intermediate-freuqncy signal bandwidth in the filter of the different bandwidth of the some parallel connections of switching gating, carry out filtering to described the second intermediate-freuqncy signal;
S4: described the second intermediate-freuqncy signal is carried out after automatic gain is controlled exporting an if radar echo-signal.
As preferably, described phase compensation is for realizing by a voltage-controlled phase shifter.
As preferably, described Amplitude Compensation for the first time and described Amplitude Compensation for the second time are by an amplitude equalizer, to realize respectively.
The present invention, owing to adopting above technical scheme, makes it compared with prior art, has following advantage and good effect:
1) phase compensation, Amplitude Compensation technology have been adopted, difference according to each channel phases, control corresponding phase compensation amount, and in real time the first intermediate frequency and the second intermediate-freuqncy signal are carried out to Amplitude Compensation, realized the coherence request of different signals amplitude, phase place after receive path is processed.
2) designed the filter of some parallel connections, bandwidth according to radar echo signal, switch corresponding filter the second intermediate-freuqncy signal is carried out to filtering, effectively solve the deterioration of spurious signal in the broadband signal receiving course, and realized the multiple intermediate frequency bandwidth of operation that can switch.
The accompanying drawing explanation
The structured flowchart of the broadband receiver that Fig. 1 is a kind of amplitude and phase compensation of the present invention;
The structured flowchart that Fig. 2 is the first broadband reception passage 1 in Fig. 1;
The flow chart of the broadband receiving method that Fig. 3 is a kind of amplitude and phase compensation of the present invention.
Embodiment
Further illustrate the present invention with specific embodiment with reference to the accompanying drawings.
Referring to the accompanying drawing that the embodiment of the present invention is shown, hereinafter the present invention will be described in more detail.Yet the present invention can be with many multi-form realizations, and should not be construed as the restriction of the embodiment be subject in this proposition.On the contrary, it is abundant and complete open in order to reach proposing these embodiment, and makes those skilled in the art understand scope of the present invention fully.
Embodiment mono-
The block diagram of the broadband receiver that accompanying drawing 1 is a kind of amplitude and phase compensation provided by the invention, as a preferred embodiment of the broadband reception passage of a kind of amplitude and phase compensation provided by the invention, it comprises:
The first broadband reception passage 1 and the second broadband reception passage 2, the first local oscillator module 3 and the second local oscillator module 4, wherein:
Thereby the former local oscillator signal 31 of the first 3 pairs of local oscillator modules one first carries out merit to be divided and amplifies and produce the first identical local oscillation signal 32 of some roads, thereby the former local oscillator signal 41 of the second 4 pairs of local oscillator modules one second carries out merit to be divided and amplifies and produce the second local oscillation signal 42, the first local oscillator modules 3 that two-way is identical and the second local oscillator module 4 and be respectively the first broadband reception passage 1 and the second broadband reception passage 2 that receive signal the first local oscillation signal 32 and the second local oscillation signal 42 are provided.
Each receive path circuit design of multichannel receiver is consistent, for radar system, can be divided into and passage, gun parallax passage, trim passage and accessory channel etc.Should be understood that the present invention does not do restriction to the quantity of bandwidth receive path, can be also three, four or more, and the present embodiment be take and elaborated as example containing the broadband receiver of two passages, and the situation of other numbers of channels should the rest may be inferred.
Internal structure in the first broadband reception passage 1 and the second broadband reception passage 2 is in full accord, and the first broadband reception passage 1 of take is example, and as shown in Figure 1, comprise the first front middle module 12 of front middle module 11, second and control detection module 13, wherein:
The first front middle module 11 comprises low noise amplifier 111, phase compensation block 112, the first Amplitude Compensation module 113 and the first frequency mixer 114 connected successively, the first local oscillation signal 32 to the interior access of the first frequency mixer 114 for mixing for the first time.
According to the difference of each channel phases, control corresponding phase compensation amount.The preferred voltage-controlled phase shifter of phase compensation block 113, it just can regulate control to phase shifter by a voltage, also can adopt digital phase shifter etc.The first Amplitude Compensation module adopts an amplitude equalizer, amplitude equalizer is passive device, than thering is larger insertion loss under low-signal frequencies, there is less insertion loss under higher signal frequencies, therefore can the amplitude imbalance of signal be compensated in real time in broadband range.Its median filter can be the LC filter, Surface Acoustic Wave Filter, LTCC filter etc.
The second front middle module 12 comprises successively filter 125, the second filter selected on-off circuit 126 and the automatic gain control circuit 127 of the different bandwidth of the second Amplitude Compensation device 121 of connecting, sensitivity time control 122, the second frequency mixer 123, the first filter selected on-off circuit 124, four parallel connections, and to access in the second frequency mixer 123 the second local oscillation signal 42 for mixing for the second time.
The second Amplitude Compensation module also adopts an amplitude equalizer.And sensitivity time control makes receiver prevent the random wave interference intermediate frequency amplifier of short range in the process that receives signal.Adopted the filter parallel connection of four different bandwidths herein, and by filter 125 front and back of the different bandwidth four parallel connections, the first filter selected on-off circuit 124 and the second filter selected on-off circuit 126 are set respectively, when a filter of gating, can isolate more up hill and dale the interference of other three filters.According to the bandwidth of radar echo signal, switch corresponding filter the second intermediate-freuqncy signal 127 is carried out to filtering, effectively solve the deterioration of spurious signal in the broadband signal receiving course, and the selection of multi-signal bandwidth is provided.
Should be understood that the present invention does not do restriction to the quantity of the filter of the obstructed bandwidth of parallel connection, also can be two, three, five etc.
The course of work of described radar echo signal receiver channel is:
After the first front middle module input accesses a radar echo signal, after radar echo signal is carried out to low noise amplification, phase compensation and Amplitude Compensation successively by the control detection module, carry out mixing for the first time with one first local oscillation signal, thereby export one first intermediate-freuqncy signal 115, the first Amplitude Compensation module is an amplitude equalizer, the second front middle module, access the first intermediate-freuqncy signal at its input, and after it is carried out to Amplitude Compensation and Sensitivity Time control successively, carry out mixing for the second time with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and the be complementary filter of bandwidth of switching gating and the second intermediate-freuqncy signal, described the second intermediate-freuqncy signal is carried out to filtering, finally described the second intermediate-freuqncy signal is carried out after automatic gain is controlled exporting an if radar echo-signal 128, the echo signal of intermediate frequency 128 of the last output of this broadband receiver has certain bandwidth, meet amplitude and phase equalization requirement, can carry out the signal processing.
Embodiment bis-
The flow chart of the broadband receiving method that accompanying drawing 3 is a kind of amplitude and phase compensation of the present invention, the below broadband receiving method of detailed description a kind of amplitude and phase compensation provided by the invention.
S1 a: radar echo signal is carried out to low noise amplification, phase compensation and for the first time after Amplitude Compensation successively, carry out mixing for the first time with one first local oscillation signal, obtain one first intermediate-freuqncy signal, wherein the adequate compensation of phase compensation for making according to the phase place of radar echo signal.
Phase compensation is for what realize by a voltage-controlled phase shifter, and it just can regulate control to phase shifter by a voltage, also can adopt digital phase shifter etc.Amplitude Compensation is to realize by an amplitude equalizer for the first time.Amplitude equalizer is passive device, than having larger insertion loss under low-signal frequencies, has less insertion loss under higher signal frequencies, therefore can the amplitude imbalance of signal be compensated in real time in broadband range.By phase compensation, Amplitude Compensation technology, difference according to each channel phases, control corresponding phase compensation amount, and in real time the first intermediate frequency and the second intermediate-freuqncy signal are carried out to Amplitude Compensation, realized the coherence request of different signals amplitude, phase place after receive path is processed.
S2: after the first intermediate-freuqncy signal is carried out to Amplitude Compensation, Sensitivity Time control for the second time successively, with one second local oscillation signal, carry out mixing for the second time, obtain one second intermediate-freuqncy signal.
Sensitivity Time Control Technique is the common technology in radar, and it makes receiver sensitivity in pulses of radiation moment decline, a kind of technology then increased according to certain rules for avoiding nearly thing noise jamming.Amplitude Compensation is also to realize by an amplitude equalizer for the second time.
S3: according to the bandwidth of radar echo signal, the filter be complementary with the second intermediate-freuqncy signal bandwidth in the filter of the different bandwidth of the some parallel connections of switching gating, carry out filtering to the second intermediate-freuqncy signal;
The present embodiment, by the filter of some parallel connections, according to the bandwidth of radar echo signal, switches corresponding filter the second intermediate-freuqncy signal is carried out to filtering, effectively solves the deterioration of spurious signal in the broadband signal receiving course, and the selection of multi-signal bandwidth is provided.Its median filter can be the LC filter, Surface Acoustic Wave Filter, LTCC filter etc.
S4: the second intermediate-freuqncy signal is carried out after automatic gain is controlled exporting an if radar echo-signal.
Wherein, the effect that automatic gain is controlled is automatically to adjust the gain of amplifier according to the size of the voltage of input signal, makes the output voltage of amplifier change within the specific limits, can carry out follow-up signal and process.
Above-mentioned disclosed be only specific embodiments of the invention, this embodiment is only that clearer explanation the present invention is used, and limitation of the invention not, the changes that any person skilled in the art can think of, all should drop in protection range.
Claims (13)
1. the broadband reception passage of an amplitude and phase compensation, is characterized in that, comprise the first front middle module, the second front middle module and control detection module, wherein:
The described first front middle module, access a radar echo signal at its input, after described radar echo signal is carried out to low noise amplification, phase compensation and Amplitude Compensation successively, carry out mixing for the first time with one first local oscillation signal, thereby export one first intermediate-freuqncy signal;
The described second front middle module, access described the first intermediate-freuqncy signal at its input, and after it is carried out to Amplitude Compensation and Sensitivity Time control successively, carry out mixing for the second time with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and the be complementary filter of bandwidth of switching gating and described the second intermediate-freuqncy signal, described the second intermediate-freuqncy signal is carried out to filtering, finally described the second intermediate-freuqncy signal is carried out after automatic gain is controlled exporting an if radar echo-signal;
Described control detection module, with front module in front module in described first and described second, be connected, thereby, according to the frequency band range of described radar echo signal, the Sensitivity Time of controlling phase compensation function, Amplitude Compensation function and the described second front middle module of described the first front middle module is controlled function, automatic gain control function, Amplitude Compensation function and according to the be complementary filter of bandwidth of the bandwidth switching gating of described radar echo signal and described the second intermediate-freuqncy signal.
2. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 1, it is characterized in that, the described first front middle module comprises low noise amplifier, phase compensation block, the first Amplitude Compensation module and the first frequency mixer connected successively, is used for described first local oscillation signal of described mixing for the first time to the access of described the first frequency mixer.
3. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 2, it is characterized in that, the described second front middle module comprises successively filter, second filter selected on-off circuit and the automatic gain control circuit of the different bandwidth of the second Amplitude Compensation device of connecting, sensitivity time control, the second frequency mixer, the first filter selected on-off circuit, some parallel connections, and to described the second frequency mixer access described the second local oscillation signal for described mixing for the second time.
4. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 2, is characterized in that, described phase compensation block is a voltage-controlled phase shifter.
5. a kind of broadband reception passage of amplitude and phase compensation as claimed in claim 2 or claim 3, is characterized in that, described the first Amplitude Compensation module and described the second Amplitude Compensation module are an amplitude equalizer.
6. the broadband receiver of an amplitude and phase compensation, is characterized in that, comprises some broadband reception passages, the first local oscillator module and the second local oscillator module, wherein:
Thereby described the first local oscillator module is carried out merit to one first former local oscillator signal and is divided and amplify and produce the first identical local oscillation signal of some roads, thereby described the second local oscillator module is carried out merit to one second former local oscillator signal and is divided and amplify and produce the second identical local oscillation signal of some roads, the first local oscillator module and the second local oscillator module, according to the port number that receives signal, are respectively each passage that receives signal the first local oscillation signal and the second local oscillation signal are provided;
Arbitrary broadband reception passage in described some broadband reception passages includes the first front middle module, the second front middle module and controls detection module, wherein:
The described first front middle module, access a radar echo signal at its input, after described radar echo signal is carried out to low noise amplification, phase compensation and Amplitude Compensation successively, carry out mixing for the first time with one first local oscillation signal, thereby export one first intermediate-freuqncy signal;
The described second front middle module, access described the first intermediate-freuqncy signal at its input, and after it is carried out to Amplitude Compensation and Sensitivity Time control successively, carry out mixing for the second time with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and the be complementary filter of bandwidth of switching gating and described the second intermediate-freuqncy signal, described the second intermediate-freuqncy signal is carried out to filtering, finally described the second intermediate-freuqncy signal is carried out after automatic gain is controlled exporting an if radar echo-signal;
Described control detection module, with front module in front module in described first and described second, be connected, thereby, according to the frequency band range of described radar echo signal, the Sensitivity Time of controlling phase compensation function, Amplitude Compensation function and the described second front middle module of described the first front middle module is controlled function, automatic gain control function, Amplitude Compensation function and according to the be complementary filter of bandwidth of the bandwidth switching gating of described radar echo signal and described the second intermediate-freuqncy signal.
7. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 6, it is characterized in that, the described first front middle module comprises low noise amplifier, phase compensation block, the first Amplitude Compensation module and the first frequency mixer connected successively, is used for described first local oscillation signal of described mixing for the first time to the access of described the first frequency mixer.
8. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 7, it is characterized in that, the described second front middle module comprises successively filter, second filter selected on-off circuit and the automatic gain control circuit of the different bandwidth of the second Amplitude Compensation device of connecting, sensitivity time control, the second frequency mixer, the first filter selected on-off circuit, some parallel connections, and to described the second frequency mixer access described the second local oscillation signal for described mixing for the second time.
9. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 7, is characterized in that, described phase compensation block is a voltage-controlled phase shifter.
10. a kind of broadband reception passage of amplitude and phase compensation as claimed in claim 7 or 8, is characterized in that, described the first Amplitude Compensation module and described the second Amplitude Compensation module are an amplitude equalizer.
11. the broadband receiving method of an amplitude and phase compensation, is characterized in that, comprises the following steps:
S1 a: radar echo signal is carried out successively low noise amplification, phase compensation and for the first time after Amplitude Compensation, with one first local oscillation signal, carries out mixing for the first time, obtain one first intermediate-freuqncy signal;
S2: after described the first intermediate-freuqncy signal is carried out to Amplitude Compensation, Sensitivity Time control for the second time successively, with one second local oscillation signal, carry out mixing for the second time, obtain one second intermediate-freuqncy signal;
S3: according to the bandwidth of described radar echo signal, the filter be complementary with described the second intermediate-freuqncy signal bandwidth in the filter of the different bandwidth of the some parallel connections of switching gating, carry out filtering to described the second intermediate-freuqncy signal;
S4: described the second intermediate-freuqncy signal is carried out after automatic gain is controlled exporting an if radar echo-signal.
12. the broadband receiving method of a kind of amplitude and phase compensation as claimed in claim 11, is characterized in that, described phase compensation is to realize by a voltage-controlled phase shifter.
13. the broadband receiving method of a kind of amplitude and phase compensation as claimed in claim 11, is characterized in that, described Amplitude Compensation for the first time and described Amplitude Compensation for the second time are by an amplitude equalizer, to realize respectively.
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