CN110048730A - A kind of track receiver channel of two kinds of tracking systems of compatibility - Google Patents
A kind of track receiver channel of two kinds of tracking systems of compatibility Download PDFInfo
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Abstract
A kind of track receiver channel of two kinds of tracking systems of compatibility, under single channel monopulse tracing mode, after tributary signal, poor tributary signal respectively warp and branch low noise amplification module, poor branch low noise amplification module amplification, into tracking modulation module formation amplitude modulation single-pulse single-channel signal.First intermediate frequency amplification module, the second intermediate frequency amplification module gain are controlled by closed loop AGC, while output closed-loop AGC telemetering voltage VAGCTM1For capturing, losing lock judgement；Under extreme value following mode, poor branch low noise amplification module power-off does not work and signal passes through tracking modulation module after amplifying with branch low noise amplification module.The gain-controlled voltage open loop multiple-rank control that first intermediate frequency amplification module, the second intermediate frequency amplification module gain are input from the outside, while exporting the open loop AGC telemetering voltage V of big slopeAGCTM2It is adjudicated for extreme value following.The present invention realizes simple, high reliablity, compatible two kinds of tracking systems of single channel single-pulse track and extreme value following.
Description
Technical field
The present invention relates to a kind of track receiver channel of two kinds of tracking systems of compatibility, be suitable for single channel monopulse angle with
Track system and extreme value following system, belong to Radiometric technical field.
Background technique
Single channel monopulse tracking system is tracked using difference signal, and the direction that driving antenna reduces to difference signal turns
Dynamic, tracking accuracy is high, but difference beam magnitude-phase characteristics variation will affect tracking performance, lead to not automatically track when serious.Extreme value
Tracking is increased and decreased differentiation, the direction rotation that driving antenna increases to signal power, tracking according to receive and signal power
Precision is low, but requires antenna performance relatively low.
China's two generations repeater satellite inter-satellite link antenna uses Mesh reflector, and working frequency range is high, bore is big, reflecting surface
Surface accuracy is difficult to ensure.Surface accuracy variation can be brought to be declined with beam gain, and difference beam magnitude-phase characteristics is deteriorated, and influences single-pass
Road single-pulse track precision, will cause when serious can not track.To guarantee that two generation repeater satellite acquisition and tracking systems are in-orbit reliable
Operation, the acquisition and tracking mode that design single channel monopulse angle tracking is combined with extreme value following are in-orbit with single channel monopulse
Based on angle tracking mode, if antenna reflective face surface accuracy leads to difference beam distortion effects tracking performance, switch to extreme value with
Track mode.
Repeater satellite needs to complete the tracking to different trunk subscriber terminals, the tune of different trunk subscriber number of terminals communications number
Mode processed, bit rate, transmission power are not quite similar, therefore, the signal level dynamic model of repeater satellite track receiver input terminal
>=40dB is enclosed, characterization is low with the AGC telemetering voltage value resolution ratio of signal power in former track receiver, under extreme value following mode
Directly affect the precision of tracking.
Not increase on-board equipment quantity, urgent need, which designs one kind, can be compatible with single channel single-pulse track and extreme value following two
The receiver channel of kind tracking system, is switched by instructing under two kinds of operating modes, to adapt to the new need of two generation repeater satellites
It asks.
The existing receiver implementation method that can be compatible with single channel single-pulse track and extreme value following are as follows: pass through single channel tune
The radiofrequency signal of system after frequency conversion is amplified to intermediate frequency, by DSP CONTROL demodulator in digital demodulation unit with
Digital down converter, log power, signal-to-noise ratio, the azimuthal error electricity for obtaining echo signal by digital signal processing algorithm again
Pressure, pitch error voltage.The main deficiency of this method has: the nominal input signal for single channel monopulse tracking and extreme value following
The AGC telemetry value of power is obtained using same procedure, and when incoming signal level dynamic range is big, AGC telemetering resolution ratio is low, is influenced
Extreme value following precision.Therefore, it is not suitable for the big extreme value following mode of incoming signal level dynamic range.
Summary of the invention
Summary of the invention of the invention are as follows: overcome the deficiencies of the prior art and provide a kind of adaptation incoming signal level dynamic model
Enclose big, the track receiver channel of compatible two kinds of tracking systems of single channel single-pulse track and extreme value following.
The technical solution of the invention is as follows: a kind of track receiver channel of two kinds of tracking systems of compatibility, including and branch
Road low noise amplification module, poor branch low noise amplification module, tracking modulation module, frequency conversion and amplification module, function sub-module,
AGC detection module, envelope detection module, operational amplifier A, operational amplifier B, operational amplifier C, either-or switch A and two
Select a switch B；
When either-or switch A switches to output closed-loop AGC voltage, either-or switch B switches to output closed-loop AGC telemetering electricity
Press VAGCTM1When, channel enters single channel monopulse tracing mode, at this point, either-or switch A exports AGC voltage VAGCTo frequency conversion and
Amplification module realizes gain closed-loop control；Either-or switch B output closed-loop AGC telemetering voltage VAGCTM1For capturing, losing lock sentences
Certainly；
When either-or switch A switches to output gain control voltage, either-or switch B switches to output open loop AGC telemetering
Voltage VAGCTM2When, channel enters extreme value following mode, at this point, either-or switch A output gain controls voltage to frequency conversion and amplification
Module realizes gain opened loop control；Either-or switch B exports open loop AGC telemetering voltage VAGCTM2It is adjudicated for extreme value following；
With branch low noise amplification module to and signal Σ carry out low noise amplification export to tracking modulation module；Poor branch
Low noise amplification module carries out low noise amplification to difference signal Δ and exports to tracking modulation module；
Under single channel monopulse tracing mode, tracking modulation module carries out phase shift modulated to received and signal and difference signal
Processing obtains amplitude modulation single channel monopulse signal, output to the first frequency mixing module；Under extreme value following mode, modulation module is tracked
Only as the channel with signal, received and signal is directly output to the first frequency mixing module；
Frequency conversion and amplification module using output signal of the externally input local oscillation signal to track modulator carry out frequency conversion and
Gain amplification disposal obtains intermediate-freuqncy signal IF, output to function sub-module；
Intermediate-freuqncy signal IF constant power is divided into two-way by function sub-module, is all the way intermediate-freuqncy signal IF1, output to AGC detection mould
Block；Another way is intermediate-freuqncy signal IF2, output to envelope detection module；
The power of AGC detection module detection input intermediate-freuqncy signal IF1, obtain one it is directly proportional to input signal power straight
Galvanic electricity pressure, while output is amplified to operational amplifier A, operational amplifier B and operational amplifier C；
Envelope detection module removes the carrier wave of intermediate-freuqncy signal IF2, extracts angular error signal envelope, amplified output angle
Error signal；
Operational amplifier A carries out operation amplifier to AGC detection module output DC voltage, closes to either-or switch A output
Ring AGC voltage VAGC；Operational amplifier B carries out operation amplifier to AGC detection module output DC voltage, defeated to either-or switch B
Closed loop AGC telemetering voltage V outAGCTM1；Operational amplifier C carries out operation amplifier to AGC detection module output DC voltage, to two
A switch B is selected to export open loop AGC telemetering voltage VAGCTM2。
The frequency conversion and amplification module include the first frequency mixing module, the first intermediate frequency amplification module, the second frequency mixing module and the
Two intermediate frequency amplification modules；
Under single channel monopulse tracing mode, either-or switch A exports AGC voltage VAGCTo the first intermediate frequency amplification module and
Second intermediate frequency amplification module realizes gain closed-loop control；
Under extreme value following mode, either-or switch A output gain controls voltage into the first intermediate frequency amplification module and second
Frequency amplification module realizes gain opened loop control；
First frequency mixing module carries out signal using output signal of externally input first local oscillation signal to track modulator
Down coversion obtains the first intermediate-freuqncy signal, output to the first intermediate frequency amplification module；
First intermediate frequency amplification module exports after carrying out gain amplification to the first intermediate-freuqncy signal to the second frequency mixing module；
Second frequency mixing module using externally input second local oscillation signal to the output signal of the first intermediate frequency amplification module into
Row signal down coversion obtains the second intermediate-freuqncy signal, output to the second intermediate frequency amplification module；
Second intermediate frequency amplification module obtains intermediate-freuqncy signal IF after carrying out gain amplification to received signal, and output to function divides mould
Block.
The tracking modulation module includes and channel phase shifter, poor channel modulator and combiner；
Under single channel monopulse tracing mode and channel phase shifter is completed according to external command and 0-360 ° of range of signal
Interior phase shift；Poor channel modulator reference signal f1 (t), f2 (t) control under, four phase tune are carried out to the difference signal of input
System；Combiner is added to form amplitude modulation single channel monopulse signal with signal, difference signal to above-mentioned phase shift with modulated；
Under extreme value following mode, poor channel modulator does not work in tracking modulation module and channel phase shifter is placed in fixation
Phase, track modulator are only used as the channel with tributary signal.
The timing processed that the difference channel modulator carries out four phase modulation to the difference signal of input is 0 ° -> 90 ° -> 270 ° ->
180°。
Reference signal f1 (t) and f2 (t) is the square-wave signal for the phase coherence that duty ratio is 50%, and the frequency of f1 (t) is
2 times of f2 (t).
The difference signal Δ is the difference signal of antenna feed output, is the arrow of gun parallax signal delta A and trim signal delta E
Amount and, Δ A and Δ E are orthogonal.
Described and signal Σ is that feed output and signal, Σ and Δ A same-phase, Δ E are vertical with Δ A.
Single channel monopulse tracing mode realizes that process is as follows:
(d1) ground sends operating mode switching command, switches either-or switch A to output closed-loop AGC voltage VAGC, switching
Either-or switch B to output closed-loop AGC telemetering voltage VAGCTM1；
(d2) and signal Σ passes through and branch low noise amplification module, difference signal Δ are by poor branch low noise amplification module
Afterwards, into tracking modulation module, tracking modulation module exports amplitude modulation single-pulse single-channel signal after treatment；
(d3) amplitude modulation single-pulse single-channel signal is successively through the first frequency mixing module, the first intermediate frequency amplification module, the second mixing
After module and the second intermediate frequency amplification module, intermediate-freuqncy signal IF is exported；
(d4) intermediate-freuqncy signal IF passes through function sub-module, is divided into intermediate-freuqncy signal IF1 and intermediate-freuqncy signal IF2；
(d5) intermediate-freuqncy signal IF1 enters AGC detection module, obtains DC voltage, generates and closes after operational amplifier A amplification
Ring AGC voltage VAGC, the gain of the first intermediate frequency amplification module and the second intermediate frequency amplification module is controlled, realizes and equipment is increased
The automated closed-loop control of benefit；The DC voltage that AGC detection module obtains generates closed loop AGC telemetering after operational amplifier B amplification
Voltage VAGCTM1Output, as system acquisition, the judgement foundation of losing lock；
(d6) intermediate-freuqncy signal IF2 enters envelope detection module 10, and detection goes out angular error signal and exports.
Extreme value following mode realizes that process is as follows:
(j1) ground sends operating mode switching command, and switching either-or switch A to output gain controls voltage, switching two
Select a switch B to output open loop AGC telemetering voltage VAGCTM2；Ground sends poor branch low noise amplification module cut-offing instruction simultaneously；
(j2) according to echo signal characteristic and level range, external input gain-controlled voltage amplifies mould to the first intermediate frequency
Block and the second intermediate frequency amplification module gain are controlled；
(j3) and signal Σ successively by and branch low noise amplification module, tracking modulation module, the first frequency mixing module, the
One intermediate frequency amplification module, the second frequency mixing module and the second intermediate frequency amplification module export intermediate-freuqncy signal IF；
(j4) intermediate-freuqncy signal IF passes through function sub-module, is divided into two-way intermediate-freuqncy signal IF1 and intermediate-freuqncy signal IF2；
(j5) intermediate-freuqncy signal IF1 enters AGC detection module, obtains DC voltage, generates and opens after operational amplifier C amplification
Ring AGC telemetering voltage VAGCTM2, and export, the judgement foundation as the rotation of extreme value following antenna；
(j6) intermediate-freuqncy signal IF2 enters envelope detection module, and output signal is not reprocessed.
In the step (j2), the specific method is as follows for gain control:
Input and signal Σ are by dynamic range progress stepping, every grade of mdB, every grade of corresponding gain-controlled voltage of correspondence；Root
According to the characteristic that will track echo signal, gain-controlled voltage is injected, controls the first intermediate frequency amplification module and the amplification of the second intermediate frequency
The channel gain of module guarantees the intermediate-freuqncy signal IF function of the second intermediate frequency amplification module output within the scope of input and every grade of mdB of signal
Rate >=9dBm；M is 0 natural number.
The advantages of the present invention over the prior art are that:
(1) present invention is using closed loop AGC single channel single-pulse track compatible with the method realization of open-loop gain control switching
The receiver of system and extreme value following system realizes simple, high reliablity；
(2) present invention improves output using method of the gain multiple-rank control in conjunction with AGC detection under extreme value following mode
AGC telemetering voltage VAGCTM2Resolution ratio, adapt to input signal Larger Dynamic range.
Detailed description of the invention
Fig. 1 is the principle of the present invention block diagram；
Fig. 2 is benchmark signal f1 (t), f2 (t) schematic diagram.
Specific embodiment
The present invention is connect using the tracking of closed loop AGC two kinds of tracking systems compatible with the method realization of open-loop gain control switching
Receipts machine channel, functional block diagram are as shown in Figure 1.
A specific embodiment of the invention is explained in further detail with reference to the accompanying drawing.Be based on when specific implementation but
It is not limited to the following conditions:
What it is with input is 26GHz with signal, difference signal frequency；When the inclined half beam width of antenna, output is sent to the sum of channel
Signal power is in -100~-60dBm range, for difference signal power ratio and the low 5dB of signal power:
Specific embodiment is as follows:
The track receiver channel of the compatible two kinds of tracking systems of the present invention as shown in Figure 1:, by with branch low noise amplification mould
Block 1, poor branch low noise amplification module 2, tracking modulation module 3, frequency conversion and amplification module, function sub-module 8, AGC detection module
9, envelope detection module 10, operational amplifier A 11, operational amplifier B 12, operational amplifier C 13, either-or switch A 14,
Either-or switch B 15 is constituted.Frequency conversion and amplification module include the first frequency mixing module 4, the mixing of the first intermediate frequency amplification module 5, second
Module 6 and the second intermediate frequency amplification module 7.
Either-or switch A 14 realizes output gain control electricity under the control of externally input operating mode switching command
Pressure and output AGC voltage VAGCSwitching, output voltage to the first intermediate frequency amplification module 5 and the second intermediate frequency amplification module 7, realize
Gain control.Under single channel monopulse tracing mode, V is exportedAGCAmplify mould to the first intermediate frequency amplification module 5 and the second intermediate frequency
Block 7 realizes gain closed-loop control；Under extreme value following mode, output gain controls voltage to the first intermediate frequency amplification module 5 and the
Two intermediate frequency amplification modules 7 realize gain opened loop control.
Either-or switch B 15 realizes output closed-loop AGC telemetering voltage V under the control of operating mode switching commandAGCTM1
With output open loop AGC telemetering voltage VAGCTM2Switching.Under single channel monopulse tracing mode, output closed-loop AGC telemetering voltage
VAGCTM1For capturing, losing lock judgement；Under extreme value following mode, open loop AGC telemetering voltage V is exportedAGCTM2For extreme value following
Judgement.
When multi-channel operation is in single channel monopulse tracing mode, either-or switch A switch to output closed-loop AGC voltage,
Either-or switch B switches to output closed-loop AGC telemetering voltage VAGCTM1；When multi-channel operation is in extreme value following mode, alternative is opened
Pass A switches to output gain control voltage, either-or switch B switches to output open loop AGC telemetering voltage VAGCTM2。
Either-or switch A14 and either-or switch B15 synchronism switching.
With branch low noise amplification module 1, the low noise amplification mould that poor branch low noise amplification module 2 is same design
Block, gain are >=40dB, and noise coefficient≤2.5dB, module can be by external command, independent plus power-off.With branch low noise
Amplification module 1 to and signal Σ carry out low noise amplification, poor branch low noise amplification module 2 to difference signal Δ carry out low noise put
Greatly.Through exporting to tracking with branch low noise amplification module 1 and the amplified signal of poor branch low noise amplification module 2 and modulating mould
Block 3.Difference signal Δ is the difference signal of antenna feed output, is the vector sum of gun parallax signal delta A and trim signal delta E, Δ A
It is orthogonal with Δ E；It is feed output and signal with signal Σ.Σ and Δ A same-phase, Δ E are (i.e. also vertical with Σ) with Δ A.
Tracking modulation module 3 with channel phase shifter 31, poor channel modulator 32, combiner 35 by forming.In single channel list
It is completed and the phase shift within the scope of 0-360 ° of signal with channel phase shifter 31 according to external command under pulse tracking mode；Poor channel
Modulator 32 reference signal f1 (t), f2 (t) control under, four phase modulation are carried out to the difference signal of input, modulation timing is
0°->90°->270°->180°；Combiner 33 is added to form amplitude modulation single channel monopulse signal with signal, difference signal to above-mentioned.
Under extreme value following mode, poor channel modulator 32 does not work and channel phase shifter 31 is placed in stationary phase, and track modulator 3 is only
As the channel with tributary signal.
As shown in Fig. 2, reference signal f1 (t) and f2 (t) are the square-wave signal for the phase coherence that duty ratio is 50%, f1
(t) frequency is 2 times of f2 (t), and the frequency range of f1 (t) is several hundred Hz to several kHz.As the frequency of f1 (t) can be chosen for
The frequency of 1kHz, f2 (t) can be chosen for 500Hz.
First frequency mixing module 4 uses double balanced mixer, gain >=-10dB, externally input first local oscillator signal frequency
22GHz, signal power 7dBm export the first IF signal frequency 4GHz.First frequency mixing module 4 utilizes externally input first
The signal that shakes carries out signal down coversion to the output signal of track modulator 3, obtains the first intermediate-freuqncy signal, output to the first intermediate frequency is put
Big module 5.
First intermediate frequency amplification module 5 is VGC amplification module, is made of amplifier and electrically controlled attenuator, maximum gain >=
30dB, gain control range >=20dB.First intermediate frequency amplification module 5 carries out after gain amplification output to the to the first intermediate-freuqncy signal
Two frequency mixing modules 6.
Second frequency mixing module 6 uses double balanced mixer, gain >=-8dB, externally input second local oscillation signal frequency
3.93GHz, signal power 7dBm export the second IF signal frequency 70MHz.Second frequency mixing module 6 utilizes externally input the
Two local oscillation signals carry out signal down coversion to the output signal of the first intermediate frequency amplification module 5, obtain the second intermediate-freuqncy signal, output is extremely
Second intermediate frequency amplification module 7.
Second intermediate frequency amplification module 7 is VGC amplification module, is made of amplifier and electrically controlled attenuator, maximum gain >=
30dB, gain control range >=20dB.Second intermediate frequency amplification module 7 obtains intermediate frequency letter after carrying out gain amplification to received signal
Number IF, output to function sub-module 8.
Intermediate-freuqncy signal IF constant power is divided into two-way by function sub-module 8, is all the way intermediate-freuqncy signal IF1, output to AGC detection mould
Block 9；Another way is intermediate-freuqncy signal IF2, output to envelope detection module 10.
The power of the detection input of AGC detection module 9 intermediate-freuqncy signal IF1, obtains the straight of a characterization input end signal power
Galvanic electricity pressure, while output is amplified to operational amplifier A 11, operational amplifier B 12 and operational amplifier C 13.
Envelope detection module 10 extracts intermediate-freuqncy signal IF2 angular error signal envelope, amplified output angular error signal；
Operational amplifier A 11 completes the operation amplifier that AGC detection module 9 exports DC voltage, realizes single channel monopulse
The control of tracing mode lower channel gain closed-loop, input and signal power are in -100dBm~-60dBm range, the amplification of the second intermediate frequency
Second IF signal levels 9dBm~11dBm that module 4 exports.
Operational amplifier B 12 complete AGC detection module 9 export DC voltage operation amplifier, single channel monopulse with
Under track mode, output closed-loop AGC telemetering voltage VAGCTM1Within the scope of 0~5V.
Operational amplifier C 13 completes the operation amplifier that AGC detection module 9 exports DC voltage, in extreme value following mode
Under, export open loop AGC telemetering voltage VAGCTM2Within the scope of 0~5V.
Specifically, two kinds of operating mode particular contents of inventive receiver are as follows:
(1) single channel monopulse tracing mode
(d1) ground sends operating mode switching command, switches either-or switch A 14 to output closed-loop AGC voltage VAGC,
Switch either-or switch B 15 to output closed-loop AGC telemetering voltage VAGCTM1；
(d2) and signal Σ, difference signal Δ pass through respectively and branch low noise amplification module 1, poor branch low noise amplification mould
After block 2, into tracking modulation module 3, tracking modulation module 3 exports amplitude modulation single-pulse single-channel signal after treatment；
(d3) amplitude modulation single-pulse single-channel signal is mixed mould through the first frequency mixing module 4, the first intermediate frequency amplification module 5, second
After block 6, the second intermediate frequency amplification module 7, output frequency 70MHz, signal power
The intermediate-freuqncy signal IF of 9dBm~11dBm.
(d4) intermediate-freuqncy signal IF passes through function sub-module 8, is divided into intermediate-freuqncy signal IF1 and intermediate-freuqncy signal IF2.
(d5) intermediate-freuqncy signal IF1 enters AGC detection module 9, obtains DC voltage, produces after the amplification of operational amplifier A 11
Raw closed loop AGC voltage VAGC, the gain of the first intermediate frequency amplification module 5 and the second intermediate frequency amplification module 7 is controlled, realization pair
The automated closed-loop of equipment gain controls；The DC voltage that AGC detection module 9 obtains generates 0 after operational amplifier B12 amplification
The closed loop AGC telemetering voltage V of~5VAGCTM1Output, as system acquisition, the judgement foundation of losing lock；
(d6) intermediate-freuqncy signal IF2 enters envelope detection module 10, and detection goes out angular error signal and exports.
(2) extreme value following mode
(j1) ground sends operating mode switching command, and switching either-or switch A 14 to output gain controls voltage, cuts
Either-or switch B 15 is changed to output open loop AGC telemetering voltage VAGCTM2；It is disconnected to send poor branch low noise amplification module for ground simultaneously
Electricity instruction；
(j2) according to echo signal characteristic and level range, external input gain-controlled voltage amplifies mould to the first intermediate frequency
Block 5,7 gain of the second intermediate frequency amplification module are controlled, and the specific method is as follows:
By dynamic range progress stepping (as pressed 7dB stepping, being divided into 6 grades), each grade of correspondence is corresponding by input and signal Σ
Gain-controlled voltage.According to the characteristic that will track signal, gain-controlled voltage is injected, controls the first intermediate frequency amplification module 5
With the channel gain of the second intermediate frequency amplification module 7, guarantee the second intermediate frequency amplification module output within the scope of input and every grade of 7dB of signal
Intermediate-freuqncy signal IF power >=9dBm；
(j3) and signal Σ passes through and branch low noise amplification module 1, tracking modulation module 3, the first frequency mixing module 4, the
One intermediate frequency amplification module 5, the second frequency mixing module 6, the second intermediate frequency amplification module 7, output frequency 70MHz, power >=9dBm
Intermediate-freuqncy signal IF.
(j4) intermediate-freuqncy signal IF passes through function sub-module 8, is divided into two-way intermediate-freuqncy signal IF1 and intermediate-freuqncy signal IF2.
(j5) intermediate-freuqncy signal IF1 enters AGC detection module 9, obtains DC voltage, produces after the amplification of operational amplifier C 13
Raw open loop AGC telemetering voltage VAGCTM2, and export, 0~5V of voltage range, the judgement foundation as the rotation of extreme value following antenna；
(j6) intermediate-freuqncy signal IF2 enters envelope detection module 10, and output signal is not reprocessed.
The track receiver channel of two kinds of tracking systems of compatibility of the present invention is completed in two generation repeater satellite models
It develops, and has carried out verification experimental verification, single channel single-pulse track system can be compatible with by operating mode instruction switching switch
With extreme value following system；Under input signal dynamic range -100dBm~-60dBm operating condition, AGC needed for extreme value following is distant
It surveys resolution ratio and 0.6V/dB is increased to by 0.1V/dB.
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (10)
1. a kind of track receiver channel of two kinds of tracking systems of compatibility, it is characterised in that: including with branch low noise amplification mould
Block (1), poor branch low noise amplification module (2), tracking modulation module (3), frequency conversion and amplification module, function sub-module (8), AGC
Detection module (9), envelope detection module (10), operational amplifier A (11), operational amplifier B (12), operational amplifier C (13),
Either-or switch A (14) and either-or switch B (15)；
When either-or switch A (14) is switched to, output closed-loop AGC voltage, that either-or switch B (15) switches to output closed-loop AGC is distant
Survey voltage VAGCTM1When, channel enters single channel monopulse tracing mode, at this point, either-or switch A (14) exports AGC voltage VAGC
To frequency conversion and amplification module, gain closed-loop control is realized；Either-or switch B (15) output closed-loop AGC telemetering voltage VAGCTM1For
Capture, losing lock judgement；
When either-or switch A (14) switches to output gain control voltage, either-or switch B (15) switches to output open loop AGC
Telemetering voltage VAGCTM2When, channel enters extreme value following mode, at this point, either-or switch A (14) output gain control voltage extremely becomes
Frequency and amplification module realize gain opened loop control；Either-or switch B (15) exports open loop AGC telemetering voltage VAGCTM2For extreme value
Tracking judgement；
With branch low noise amplification module (1) to and signal Σ carry out low noise amplification export to tracking modulation module (3)；Difference branch
Road low noise amplification module (2) carries out low noise amplification to difference signal Δ and exports to tracking modulation module (3)；
Under single channel monopulse tracing mode, tracking modulation module (3) carries out phase shift modulated to received and signal and difference signal
Processing obtains amplitude modulation single channel monopulse signal, output to the first frequency mixing module (4)；Under extreme value following mode, tracking modulation mould
Received and signal is directly output to the first frequency mixing module (4) only as the channel with signal by block (3)；
The output signal progress frequency conversion and increasing of frequency conversion and amplification module using externally input local oscillation signal to track modulator (3)
Beneficial enhanced processing obtains intermediate-freuqncy signal IF, output to function sub-module (8)；
Intermediate-freuqncy signal IF constant power is divided into two-way by function sub-module (8), is all the way intermediate-freuqncy signal IF1, output to AGC detection module
(9)；Another way is intermediate-freuqncy signal IF2, output to envelope detection module (10)；
The power of AGC detection module (9) detection input intermediate-freuqncy signal IF1, obtain one it is directly proportional to input signal power straight
Galvanic electricity pressure, while output is amplified to operational amplifier A (11), operational amplifier B (12) and operational amplifier C (13)；
Envelope detection module (10) removes the carrier wave of intermediate-freuqncy signal IF2, extracts angular error signal envelope, amplified output angle
Error signal；
Operational amplifier A (11) carries out operation amplifier to AGC detection module (9) output DC voltage, to either-or switch A (14)
Output closed-loop AGC voltage VAGC；Operational amplifier B (12) carries out operation amplifier to AGC detection module (9) output DC voltage, to
Either-or switch B (15) output closed-loop AGC telemetering voltage VAGCTM1；Operational amplifier C (13) exports AGC detection module (9) straight
Galvanic electricity pressure carries out operation amplifier, exports open loop AGC telemetering voltage V to either-or switch B (15)AGCTM2。
2. a kind of track receiver channel of two kinds of tracking systems of compatibility according to claim 1, it is characterised in that: the change
Frequency and amplification module include the first frequency mixing module (4), the first intermediate frequency amplification module (5), the second frequency mixing module (6) and the second intermediate frequency
Amplification module (7)；
Under single channel monopulse tracing mode, either-or switch A (14) exports AGC voltage VAGCTo the first intermediate frequency amplification module (5)
With the second intermediate frequency amplification module (7), gain closed-loop control is realized；
Under extreme value following mode, either-or switch A (14) output gain controls voltage to the first intermediate frequency amplification module (5) and second
Intermediate frequency amplification module (7) realizes gain opened loop control；
First frequency mixing module (4) carries out letter using output signal of externally input first local oscillation signal to track modulator (3)
Number down coversion obtains the first intermediate-freuqncy signal, output to the first intermediate frequency amplification module (5)；
First intermediate frequency amplification module (5) exports after carrying out gain amplification to the first intermediate-freuqncy signal to the second frequency mixing module (6)；
Second frequency mixing module (6) is using externally input second local oscillation signal to the output signal of the first intermediate frequency amplification module (5)
Signal down coversion is carried out, the second intermediate-freuqncy signal, output to the second intermediate frequency amplification module (7) are obtained；
Second intermediate frequency amplification module (7) obtains intermediate-freuqncy signal IF after carrying out gain amplification to received signal, and output to function divides mould
Block (8).
3. a kind of track receiver channel of two kinds of tracking systems of compatibility according to claim 1, it is characterised in that: it is described with
Track modulation module (3) includes and channel phase shifter (31), poor channel modulator (32) and combiner (35)；
Under single channel monopulse tracing mode and channel phase shifter (31) is completed according to external command and 0-360 ° of range of signal
Interior phase shift；Poor channel modulator (32) reference signal f1 (t), f2 (t) control under, four phases are carried out to the difference signal of input
Modulation；Combiner (33) is added to form amplitude modulation single channel monopulse signal with signal, difference signal to above-mentioned phase shift with modulated；
Under extreme value following mode, poor channel modulator (32) does not work in tracking modulation module (3) and channel phase shifter (31) is set
In stationary phase, track modulator (3) is only as the channel with tributary signal.
4. a kind of track receiver channel of two kinds of tracking systems of compatibility according to claim 3, it is characterised in that: the difference
The timing processed that channel modulator (32) carries out four phase modulation to the difference signal of input is 0 ° -> 90 ° -> 270 ° -> 180 °.
5. a kind of track receiver channel of two kinds of tracking systems of compatibility according to claim 4, it is characterised in that: benchmark letter
Number f1 (t) and f2 (t) be the square-wave signal for the phase coherence that duty ratio is 50%, and the frequency of f1 (t) is 2 times of f2 (t).
6. a kind of track receiver channel of two kinds of tracking systems of compatibility according to claim 1, it is characterised in that: the difference
Signal delta is the difference signal of antenna feed output, is the vector sum of gun parallax signal delta A and trim signal delta E, Δ A and Δ E
It is orthogonal.
7. a kind of track receiver channel of two kinds of tracking systems of compatibility according to claim 6, it is characterised in that: it is described and
Signal Σ is that feed output and signal, Σ and Δ A same-phase, Δ E are vertical with Δ A.
8. a kind of track receiver channel of two kinds of tracking systems of compatibility according to claim 2, it is characterised in that: single-pass
Road single-pulse track mode realizes that process is as follows:
(d1) ground sends operating mode switching command, switching either-or switch A (14) to output closed-loop AGC voltage VAGC, switching
Either-or switch B (15) to output closed-loop AGC telemetering voltage VAGCTM1；
(d2) and signal Σ passes through and branch low noise amplification module (1), difference signal Δ are by poor branch low noise amplification module
(2) after, into tracking modulation module (3), tracking modulation module (3) exports amplitude modulation single-pulse single-channel signal after treatment；
(d3) amplitude modulation single-pulse single-channel signal is successively mixed through the first frequency mixing module (4), the first intermediate frequency amplification module (5), second
After frequency module (6) and the second intermediate frequency amplification module (7), intermediate-freuqncy signal IF is exported；
(d4) intermediate-freuqncy signal IF passes through function sub-module (8), is divided into intermediate-freuqncy signal IF1 and intermediate-freuqncy signal IF2；
(d5) intermediate-freuqncy signal IF1 enters AGC detection module (9), obtains DC voltage, produces after operational amplifier A (11) amplification
Raw closed loop AGC voltage VAGC, the gain of the first intermediate frequency amplification module (5) and the second intermediate frequency amplification module (7) is controlled, it is real
Now the automated closed-loop of equipment gain is controlled；The DC voltage that AGC detection module (9) obtains amplifies through operational amplifier B (12)
Afterwards, closed loop AGC telemetering voltage V is generatedAGCTM1Output, as system acquisition, the judgement foundation of losing lock；
(d6) intermediate-freuqncy signal IF2 enters envelope detection module 10, and detection goes out angular error signal and exports.
9. a kind of track receiver channel of two kinds of tracking systems of compatibility according to claim 2, it is characterised in that: extreme value
Tracing mode realizes that process is as follows:
(j1) ground sends operating mode switching command, and switching either-or switch A (14) to output gain controls voltage, switching two
Select a switch B (15) to output open loop AGC telemetering voltage VAGCTM2；Ground sends poor branch low noise amplification module power-off simultaneously
Instruction；
(j2) according to echo signal characteristic and level range, external input gain-controlled voltage, to the first intermediate frequency amplification module (5)
It is controlled with second intermediate frequency amplification module (7) gain；
(j3) successively pass through and branch low noise amplification module (1), tracking modulation module (3), the first frequency mixing module with signal Σ
(4), the first intermediate frequency amplification module (5), the second frequency mixing module (6) and the second intermediate frequency amplification module (7) export intermediate-freuqncy signal IF；
(j4) intermediate-freuqncy signal IF passes through function sub-module (8), is divided into two-way intermediate-freuqncy signal IF1 and intermediate-freuqncy signal IF2；
(j5) intermediate-freuqncy signal IF1 enters AGC detection module (9), obtains DC voltage, produces after operational amplifier C (13) amplification
Raw open loop AGC telemetering voltage VAGCTM2, and export, the judgement foundation as the rotation of extreme value following antenna；
(j6) intermediate-freuqncy signal IF2 enters envelope detection module (10), and output signal is not reprocessed.
10. a kind of track receiver channel of two kinds of tracking systems of compatibility according to claim 9, it is characterised in that: institute
It states in step (j2), the specific method is as follows for gain control:
Input and signal Σ are by dynamic range progress stepping, every grade of mdB, every grade of corresponding gain-controlled voltage of correspondence；According to general
The characteristic of echo signal is tracked, gain-controlled voltage is injected, the first intermediate frequency amplification module (5) is controlled and the second intermediate frequency amplifies mould
The channel gain of block (7) guarantees the intermediate-freuqncy signal IF function of the second intermediate frequency amplification module output within the scope of input and every grade of mdB of signal
Rate >=9dBm；M is 0 natural number.
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