阅读说明：本技术 一种s模式一体化询问机 (S-mode integrated interrogator ) 是由 余飞侠 水泉 徐鹏 杨天波 于 2020-11-25 设计创作，主要内容包括：本发明公开了一种S模式一体化询问机,用于解决了询问机的体积大、占用机柜空间多、接口复杂、信号种类繁多、调试难度大、成本高的问题；包括发射机、发射监控单元、接收机、数字中频单元和收发电源；所述发射机用于对已调制信号进行功率放大并产生射频询问信号；所述发射监控单元用于监控发射机工作状态和控制发射机的工作参数并对射频询问信号进行滤波输出上行询问信号；所述接收机用于将输入的三路1090MHz的Σ、Δ、Ω射频应答信号下变频为三路60MHz的中频信号,并对询问脉冲信号和测试脉冲信号进行调制,产生Σ激励信号、Ω激励信号、射频测试信号；本发明提高了设备集成度,简化了内部信号接口,降低了成本,方便了询问机的调式。(The invention discloses an S-mode integrated interrogator, which is used for solving the problems of large size, more occupied cabinet space, complex interfaces, various signal types, high debugging difficulty and high cost of the interrogator; the system comprises a transmitter, a transmitting monitoring unit, a receiver, a digital intermediate frequency unit and a transmitting and receiving power supply; the transmitter is used for power amplifying the modulated signal and generating a radio frequency inquiry signal; the transmitting monitoring unit is used for monitoring the working state of the transmitter, controlling the working parameters of the transmitter and filtering the radio frequency inquiry signal to output an uplink inquiry signal; the receiver is used for down-converting the input three 1090MHz sigma, delta and omega radio frequency response signals into three 60MHz intermediate frequency signals, modulating the interrogation pulse signal and the test pulse signal and generating a sigma excitation signal, an omega excitation signal and a radio frequency test signal; the invention improves the equipment integration level, simplifies the internal signal interface, reduces the cost and facilitates the mode adjustment of the interrogator.)

1. An S-mode integrated interrogator is characterized by comprising a transmitter, a transmitting monitoring unit, a receiver, a digital intermediate frequency unit and a transceiving power supply;

the transmitter is used for power amplifying the modulated signal and generating a radio frequency inquiry signal;

the transmitting monitoring unit is used for monitoring the working state of the transmitter, controlling the working parameters of the transmitter and filtering the radio frequency inquiry signal to output an uplink inquiry signal;

the receiver is used for down-converting the input three 1090MHz sigma, delta and omega radio frequency response signals into three 60MHz intermediate frequency signals, modulating the interrogation pulse signal and the test pulse signal and generating a sigma excitation signal, an omega excitation signal and a radio frequency test signal;

the digital intermediate frequency unit is used for carrying out digital down-conversion processing on three paths of 60MHz sigma, delta and omega intermediate frequency signals, generating digital video signals, outputting the digital video signals to the recorder through an optical fiber interface, receiving inquiry time sequence parameters sent by the recorder, generating inquiry pulse signals and test pulse signals to the receiver, and simultaneously receiving an inquiry machine control command and reporting the BIT information of the inquiry machine through a gigabit network port;

the receiving and transmitting power supply is used for converting input 220V alternating current into direct current power supplies required by the operation of the transmitter, the transmitting monitoring unit, the receiver, the digital intermediate frequency unit and the switching extension set.

2. The S-mode integrated interrogator of claim 1, wherein the transmitter comprises two transmit components, a sigma-delta transmit component and an omega transmit component, wherein the sigma-delta transmit component and the omega transmit component are configured to power amplify the modulated sigma-delta and omega excitation signals and generate a high power RF interrogation signal at 1030 MHz.

3. An S-mode integrated interrogator as claimed in claim 2, wherein both transmit modules adjust transmitter output power by means of digitally controlled attenuators and modulators.

4. The S-mode integrated interrogator according to claim 3, wherein the transmitting component is internally provided with a microwave power amplifying module, and the microwave power amplifying module adopts a solid-state power tube.

5. An S-mode integrated interrogator as claimed in claim 3, wherein said modulator generates the pulse voltage required for operation of the solid state power transistor by means of the current operating sequence and interrogation pulse sequence.

6. The S-mode integrated interrogator of claim 1, wherein a coupling filter is disposed inside the transmission monitoring unit, and is configured to perform RF filtering on a high-power RF interrogation signal of 1030MHz, and then send the high-power RF interrogation signal to an antenna feed system, and couple sigma and omega transmission signals and sigma and omega reflection signals, and detect transmission power and reflection power, the transmission monitoring unit further detects an operating state of the sigma and omega transmission components in real time, reports BIT information, and immediately turns off the transmitter when a serious fault such as over-temperature, over-reflection, over-standing wave ratio, over-duty ratio, over-width, and over-interrogation rate occurs.

7. The integrated interrogator of claim 1, wherein the transmitter-monitor unit receiver comprises a three-channel receiver front-end module, a frequency source module, an excitation source module and a receiver-monitor module;

the three-channel receiving front-end module is used for down-converting the three 1090MHz radio frequency response signals into three 60MHz intermediate frequency signals;

the frequency source module is used for generating clock signals required by the operation of the receiver and the digital intermediate frequency unit;

the excitation source module is used for receiving an interrogation pulse signal sent by the digital intermediate frequency unit, modulating the interrogation pulse signal to generate a sigma-omega excitation signal and sending the sigma-omega excitation signal to the transmitter for radio frequency power amplification;

the excitation source module is also used for receiving the test pulse signal sent by the digital intermediate frequency unit, modulating the test pulse signal to generate a radio frequency test signal, and carrying out quantitative measurement and analysis on important performance parameters of the receiver on line;

the receiving monitoring module is used for collecting the BIT information of the receiver and reporting and controlling the working parameters of the receiver.

8. The integrated interrogator of claim 1, wherein the digital intermediate frequency unit comprises a digital intermediate frequency module and a field monitoring module;

the digital intermediate frequency module carries out A/D sampling on three paths of 60MHz intermediate frequency signals, then carries out digital down-conversion processing to obtain Q digital response signals, IQ digital response signals are subjected to modulus finding and phase extraction processing, are converted into amplitude and phase angle of the response signals, carry out amplitude-phase correction, difference ratio angle and RSLS processing to generate digital video signals, then package the preprocessed digital video signals, OBA indication and real-time direction and time information into response frames and send the response frames to the recorder through an optical fiber interface, and meanwhile, the digital intermediate frequency module receives radar working timing sequence parameters from the recorder through the optical fiber interface, generates inquiry pulse signals and test pulse signals;

the field monitoring module receives radar working configuration parameters sent by the monitoring system through the gigabit network port and distributes the radar working configuration parameters to the transmitter and the receiver through the serial port;

the digital intermediate frequency unit also comprises a radar emission trigger signal test interface, a due north pulse signal test interface and an increment pulse signal test interface.

9. An S-mode integrated interrogator as claimed in claim 1, wherein said transceiver power supply has an input voltage of 220V AC; the power supply which is output to the transmitter by the transceiving power supply comprises a +50V DC switching power supply and +24V, -12V and +5V stabilized power supplies; the power supply which is output to the receiver by the transceiving power supply comprises a +5V switching power supply and +12V, -5V and +5V stabilized power supplies; the power supply output by the transceiving power supply to the digital intermediate frequency unit is a +5V switching power supply; the power output by the transceiving power supply to the switching extension comprises +28V and +5V switching power supplies.

10. The integrated interrogator of claim 1, wherein the digital intermediate frequency unit receives a control frame containing radar operation timing sequence parameters through an optical fiber interface, and sends a response frame containing response related information of digital video signals and orientation signals; the digital intermediate frequency unit receives an interrogator control command sent by the monitoring system through the gigabit network port and sends BIT information.

Technical Field

The invention relates to the technical field of air traffic control secondary surveillance radars, in particular to an S-mode integrated interrogator.

Background

At present, secondary radars of manufacturers at home and abroad generally mainly comprise an antenna, an antenna driving system, an interrogator, an accessor and a monitoring system. The interrogator mainly comprises a transmitter and a receiver. The transmitter of the secondary radar adopts a multi-stage drive amplification mode, the receiver adopts a mode of firstly down-converting into an intermediate frequency signal, then performing A/D sampling and logarithmic amplification to obtain a digital video signal, the recorder adopts a CPCI plug-in including a PFGA chip and a DSP chip for signal processing, the plug-in not only decodes the downlink digital video signal, but also generates an interrogation pulse signal according to the working parameters of the whole machine and is limited by the internal resources of the chip, when targets are increased and the system is overloaded, the phenomenon of system crash can occur, the recorder adopts an embedded computer or an industrial personal computer as a track processing computer, and the operating system adopts a special embedded operating system, such as a VxWorks system.

The current secondary radar-based interrogator mainly has the following problems: most of the existing interrogators are composed of 2 plug boxes, one plug box comprises a radio frequency part, namely a driving-level transmitter, a high-power transmitter, a receiver, a transmitting power module and a receiving power module, and the other plug box comprises a digital receiver and a power module and is used for generating digital video signals, interrogation pulse signals and the like.

Disclosure of Invention

The invention aims to provide an S-mode integrated interrogator, which aims to solve the problems of large size, more occupied cabinet space, complex interfaces, various signal types, high debugging difficulty and high cost of the interrogator; the integration level of the equipment is improved, the internal signal interface is simplified, the cost is reduced, and the mode adjustment of the interrogator is facilitated;

the purpose of the invention can be realized by the following technical scheme: an S-mode integrated interrogator comprises a transmitter, a transmitting monitoring unit, a receiver, a digital intermediate frequency unit and a transmitting and receiving power supply;

the transmitter is used for power amplifying the modulated signal and generating a radio frequency inquiry signal;

the transmitting monitoring unit is used for monitoring the working state of the transmitter, controlling the working parameters of the transmitter and filtering the radio frequency inquiry signal to output an uplink inquiry signal;

the receiver is used for down-converting the input three 1090MHz sigma, delta and omega radio frequency response signals into three 60MHz intermediate frequency signals, modulating the interrogation pulse signal and the test pulse signal and generating a sigma excitation signal, an omega excitation signal and a radio frequency test signal;

the digital intermediate frequency unit is used for carrying out digital down-conversion processing on three paths of 60MHz sigma, delta and omega intermediate frequency signals, generating digital video signals, outputting the digital video signals to the recorder through an optical fiber interface, receiving inquiry time sequence parameters sent by the recorder, generating inquiry pulse signals and test pulse signals to the receiver, and simultaneously receiving an inquiry machine control command and reporting the BIT information of the inquiry machine through a gigabit network port;

the receiving and transmitting power supply is used for converting input 220V alternating current into direct current power supplies required by the operation of the transmitter, the transmitting monitoring unit, the receiver, the digital intermediate frequency unit and the switching extension set.

Preferably, the transmitter comprises two transmit components, namely a sigma-delta transmit component and an omega transmit component, wherein the sigma-delta transmit component and the omega transmit component are respectively configured to power amplify the modulated sigma-delta and omega excitation signals and generate a high power radio frequency interrogation signal at 1030 MHz.

Preferably, both transmitting assemblies adjust the transmitter output power through a digitally controlled attenuator and a modulator.

Preferably, a microwave power amplification module is arranged in the transmitting assembly, and the microwave power amplification module adopts a solid-state power tube.

Preferably, the modulator generates the pulse voltage required by the solid-state power tube to work through the current working timing sequence and the interrogation pulse sequence.

Preferably, a coupling filter is arranged in the transmitting and monitoring unit, and is used for performing radio frequency filtering on a high-power radio frequency interrogation signal of 1030MHz and then sending the high-power radio frequency interrogation signal to the antenna feed system, and coupling a sigma-omega transmitting signal, a sigma-omega reflecting signal, and a transmitting power and a reflecting power for detection, the transmitting and monitoring unit also detects the working states of the sigma-omega transmitting components and omega transmitting components in real time and reports BIT information, and the transmitter is immediately turned off when serious faults of over-temperature, over-reflection, over standing wave ratio, over duty ratio, over-width and over-interrogation rate occur.

Preferably, the transmitting and monitoring unit receiver comprises a three-channel receiving front-end module, a frequency source module, an excitation source module and a receiving and monitoring module;

the three-channel receiving front-end module is used for down-converting the three 1090MHz radio frequency response signals into three 60MHz intermediate frequency signals;

the frequency source module is used for generating clock signals required by the operation of the receiver and the digital intermediate frequency unit;

the excitation source module is used for receiving an interrogation pulse signal sent by the digital intermediate frequency unit, modulating the interrogation pulse signal to generate a sigma-omega excitation signal and sending the sigma-omega excitation signal to the transmitter for radio frequency power amplification;

the excitation source module is also used for receiving the test pulse signal sent by the digital intermediate frequency unit, modulating the test pulse signal to generate a radio frequency test signal, and carrying out quantitative measurement and analysis on important performance parameters of the receiver on line;

the receiving monitoring module is used for collecting the BIT information of the receiving component and reporting and controlling the working parameters of the receiver.

Preferably, the digital intermediate frequency unit comprises a digital intermediate frequency module and a field monitoring module;

the digital intermediate frequency module carries out A/D sampling on three paths of 60MHz intermediate frequency signals, then carries out digital down-conversion processing to obtain Q digital response signals, IQ digital response signals are subjected to modulus finding and phase extraction processing, are converted into amplitude and phase angle of the response signals, carry out amplitude-phase correction, difference ratio angle and RSLS processing to generate digital video signals, then package the preprocessed digital video signals, OBA indication and real-time direction and time information into response frames and send the response frames to the recorder through an optical fiber interface, and meanwhile, the digital intermediate frequency module receives radar working timing sequence parameters from the recorder through the optical fiber interface, generates inquiry pulse signals and test pulse signals;

the field monitoring module receives radar working configuration parameters sent by the monitoring system through the gigabit network port and distributes the radar working configuration parameters to the transmitter and the receiver through the serial port;

the digital intermediate frequency unit also comprises a radar emission trigger signal test interface, a due north pulse signal test interface and an increment pulse signal test interface.

Preferably, the input voltage of the transceiving power supply is 220V AC; the power supply which is output to the transmitter by the transceiving power supply comprises a +50V DC switching power supply and +24V, -12V and +5V stabilized power supplies; the power supply which is output to the receiver by the transceiving power supply comprises a +5V switching power supply and +12V, -5V and +5V stabilized power supplies; the power supply output by the transceiving power supply to the digital intermediate frequency unit is a +5V switching power supply; the power output by the transceiving power supply to the switching extension comprises +28V and +5V switching power supplies.

Preferably, the digital intermediate frequency unit receives a control frame containing radar working timing sequence parameters through an optical fiber interface, and sends a response frame containing response related information of digital video signals and azimuth signals; the digital intermediate frequency unit receives an interrogator control command sent by the monitoring system through the gigabit network port and sends BIT information.

Compared with the prior art, the invention has the beneficial effects that:

1. the device adopts all-solid-state, digital and modular design, and has high integration level, small volume and light weight;

2. the all-solid-state high-duty-ratio transmitter is adopted, the requirements of ICAO all-S mode inquiry are met, and the all-S mode operation capability is realized;

3. a high dynamic intermediate frequency sampling digital receiver is adopted to realize digital amplitude and phase correction and digital video processing;

4. the high-degree modular design, the transmitter, the transmitting monitor, the receiver, the digital intermediate frequency and the receiving and transmitting power supply are all independent replaceable units, so that the online maintenance and replacement are convenient;

5. the interrogator sends digital video signals through the high-speed optical fiber interface, so that the data transmission rate is improved, and the anti-interference capability of data transmission is improved;

6. the inquiry machine interacts with external equipment through a gigabit network interface, so that the number of interfaces of the inquiry machine is reduced, the number of cables outside the whole machine is reduced, and the debugging difficulty is reduced.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic block diagram of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.

Referring to fig. 1, an S-mode integrated interrogator includes a transmitter, a transmitting monitoring unit, a receiver, a digital intermediate frequency unit, and a transceiver power supply;

the transmitter comprises 2 identical transmitting components, namely a sigma-delta transmitting component and an omega transmitting component.

The transmitting assembly firstly performs primary amplification on a received excitation signal with the amplitude of about 10dBm, drives a 200W low-power solid-state power amplifier through a numerical control attenuator, and passes through a 1: the 4 power dividers are divided into 4 paths of low-power signals to drive 4 paths of parallel 1000W high-power solid-state power amplifiers, each path of solid-state power amplifier works under the control of a modulator, and finally 4 paths of high-power output signals are synthesized into 1 path of high-power radio-frequency signals through a 4:1 power synthesizer to be output; and adjusting the final output power level under the combined action of the digital controlled attenuator and the modulator to realize the multi-step change of the output power of the transmitter.

The transmitting monitoring unit comprises a 2-path high-power coupling filter and a transmitting monitoring unit module, the 1-path high-power coupling filter filters sigma-power radio-frequency signals of the sigma-delta transmitting component, sigma-delta transmitting power signals and sigma-delta reflected power signals with smaller amplitudes are coupled, and the transmitting monitoring unit module is used for detecting the sigma-delta transmitting power, the sigma-delta reflected power and the sigma-delta channel standing wave; the 1-path high-power coupling filter filters the omega power radio frequency signals of the omega transmitting component, couples out omega transmitting power signals and omega reflecting power signals with small amplitude, and detects omega transmitting power, omega reflecting power and omega channel standing waves through the transmitting monitoring unit module.

The receiver comprises a three-channel receiving front-end module, a frequency source module, an excitation source module and a receiving monitoring module.

Three identical receiving channels are arranged in the three-channel receiving front-end module, three paths of 1090MHz sigma, delta and omega radio frequency response signals are mixed with a 1030MHz local oscillation signal generated by the frequency source module, and three paths of 60MHz intermediate frequency signals are generated; before the field discharge, a PIN switch is not used for protection, but a high-power cavity filter is used for filtering the transmission signal of a transmitter, the image frequency and the interference of other radars, so that the field discharge is protected; the test signal access switch is controlled by receiving the time sequence signal, and important performance parameters such as three-channel amplitude consistency of the receiver, sensitivity of the receiver and the like are measured on line by coupling the 1090MHz radio frequency test signal.

The frequency source module selects a 103MHz constant-temperature crystal oscillator as a reference source of the whole machine, and a 103MHz clock signal generated by the frequency source module is sent to a high-frequency link and a low-frequency link after power division to generate a high-frequency local oscillator and a low-frequency clock; the high frequency local oscillator is used for generating a stable local oscillator signal with low phase noise by a direct synthesis method; the low-frequency clock is generated by a phase-locked method, and the spurious is small; finally, a filter with very good frequency characteristics is inserted to generate a highly stable clock signal.

The excitation source module is used for generating a sigma-shaped excitation signal, an omega-shaped excitation signal and a radio frequency test signal; the 1030MHz carrier frequency sent by a frequency source is firstly modulated by sigma-phase reversal pulse control 2DPSK in an inquiry pulse signal, then is subjected to amplitude modulation by sigma-frame pulse in the inquiry pulse signal, and the modulated signal is subjected to excitation power amplification to generate a 1030MHz sigma-shaped excitation signal of about 10dBm and send the signal to a sigma-shaped transmitting component; the 1030MHz carrier frequency sent by a frequency source is firstly subjected to omega frame pulse amplitude modulation in an interrogation pulse signal, and the modulated signal is subjected to excitation power amplification to generate an omega excitation signal of 1030MHz of about 10dBm and send the omega excitation signal to an omega emission component; 1090MHz radio frequency test signals sent by a frequency source are subjected to 2DPSK phase modulation, then pulse amplitude modulation is carried out through test pulse signals, and 1090MHz radio frequency test signals of about 10dBm are generated and sent to a three-channel receiving front end.

The receiving monitoring module is used for realizing the functions of collecting BIT information and important performance parameter on-line quantitative measurement of the receiver and controlling the working parameters of the receiver; the BIT information of the receiver comprises working states of modules such as a front end of a three-channel receiver, a crystal oscillator, a frequency source and an excitation source, and whether output of a sigma-delta excitation signal, an omega excitation signal, a sigma-delta intermediate frequency signal, a delta intermediate frequency signal and an omega intermediate frequency signal is normal or not; the online measurement parameters comprise gain, sensitivity and the like of a radar receiving channel; in addition, in order to eliminate the random phase and gain difference of the receiving channel during operation, the receiving component also provides a reference signal for correcting the receiving channel, and the test signals fed into the three channels are strictly consistent in phase and amplitude.

The digital intermediate frequency unit comprises a digital intermediate frequency module and an on-site monitoring module, and adopts a digital down-conversion mode of firstly directly carrying out high-speed A/D sampling on an intermediate frequency analog signal of 60MHz and then carrying out digital phase discrimination to realize I/Q digital separation, thereby ensuring the accuracy of an I/Q channel in the aspects of amplitude consistency and phase orthogonality and improving the signal processing accuracy and stability of a receiver.

The digital intermediate frequency module respectively carries out A/D sampling on three paths of 60MHz sigma, delta and omega intermediate frequency signals by adopting a 200MHz clock, then carries out digital down-conversion processing such as quadrature demodulation, baseband filtering, extraction and the like to obtain IQ data, carries out amplitude-phase correction and amplitude extraction on the IQ data of a sigma channel and a delta channel to obtain LOG sigma and LOG delta signals, directly carries out amplitude extraction on the IQ data of the omega channel to obtain LOG omega signals, carries out sum-difference ratio angle processing on the IQ data of the sigma channel and the delta channel after amplitude-phase correction to obtain f (delta/sigma), carries out RSLS processing on the LOG sigma, LOG delta and LOG omega signals to obtain QRS SLS signals, and packages the preprocessed LOG sigma, LOG delta, LOG omega, omega f (delta/sigma), SLS signals and information such as real-time direction, time and the like into response frames which are sent to the recorder through an optical fiber interface; the working clock of the optical fiber interface module is 125MHz, and the optical fiber speed is 2.5 Gb/s.

The digital intermediate frequency module receives a control frame from the recorder through the optical fiber interface, an inquiry period table and an inquiry waveform table are established in an RAM inside the FPGA, data in the table are written and updated by the control frame, inquiry trigger pulse signals are generated according to inquiry trigger parameters in the inquiry period table, and sigma and omega inquiry pulse signals, test pulse signals, emission trigger pulse signals and receiving trigger signals are output according to the parameters in the inquiry waveform table.

The field monitoring module receives radar working configuration parameters sent by the monitoring system through a gigabit network port and distributes the radar working configuration parameters to the transmitter, the receiver and the digital intermediate frequency module through serial ports, so that the control of the transmitter and the receiver is realized, and the control comprises azimuth encoder switching, remote switch transmitter switching, working channel switching, working parameter setting and the like; and collecting the real-time BIT information of the sigma-delta transmitting component, the omega transmitting component, the transmitting monitoring unit, the receiver, the digital intermediate frequency and the transmitting and receiving power supply, and then forwarding the BIT data to a monitoring system through the gigabit network port to realize the monitoring of the working state of the interrogator.

The field monitoring module receives differential azimuth north pulse (ARP), azimuth increment 1 pulse (ACP) signals and azimuth increment 2 pulse (ACP) signals output by the two-way photoelectric azimuth encoder, and respectively carries out deburring, filtering and other processing on the signals, judges whether the north pulse, the increment 1 pulse and the increment 2 pulse signals of the two-way photoelectric azimuth encoder are normal or not and reports the signals to the monitoring system, and meanwhile, the filtered azimuth signals of the main photoelectric azimuth encoder are packaged into response frames through the digital intermediate frequency module and are sent to the recorder through the optical fiber interface.

The invention relates to generation of an uplink sigma-omega high-power radio frequency interrogation signal of 1030MHz of an S-mode integrated interrogator, which comprises the following specific steps of:

s11, the digital intermediate frequency module in the digital intermediate frequency updates the inquiry time sequence parameter according to the received control frame, generates an inquiry pulse signal and sends the inquiry pulse signal to the receiver;

s12, PAM and 2DPSK modulation are carried out on the interrogation pulse signal by an excitation original module in the receiver by adopting carrier frequency of 1030MHz to generate a sigma-shaped excitation signal of 1030MHz and an omega-shaped excitation signal, and the sigma-shaped excitation signal and the omega-shaped excitation signal are respectively sent to a sigma-shaped emission component and an omega-shaped emission component;

s13, the sigma-delta transmitting component and the omega transmitting component respectively amplify and synthesize power of the sigma-delta excitation signal and the omega excitation signal step by step to obtain a sigma-delta radio frequency power signal and an omega radio frequency power signal;

and S14, the transmitting monitoring unit respectively performs coupling filtering on the sigma radio frequency power signal and the omega radio frequency power signal and outputs a 1030MHz sigma high-power radio frequency query signal and an omega high-power radio frequency query signal.

The invention relates to a processing process of three paths of 1090MHz sigma, delta and omega radio frequency response signals of an S-mode integrated interrogator, which comprises the following specific steps of:

s21, a three-channel receiving front-end module in the receiver mixes the received three paths of 1090MHz sigma, delta and omega radio frequency response signals with a 1030MHz local oscillation signal of a frequency source module to generate three paths of 60MHz sigma, delta and omega intermediate frequency signals;

s22, the digital intermediate frequency module in the digital intermediate frequency carries out high-speed A/D sampling and digital down-conversion processing on three paths of 60MHz sigma, delta and omega intermediate frequency signals to obtain IQ data, carries out amplitude-phase correction, amplitude extraction, sum-difference ratio angle and RSLS processing on the IQ data to obtain preprocessed sigma, delta and omega digital video signals, OBA indication and QRSLS signals, and packages the data and information such as real-time direction, time and the like into a response frame which is sent to the recorder through the optical fiber interface.

When the invention is used, the interrogator receives a control frame containing radar working time sequence parameters and an interrogator control command received through a gigabit network port through the optical fiber interface, and generates an uplink sigma-omega high-power radio frequency interrogation signal of 1030 MHz; receiving three paths of 1090MHz sigma, delta and omega radio frequency response signals, performing down-conversion to obtain digital video signals, and outputting response frames containing the digital video signals and azimuth information through a high-speed optical fiber interface; and sending the BIT information of the interrogator through the gigabit network port.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.