Parameterized radar and parameterized radar time sequence generation mode

Abstract

The invention relates to the technical field of radar systems, in particular to a parameterized radar and a parameterized radar time sequence generation mode. A time sequence control parameter table is established according to radar time sequence requirements, parameters in the table are directly input in a terminal monitoring interface, the time sequence control parameter table is sent to parameterized time sequence generation software through an optical fiber, and a time sequence control parameter analysis module obtains time sequence control parameters of a next PRI by analyzing the time sequence control parameter table. And the signal is respectively output to the normal working mode generation module and the emission correction working mode generation module. According to the invention, corresponding time sequence control parameter tables are designed for different radar devices, so that different time sequence signal combinations can be generated, the working time sequence requirements of various radar devices in different environments are met, and the flexibility, universality and expandability are higher than those of traditional radar devices.

Description

Technical Field

[0001] The present invention relates to the technical field of radar systems, and in particular to a parameterized radar and a parameterized radar timing generation method. Background Art

[0002] With the development of electronic warfare and information warfare, radar, as a key device for obtaining battlefield intelligence, has a direct impact on the outcome of wars through its performance. In order to meet multi-functional requirements (for example, it can search, track, and self-check the radar system itself) and adapt to different target environments, modern radars often require a radar system to use multiple signal forms and automatically and flexibly select working timing according to different situations. Radar timing is the core of ensuring the normal operation of the radar system, which involves multiple links such as signal generation, transmission, reception, and processing. Especially on the battlefield where the situation changes rapidly, how to accurately control the radar timing and quickly respond to terminal instructions has become a hot topic in radar technology research. Existing radar systems usually set several timing combinations for solidification, and then select the corresponding timing combination according to the current working requirements to generate timing signals. Although this method is simple and convenient, when the solidified timing combinations do not meet the requirements, it is necessary to modify the timing generation software to expand the timing combination. The limited number of timing signal combinations leads to poor flexibility in actual use, and the existing timing generation software also has problems such as complex external interfaces and low portability. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a parametric radar and a parametric radar timing generation method. In view of the current situation that the use environment of radar equipment is changeable, the present invention only needs to design corresponding timing control parameter tables for different radar equipment to generate different timing signal combinations to meet the working timing requirements of various radar equipment in different environments.

[0004] The novel technical solution of the present invention is: a parameterized radar timing generation method, characterized in that: it includes the following steps:

[0005] Step b1, after detecting the data input, the timing control parameter parsing module first determines whether the data frame header is consistent with the fixed frame header of the timing control parameter table. If so, it indicates that the current timing control parameter table format is correct, and then the subsequent steps are executed; if not, then no execution is performed;

[0006] Step b2, after receiving a valid timing control parameter table, pull up the data valid enable, and pull down the data valid enable after detecting the data end bit, and at the same time pull up the data end flag and continue for one clock cycle;

[0007] Step b3, reading the timing control parameter in the last clock cycle of each synchronization pulse to generate the timing signal of the next synchronization pulse;

[0008] Step b4, determining the radar working mode according to the timing control parameters of the current synchronization pulse sent by the timing control parameter analysis module, if the radar working mode is determined to be the normal working mode or the receiving correction working mode, jump to step b5; if the radar working mode is determined to be the transmitting correction working mode, jump to step b8;

[0009] Step b5, the first generated timing signal is a synchronization pulse signal, a pri counter is generated, the default zero time is the starting time of the synchronization pulse signal, and the synchronization pulse signal is pulled high for one clock cycle;

[0010] Step b6, based on the pri counter, generate a transmission waveform trigger and a transmission power modulation signal according to the signal starting position and signal length;

[0011] Step b7, generate pulse count according to the number of rising edges of pri, and output the radar timing signal to the wave control subsystem and correction plug-in through optical fiber;

[0012] Step b8: Determine the radar operating mode as the transmission correction operating mode according to the timing control parameters of the current synchronization pulse sent by the timing control parameter analysis module.

[0013] According to a parameterized radar timing generation method as described above, it is characterized in that: in step b2, during the period when the data valid enable is pulled high, the parameter address is assigned to the address register, and the parameter content is stored in different data registers according to different values ​​in the address register.

[0014] According to a parameterized radar timing generation method as described above, it is characterized in that: each synchronization pulse under the transmission correction working timing contains n transmission waveforms, the first timing signal generated is a synchronization pulse signal, a pri counter, a transmission waveform trigger counter and a transmission waveform trigger quantity counter are generated, and the first transmission waveform trigger signal is pulled high at the moment of zero 100us after the rising edge of the synchronization pulse signal, and when the transmission waveform trigger counter counts to a single transmission waveform trigger width * 8, the first transmission waveform trigger is effectively ended, and the first transmission waveform trigger signal is pulled low, and when the transmission waveform trigger counter counts to an interval between two transmission waveform triggers * 8, the first transmission waveform trigger ends, and the second transmission waveform trigger signal is pulled high, and subsequent transmission waveform trigger signals are generated by analogy; each time a rising edge of the transmission waveform trigger signal is detected, the transmission waveform trigger number counter is increased by one until the transmission waveform trigger number counter accumulates to n, and no transmission waveform trigger is generated in the current synchronization pulse; n is the number of radar array AD channels).

[0015] The invention also discloses a parameterized radar, the working process of which is as follows: step a, setting of a timing parameter control table; step b, step of generating the timing of the parameterized radar; step c, the radar front end generates a waveform output according to the timing signal; the characteristic is that: step b adopts any one of the parameterized radar timing generation methods as described above to generate the timing; the radar terminal monitoring subsystem establishes a timing control parameter table according to the radar timing requirement, the timing control parameter table is sent to the parameterized radar timing generation software through an optical fiber, the parameterized radar timing generation software comprises a timing control parameter parsing module, a normal working timing generation module, a signal generating module and a transmission correction working timing generation module; the timing control parameter parsing module obtains the timing control parameter of the next PRI by parsing the timing control parameter table, and outputs the timing control parameter to the normal working mode generating module and the transmission correction working mode generating module respectively; the normal working mode generating module generates the timing signal in the normal working mode and the timing signal in the receiving correction mode according to the timing control parameter; the transmission correction working mode generating module generates the timing signal in the transmission correction working mode according to the timing control parameter; finally, the radar working timing of the next PRI is judged according to the timing control parameter, and the radar timing signal is output when the current PRI ends.

[0016] According to the parameterized radar as described above, it is characterized in that step c comprises the following steps:

[0017] Step c1, the radar wave control subsystem receives the timing signal and the wave control code sent by the signal processing subsystem through the optical fiber, and uploads it to the TR component through the optical fiber;

[0018] Step c2, the TR component converts the serial data stream containing the timing signal and the wave control code into a parallel digital code of the basic clock rate. The parallel digital code is adjusted through the FPGA base module in the TR component to perform phase and amplitude control, amplitude and phase balance, injection of low-pass jitter signal, and conversion from the baseband frequency to the final IF. The final IF is multiplexed into 8 independent channel signals, each channel is a sub-array of a group of 8 units.

[0019] According to a parameterized radar as described above, it is characterized in that step a includes the following process:

[0020] Step a1, the radar terminal monitoring subsystem inputs the timing control parameter table, wherein the working mode selects machine scanning or phase scanning to control the radar antenna scanning mode; the timing output selects the conventional working timing, the transmission correction timing or the reception correction timing;

[0021] Step a2, input pri length to control pulse repetition period;

[0022] Step a3, inputting the transmission pulse width and the transmission pulse position to generate a transmission pulse signal;

[0023] Step a4, inputting power modulation width and power modulation position to generate a power modulation signal;

[0024] Step a5: In dual-frequency working mode, input the timing control parameters of the second transmitting waveform in the same pri.

[0025] According to the parameterized radar as described above, it is characterized in that: the wave control code in step c1 includes a frequency code, a waveform code, a DBF coefficient and a delay compensation code. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the workflow diagram of parameterized radar.

[0027] Figure 2 Generate software workflow diagram for parameterized radar timing.

[0028] Figure 3 This is a schematic diagram of synchronous pulse alignment using a synchronous clock.

[0029] Figure 4 It is the timing control interface for the normal working mode of the terminal monitoring subsystem.

[0030] Figure 5 It is the terminal monitoring subsystem receiving correction working mode and receiving correction working mode timing control interface.

[0031] Figure 6 Generate software simulation waveforms for parameterized radar timing. Specific implementation plan

[0032] The specific implementation methods of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0033] The invention is based on an FPGA hardware platform and adopts the VIRTEX-7 series chip of XILINX Company, the model of which is XC7VX690TFFG1927-2. A radar baseband module provides a 125M external system clock and a 25M external synchronous clock, which are input through a backplane. The external system clock is converted into a stable system clock of the board through a clock distributor ADCLK854BCPZ and sent to the FPGA chip together with the external synchronous clock, so as to ensure that various radar systems can operate synchronously and improve the overall performance and reliability of the radar equipment.

[0034] Figure 1The figure shows a working flow chart of a parametric radar. The radar terminal monitoring subsystem establishes a timing control parameter table according to the radar timing requirements, directly inputs the parameters in the table on the terminal monitoring interface, and the timing control parameter table is sent to the parametric radar timing generation software through optical fiber. The parametric radar timing generation software includes a timing control parameter parsing module, a normal working timing generation module, a signal generation module, and a transmission correction working timing generation module. The timing control parameter parsing module obtains the timing control parameters of the next PRI by parsing the timing control parameter table, and outputs them to the normal working mode generation module and the transmission correction working mode generation module respectively. The normal working mode generation module generates the timing signal in the normal working mode and the timing signal in the receiving correction mode according to the timing control parameters. The transmission correction working mode generation module generates the timing signal in the transmission correction working mode according to the timing control parameters. Finally, the radar working timing of the next PRI is determined according to the timing control parameters, and the radar timing signal is output when the current PRI ends.

[0035] The radar timing signal output by the parameterized radar timing generation software enters the radar wave control subsystem. The parameterized radar timing generation software and the radar wave control subsystem transmit the timing signal through optical fiber. The wave control subsystem then sends the timing signal, wave control code and other system control instructions to the TR component of the radar array to generate the modulated transmission waveform signal required by the system.

[0036] The working process of a parameterized radar disclosed in the present invention is:

[0037] Step a, setting of the timing parameter control table. The user can modify any timing control parameter in the timing control parameter table at any time, and the parameterized radar timing generation software can generate timing signals in real time according to the updated timing control parameter table, meeting the different working timings required by different radar equipment in different situations, greatly improving the operational flexibility and software versatility. The specific process includes the following:

[0038] Step a1, the radar terminal monitoring subsystem inputs the timing control parameter table, wherein the working mode selects machine scanning or phase scanning to control the radar antenna scanning mode; the timing output selects the conventional working timing, the transmission correction timing or the reception correction timing;

[0039] Step a2, input pri length to control the pulse repetition period, in microseconds. The pulse repetition period determines the number of pulses emitted per second by the radar system, and has an important impact on the detection range, range resolution and anti-interference ability of the radar system;

[0040] Step a3, input the transmit pulse width and transmit pulse position to generate a transmit pulse signal. The transmit pulse controls the opening and closing of the radar transmitter waveform generator. When the transmit pulse ends, the receiver starts working, so that the transmission and reception of the radar array do not interfere with each other. The minimum interval between the start position of the transmit pulse and the start position of pri is 100 microseconds. The purpose of this setting is to reserve enough time for the wave control subsystem and the array TR component to perform synchronization processing;

[0041] Step a4, input power modulation width and power modulation position to generate power modulation signal, power modulation controls the power on and off of the transmitter amplifier, the power modulation start position is fixed 1 microsecond after the start position of the transmission pulse, and the power modulation width is fixed 2 microseconds longer than the transmission pulse width, this setting is to synchronize the amplifier power switch with the waveform generator, so that the transmission waveform can be fully amplified;

[0042] Step a5: In dual-frequency working mode, it is necessary to input the timing control parameters of the second transmitting waveform in the same pri;

[0043] Step b, parameterize the workflow of radar timing generation software, such as Figure 2 As shown, the specific steps are as follows:

[0044] Step b1, after detecting data input, the timing control parameter parsing module first determines whether the data frame header is consistent with the fixed frame header of the timing control parameter table. If so, it indicates that the current timing control parameter table format is correct, and the subsequent steps are executed; if not, they are not executed.

[0045] Step b2, after receiving a valid timing control parameter table, immediately pull up the data valid enable, and pull down the data valid enable after detecting the data end bit, and at the same time pull up the data end flag and keep it for one clock cycle. During the period when the data valid enable is pulled high, the high 16 bits of the data, i.e. the parameter address, are assigned to the address register, and according to the different values ​​in the address register, the low 16 bits of the data, i.e. the parameter content, are stored in different data registers respectively. When the data end flag is pulled high, the values ​​in all data registers are stored in the FIFO. At this time, the FIFO stores the complete timing control parameters currently received. At the same time, the FIFO also plays a role in crossing the clock domain, converting the timing control parameters from the 250M fiber clock to the 125M board clock. The advantage of using address and data storage here is that the timing control parameter table does not need to be fully entered every time, and only the parameters that need to be modified need to be entered, saving bandwidth resources when the timing control parameter table is transmitted;

[0046] Step b3, in the last clock cycle of each synchronization pulse, that is, when the synchronization pulse end flag is pulled high, the timing control parameters are read from the FIFO, that is, the timing control parameter parsing module data is read out and used to generate the timing signal of the next synchronization pulse. The advantage of taking the last clock cycle of the synchronization pulse here is that it can avoid the situation where the timing control parameters are received at the end of the current pulse, and the software has already read the last timing control parameters to generate the next synchronization pulse timing signal;

[0047] Step b4, determine the radar working mode according to the timing control parameters of the current synchronization pulse sent by the timing control parameter analysis module. If the radar working mode is determined to be the normal working mode or the receiving correction working mode, jump to step b5; if the radar working mode is determined to be the transmitting correction working mode, jump to step b8. The advantage of determining the radar working mode here is that the normal working mode and the receiving correction working mode with similar timing generation methods can be processed in one module, and the transmitting correction working mode can be processed in another module, making the software logic clearer;

[0048] Step b5, the first timing signal generated is the synchronization pulse signal, and a pri counter is generated. The default zero time is the starting time of the synchronization pulse signal, and the synchronization pulse signal is pulled high for one clock cycle. Since the units of all signal lengths in the synchronization pulse control parameter table are microseconds, the working clock of the timing generation module is 125M, so when the pri counter counts to the synchronization pulse length * 8, the current synchronization pulse ends, and the next synchronization pulse signal is pulled high.

[0049] Step b6, using the pri counter as a reference, generate other timing signals such as transmission waveform triggering, transmission power modulation, etc. according to the signal starting position and signal length. The advantage of using the pri counter as a reference to generate other timing signals here is that each timing signal is only related to the pri, and the timing signals are not related to each other. As long as the pri counter is generated stably, the other timing signals can be guaranteed to be stable, which greatly improves the software stability and the reliability and independence of the timing signals.

[0050] Step b7, generate pulse count according to the number of rising edges of pri, output the radar timing signal to the wave control subsystem and correction plug-in through optical fiber, and then execute step c.

[0051] Step b8, according to the timing control parameters of the current synchronization pulse sent by the timing control parameter analysis module, the radar operating mode is determined to be the emission correction operating mode, the emission correction operating sequence is different from the normal operating sequence and the receiving correction operating sequence, and each synchronization pulse under the emission correction operating sequence contains n emission waveforms (n is the number of radar array AD channels). The first generated timing signal is a synchronization pulse signal, which generates a pri counter, a transmission waveform trigger counter and a transmission waveform trigger quantity counter, and the first transmission waveform trigger signal is pulled up at zero at 100us after the rising edge of the synchronization pulse signal. When the transmission waveform trigger counter counts to a single transmission waveform trigger width * 8, the first transmission waveform trigger effectively ends, and the first transmission waveform trigger signal is pulled down. When the transmission waveform trigger counter counts to the interval between two transmission waveform triggers * 8, the first transmission waveform trigger ends, and the second transmission waveform trigger signal is pulled up, and subsequent transmission waveform trigger signals are generated by analogy. Each time the rising edge of the transmission waveform trigger signal is detected, the transmission waveform trigger number counter is increased by one, until the transmission waveform trigger number counter is accumulated to n (n is the number of radar array AD channels), and the transmission waveform trigger is no longer generated in the current synchronization pulse. When the pri counter counts to the synchronization pulse length * 8, the current synchronization pulse ends. In the same way, generate the transmission power modulation signal under the transmission correction working sequence, and then execute step c.

[0052] Step c, the radar front end generates a waveform output according to the timing signal;

[0053] Step c1, the radar wave control subsystem receives the timing signal and the wave control code (including frequency code, waveform code, DBF coefficient and delay compensation code, etc.) sent by the signal processing subsystem through the optical fiber, and then uploads it to the TR component through the optical fiber;

[0054] Step c2, the TR component converts the serial data stream containing the timing signal and the wave control code into a parallel digital code with a basic clock rate of 20Mhz. The parallel digital code is adjusted by the FPGA base module in the TR component, which performs phase and amplitude control, amplitude and phase balance, injection of low-pass jitter signal, and conversion from the baseband frequency to the final IF. The final IF is multiplexed into 8 independent channel signals, each channel is a sub-array of 8 units. Each channel inputs a DAC chip for up-conversion to convert the digital signal into the transmission waveform of the analog signal.

[0055] Figure 3The figure shows the schematic diagram of using the synchronous clock for synchronous pulse alignment. The synchronous pulse signal output by the parameterized radar timing generation software is multiplexed in the optical fiber data for transmission. After the synchronous pulse signal is multiplexed, photoelectrically converted, optically transmitted, electro-optically converted, and optically divided, there will be 1 to 2 optical fiber clock deviations between multiple receiving ends. The optical fiber clock of this design is 250MHz, and the synchronous pulse deviation is within 8ns. In order to eliminate this deviation, the synchronous pulse signals received by the receiving end are latched with the synchronous clock (25MHz) to ensure the alignment of the synchronous pulses.

[0056] During project implementation, after measuring the transmission delay T of the synchronization pulse signal, the output delay control (precision control degree 4ns) is performed at the sending end to ensure that the received synchronization pulse signal arrives near the falling edge of the synchronization clock, and the synchronization pulse signal is sampled and latched at the rising edge of the synchronization clock.

[0057] Figure 4 , Figure 5 The timing control interface of the normal working mode of the terminal monitoring subsystem, the timing control interface of the receiving correction working mode, and the timing control interface of the transmitting correction working mode are respectively displayed. After the radar equipment is powered on, if the user does not update the timing control parameter table, the parameterized radar timing generation software will use the default timing control parameters to generate the radar timing signal, so that the radar is in normal working mode. If the user needs to change the timing control parameter table, only need to enter the timing control parameters such as PRI length, transmission pulse width, transmission pulse position in the radar system control interface of the terminal monitoring, and each timing signal under each PRI can be accurately controlled in real time. If the user needs to switch the radar working mode, only need to switch in the working mode selection interface of the system control function. The graphical interface allows the user to not need to understand the communication protocol between the parameterized radar timing generation software and the subsystem, only need to modify the timing control parameters according to the established timing control parameter table, which greatly improves the convenience of operation and efficiency of use.

[0058] Figure 6 This is the timing signal waveform diagram generated by the parameterized radar timing generation software in the modelsim simulation software, showing the process of the parameterized radar timing generation software switching from normal working timing to receiving correction working timing, then switching to transmitting correction working timing, and finally switching back to normal working timing after initialization. Due to the long length of the actual synchronization pulse and the limitation of the number of sampling points of the Vivado software, the Vivado hardware debugging interface can only sample and observe the local part of the timing signal, which is not shown in this article.

Claims

1. A parameterized radar timing generation method, characterized in that: The following steps are included: Step b1, after detecting the data input, the timing control parameter parsing module first determines whether the data frame header is consistent with the fixed frame header of the timing control parameter table. If so, it indicates that the current timing control parameter table format is correct, and then the subsequent steps are executed; if not, then no execution is performed; Step b2, after receiving a valid timing control parameter table, pull up the data valid enable, and pull down the data valid enable after detecting the data end bit, and at the same time pull up the data end flag and continue for one clock cycle; Step b3, reading the timing control parameter in the last clock cycle of each synchronization pulse to generate the timing signal of the next synchronization pulse; Step b4, determining the radar working mode according to the timing control parameters of the current synchronization pulse sent by the timing control parameter analysis module, if the radar working mode is determined to be the normal working mode or the receiving correction working mode, jump to step b5; if the radar working mode is determined to be the transmitting correction working mode, jump to step b8; Step b5, the first generated timing signal is a synchronization pulse signal, a pri counter is generated, the default zero time is the starting time of the synchronization pulse signal, and the synchronization pulse signal is pulled high for one clock cycle; Step b6, based on the pri counter, generate a transmission waveform trigger and a transmission power modulation signal according to the signal starting position and signal length; Step b7, generate pulse count according to the number of rising edges of pri, and output the radar timing signal to the wave control subsystem and correction plug-in through optical fiber; Step b8: Determine the radar operating mode as the transmission correction operating mode according to the timing control parameters of the current synchronization pulse sent by the timing control parameter analysis module.

2. A parameterized radar timing generation method according to claim 1, characterized in that: In step b2, during the period when the data valid enable is pulled high, the parameter address is assigned to the address register, and the parameter content is stored in different data registers according to different values ​​in the address register.

3. A parameterized radar timing generation method according to claim 1, characterized in that: Each synchronization pulse under the emission correction working sequence contains n emission waveforms. The first timing signal generated is the synchronization pulse signal. The pri counter, emission waveform trigger counter and emission waveform trigger quantity counter are generated. The first emission waveform trigger signal is pulled high at the moment of zero 100us after the rising edge of the synchronization pulse signal. When the emission waveform trigger counter counts to the width of a single emission waveform trigger * 8, the first emission waveform trigger is effectively ended, and the first emission waveform trigger signal is pulled low. When the emission waveform trigger counter counts to the interval between two emission waveform triggers * 8, the first emission waveform trigger ends, and the second emission waveform trigger signal is pulled high. And so on, subsequent emission waveform trigger signals are generated continuously; each time a rising edge of the emission waveform trigger signal is detected, the emission waveform trigger quantity counter is increased by one until the emission waveform trigger quantity counter accumulates to n, and no emission waveform trigger is generated in the current synchronization pulse; n is the number of radar array AD channels).

4. A parametric radar, the working process is: step a, setting of a timing parameter control table; step b, step of generating a timing of the parametric radar; step c, the radar front end generates a waveform output according to the timing signal; characterized in that: Step b: generating a timing sequence by using a parameterized radar timing generation method as described in any one of claims 1 to 3; The radar terminal monitoring subsystem establishes a timing control parameter table according to the radar timing requirements. The timing control parameter table is sent to the parameterized radar timing generation software through optical fiber. The parameterized radar timing generation software includes a timing control parameter parsing module, a normal working timing generation module, a signal generation module and a transmission correction working timing generation module; the timing control parameter parsing module obtains the timing control parameters of the next PRI by parsing the timing control parameter table, and outputs them to the normal working mode generation module and the transmission correction working mode generation module respectively. The normal working mode generation module generates a timing signal under the normal working mode and a timing signal under the receiving correction mode according to the timing control parameters. The transmission correction working mode generation module generates a timing signal under the transmission correction working mode according to the timing control parameters. Finally, the radar working timing of the next PRI is determined according to the timing control parameters, and the radar timing signal is output when the current PRI ends.

5. A parametric radar according to claim 4, characterized in that: Step c comprises the following steps: Step c1, the radar wave control subsystem receives the timing signal and the wave control code sent by the signal processing subsystem through the optical fiber, and uploads it to the TR component through the optical fiber; Step c2, the TR component converts the serial data stream containing the timing signal and the wave control code into a parallel digital code of the basic clock rate. The parallel digital code is adjusted through the FPGA base module in the TR component to perform phase and amplitude control, amplitude and phase balance, injection of low-pass jitter signal, and conversion from the baseband frequency to the final IF. The final IF is multiplexed into 8 independent channel signals, each channel is a sub-array of a group of 8 units.

6. A parametric radar according to claim 4, characterized in that: Step a includes the following process: Step a1, the radar terminal monitoring subsystem inputs the timing control parameter table, wherein the working mode selects machine scanning or phase scanning to control the radar antenna scanning mode; the timing output selects the conventional working timing, the transmission correction timing or the reception correction timing; Step a2, input pri length to control pulse repetition period; Step a3, inputting the transmission pulse width and the transmission pulse position to generate a transmission pulse signal; Step a4, inputting power modulation width and power modulation position to generate a power modulation signal; Step a5: In dual-frequency working mode, input the timing control parameters of the second transmitting waveform in the same pri.

7. A parametric radar according to claim 4, characterized in that: In step c1, the wave control code includes frequency code, waveform code, DBF coefficient and delay compensation code.

Images