KR102257290B1 - Simulation signal generating apparatus and simulation signal generating method - Google Patents

Abstract

The present invention relates to a simulation signal generation apparatus capable of generating a simulation signal that can be received by receivers provided in a multi-channel radar. The simulation signal generation apparatus comprises: a signal generation unit capable of generating a plurality of digital virtual signals and arranging the virtual signals for each channel of the multi-channel radar; a signal processing unit capable of generating a high signal and a low signal having different signal strengths for each channel of the multi-channel radar by processing the virtual signals arranged for each channel; a signal conversion unit capable of generating a simulation signal for each channel of the multi-channel radar by converting and synthesizing the high signal and the low signal, generated for each channel, into analog signals; and a signal transmission unit capable of transmitting the simulation signals to each of the receivers provided for each channel of the multi-channel radar. Therefore, the performance of the receivers can be easily checked by generating a multi-band simulation signal or a wide dynamic range simulation signal.

Description

Simulation signal generation device and simulation signal generation method {SIMULATION SIGNAL GENERATING APPARATUS AND SIMULATION SIGNAL GENERATING METHOD}

The present invention relates to a simulated signal generating apparatus and a method of generating a simulated signal, and more particularly, a simulated signal generating apparatus capable of easily inspecting the performance of a receiver by generating a multi-band simulated signal or a wide dynamic range of a simulated signal, and It is about how to generate a simulated signal.

In general, a radar is a device that transmits electromagnetic waves to a target and receives a signal reflected from a target to obtain location information of a target. Previously, a mechanical radar that tracks a target while moving an antenna mechanically was mainly used, but recently, a phased array radar that adjusts the orientation direction by adjusting the phase of antennas arranged in a set pattern has been widely used.

At this time, in order to develop a phased array radar, a development support device for inspecting the performance of a receiver provided in the phased array radar is used. The development support equipment generates a simulated signal that simulates the received signal of a radar, and receives and analyzes the simulated signal through the receiver, so that the performance of the receiver can be measured.

However, conventional development support equipment operates based on a single channel or a receiver equipped with a single antenna. Therefore, there is a problem in that it is difficult to test the performance of a broadband receiver capable of processing a broadband signal because the conventional development support equipment cannot simultaneously generate a multi-band simulated signal.

In addition, the conventional development support equipment has a narrow dynamic range of a simulated signal generated. Accordingly, it is difficult to generate simulated signals of different strengths with conventional development support equipment, and thus, it is difficult to inspect the dynamic range performance of the receiver.

KR 10-1990076 B

The present invention provides a simulated signal generator and a method for generating a simulated signal capable of generating a simulated signal of multiple bands in order to check the performance of a receiver.

The present invention provides a simulated signal generating apparatus and a method of generating a simulated signal capable of generating a simulated signal of a wide dynamic range in order to check the performance of a receiver.

The present invention is a simulated signal generator capable of generating a simulated signal that can be received by a receiver provided in a multi-channel radar, capable of generating a plurality of digital virtual signals, and generating virtual signals for each channel of the multi-channel radar. A signal generator that can be aligned; A signal processor capable of processing the virtual signals arranged for each channel to generate high and low signals having different signal strengths for each channel of the multi-channel radar; A signal conversion unit capable of generating a simulated signal for each channel of the multi-channel radar by converting and synthesizing the high and low signals generated for each channel into an analog form; And a signal transmission unit for directly inputting simulated signals to each of the receivers provided for each channel of the multi-channel radar.

The signal transmission unit may be formed in the form of a cable, and one end may be connected to the signal conversion unit, and the other end may be detachably connected to the receiver.

The present invention is a simulated signal generator capable of generating a simulated signal that can be received by a receiver provided in a multi-channel radar, capable of generating a plurality of digital virtual signals, and generating virtual signals for each channel of the multi-channel radar. A signal generator that can be aligned; A signal processor capable of processing the virtual signals arranged for each channel to generate high and low signals having different signal strengths for each channel of the multi-channel radar; A signal conversion unit capable of generating a simulated signal for each channel of the multi-channel radar by converting and synthesizing the high and low signals generated for each channel into an analog form; And

And a signal transmission unit that radiates simulated signals to antennas provided for each channel of the multi-channel radar and transmits them to a receiver connected to each antenna.

The signal transmission unit is formed in the form of a multi-channel antenna.

The high signal is a signal having a signal strength greater than a preset reference strength value, the low signal is a signal having a signal strength smaller than the reference strength value, and the signal processing unit is provided with a plurality of channels as many as the number of channels provided in the multi-channel radar. Thus, virtual signals can be processed for each channel of the multi-channel radar.

The signal generator may include a signal specification setter capable of setting at least one of a pulse repetition period, a pulse length, a signal strength, and a frequency of the virtual signals; A reception environment setter capable of setting a reception environment of the receiver; And a sorter that sorts virtual signals for each channel of the multi-channel radar and classifies them into high-level virtual signals and low-level virtual signals according to signal strength.

The aligner may compare the signal strength of the virtual signals with a preset reference strength value and divide the signal into a high-level virtual signal greater than the reference strength value and a low-level virtual signal less than the reference strength value.

The signal processing unit may include a high signal synthesizer capable of synthesizing high level virtual signals of the same channel to generate high signals for each channel of the multi-channel radar; A high signal frequency booster capable of increasing a frequency band of a high signal; A low signal synthesizer capable of synthesizing low-level virtual signals of the same channel to generate low signals for each channel of the multi-channel radar; And a low signal frequency booster capable of increasing a frequency band of the low signal.

The signal conversion unit may include a high signal converter capable of converting a high signal into an analog form; A low signal converter capable of converting a low signal into an analog form; And a simulation signal synthesizer capable of synthesizing a high signal and a low signal of the same channel to generate a simulation signal for each channel of the multi-channel radar.

The present invention is a simulation signal generating method capable of generating a simulated signal that can be received by a receiver provided in a multi-channel radar, generating a plurality of digital virtual signals and arranging the virtual signals for each channel of the multi-channel radar. process; Generating a high signal and a low signal having different signal strengths for each channel of the multi-channel radar by processing the virtual signals arranged for each channel; Converting and synthesizing a high signal and a low signal generated for each channel into an analog form to generate a simulated signal for each channel of the multi-channel radar; And a process of directly inputting simulated signals to each of the receivers provided for each channel of the multi-channel radar.

The present invention is a simulation signal generating method capable of generating a simulated signal that can be received by a receiver provided in a multi-channel radar, generating a plurality of digital virtual signals and arranging the virtual signals for each channel of the multi-channel radar. process; Generating a high signal and a low signal having different signal strengths for each channel of the multi-channel radar by processing the virtual signals arranged for each channel; Converting and synthesizing a high signal and a low signal generated for each channel into an analog form to generate a simulated signal for each channel of the multi-channel radar; And a process of radiating simulated signals to antennas provided for each channel of the multi-channel radar and transmitting them to a receiver connected to each antenna.

The process of arranging the virtual signals for each channel of the multi-channel radar includes comparing the signal strength of the virtual signals with a reference strength value predetermined for each channel, and a high-level virtual signal greater than the reference strength value and a smaller value than the reference strength value. It includes the process of classifying it into a low-level virtual signal.

In the process of generating the high signal and the low signal, high-level virtual signals of the same channel are synthesized to generate high signals for each channel of the multi-channel radar, and low-level virtual signals of the same channel are synthesized to generate the high-level virtual signals of the multi-channel radar. Generating low signals for each channel; And increasing the frequency band of the high signal and the low signal.

According to embodiments of the present invention, it is possible to simultaneously generate a multi-band simulated signal. Accordingly, it is possible to easily test the broadband signal processing performance of the receiver by using the simulated signal.

In addition, according to embodiments of the present invention, it is possible to generate a simulation signal of a wide dynamic range. Accordingly, by generating simulated signals of different strengths, it is possible to easily check the dynamic range performance of the receiver.

1 is a diagram showing the structure of a simulated signal generating apparatus according to an embodiment of the present invention.
2 is a diagram showing the structure of a signal generator according to an embodiment of the present invention.
3 is a diagram illustrating a structure of a signal processing unit according to an embodiment of the present invention.
4 is a diagram showing the structure of a signal conversion unit according to an embodiment of the present invention.
5 is a diagram illustrating a process of generating a simulated signal according to an embodiment of the present invention.
6 is a diagram showing the structure of a simulated signal generating apparatus according to another embodiment of the present invention.
7 is a flowchart illustrating a method of generating a simulation signal according to an embodiment of the present invention.
8 is a flow chart showing a method of generating a simulated signal according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only the present embodiments make the disclosure of the present invention complete, and the scope of the invention to those of ordinary skill in the art It is provided to inform you. In order to describe the invention in detail, the drawings may be exaggerated, and the same reference numerals refer to the same elements in the drawings.

1 is a diagram showing the structure of a simulated signal generator according to an embodiment of the present invention, FIG. 2 is a view showing the structure of a signal generator according to an embodiment of the present invention, and FIG. 3 is a diagram showing the structure of a signal generator according to an embodiment of the present invention. A diagram showing a structure of a signal processing unit, and FIG. 4 is a diagram showing a structure of a signal conversion unit according to an embodiment of the present invention. Hereinafter, an apparatus for generating a simulated signal according to an embodiment of the present invention will be described.

The apparatus for generating a simulation signal according to an embodiment of the present invention may generate a simulation signal that can be received by a receiver provided in a multi-channel radar. Referring to FIG. 1, the simulated signal generating apparatus 100 includes a signal generating unit 110, a signal processing unit 120, a signal converting unit 130, and a signal multiple channel 140.

In this case, the multi-channel radar may include a plurality of antennas and a plurality of receivers. A receiver may be connected to each of the antennas to form a channel. Thus, a multi-channel radar may have a plurality of channels.

The signal generator 110 may generate a plurality of digital virtual signals. For example, the virtual signal generated by the signal generator 110 may be an I/Q signal. As shown in FIG. 2, the signal generator 110 includes a signal specification setter 111, a reception environment setter 112, and an aligner 116.

The signal specification setter 111 may set the pulse repetition period, pulse length, signal strength, and frequency of the virtual signal. Accordingly, the user can control the operation of the signal specification setter 111 to set the specification of the virtual signal.

The reception environment setter 112 may set a reception environment of the receiver 50. The reception environment setter 112 may include a receiver setter 112a, a clutter environment setter 112b, and a noise setter 112c.

The receiver setter 112a may set the position of the receiver 50 and an antenna gain. Accordingly, the user may control the operation of the receiver setter 112a to set a position at which the receiver 50 receives the signal in the virtual signal.

The clutter environment setter 112b may set a clutter position around the receiver 50 and a radar cross-section (RCS). The radar cross section represents the extent to which the target appears on the radar. Accordingly, the user can control the clutter environment setter 112b to set the size of the clutter and the target in the virtual signal.

The noise setter 112c may set white noise, reflected noise, and errors that may occur in the reception environment of the receiver 50. Accordingly, the user can control the noise setter 112c to set the reception environment of the receiver 50 to the virtual signal.

Meanwhile, as shown in FIG. 2, the signal generator 110 may further include at least one of a modulator 113, a time delay setter 114, and a phase setter 115. Accordingly, a virtual signal can be generated more similar to an actual radar signal.

The modulator 113 may modulate a virtual signal. For example, the modulator 113 may modulate the frequency and signal strength of each of the virtual signals.

The time delay setter 114 may set the Doppler frequency according to the arrival time of the virtual signal and the target speed. At this time, the time delay setter 114 may set the Doppler frequency of each of the virtual signals.

The phase setter 115 may set phase difference information of an array antenna provided in the radar to each of the virtual signals. That is, it is possible to set the reception gain difference and phase difference information for the virtual signal for each channel based on the array manifold information (the size and phase difference for each frequency/azimuth angle) of the array antenna.

The aligner 116 may arrange a plurality of virtual signals for each channel of a multi-channel radar. Alternatively, virtual signals may be duplicated to correspond to each channel. Accordingly, virtual signals of different frequencies may be arranged for each channel.

In addition, the aligner 116 may sort and sort the virtual signals of each channel according to signal strength. For example, the aligner 116 may compare the signal strength of each of the virtual signals with a predetermined reference strength value. Accordingly, the aligner 116 may divide and sort the virtual signals for each channel of the radar into a high-level virtual signal greater than the reference strength value and a low-level virtual signal less than the reference strength value.

In this case, the reference strength value may be a value obtained by dividing the sum of the virtual signal having the largest signal strength and the virtual signal having the smallest signal strength among the virtual signals by half. However, the method of setting the reference strength value is not limited thereto and may be various.

The signal processing unit 120 is connected to exchange signals with the signal generation unit 110 as shown in FIG. 2. Accordingly, the signal processing unit 120 may generate a high signal and a low signal having different signal strengths for each channel of the multi-channel radar by processing the virtual signals arranged for each channel. The high signal may be a signal having a signal strength greater than the reference strength value, and the low signal may be a signal having a signal strength less than the reference strength value. As shown in FIG. 3, the signal processing unit 120 includes a high signal synthesizer 121, a high signal frequency increaser 122, a low signal synthesizer 123, and a low signal frequency increaser 124. In this case, the virtual signals transmitted to the signal processing unit 120 may be baseband signals.

The high signal synthesizer 121 may generate a high signal by synthesizing high level virtual signals of different frequencies. The high signal synthesizer 121 may include a first interpolation unit 120a, a first filter 120b, a first mixer 120c, and a synthesis unit 120d.

The first interpolation unit 120a may sample-interpolate the baseband virtual signal. For example, among virtual signals arranged for each channel of the radar, virtual signals of a corresponding channel may be selected, and a virtual signal greater than a reference strength value among the virtual signals of the selected channel may be sample-interpolated.

The first filter 120b may remove an unwanted wave component from the virtual signal that has passed through the first interpolation unit 120a. Accordingly, unnecessary frequencies can be removed from the virtual signal.

The first mixer 120c may synthesize a virtual signal that has passed through the first filter 120b with a pre-generated first frequency uplink signal. Accordingly, as the virtual signal is synthesized with the first frequency uplink signal, the frequency may increase from the baseband to the intermediate frequency (IF).

In this case, a plurality of the first interpolation units 120a, the first filters 120b, and the first mixer 120c may be provided. Accordingly, high-level virtual signals of the same channel can be processed while passing through different paths.

The combining unit 120d may synthesize virtual signals transmitted from different first mixers 120c into one signal. That is, virtual signals that have been processed while moving along different paths are met and synthesized by the combining unit 120d to generate a high signal. Accordingly, high-level virtual signals of different frequencies may be combined.

The high signal frequency increaser 122 may increase the frequency band of the high signal transmitted from the high signal synthesizer 121. The high signal frequency increaser 122 may include a second interpolation unit 120e, a second filter 120f, and a second mixer 120g.

The second interpolation unit 120e may sample-interpolate the high signal. That is, the second interpolation unit 120e may sample-interpolate the high signal by receiving the high signal from the synthesis unit 120d.

The second filter 120f may remove an unwanted wave component from the high signal that has passed through the second interpolation unit 120e. Accordingly, unnecessary frequencies can be removed from the high signal.

The second mixer 120g may synthesize a high signal that has passed through the second filter 120f with a pre-generated second frequency uplink signal. Accordingly, as the virtual signal is synthesized with the second frequency uplink signal, the frequency may increase from an intermediate frequency band to a radio frequency (RF).

The low signal synthesizer 123 may generate a low signal by synthesizing low-level virtual signals. Unlike the high signal synthesizer 121 that processes high-level virtual signals, the low signal synthesizer 123 only processes low-level virtual signals, and includes components and structures that may be the same. Therefore, in the description of the high signal synthesizer 121,'virtual signals determined to be greater than the reference strength value' are modified to'virtual signals judged to be less than the reference strength value', and the'high signal' is changed to the'low signal. If corrected to', since the descriptions of the components and structures are the same, the descriptions of the components and structures of the low signal synthesizer 123 will be omitted.

The low signal frequency increaser 124 may increase the frequency band of the low signal transmitted from the low signal synthesizer 123. Unlike the high signal frequency booster 122, the low signal frequency increaser 124 only processes a low signal, and components and structures included therein may be the same. Therefore, in the description of the high signal frequency increaser 122, if the'high signal' is modified to the'low signal', the description of the components and the structure is the same, so that the components of the low signal frequency increaser 124 and the A description of the structure will be omitted.

In this case, a plurality of signal processing units 120 may be provided. For example, the signal processing unit 120 may be provided with as many as the number of channels provided in the multi-channel radar. Accordingly, the virtual signals arranged by the sorter 116 by channels of multiple radars may be transferred to and processed by different signal processing units 120. Accordingly, a high signal and a low signal may be generated for each channel of the multi-channel radar.

The signal conversion unit 130 is connected to exchange signals with the signal processing unit 120 as shown in FIGS. 1 and 4. The signal conversion unit 130 may generate a simulated signal for each channel of a multi-channel radar by converting and synthesizing the high signal and the low signal transmitted from the signal processing unit 120 into an analog form. The signal conversion unit 130 includes a high signal converter 131, a low signal converter 132, and a simulated signal synthesizer 133.

The high signal converter 131 may convert a high signal. For example, the high signal converter 131 may be a digital-to-analog converter. Accordingly, the high signal converter 131 may convert a digital high signal into an analog form.

The low signal converter 132 may convert a low signal. For example, the low signal converter 132 may be a digital-to-analog converter. Accordingly, the low signal converter 132 may convert a digital low signal into an analog form.

The simulation signal synthesizer 133 may generate a simulation signal by synthesizing an analog high signal and a low signal. The simulation signal synthesizer 133 may include an attenuator 133a, a combiner 133b, an amplifier 133c, and a third filter 133d.

In this case, the dynamic range of the signal output from the digital-to-analog converter may be narrow. Therefore, since the high signal is converted into an analog form by the converter 131 and the low signal is converted into an analog form by the low signal converter 132, the high signal and the low signal are combined, so that the dynamic range of the simulated signal is reduced. The dynamic range can be extended by up to twice as much as when using a single digital-to-analog converter.

The attenuator 133a may receive a low signal from the low signal converter 132. Accordingly, the attenuator 133a may attenuate the low signal. Accordingly, the low signal simulation and the gain for the simulation signal can be adjusted.

The combiner 133b may receive a high signal from the high signal converter 131 and may receive a low signal from the attenuator 133a. Accordingly, the combiner 133b may generate a simulation signal by combining the high signal and the low signal.

The amplifier 133c may receive the simulated signal from the combiner 133b. Accordingly, the amplifier 133c may amplify and output the simulated signal.

The third filter 133d may receive a simulation signal from the amplifier 133c. Accordingly, the third filter 133d may filter the simulated signal to remove the unwanted wave component. Accordingly, a simulation signal from which the unwanted wave has been removed can be output.

In this case, the signal conversion unit 130 may include a plurality of high signal converters 131, low signal converters 132, and simulated signal synthesizers 133. Accordingly, the signal conversion unit 130 may generate a simulated signal for each channel of the multi-channel radar. Accordingly, the signal conversion unit 130 may output a multi-channel simulation signal.

The signal transmission unit 140 is connected to exchange signals with the signal conversion unit 130. Accordingly, the signal transmission unit 140 may directly input the simulated signals transmitted from the signal conversion unit 130 to each of the receivers 50 provided for each channel of the multi-channel radar. For example, the signal transmission unit 140 may be formed in the form of a cable, and one end may be connected to the signal conversion unit 130 and the other end may be detachably connected to the receiver 50.

In this case, in order to connect the signal transmission unit 140 to the receiver 50, antennas may not be connected to the receivers 50. Accordingly, since the signal transmission unit 140 can be directly connected to the receiver 50, the simulated signal transmitted by the signal transmission unit 140 can be directly input to the receiver 50 without passing through an antenna. Accordingly, the signal transmission unit 140 can stably transmit the simulated signals generated for each channel of the multi-channel radar to each of the receivers 50 of the corresponding channel, and the receivers 50 provided in the multi-channel radar The performance can be easily checked.

In addition, since the signal transmission unit 140 is detachably connected to the receivers 50, the signal transmission unit 140 and the receiver 50 can be easily separated after the performance test. Accordingly, an antenna may be connected to each of the receivers 50.

5 is a diagram illustrating a process of generating a simulated signal according to an embodiment of the present invention. Hereinafter, an operation of generating a simulated signal by an apparatus for generating a simulated signal according to an embodiment of the present invention will be described.

1 and 5, the signal generator 110 generates a virtual signal for each set scenario (virtual signal specifications, operating environment of the radar receiver 50, etc.). The signal branch unit 120 generates virtual signals of I/Q data by branching the virtual signal generated by the signal generation unit 110. For signal distribution and processing according to the dynamic range, the virtual signals are divided into high level (high level, signal strength greater than the reference strength value) virtual signal and low level (low level, signal strength less than the reference strength value). Signal) is classified as a virtual signal and transmitted to the signal processing unit 120.

The signal processing unit 120 up-converts each of the transmitted baseband high-level virtual signals and low-level virtual signals to an intermediate band. At this time, since the virtual signals generated in the baseband are generated at a low sampling rate, data between each sample is interpolated step by step according to the sampling frequency of the signal converter 130, and unnecessary signals other than the channel are filtered to be raised. Convert.

In addition, in order to reduce a frequency up-conversion error of a path between a high-level virtual signal and a low-level virtual signal between channels, the first frequency up-conversion signal applied to the same channel may be shared between the paths of the high-level virtual signal and the low-level virtual signal. . Accordingly, it is possible to minimize a frequency up-conversion error of a path between a high-level virtual signal and a low-level virtual signal, and to reduce logic usage.

In this case, a high signal and a low signal may be generated by dividing and synthesizing the virtual signals for each channel whose frequency is up-converted to the intermediate band for each channel within one intermediate band. Accordingly, it is possible to form an intermediate band channel in the form of multiple signals.

In addition, the signal processing unit 120 may interpolate data once again according to the sampling frequency of the signal conversion unit 130 on each of the high signal and the low signal, and filter unnecessary signals outside the intermediate frequency band. Each of the filtered high and low signals is up-converted to a radiation band frequency.

The signal conversion unit 130 performs digital-analog conversion on a digital high signal and a low signal. The unwanted wave generated while converting to an analog form can be removed by performing low-pass filtering.

In addition, it is possible to simulate the low signal and adjust the gain for the output signal by using an analog attenuator for the low signal. Finally, a simulation signal is output by synthesizing a high signal and a low signal in a multi-channel environment. In this case, the same process is performed in other channel paths, and as a result, the simulated signal can be simulated in the form of a multi-channel received signal. Accordingly, it is possible to easily test the broadband signal processing performance of the receiver by using the simulated signal, and it is possible to easily test the dynamic range performance of the receiver by generating simulated signals of different strengths.

6 is a diagram showing the structure of a simulated signal generating apparatus according to another embodiment of the present invention. Hereinafter, an apparatus for generating a simulated signal according to another embodiment of the present invention will be described.

The simulated signal generator according to another embodiment of the present invention may generate a simulated signal that can be received by a receiver provided in a multi-channel radar. Referring to FIG. 6, the simulated signal generator 100 includes a signal generating unit 110, a signal branching unit 120, a signal processing unit 120, a signal converting unit 130, and a signal transmitting unit 140. .

At this time, the simulated signal generator 100 according to another embodiment of the present invention includes a signal generator 110, a signal branch 120, and a signal having the same structure as the simulated signal generator according to an embodiment of the present invention. A processing unit 120 and a signal conversion unit 130 may be provided. Therefore, since the structures of the signal generation unit 110, the signal branch unit 120, the signal processing unit 120, and the signal conversion unit 130 are described above, the simulated signal generation apparatus according to another embodiment of the present invention In the description of (100), the description will be omitted.

The signal transmission unit 140 is connected to exchange signals with the signal conversion unit 130. Accordingly, the signal transmission unit 140 may radiate the simulated signals transmitted from the signal conversion unit 130 to antennas provided for each channel of the multi-channel radar and transmit them to a receiver connected to each antenna.

For example, the signal transmission unit 140 may be formed in the form of a multi-channel antenna, and may be disposed close to the antennas 40 of the multi-channel radar. That is, the signal transmission unit 140 may be formed corresponding to an antenna provided in a multi-channel radar. Accordingly, the simulated signal radiated by the signal transmission unit 140 may be received by the antennas 40 and transmitted to each receiver 50 to which the antennas 40 are connected.

In this case, the antenna 40 may not be separated from the receiver 50 in order to check the performance of the receiver 50. Therefore, since the performance of the receiver 50 can be inspected while the antenna 40 is connected to the receiver 50, preparation for the inspection operation can be simplified. Accordingly, it is possible to easily test the performance of the receiver 50 to which the antenna 40 is connected. However, the present invention is not limited thereto and various combinations are possible between the embodiments.

7 is a flowchart illustrating a method of generating a simulation signal according to an embodiment of the present invention. Hereinafter, a method of generating a simulation signal according to an embodiment of the present invention will be described.

The method of generating a simulation signal according to an embodiment of the present invention may generate a simulation signal that can be received by a receiver provided in a multi-channel radar. Referring to FIG. 7, the method of generating a simulation signal includes a process of generating a plurality of digital virtual signals and arranging the virtual signals for each channel of a multi-channel radar (S110), and processing the virtual signals arranged for each channel to have different signal strengths. A process of generating a high signal and a low signal for each channel of a multi-channel radar (S120), a process of generating a simulated signal for each channel of a multi-channel radar by converting and synthesizing the high and low signals generated for each channel into an analog form (S130) ), and a process of directly inputting the simulated signals to each of the receivers provided for each channel of the multi-channel radar (S141).

First, a plurality of digital virtual signals are generated, and the virtual signals are arranged for each channel of a multi-channel radar (S110). That is, virtual signals may be generated for each set scenario (virtual signal specifications, operating environment of the radar receiver 50, etc.). The virtual signals may be classified and sorted for each channel of a multi-channel radar.

In addition, virtual signals arranged for each channel can be arranged according to signal strength. Accordingly, the virtual signals may be classified into a high level virtual signal and a low level virtual signal according to signal strength for signal distribution and processing according to a dynamic range.

For example, it is possible to compare the signal strength of each of the virtual signals with a predetermined reference strength value. Accordingly, the virtual signals for each channel of the radar can be sorted by dividing into a high-level virtual signal having a signal strength greater than the reference strength value and a low-level virtual signal having a signal strength less than the reference strength value.

In this case, the virtual signals may have different frequencies. Alternatively, the sample positions may be different. Therefore, when the virtual signals are synthesized, the signals can be connected while being arranged at different frequencies.

Then, by processing the virtual signals arranged for each channel, a high signal and a low signal having different signal strengths are generated for each channel of the multi-channel radar (S120). That is, high-level virtual signals of the same channel may be synthesized to generate a high signal, and low-level virtual signals of the same channel may be synthesized to generate a low signal. Accordingly, a high signal and a low signal may be generated for each channel of the multi-channel radar.

In this case, the frequency band may be increased before and after synthesizing the high-level virtual signals and the low-level virtual signals. For example, before synthesizing the high-level virtual signals, the baseband frequency of the high-level virtual signals may be raised to the intermediate band frequency, and after generating the high signal, the intermediate band frequency of the high signal may be increased to the frequency of the radiation band. . Before synthesizing the low-level virtual signals, the baseband frequencies of the low-level virtual signals may be increased to the intermediate band frequency, and after generating the low signal, the intermediate band frequency of the low signal may be increased to the frequency of the radiation band. Accordingly, a high signal and a low signal having a frequency in the radiation band may be generated for each channel.

Then, the high signal and the low signal generated for each channel are converted into an analog form and synthesized to generate a simulated signal for each channel of the multi-channel radar (S130). That is, the high signal and the low signal can be synthesized by arranging different frequencies.

Then, the simulated signals are directly input to each of the receivers provided for each channel of the multi-channel radar (S141). That is, by connecting a cable line to the receiver, the simulated signal can be directly input to the receiver. Therefore, since the simulated signal can be directly transmitted to the receiver without passing through the antenna, the simulated signal can be stably transmitted to the receiver. Accordingly, by analyzing the simulated signal received by the receiver, the performance of the receiver may be inspected or measured.

In this way, a simulation signal having a high dynamic range can be simulated by dividing a path through which the high signal and the low signal are processed. Accordingly, it is possible to effectively verify the multi-signal dynamic range processing performance of a receiver provided in a multi-channel radar.

8 is a flow chart showing a method of generating a simulated signal according to an embodiment of the present invention. Hereinafter, a method of generating a simulation signal according to another embodiment of the present invention will be described.

A method of generating a simulated signal according to another embodiment of the present invention is a method of generating a simulated signal capable of generating a simulated signal that can be received by a receiver provided in a radar. Referring to FIG. 8, the method of generating a simulation signal includes a process of generating a plurality of digital virtual signals and arranging the virtual signals for each channel of a multi-channel radar (S110), and processing the virtual signals arranged for each channel to have different signal strengths. A process of generating a high signal and a low signal for each channel of a multi-channel radar (S120), a process of generating a simulated signal for each channel of a multi-channel radar by converting and synthesizing the high and low signals generated for each channel into an analog form (S130) ), and a process of radiating the simulated signals to antennas provided for each channel of the multi-channel radar and transmitting them to a receiver connected to each antenna (S142).

In this case, in the method of generating a simulation signal according to another embodiment of the present invention, in the same manner as the method of generating a simulation signal according to an embodiment of the present invention, a plurality of digital virtual signals are generated, and a virtual signal is generated for each channel of a multi-channel radar. The process of aligning the signals (S110), the process of generating high and low signals having different signal strengths for each channel of the multi-channel radar by processing the virtual signals arranged for each channel (S120), the high and low signals generated for each channel A process of generating a simulated signal for each channel of a multi-channel radar by converting and synthesizing the signal into an analog form may be performed (S130). Since these processes have been described above, the description will be omitted below.

When a simulated signal is generated, the simulated signals are radiated to antennas provided for each channel of the multi-channel radar and transmitted to a receiver connected to each antenna (S142). That is, it is possible to radiate a simulated signal to a multi-channel radar using equipment such as an array antenna. Accordingly, simulated signals may be received by an antenna provided in a multi-channel radar and transmitted to a receiver connected to each antenna. Accordingly, it is possible to easily check the performance while the antenna is connected to the receiver provided in the multi-channel radar.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention, and various combinations between the embodiments are possible. Therefore, the scope of the present invention should not be defined by being limited to the described embodiments, and should be defined by the claims to be described below as well as the claims and their equivalents.

100: simulation signal generator 110: signal generator
120: signal processing unit 130: signal conversion unit
140: signal transmission unit

Claims (13)

As a simulated signal generator capable of generating a simulated signal that can be received by a receiver provided in a multi-channel radar,
A signal generator capable of generating a plurality of digital virtual signals and arranging the virtual signals for each channel of the multi-channel radar;
A signal processor capable of processing the virtual signals arranged for each channel to generate high and low signals having different signal strengths for each channel of the multi-channel radar;
A signal conversion unit capable of generating a simulated signal for each channel of the multi-channel radar by converting and synthesizing the high and low signals generated for each channel into an analog form; And
A simulated signal generator comprising a; signal transmission unit for directly inputting the simulated signals to each of the receivers provided for each channel of the multi-channel radar. The method according to claim 1,
The signal transmission unit is formed in the form of a cable, one end is connected to the signal conversion unit, the other end is a simulated signal generator that can be connected detachably to the receiver. As a simulated signal generator capable of generating a simulated signal that can be received by a receiver provided in a multi-channel radar,
A signal generator capable of generating a plurality of digital virtual signals and arranging the virtual signals for each channel of the multi-channel radar;
A signal processor capable of processing the virtual signals arranged for each channel to generate high and low signals having different signal strengths for each channel of the multi-channel radar;
A signal conversion unit capable of generating a simulated signal for each channel of the multi-channel radar by converting and synthesizing the high and low signals generated for each channel into an analog form; And
And a signal transmission unit that radiates simulated signals to antennas provided for each channel of the multi-channel radar and transmits them to a receiver connected to each antenna. The method of claim 3,
The signal transmission unit is a simulated signal generator formed in the form of a multi-channel antenna. The method according to any one of claims 1 to 4,
The high signal is a signal having a signal strength greater than a preset reference strength value, and the low signal is a signal having a signal strength less than the reference strength value,
The signal processing unit is provided with a plurality of channels as many as the number of channels provided in the multi-channel radar, so that the simulated signal generating apparatus can process virtual signals for each channel of the multi-channel radar. The method according to any one of claims 1 to 4,
The signal generation unit,
A signal specification setter capable of setting at least one of a pulse repetition period, a pulse length, a signal strength, and a frequency of the virtual signals;
A reception environment setter capable of setting a reception environment of the receiver; And
A simulated signal generator comprising: a sorter that sorts virtual signals for each channel of the multi-channel radar and classifies them into high-level virtual signals and low-level virtual signals according to signal strength. The method of claim 6,
The aligner,
A simulated signal generator capable of comparing signal strengths of virtual signals with a preset reference strength value and distinguishing between a high level virtual signal greater than the reference strength value and a low level virtual signal less than the reference strength value. The method of claim 6,
The signal processing unit,
A high signal synthesizer capable of synthesizing high-level virtual signals of the same channel to generate high signals for each channel of the multi-channel radar;
A high signal frequency booster capable of increasing a frequency band of a high signal;
A low signal synthesizer capable of synthesizing low-level virtual signals of the same channel to generate low signals for each channel of the multi-channel radar; And
A simulation signal generator comprising a; a low signal frequency increaser capable of increasing a frequency band of the low signal. The method of claim 8,
The signal conversion unit,
A high signal converter capable of converting a high signal into an analog form;
A low signal converter capable of converting a low signal into an analog form; And
And a simulation signal synthesizer capable of generating a simulation signal for each channel of the multi-channel radar by synthesizing a high signal and a low signal of the same channel. A method of generating a simulated signal capable of generating a simulated signal that can be received by a receiver provided in a multi-channel radar,
Generating a plurality of digital virtual signals and arranging the virtual signals for each channel of the multi-channel radar;
Generating a high signal and a low signal having different signal strengths for each channel of the multi-channel radar by processing the virtual signals arranged for each channel;
Converting and synthesizing a high signal and a low signal generated for each channel into an analog form to generate a simulated signal for each channel of the multi-channel radar; And
The method of generating a simulated signal comprising a; step of directly inputting the simulated signals to each of the receivers provided for each channel of the multi-channel radar. A method of generating a simulated signal capable of generating a simulated signal that can be received by a receiver provided in a multi-channel radar,
Generating a plurality of digital virtual signals and arranging the virtual signals for each channel of the multi-channel radar;
Generating a high signal and a low signal having different signal strengths for each channel of the multi-channel radar by processing the virtual signals arranged for each channel;
Converting and synthesizing a high signal and a low signal generated for each channel into an analog form to generate a simulated signal for each channel of the multi-channel radar; And
And a process of radiating simulated signals to antennas provided for each channel of the multi-channel radar and transmitting them to a receiver connected to each antenna. The method according to claim 10 or 11,
The process of arranging virtual signals for each channel of the multi-channel radar,
A method for generating a simulated signal, comprising: comparing a signal strength of a predetermined reference strength value for each channel with a signal strength of virtual signals, and classifying a high-level virtual signal greater than the reference strength value and a low-level virtual signal less than the reference strength value . The method of claim 12,
The process of generating the high signal and the low signal,
Synthesizing high-level virtual signals of the same channel to generate high signals for each channel of the multi-channel radar, and synthesizing low-level virtual signals of the same channel to generate low signals for each channel of the multi-channel radar; And
The method of generating a simulation signal comprising a; step of increasing the frequency band of the high signal and the low signal.

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