KR101784961B1 - Apparatus and method for simultaneous detecting target in near and far distance - Google Patents

Abstract

A short-range remote target detection apparatus according to the present invention includes: a long pulse signal generator for generating a long pulse signal for detecting a long-distance target; a short pulse signal generator for generating a short pulse signal for detecting a short- A first code signal generator for generating a first code signal by using a first code component as a long pulse signal, a second code signal generator for generating a second code signal using the second code component, A frequency modulator for modulating the first code signal and the second code signal through frequency up-conversion to generate an RF signal, a transmitter for amplifying the generated RF signal and transmitting the amplified RF signal through an antenna, A receiving unit that receives a reflected signal received from the near target and receives the received reflected signal; Characterized in that the first code signal is transmitted during a first period and the second code signal is transmitted during a second period after the transmission of the first code signal is completed, And the long pulse signal and the short pulse signal are orthogonal to each other.

Description

[0001] APPARATUS AND METHOD FOR SIMULTANEOUS DETECTING TARGET IN NEAR AND FAR DISTANCE [0002]

The present invention relates to a detection apparatus and method for simultaneously detecting a short-range target and a long-range target, and more particularly, to a radar using a mono-static radar using two Barker codes To a device and method for detecting a target by transmitting a code signal to a target and receiving a target reflected signal to separate the near and far target.

Generally, a radar is a means for transmitting a radio signal, receiving a signal reflected from a target to detect a target, and detecting information such as distance, direction and speed with respect to the detected target.

Korean Registered Patent No. 10-1339108 (registered)

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus and a method for efficiently detecting short-range and long-distance targets by using time resources at the time of short-range and long-distance target detection using radar .

The present invention also relates to a transmitting / receiving apparatus and a transmitting / receiving method using a Barker code used in a single-antenna radar apparatus using the same transmitting / receiving antenna.

According to an aspect of the present invention, there is provided an apparatus for simultaneously detecting a short distance remote target according to an embodiment of the present invention includes a long pulse signal generator for generating a long pulse signal for detecting a long distance target, A first code signal generator for generating a first code signal using the first code component by using the generated long pulse signal, a second code signal generator for generating the first short pulse signal using the second code component, A second code signal generator for generating a second code signal, a frequency modulator for modulating the first code signal and the second code signal through frequency up-conversion to generate an RF signal, A transmitter for transmitting through the antenna, a receiver for receiving the reflected signal reflected from the remote target and the near target, Wherein the first code signal is transmitted during a first interval and the second code signal is transmitted after the transmission of the first code signal is completed , And the long pulse signal and the short pulse signal may be transmitted to each other.

Also, the first code and the second code may be independent codes distinguished using a Barker code.

In the present invention, the receiver may further comprise: a reception signal amplifying unit amplifying the received reflection signal; a frequency demodulating unit demodulating the amplified reflection signal; a demodulating unit demodulating the demodulated reflected signal by matched filtering A baseband signal processing unit for baseband processing the signal subjected to the matched filtering, a long pulse signal for obtaining a long pulse signal reflected from the far target through the baseband processed signal, And a short pulse signal acquisition unit for acquiring a short pulse signal reflected from the near target through the acquisition unit and the baseband processed signal.

In the present invention, the target detection unit may detect a received signal by acquiring a compression gain when the code of the transmitted signal is the same as the received reflection signal code reflected from the target.

In the present invention, the short pulse signal obtaining unit may obtain the short pulse signal after a time delayed by a transmission period of the short pulse signal after the transmission of the short pulse signal is completed, After the transmission of the pulse signal is completed, the long pulse signal can be obtained after a time delayed by the transmission interval of the long pulse signal.

According to an aspect of the present invention, there is provided a method for simultaneously detecting a short distance distance, including generating a long pulse signal for detecting a long distance target, generating a short pulse signal for detecting a short distance target, Generating a first code signal using the first code component with the generated long pulse signal, generating a second code signal using the second code component with the generated short pulse signal, Modulating a signal and the second code signal through frequency up-conversion to generate an RF signal, amplifying the generated RF signal and transmitting the amplified RF signal through an antenna, receiving the reflected signal reflected from the far- And detecting the far target and the near target through the received reflected signal, The first code signal may be transmitted during a first interval and the second code signal may be transmitted during a second interval after the transmission of the first code signal is completed, They may be signals that are orthogonal to each other.

Also, the first code and the second code may be independent codes distinguished using a Barker code.

In the present invention, the receiving step includes amplifying the received reflected signal, demodulating the amplified reflected signal, performing matched filtering on the demodulated reflected signal through correlation processing, Obtaining a long pulse signal reflected from the far target through the baseband processed signal, and outputting the long pulse signal reflected from the near-field signal through the baseband processed signal, And obtaining a reflected short pulse signal from the target.

In the present invention, the step of detecting the target may detect a received signal to obtain a compression gain and to receive the code if the code of the transmitted signal is identical to the received reflection signal code reflected from the target.

The step of acquiring the short pulse signal may acquire the short pulse signal after a time delayed by a transmission interval of the short pulse signal after the transmission of the short pulse signal is completed, May acquire the long pulse signal after the transmission of the long pulse signal is completed and after a time delayed by the transmission interval of the long pulse signal.

According to the embodiment of the present invention, when transmitting / receiving a signal in the radar device, time resources can be efficiently utilized, thereby improving the target detection distance in a multi-function radar and the like, improving the tracking accuracy of the target, and the like .

1 is a view for explaining an operation example of transmitting a long pulse signal and a short pulse signal in order to detect a long distance and a short distance target in a single antenna apparatus to which the present invention is applied.
FIG. 2 illustrates an example of operation of a radar apparatus for transmitting a short pulse signal for detecting a near-distance target after a transmission period of a long-pulse signal for detecting an far-distance target in order to reduce the waste of time resources mentioned in FIG. Fig.
FIG. 3 is a view for explaining the concept of transmitting and receiving a short pulse signal and a short pulse signal for detecting a near-distance target and an far-distance target in a near-far target simultaneous detection apparatus provided with a single antenna radar according to an embodiment of the present invention.
4 is a block diagram illustrating a radar signal transmission according to an embodiment of the present invention.
FIG. 5 is a block diagram illustrating signal reception of a near-far target simultaneous detection apparatus according to an embodiment of the present invention. Referring to FIG.
6 is a flowchart of a method of transmitting a short distance remote target concurrent detection apparatus according to an embodiment of the present invention.
FIG. 7 is a flowchart of a receiving method of a near-distant target simultaneous detection apparatus according to an embodiment of the present invention.

The following merely illustrates the principles of the invention. Thus, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. Furthermore, all of the conditional terms and embodiments listed herein are, in principle, only intended for the purpose of enabling understanding of the concepts of the present invention, and are not to be construed as limited to such specifically recited embodiments and conditions do.

It is also to be understood that the detailed description, as well as the principles, aspects and embodiments of the invention, as well as specific embodiments thereof, are intended to cover structural and functional equivalents thereof. It is also to be understood that such equivalents include all elements contemplated to perform the same function irrespective of the currently known equivalents as well as the equivalents to be developed in the future, i.e., the structure.

Thus, for example, it should be understood that the block diagrams herein represent conceptual views of exemplary circuits embodying the principles of the invention. Similarly, all flowcharts, state transition diagrams, pseudo code, and the like are representative of various processes that may be substantially represented on a computer-readable medium and executed by a computer or processor, whether or not the computer or processor is explicitly shown .

The functions of the various elements shown in the figures, including the functional blocks depicted in the processor or similar concept, may be provided by use of dedicated hardware as well as hardware capable of executing software in connection with appropriate software. When provided by a processor, the functions may be provided by a single dedicated processor, a single shared processor, or a plurality of individual processors, some of which may be shared.

Also, the explicit use of terms such as processor, control, or similar concepts should not be interpreted exclusively as hardware capable of running software, and may be used without limitation as a digital signal processor (DSP) (ROM), random access memory (RAM), and non-volatile memory. Other hardware may also be included.

In the claims hereof, the elements represented as means for performing the functions described in the detailed description include all types of software including, for example, a combination of circuit elements performing the function or firmware / microcode etc. , And is coupled with appropriate circuitry to execute the software to perform the function. It is to be understood that the invention defined by the appended claims is not to be construed as encompassing any means capable of providing such functionality, as the functions provided by the various listed means are combined and combined with the manner in which the claims require .

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A radar is a device that acquires information such as the position, distance, and direction of a target by radiating a radio frequency (RF) signal, which is an electromagnetic wave, toward a target and receiving and measuring a reflected signal reflected from the target. A radar is generally divided into a dual-antenna (Bi-static) radar or a single-antenna (mono-static) radar depending on whether the transmitter for transmitting the signal and the receiver for receiving the reflected signal reflected from the target are installed separately. do.

A single-antenna radar refers to a radar that detects and tracks a target while the transmitter and the receiver are in the same position. A dual-antenna radar refers to a radar that detects and tracks a target while the transmitter and the receiver are installed separately. However, except for special cases, single-antenna (mono-static) radar is used mainly for constructing a transmitter and a receiver together in one radar for convenience of implementation and development cost.

Generally, on the side to be detected, a large amount of energy must be investigated on the target to detect a remote target through the radar. In order to do so, the target to be detected must examine the long pulse signal as a target, and in this process, the near target located within the distance of the distance target that the long pulse signal should reach is not received within the transmission period of the long pulse The target of the near region overlapping the transmission period of the long pulse will cause a problem that can not be detected. Further, even if only a part of the short-pulse transmission period overlaps with the near-target reflected signal, the exact position of the near target can not be known. Therefore, on the side to be detected, additional allocation of time resources, which is an important factor for radar operation, is required by operating the near-end detection waveform in addition to the long-range target detection waveform considering the maximum distance to be detected by the radar. In the following, a method and apparatus capable of simultaneous detection of long-range and short-range targets without additional allocation of time resources in a single-antenna radar will be described.

1 is a view for explaining an operation example of transmitting a long pulse signal and a short pulse signal in order to detect a long distance and a short distance target in a single antenna apparatus to which the present invention is applied.

In the case of the remote target detection shown in FIG. 1, the long pulse signal 104 is transmitted from the radar 100 as the transmission signal 102. As the transmitted long pulse signal 104 is first reflected on the near distance target 150 located nearer the far distance target 160, the radar system 100 will receive the near distance target reflected signal 150, To the received signal 106. [

However, the section in which the near-target reflected signal 110 is received through the receiver of the radar 100 is a transmission in which the transmitter of the radar 100 transmits the long pulse signal 104 as the transmission signal 102 through the antenna There is a non-receivable section in which the near target reflected signal through the receiver can not be detected due to the influence of the transmission leakage signal. However, since the long-pulse signal 112 reflected and received by the long-distance target 160 is received through the antenna in a region that is not temporally independent of the transmission leakage signal generated as a long-pulse signal is transmitted from the transmitter, It is possible for the radar 100 to detect the distance target if it is received for a sufficiently long time.

Therefore, in the single antenna radar to which the present invention is applied, the short pulse signal 124 for detecting the near target is solved to solve the problem that the near target is hardly detected while transmitting the long pulse signal for detecting the far target, And the near-target reflected signal 130 from the near-distance target 150 as the received signal 126, the antenna transmits the near-distant target 150 as a near-distance target through the antenna of the radar 100, The radar 100 can use the received short range target reflected signal 130 for short distance target detection because the signal is received in the time interval during which the non-receivable section 128, which is a time interval for transmitting the signal 122, has elapsed. The long-distance target reflected signal 132 reflected by the far distance target 160 is insufficient in receiving energy, so that the radar 100 can not detect the far distance target.

However, this method causes a problem of consuming a significant amount of time resources in the radar.

FIG. 2 is a flow chart illustrating a method for reducing the waste of time resources described in FIG. 1, after a transmission period of a long pulse signal 202 for detecting the far distance target 280, Which is an example of the operation of the radar device for transmitting the radio signal 206. [

In FIG. 2, the long pulse signal 202 is transmitted from the radar 200 as the transmission signal 204. As the transmitted long pulse signal 202 is first reflected on the near distance target 250 located nearer to the far distance targets 270 and 280, And receives the target reflected signal 214 as the received signal 210.

However, the section in which the near target reflected signal 214 is received through the antenna of the radar apparatus 200 is that the transmitter of the radar apparatus 200 transmits the long pulse signal 202 as the transmission signal 204 through the antenna There is a non-receivable section in which the near target reflected signal through the antenna can not be detected, such as reference numeral 208. [

2, the radar 200 transmits the short pulse signal 206 as a transmission signal immediately after completion of transmission of the long pulse signal 202 through the antenna. At this time, . 2, reference numeral 224 denotes a signal processing section for detection of a remote target after the radar 200 transmits the long pulse signal 202, reference numeral 222 denotes a short distance target detection after transmission of the short pulse signal 206, Lt; / RTI >

2 also shows that the near target reflected signal 214 of the long pulse signal 202 is received by the first near distance target 250 as the long pulse signal 202 is reflected on the first near distance target 250 during the transmission of the long pulse signal 202 The short-term target reflected signal 216 of the short pulse signal 206 is received by the antenna 210 of the radar 200 as the short pulse signal 206 is reflected on the second near distance target 260 It is difficult for the antenna to accurately identify the near targets 250 and 260 since the near target reflected signal 214 of the long pulse signal and the near target reflected signal 216 of the short pulse signal are mixed and received.

Likewise, for the far-reaching targets 270 and 280 through the antenna of the radar 200, the reflected signal 218 of the first far-field target 270 of the long-pulse signal 202 and the reflected signal 218 of the short- There is a problem that it is difficult to accurately identify the long distance targets 270 and 280 in the radar 200 because the reflected signal 220 of the long distance target 280 is mixed and received.

Although FIG. 2 shows an example of transmitting a short pulse for detecting a near-field target as soon as the long pulse transmission for detecting the distance target is completed in order to reduce the waste of time resources as mentioned in FIG. 1, When the reflection signal of the long pulse signal and the reflection signal of the short pulse signal are mixed and received by the antenna of the radar 200, the position of the target can not be accurately identified.

Accordingly, an apparatus and method for solving the difficulty of target detection through a long distance pulse signal and a short distance pulse signal in the single antenna radar described above will be described.

3 is a block diagram for explaining the concept of transmitting and receiving a short pulse signal and a short pulse signal for detecting a near-distance target and an far-distance target in a short-distance remote target simultaneous detection apparatus 300 provided with a single antenna radar according to an embodiment of the present invention. FIG.

In FIG. 3, the near-far target simultaneous detection apparatus 300 uses a first code to detect a long-pulse signal 304 for detecting far-distance targets 370 and 380 for efficient operation of time resources, And transmits a short pulse signal 306 for detecting short range targets 350 and 360 to a second section using a second code wherein the long pulse signal 304 and the short pulse signal 306 Have orthogonal signal components with respect to each other.

3, the long distance target simultaneous detection device 300 generates a long pulse signal (short pulse signal) by detecting the short pulse signal for long distance target detection 304 and the short pulse signal for short distance target detection, Pulse signal 306 immediately after transmitting the short-pulse signal 304, and can process each signal independently of receiving the reflected signals. 3, reference numeral 302 denotes a signal transmitted through a transmitter at an antenna of the near-far remote target simultaneous detection apparatus 300, and reference numeral 308 denotes a signal received at an antenna of the radar 300 through a receiver.

3, the transmitter of the near-far target simultaneous detection apparatus 300 transmits a long pulse signal 304 using a first code component through an antenna and transmits a short pulse signal 306 using a second code component do. At this time, the long pulse signal 304 and the short pulse signal 306 transmitted through the antenna can be transmitted separately on the time axis using independent code components of the Barker code. Therefore, according to the embodiment of the present invention, the long pulse signal 304 and the short pulse signal 306 are transmitted as independent signals.

In addition, according to the embodiment of the present invention, since the long pulse signal 304 and the short pulse signal 306 have a signal having a component orthogonal to each other, It is possible to easily identify the information on the long-distance target and the short-distance target even when mixed and received.

3, the transmitter of the short distance remote target coherent detection apparatus 300 transmits the long pulse signal 304 for a predetermined time interval using the first code, and then transmits the short pulse signal 306 using the second code . At this time, the period in which the long pulse signal 304 is transmitted will be the non-receivable interval (? ₁ ) 310 of the first code signal.

Similarly, the interval for transmitting the short pulse 306 using the second frequency will be the non-receivable interval ( ₂ ) 314 of the second code signal.

The transmitted long pulse signal 304 is reflected on the first short distance target 350 and then received by the receiver of the antenna of the short distance remote target concurrent detection apparatus 300 as a reflection signal like reference numeral 312, Since the partial section of the section is overlapped with the first code reception incapable section? ₁ 310 and is not included in the signal processing section 390 for detecting the long distance target, the section 312 in which the near target reflection signal is received The receiver does not perform the signal processing operation in which the transmitted long pulse signal is reflected from the target.

After the reflected signal from the first nearest target 350 is received, the reflected signal 316 reflected by the second nearest target 360 is received with the short pulse signal 306 transmitted using the second code . At this time, since it is a signal processing period for detecting a near target such as reference numeral 395, the receiver of the near-far remote target simultaneous detection apparatus 300 performs reception signal processing to identify the target.

As shown in FIG. 3, in the embodiment of the present invention, a section 395 for processing a signal reflected on the near target 350 and a section 390 for detecting a signal reflected on the far target 370, And performs signal processing. Each signal processing section is set as a section subjected to signal processing in a section in which the target is not located within the transmission pulse width. The period 395 for processing the signal reflected on the near target 350 is a time period after the transmission of the short pulse signal is completed and a time point at which transmission of the next long pulse signal starts from a time delayed by the transmission period of the short pulse signal . That is, the signal processing is performed in the near-end target signal processing section 395 for the near target and the signal processing section 390 for the far target detection is performed for the far target, It is possible to perform stable detection on distributed targets.

The far-end target signal processing period 390 is a period from the completion of the transmission of the long-pulse signal to the time when the next long-pulse signal is transmitted after a time delayed by the transmission interval of the long-pulse signal.

As described in FIG. 3, in the case of transmitting and receiving a signal according to the embodiment of the present invention, time resources can be efficiently used unlike in FIGS. 1 and 2, thereby increasing the target detection distance in a multi-function radar and the like, And the like.

4 is a block diagram illustrating a radar signal transmission according to an embodiment of the present invention.

4, the long pulse signal generator 400 generates a long pulse signal for detecting the circle distance target, and the short pulse signal generator 402 generates a short pulse signal for detecting the near distance target. At this time, the generated long pulse signal and short pulse signal are generated as orthogonal signals.

The transmitter of the near-far target simultaneous detection apparatus 300 according to the present invention shown in FIG. 4 transmits the long-distance target detection short pulse signal and the long-pulse signal and the orthogonal component short- By transmitting the encoded components on different time axes, the two code components orthogonal to each other at the time of reception of the radar are received at the same time, and the received signal is subjected to the matched filtering, thereby generating the long distance target detection long pulse signal and the near distance target The detection short pulse signal can be accurately separated.

The first code signal generator 404 generates the first code signal by combining the first code component with the long pulse signal generated by the long pulse signal generator 400 and outputs the first code signal to the frequency modulator 408 The second code signal generator 406 generates a second code signal by synthesizing the second code component with the short pulse signal generated by the short pulse signal generator 402 and outputs the second code signal to the frequency modulator 408 do. The frequency modulator 408 transmits the input first code signal and the input second code signal to the transmitter 410. The transmitter 410 amplifies the input uplink frequency and radiates it as targets through the antenna.

FIG. 5 is a block diagram illustrating signal reception of a near-far target simultaneous detection apparatus according to an embodiment of the present invention. Referring to FIG.

5, when a signal is received through the antenna 500 of the near-far target simultaneous detection apparatus, the received signal amplification unit 510 amplifies the received signal and outputs the amplified signal to the frequency demodulation unit 520.

The frequency demodulator 520 down-converts the amplified received signal.

The matched filtering signal processor 530 performs mathematical filtering on the frequency-down-converted first code signal and the second code signal from the frequency demodulator 520 through correlation processing to perform signal processing, And outputs it to the signal processing unit 540. At this time, the matched filtering signal processor 530 performs signal processing in the signal processing section 390 for detecting the original distance signal from the first code signal, and outputs the second code signal to the signal processing section 395 to perform signal processing.

More specifically, the matched filtering signal processor 530 can detect the signal as the received signal has a compression gain when the code of the reflected signal received from the target is matched with the transmitted code as the result of matched filtering . If the code of the received signal is different from the transmitted code, it is impossible to detect the signal like a noise signal. Therefore, by assigning different codes to the long-range target detection short pulse and the short- Can be operated.

The baseband signal processor 540 according to the embodiment of the present invention performs analog-to-digital conversion on the baseband signal processing for the matched-filtered signal and outputs the same. The long pulse signal acquisition unit 550 acquires the long pulse signal processed by the baseband signal and the short pulse signal acquisition unit 560 acquires the short pulse signal processed with the baseband signal.

In the present invention, the radar receiving apparatus includes a receiving signal amplifying unit 510, a frequency demodulating unit 520, a matched filtering signal processing unit 530, a baseband signal processing unit 540, a long pulse signal obtaining unit 550, The signal acquisition unit 560 will be referred to as a reception unit.

The target detection unit 570 detects the long distance target and the short distance target using the long pulse signal and the short pulse signal respectively obtained by the long pulse signal acquisition unit 550 and the short pulse signal acquisition unit 560, And outputs information such as the direction, distance, speed, and angle of the target to the user through the display means.

6 is a flowchart of a method of transmitting a short distance remote target concurrent detection apparatus according to an embodiment of the present invention.

Referring to FIG. 6, the near-far target simultaneous detection apparatus according to an embodiment of the present invention determines whether a long pulse signal generation period is generated in step 600 and generates a long pulse signal in step 605 if it is a long pulse signal generation period. And generates a first code signal using the first code component, which is a Barker code, in the long pulse signal in step 610, and upconverts (modulates) the first code signal to a final transmission frequency in step 630. [

On the other hand, if the radar transmission system is not in the long pulse signal generation period in step 600, it is determined in step 615 whether it is a short pulse signal generation period.

In step 615, the short distance remote target simultaneous detection apparatus generates a short pulse signal in step 620 if it is a short pulse signal generation period, and generates a second code signal using the second pulse code in the short pulse signal in step 625 , And upconverts (modulates) the generated second code signal to the final transmission frequency in step 630.

If the modulation is performed in step 630, the near-far remote target concurrent detection apparatus amplifies the modulated signal in step 635 and outputs a signal through the antenna in step 840.

FIG. 7 is a flowchart of a receiving method of a near-distant target simultaneous detection apparatus according to an embodiment of the present invention.

In step 700, the short-distance remote target simultaneous detection apparatus checks whether a signal is received through the antenna. If the signal is received, it amplifies the signal in step 710, and then demodulates the amplified signal in step 720.

At this time, in step 720, the frequency demodulator 520 according to an embodiment of the present invention demodulates the VR amplified received signal by performing frequency down conversion.

Upon completion of the demodulation in step 720, the signal demodulated in step 730 is subjected to matched filtering through correlation processing to perform signal processing. In step 740, the code of the matched-filtered signal (received signal) Are coincident with each other. If the received code and the transmitted code match, the received signal has a compression gain and can detect the signal. If the received code does not match the transmitted code, the received signal is detected as a long- By assigning a standalone code, which is a bucker code, to the usable pulse, it is possible to detect a distant target and a near target.

As described above, it is determined whether or not the transmitted code and the received code coincide with each other in step 740, and the baseband signal processing is performed on the matched-filtered signal in step 750.

In step 760, the long pulse signal acquisition unit 550 acquires a long pulse signal, and the short pulse signal acquisition unit 560 acquires a short pulse signal.

In step 770, using the long pulse signal obtained from the long pulse signal acquisition unit and the short pulse signal acquisition unit and the short pulse signal, the near-far target simultaneous detection apparatus simultaneously detects the near target and the far target.

In step 780, information on the detected target is provided to the user.

Also, the method of operation according to various embodiments of the invention described above may be implemented as a program and stored in various non-transitory computer readable media. A non-transitory readable medium is a medium that stores data for a short period of time, such as a register, cache, memory, etc., but semi-permanently stores data and is readable by the apparatus. In particular, the various applications or programs described above may be stored on non-volatile readable media such as CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM,

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

400: long pulse signal generating unit 402: short pulse signal generating unit
404: first code signal processing unit 406: second code signal processing unit
408: frequency modulating unit 410: amplifying unit
510: received signal amplification unit 520: frequency demodulation unit
530: matched filtering signal processor 540: baseband signal processor
550: long pulse signal acquisition unit

Claims (10)

A pulse signal generator for generating a long pulse signal for detecting a remote target having a different frequency signal and a short pulse signal for detecting a short distance target;
A code signal generator for transmitting the long pulse signal and generating a first code signal and a second code signal using the code component corresponding to each of the long pulse signals;
A transmission module for transmitting the first code signal and transmitting the second code signal after transmitting the first code signal;
A receiving module for receiving the transmitted first code signal as a first reflected signal reflected on the far target and the second reflected signal on which a second code signal is reflected on the near target; And
A second reflection signal processing section for processing the second reflection signal after a predetermined time from the completion of transmission of the second code signal, and a first reflection signal processing section for processing the first reflection signal, And a signal processor for processing the first reflection signal and the second reflection signal in the first reflection signal processing section and the second reflection signal processing section to detect the near and far target, respectively,
Wherein the first reflection signal processing section processes the first reflection signal after a time delayed by a transmission interval of the first code signal after the transmission of the first code signal from the transmission module is completed,
And the second reflected signal processing section is a section for processing the second reflected signal after a time delayed by a transmission interval of the second code signal after the transmission of the second code signal from the transmission module is completed Simultaneous detection of near - distant targets. The method according to claim 1,
Wherein the first code and the second code are independent codes separated using a Barker code. The method according to claim 1,
The receiving module includes:
A reception signal amplifying unit amplifying the received reflection signal;
A frequency demodulator for demodulating the amplified reflection signal;
A matched filtering signal processor for performing signal processing by matched filtering the demodulated reflected signal through correlation processing;
A baseband signal processor for baseband processing the signal processed by the matched filtering;
A long pulse signal acquisition unit for acquiring a long pulse signal reflected from the far target through the baseband processed signal; And
A short pulse signal acquisition unit for acquiring a short pulse signal reflected from the near target through the baseband processed signal;
Wherein the target is a remote target. The method according to claim 1,
The signal processing unit,
Further comprising a target detection unit for detecting a received signal to obtain a compression gain when the code of the transmitted signal is identical to the reflected signal code reflected from the target. delete Generating a short pulse signal for detecting a long distance target having a different frequency signal and a short pulse signal for detecting a short distance target;
Generating the first code signal and the second code signal by using the code component corresponding to each of the long pulse signals;
Transmitting the first code signal and transmitting a second code signal after transmitting the first code signal;
Receiving a first reflected signal from the transmitted first code signal and a second reflected signal reflected by the near target from a first reflected signal and a second code signal; And
A second reflection signal processing section for processing the second reflection signal after a predetermined time from the completion of transmission of the second code signal, and a first reflection signal processing section for processing the first reflection signal, And processing the first reflection signal and the second reflection signal in the first reflection signal processing section and the second reflection signal processing section to detect the near and far target, respectively,
Wherein the first reflection signal processing section is a section for processing the first reflection signal after a time delayed by a transmission interval of the first code signal after the transmission of the first code signal is completed,
Wherein the second reflected signal processing section is a section for processing the second reflected signal after a time delayed by a transmission interval of the second code signal after the transmission of the second code signal is completed. Simultaneous detection method. The method according to claim 6,
Wherein the first code and the second code are independent codes distinguished using a Barker code. The method according to claim 6,
Wherein the receiving comprises:
Amplifying the received reflected signal;
Demodulating the amplified reflected signal;
Performing signal processing by performing matched filtering on the demodulated reflected signal through correlation processing;
Performing baseband processing on the matched filtered signal;
Obtaining a long pulse signal reflected from the far target through the baseband processed signal; And
Obtaining a reflected short pulse signal from the near target through the baseband processed signal;
The method comprising the steps of: The method according to claim 6,
Wherein detecting the target comprises:
And if the code of the transmitted signal is identical to the received reflected signal code from the target, acquiring a compression gain and detecting a received signal to be received. delete

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