JP5707679B2 - Receiving apparatus and method thereof, radar apparatus and receiving method thereof - Google Patents

Description

  The present invention relates to a receiving apparatus and method thereof, a radar apparatus and a receiving method thereof, and more particularly to a receiving apparatus and method and a radar apparatus and receiving method useful for improving the dynamic range of a receiving system.

FIG. 6 shows a conventionally known radar apparatus (hereinafter referred to as a conventional technique). In the radar apparatus shown in FIG. 6, the transmission signal output from the modulator 11 is radiated toward the target via the transmitter 12, the duplexer 13, and the antenna 14.
A reflected signal (also referred to as a received signal) that is reflected back from the target is received by a receiving system 50 configured as follows, and is used for calculation of a target radar reflection area (RCS). .
The receiving system 50 includes an antenna 14, a duplexer 13, a high frequency amplifier 21, a mixer 22, an intermediate frequency amplifier 23, an I / Q detector 25, an A / D converter 26, and an amplitude detector 27. Composed.

In the receiving system 50, the reflected signal is received by the antenna 14, branched by the duplexer 13, and input to the high frequency amplifier 21. The received signal is amplified by the high frequency amplifier 21 and then frequency-converted by the mixer 22. The frequency-converted signal is amplified by the intermediate frequency amplifier 23 and I / Q detection is performed by the I / Q detector 25.
The signal output from the I / Q detector 25 is converted into a digital signal by the A / D converter 25. The amplitude detector 27 that receives this digital signal detects the amplitude of the signal reflected from the target. An RCS calculator 28 that receives the detected amplitude value calculates a target radar reflection area (RCS).
In the radar apparatus, when the S / N ratio of the received signal is sufficient, the intended purpose can be achieved.

  Patent Document 1 describes a radar reflection cross-section measuring device that can measure the reflected signal phase of an RCS target with high accuracy. This apparatus uses a reflected signal phase from a reference reflector whose distance from an antenna is fixed as a spatial comparison phase signal for detection of a reflected signal phase of an RCS target. In other words, even if the reflected signal phase of the RCS target changes due to some cause, the RCS measurement is independent of the phase stability of the transceiver. Here, the S / N of the reflected signal that appears in the processing inside the transceiver is not discussed.

  Patent Document 2 describes a pseudo target signal generator that can perform an evaluation test of a radar device equivalent to a case where an aircraft or the like is allowed to fly without actual flight. This apparatus receives a transmission signal from a radar device under test, and retransmits a pseudo target signal to the radar device under test based on the received transmission signal. Therefore, the pseudo target signal received by the device under test is also received with the same signal degradation as the transmission signal. No treatment for signal degradation can be found in the radar device under test.

  Patent Document 3 describes a radar device that detects the azimuth of a target by mixing a transmission signal and a reception signal, that is, converting it into a beat signal.

JP 11-052044 A JP-A-11-160418 JP 09-152478 A

As described above, in the conventional technique, in the reception system 50, the reflected signal reflected by the target is received by the antenna 14, and simply amplified by the intermediate frequency amplifier 23 via the duplexer 13, the high frequency amplifier 21, and the mixer 22. The I / Q detector 25 performs I / Q detection. The signal subjected to I / Q detection is directly converted into a digital signal by the A / D converter 25, and the amplitude of the signal reflected from the target is detected by the amplitude detector 27 by the amplitude detector 27. The RCS calculator 28 calculates a target radar reflection area (RCS) using the detected amplitude value. Therefore, no countermeasure is taken when the S / N ratio of the received signal is deteriorated.
Therefore, in the radar apparatus, if the S / N ratio of the received signal is deteriorated, the intended purpose cannot be achieved.
Since the techniques described in Patent Documents 1 to 3 cannot find technical considerations when the S / N ratio of the received signal has deteriorated, those techniques are also of the same type as the above-described conventional technique. There are specific issues.

  The present invention has been made in view of the above-described circumstances. Even when the S / N ratio of the received signal is deteriorated, the signal processing range (dynamic range) of the receiving system is expanded to improve the reception error of the received information. It is an object of the present invention to provide a receiving device and method thereof, a radar device and a receiving method thereof.

In order to solve the above problem, a first arrangement of the invention relates to a receiving apparatus for expanding the signal processing range, and receiving means for receiving a reception signal, a duplexer that will be connected to the receiving means, for co A plurality of systems including at least first and second reception processing systems, each of which includes a signal component detection unit and performs processing of an input signal for each different signal component of the signal, Reference signal input means for inputting a reference signal at a predetermined input position of at least the first reception processing system and the second reception processing system at a time different from the reception time of the reception signal by a predetermined value. When the amplitude value of the reception signal input from the first reception processing system is equal to or larger than the amplitude value of the reference signal, the amplitude phase value of the reception signal input from the first reception processing system is selected. On the other hand, the first Select the amplitude value of the received signals input from the reception processing system when less than the amplitude value of the reference signal, for selecting and outputting amplitude and phase values of the received signal inputted from said second receive processing system And an amplitude adjusting means is provided in the individual part of the second reception processing system, and except for the amplitude adjusting means, the individual part of the first reception processing system and the above part Both of the individual units of the second reception processing system are composed of the same components, and the selection unit is input from the reference signal input unit and output from the individual unit of the first reception processing system. Based on the detection amplitude and detection phase of the reference signal, the detection amplitude and detection phase of the reference signal output from the individual unit of the second reception processing system, and the gain of the amplitude adjusting means, Output from the individual part of the second reception processing system On corrected for strain differences in the amplitude phase values of the received signal, it is characterized in that outputs an amplitude phase value of the received signal output from the first or second reception processing system.

The second configuration of the invention relates to a radar apparatus for expanding the signal processing range, and receiving means for receiving a reception signal radiated transmission signal reflected back by the target from the radar, Ru is connected to the receiving means a shared portion consists of a separate unit that branches from the co for unit performs processing of the signal input comprises amplitude phase detection means for each said signal amplitude and phase, at least a first and a second reception processing system a plurality of systems consisting, during the dead time of the transmission signal, the reference signal input to enter at a predetermined input position location of the shared portion of the reference signal at least the first receiving processing system and a second reception processing system And when the amplitude value of the reception signal input from the first reception processing system is equal to or larger than the amplitude value of the reference signal, the amplitude phase value of the reception signal input from the first reception processing system is Select and output, on top When the amplitude value of the reception signal input from the first reception processing system is less than the amplitude value of the reference signal, the amplitude phase value of the reception signal input from the second reception processing system is selected. Output selection means, and an individual unit of the second reception processing system is provided with an amplitude adjustment unit, and except for the amplitude adjustment unit, the individual unit of the first reception processing system is provided. And the individual unit of the second reception processing system are composed of the same components, and the selection means is input from the reference signal input means and output from the individual part of the first reception processing system. Based on the detected amplitude and detected phase of the reference signal, the detected amplitude and detected phase of the reference signal output from the individual unit of the second reception processing system, and the gain of the amplitude adjusting means, From the individual parts of the first and second reception processing systems The strain differences in amplitude and phase values of the received signal on corrected to be, it is characterized by outputting the amplitude and phase values of the received signals output from the first or second reception processing system.

A third configuration of the present invention comprises a receiving means for receiving a received signal, a shared section connected to the receiving means, and an individual section branched from the shared section, and is input including a signal component detecting means. At least a reference signal at a time different from a reception time of the reception signal by a predetermined value, and a plurality of systems composed of at least first and second reception processing systems that perform signal processing for each different signal component of the signal A reference signal input means for inputting at a predetermined input position of the shared part of the first reception processing system and the second reception processing system, and a selection means; The individual unit is provided with amplitude adjusting means. Except for the amplitude adjusting means, the individual unit of the first reception processing system and the individual unit of the second reception processing system are the same in each component. A receiving method used by a receiving device comprising: When the amplitude value of the reception signal input from the first reception processing system is greater than or equal to the amplitude value of the reference signal to the selection means, the amplitude phase of the reception signal input from the first reception processing system While selecting and outputting a value, when the amplitude value of the received signal input from the first reception processing system is less than the amplitude value of the reference signal, the input from the second reception processing system Select and output the amplitude phase value of the received signal, at that time, input from the reference signal input means and output from the individual part of the first reception processing system, the detected amplitude and detected phase of the reference signal, Based on the detection amplitude and detection phase of the reference signal output from the individual unit of the second reception processing system, and the gain of the amplitude adjusting unit, from the individual unit of the first and second reception processing systems Amplitude phase value of the received signal to be output On which it is corrected strain differences, is characterized by outputting the amplitude and phase values of the received signals output from the first or second reception processing system.

According to a fourth aspect of the present invention, there is provided a receiving means for receiving a received signal that is reflected back from a transmission signal radiated from a radar, a shared section connected to the receiving means, and an individual branching from the shared section. A plurality of systems comprising at least first and second reception processing systems for processing the input signal including amplitude phase detection means for each amplitude and phase of the signal, and the dead signal of the transmission signal. A reference signal input means for inputting a reference signal at a predetermined input position of the shared part of at least the first reception processing system and the second reception processing system at the time, and a selection means; And an amplitude adjusting means is provided in the individual part of the second reception processing system, and except for the amplitude adjusting means, the individual part of the first reception processing system and the above part Shared with the individual parts of the second reception processing system According to a reception method used in a radar apparatus having the same components, when the amplitude value of the reception signal input from the first reception processing system is greater than or equal to the amplitude value of the reference signal to the selection unit, While selecting and outputting the amplitude phase value of the reception signal input from the first reception processing system, the amplitude value of the reception signal input from the first reception processing system is less than the amplitude value of the reference signal In this case, the amplitude and phase value of the received signal input from the second reception processing system is selected and output. At that time, input from the reference signal input means, Based on the detected amplitude and detected phase of the reference signal output from the unit, the detected amplitude and detected phase of the reference signal output from the individual unit of the second reception processing system, and the gain of the amplitude adjusting means And the first and The amplitude phase value of the reception signal output from the first or second reception processing system after correcting the system difference in the amplitude phase value of the reception signal output from the individual unit of the two reception processing systems Is output .

According to the present invention, the reference signal for selecting at least two receiving systems, and at least one of the at least two receiving systems is used for expanding the signal processing range for the received signal, and at least based on the reference signal. Since two reception systems are selected, the signal processing range (dynamic range) of the reception system can be expanded.
This expansion of the dynamic range improves the S / N ratio for a reflected signal having a small S / N ratio such as a reflected signal from a target with a small RCS or a target at a long distance. Therefore, it is possible to realize a significant improvement in the error that enters the RCS calculation result.

It is a block diagram which shows the electric constitution of the radar apparatus which is Embodiment 1 of this invention. It is a timing chart which shows the generation timing of the reference signal used with the radar device. It is explanatory drawing that a dynamic range expands by performing amplitude selection with the radar apparatus. It is a block diagram which shows the electric constitution of the radar apparatus which is Embodiment 2 of this invention. It is a block diagram which shows the electric constitution of the radar apparatus which is Embodiment 3 of this invention. It is a block diagram which shows the electric constitution of the conventional radar apparatus.

Embodiment 1

  1 is a block diagram showing the electrical configuration of a radar apparatus according to Embodiment 1 of the present invention, FIG. 2 is a timing chart showing the generation timing of a reference signal used in the radar apparatus, and FIG. 3 is the radar apparatus. It is explanatory drawing that a dynamic range expands by performing amplitude selection.

The radar apparatus 10 of this embodiment has an S / N ratio for such a reflected signal even if it is a reflected signal having a small S / N ratio such as a reflected signal from a target having a small RCS or a target at a long distance. The present invention relates to a device that can be improved to greatly improve the error that enters the RCS calculation result. This device comprises a transmission system 20 and a reception system 40 as shown in FIG.
The transmission system 20 includes a modulator 11, a transmitter 12, a transmission function unit of the duplexer 13, and an antenna 14.
Reception system 40 includes a receiving unit 40 _1, the two reception processing system, i.e., reception processing system 40 ₂ (hereinafter, the first referred to as a receiving system) and the reception processing system 40 ₃ (hereinafter, both the second receiving system Say).

Receiving means 40 ₁ is composed of a receiving unit of the antenna 14 and the duplexer 13. First receiving system 40 _2, and a separate portion _{40 21} and the common unit _{40 2,} the second reception system 40 ₃ have a common portion _{40 2} and ₃ and the individual units _{40 31.} The shared units 402, ₃ include a reference signal generator 30, a coupler 31, a high frequency amplifier 21, a mixer 22, a distributor 32, and an amplitude / phase correction / selector 38.
Individual portions _{40 21} of the reception processing system 40 ₂ is configured to have an intermediate frequency amplifier 23, I / Q amplifier 25, A / D converter (analog / digital converter) 26 and an amplitude phase detector 27, reception individual portions _{40 31} of the processing system 40 ₃ includes an intermediate frequency amplifier 33, amplifier 34, I / Q amplifier 35, a / D converter 36 and the amplitude phase detector 37.
The output of the amplitude / phase correction / selector 38 is connected to the RCS calculator 28 to constitute the entirety of this embodiment.

Each component of the transmission system 20 and the reception system 40 will be described.
First, the transmission system 20 will be described.
Since each component of the transmission system 20 is the same as the modulator 11, the transmitter 12, the duplexer 13, and the antenna 14 described in the section [Background Art], the description thereof will not be repeated. Receiving means 40 ₁ also, the antenna 14 described in the section of BACKGROUND ART, is the same as receiving unit of the duplexer 13 are not repeated description thereof.
Next, a description will be given of the first receiving system 40 ₂ of the reception system 40, an intermediate frequency amplifier 23, the high-frequency amplifier 21 and mixer 22, and the individual portions _{40 21} of the common portion _{40 2,3} I The / Q amplifier 25, the A / D converter 26, and the amplitude / phase detector 27 are the same as those described in the section [Background Art], and so are the same. Amplitude phase detector 27 in the reception processing system 40 ₂ supplies the value of the amplitude and phase to the amplitude and phase correction / selector 38.

Next, a description for the remaining components of the shared unit _{40 and third} reception processing system 40 ₂ and the reception processing system 40 _three of the receiving system 40. As shown in FIG. 2, the reference signal generator 30 generates a reference signal used for calibration of amplitude and phase during the dead time of the radar operation. The coupler 31 mixes the received signal branched and received by the duplexer 13 and the reference signal output from the reference signal generator 30 and transmits (mixes) them to the high-frequency amplifier 21. The distributor 32 distributes the signal output from the mixer 22 to the intermediate frequency amplifier 23 and the intermediate frequency amplifier 33.

Next, a description will be given of a second individual portion _{40 31} of the receiving system 40 _three of the receiving system 40. The intermediate frequency amplifier 33 performs the same function as the intermediate frequency amplifier 23. Amplification unit 34 is intended to provide gain to the amplified signal at the intermediate frequency amplifier 33, its gain, dynamic range of the A / D converter 26 and the A / D converter 36 is set so as to overlap The The I / Q detector 35 performs I / Q detection of the input signal.
Similar to the A / D converter 26, the A / D converter 36 converts an analog signal into a digital signal. Amplitude phase detector 37, similar to the amplitude phase detector 27 detects the amplitude and phase values of the second reception system 40 ₃ two came transmitted through the signal.
Then, amplitude phase correction / selector 38 that terminates in the first reception system 40 ₂ and the second receiving system 40 _3, a reference signal of the signal output from the amplitude phase amplifier 27 and the amplitude phase amplifier 37 Based on the amplitude value of the reference signal output from the generator 30, the system difference of the receiving system including the amplifier 34 is corrected.

Next, the operation of this embodiment will be described with reference to FIGS.
The signal output from the modulator 11 is radiated toward the target via the transmitter 12, the duplexer 13, and the antenna 14.
The reflected signal that is reflected by the target and returned is received by the antenna 14 and input to the coupler 31 through the duplexer 13. The signal is mixed with the reference signal input from the reference signal generator 30 at the timing described above by the coupler 31 and then input to the distributor 32 via the high frequency amplifier 21 and the mixer 22.

Signals distributed by the distributor 32 is supplied to the individual units _{40 21} and the individual units _{40 31} of two systems described above (the first receiving system 40 ₂ and the second reception system 40 _3). The signal is first input to the intermediate frequency amplifier 23 and the intermediate frequency amplifier 33. Similar to the intermediate frequency amplifier 23, the intermediate frequency amplifier 33 amplifies the input signal. The signal amplified by the intermediate frequency amplifier 33 is given a gain in the amplifier 34 so as to overlap the dynamic range of the A / D converter 25 and the A / D converter 35 arranged in the subsequent stage. That is, a process for expanding linearity with respect to the input signal is performed and output.

The signal given gain is subjected to I / Q detection of the signal output from the amplifier 34 in the I / Q detector 35. At this time, the output signal amplified by the intermediate frequency amplifier 23 is also I / Q-detected by the I / Q detector 25 in the same manner as in the prior art.
The signals of each system that are detected and output are converted into digital signals by A / D converters 26 and 36, respectively, and these digital signals are input to the corresponding amplitude phase detector 27 and amplitude phase detector 37. Then, the amplitude and phase of the signal input by each detector are detected.
Respective amplitudes and phases detected by the amplitude phase detector 27 and the amplitude phase detector 37 are input to the amplitude phase correction / selector 38.

The amplitude phase correction / selector 38 corrects the system difference of the receiving system including the amplifier 34 based on the amplitude and phase of the reference signal output from the reference signal generator 30 out of the amplitude of the input signal. Make a selection.
The systematic difference is corrected as follows. Detecting the amplitude of the reference signal in the first reception system (reception processing system) 40 ₂ of the amplitude phase detector 27 that does not include the amplifier 34 Ma (dB), the detected phase as Pa (deg), the gain of the amplifier 34 A (dB), the detection amplitude of the reference signal in the amplitude phase detector 37 of the second reception system (reception processing system) 40 ₃ comprising amplifier 34 Mb (dB), when the detected phase and Pb (deg), an amplifier 34 second correction value of the receiving system 40 ₃ comprising the formula (1).
[Formula 1]
Amplitude correction value = (Ma + A) −Mb
Phase correction value = Pa−Pb
Therefore, the measurement result of the second reception system 40 ₃ including an amplifier 34, by adding the correction value to the result of the amplitude phase detector 37, it is possible to correct the strain differences.

The selection of the system in the amplitude phase correction / selector 38 will be described with reference to FIG. 3. When the amplitude value input from the amplitude phase detector 27 is equal to or larger than the amplitude value of the reference signal, (b) in FIG. As shown in FIG. 5, the amplitude phase value input from the first reception system 40 ₂ , that is, the amplitude phase detector 27 is employed. On the other hand, when the amplitude value input from the amplitude phase detector 27 is less than the amplitude value of the reference signal, the second receiving system 40 ₃ , that is, the amplitude phase, as shown in FIG. The amplitude phase value input from the detector 37 is employed. By making this selection, the influence of the system difference is eliminated, and the dynamic range is expanded as shown in FIG.
Therefore, even when the S / N ratio is small, such as a reflected signal from a target having a small RCS or a long-distance target, the S / N ratio of the reflected signal can be improved by adopting the above-described new system. The error of the RCS calculation result can be improved.

Thus, according to this embodiment, in the radar apparatus, the reference signal for selecting the first reception system or the second reception system, the second reception system for expanding the dynamic range for the reception signal, Since the selection between the conventional first receiving system and the second receiving system for expanding the dynamic range is performed based on the reference signal, the dynamic range of the radar receiving system can be expanded.
This expansion of the dynamic range improves the S / N ratio for a reflected signal having a small S / N ratio such as a reflected signal from a target with a small RCS or a target at a long distance. Therefore, it is possible to realize a significant improvement in the error that enters the RCS calculation result.

Embodiment 2

FIG. 4 is a block diagram showing an electrical configuration of a radar apparatus according to Embodiment 2 of the present invention.
The configuration of this embodiment differs greatly from that of Embodiment 1 in that a reference signal is inserted in the dead time of the transmission signal, the reference signal is branched by a coupler, and mixed with the received signal. Similarly, it is distributed to the two receiving systems.
That is, as shown in FIG. 4, the radar apparatus 10A of this embodiment includes a transmission system 20A to which a modulator 11a for inserting a reference signal into a dead time of a transmission signal and a coupler 31a are added, and a reference signal generation. Instead of the reference signal output from the coupler 30, the reference signal branched by the coupler 31a and the reception signal branched by the duplexer 13 are mixed by the coupler 31, and the configuration after the coupler 31 is the same as that of the first embodiment. The entire structure is composed of the receiving system 40A.
Since the configuration of the present embodiment other than this configuration is the same as that of the first embodiment, the description of each configuration will be omitted.

Next, the operation of this embodiment will be described with reference to FIG.
The operation of this embodiment is as follows: a reference signal is inserted into the dead time of the transmission signal in the modulator 11a and input to the coupler 31a via the transmitter 12, and the reference signal is transmitted in the coupler 31a. Branches out of the signal. The same as the first embodiment, except that the branched reference signal and the received signal from the duplexer 13 are mixed by the coupler 31. Therefore, the signal processing after the coupler 31 is exactly the same as in the first embodiment.
Therefore, the basic effect obtained in this embodiment is the same as that of the first embodiment except for the input portion of the reference signal.

Embodiment 3

FIG. 5 is a block diagram showing an electrical configuration of a radar apparatus according to Embodiment 3 of the present invention.
The configuration of this embodiment is greatly different from that of the first embodiment in that a mixed signal of a reception signal and a reference signal is distributed to three reception systems.
That is, the radar apparatus 10B of this embodiment is characterized in that the receiving system 40B is configured as follows, as shown in FIG. The receiving system 40B includes the following three receiving systems.

The shared units 40 ₂ , ₃ , ₄ of the first reception system (reception processing system) 40 ₂ , the second reception system (reception processing system) 40 _3, and the third reception system (reception processing system) 40 ₄ are the reference The signal generator 30, the coupler 31, the high frequency amplifier 21, the mixer 22, and the distributor 32 are configured. Then, the first receiving system 40 _second individual portion 40 ₂₁ is the same as the first receiver system 40 ₂ of the first and second embodiments, i.e., receiving a first division output of the distributor 32 intermediate A frequency amplifier 23, an I / Q amplifier 25, an A / D converter 26, and an amplitude phase amplifier 27 are included.
Shared portion _{40 3, 4} of the second reception system 40 ₃ and the first reception system 40 ₄ comprises a distributor 32b. The distributor 32 b receives the second distribution output of the distributor 32.
Individual portions 40 ₃₁ of the second receiver system 40 ₃ is the same as the second receiving system 40 ₃ of the first and second embodiments, i.e., an intermediate frequency amplifier for receiving the first division output of divider 32b 33, an amplifier 34, an I / Q amplifier 35, an A / D converter 36, and an amplitude phase amplifier 37.

Third discrete portions _{40 41} of the receiving system 40 _4, intermediate frequency amplifier 33b which receives the second division output of divider 32b, amplifier 34b, I / Q amplifier 35b, A / D converter 36b and amplitude-phase amplifier 37b It is comprised.
Then, output signals of the amplitude phase amplifier 27, the amplitude phase amplifier 37, and the amplitude phase amplifier 37b are input to the amplitude phase correction / selector 38b to constitute the entire receiving system 40B.

Amplifier 34,34b provided in the second and third reception system ₄₀ 3, 40 _4, first, second and third receiving system _{40 2,} 40 3, 40 ₄ is provided is A / D converted into Gain is applied to the input signal to overlap the dynamic range of the units 26, 36, 36b. The amplitude / phase correction / selector 38 corrects the amplitude and phase of the received signal input to the first, second, and third receiving systems 40 ₂ , 40 ₃ , and 40 ₄ and corrects the amplitude based on the amplitude of the reference signal. The amplitude phase value of any one of the first, second and third reception systems is selected.
Then, the RCS calculator 28 calculates the RCS based on the amplitude phase value selected by the amplitude phase correction / selector 38.
Since the configuration of the present embodiment other than this configuration is the same as that of the first embodiment, the description of each configuration will be omitted.
Next, the operation of this embodiment will be described with reference to FIG.
The operation of this embodiment in the following points, namely, except for the signal processing in the third reception system 40 ₄ are the same as in Embodiment 2. Thus, functions to expand the dynamic range of the third reception system 40 _4, the receiving system 40B Embodiments 1 and 2 above.
Therefore, the basic effects obtained in this embodiment are not different from those in the first and second embodiments. Even in a situation where the S / N ratio of the reflected signal from the target is even worse, an error entering the RCS calculation result can be suppressed.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and the design does not depart from the gist of the present invention. These changes are included in the present invention.
For example, the reference signal may be input at any signal propagation position (input position) before the A / D conversion circuits 26, 36, and 36 _b in the reception systems 40 ₂ , 40 ₃ , and 40 ₄ . At that time, the propagation time of the signal is taken into consideration. Alternatively, the signals may be mixed with the signals output from the A / D conversion circuits 26, 36, and 36 and input to the amplitude / phase detectors 27, 37, and 37b separately.
It is possible to expand the dynamic range of the receiving system by adding a distributor.
In any of the embodiments, the selection using the amplitude of the reference signal is shown, but other signal components useful for the selection may be used.
The reference signal input means may be provided for each reception system (reception processing system).

  The receiving apparatus and method and the radar apparatus and receiving method disclosed herein are various receivers that want to improve the receiving error by expanding the dynamic range of the receiving system even when the S / N ratio of the received signal is deteriorated. Can be used in the device.

10 Receiving device 11, 11a Modulator (part of transmission system, part of reference signal input means)
12 Transmitter (part of transmission system)
13 Duplexer (part of transmission system, part of reception means, signal separation means)
14 Antenna (the remainder of the transmission system, the remainder of the receiving means)
20, 20A transmission system 21 high-frequency amplifier (a part of the shared portion of the first, second and third reception systems)
22 mixer (a part of the shared part of the first, second and third receiving systems)
23 Intermediate frequency amplifier (part of the individual part of the first receiving system)
25 I / Q amplifier (part of individual part of first receiving system)
26 A / D converter (part of individual part of first receiving system)
27 Amplitude amplifier (part of individual part of first receiving system)
28 RCS calculator 30 Reference signal generator (part of shared part of first and second receiving systems, reference signal input means, reference signal output part)
31, 31a Coupler (remaining portion of shared portion of first, second and third receiving systems, remaining portion of reference signal input means, mixing means)
32, 32b Distributor (part of individual part of second reception system, part of individual part of third reception system, distribution means)
33, 33b Intermediate frequency amplifier (part of individual part of second receiving system, part of individual part of third receiving system)
34, 34b Amplifier (part of individual part of second receiving system, part of individual part of third receiving system)
35, 35b I / Q amplifier (part of individual part of second receiving system, part of individual part of third receiving system, amplitude adjusting means)
36, 36b A / D converter (part of individual part of second receiving system, part of individual part of third receiving system)
37, 37b Amplitude phase detector (part of individual part of second reception system, part of individual part of third reception system, amplitude phase detection means)
38 Amplitude phase correction / selector (selection means)
40, 40B Receiving system 40 ₁ Receiving means 40 ₂ First receiving system 40 ₃ Second receiving system 40 ₄ Third receiving system 40 _{2, 3} Shared part 40 of the first and second receiving systems 40 _{2, 3, 4} Common part of the first, second and third reception systems 40 ₂₁ Individual part of the first reception system 40 ₃₁ Individual part of the second reception system 40 ₄₁ Individual part of the third reception system

Claims (28)

Receiving means for receiving a received signal;
A duplexer that will be connected to the receiving means consists of a separate unit that branches from the co vision portion, performed for each different signal components of processing the signals of the signal input comprises a signal component detecting means, at least first and A plurality of systems comprising a second reception processing system;
Reference signal input means for inputting a reference signal at a predetermined input position of at least the first reception processing system and the second reception processing system at a time different from the reception time of the reception signal by a predetermined value. When,
When the amplitude value of the reception signal input from the first reception processing system is equal to or larger than the amplitude value of the reference signal, the amplitude phase value of the reception signal input from the first reception processing system is selected. On the other hand, when the amplitude value of the reception signal input from the first reception processing system is less than the amplitude value of the reference signal, the amplitude phase of the reception signal input from the second reception processing system Selection means for selecting and outputting values , and
The individual unit of the second reception processing system is provided with an amplitude adjusting unit. Except for the amplitude adjusting unit, the individual unit of the first reception processing system and the individual unit of the second reception processing system are provided. Each part is composed of the same parts, and
The selection means is input from the reference signal input means and is output from the individual part of the first reception processing system, and from the individual part of the second reception processing system. Based on the detection amplitude and detection phase of the output reference signal and the gain of the amplitude adjustment means, the amplitude phase value of the reception signal output from the individual units of the first and second reception processing systems A reception apparatus that outputs an amplitude phase value of the reception signal output from the first or second reception processing system after correcting a system difference . The reference signal, claims, characterized in that the output from at least the first receiving processing system and Tei Ru reference signal output unit or the transmission system of the modulator is provided in the common portion of the second reception processing system The receiving device according to 1. The signal component output from the signal component detecting means, receiving apparatus according to claim 1, characterized in that the amplitude and phase of the signal. The shared unit of at least the first reception processing system and the second reception processing system includes the reference signal output from the reference signal output unit and the reception signal output from the signal separation unit of the reception unit. receiving apparatus according to claim 2, characterized in that it have a mixing means for mixing and. Said shared portion of at least the first receiving processing system and a second reception processing system is output from the previous SL transmission system modulator, the reference signal is branched by the first branching means of the transmission system and the receiving apparatus according to claim 2, characterized in that it have a mixing means for mixing the received signal is branched by the second branching means of the transmission system. The shared unit of at least the first reception processing system and the second reception processing system is configured to output a mixed signal output from the mixing unit to at least the first reception processing system and the second reception processing system. 6. The receiving apparatus according to claim 4 , further comprising distribution means for distributing to the individual units. Wherein the amplitude adjusting means causes said second overlap the dynamic range of the analog / digital converter provided reception processing dynamic range of the analog / digital converter provided in system and the first reception processing system gain, receiving apparatus according to claim 1, wherein the a second receive processing system is provided giving the signal input to the analog / digital converter amplifier. Receiving means for receiving a received signal which is reflected by the target and returned from the transmission signal emitted from the radar;
A duplexer that will be connected to the receiving means consists of a separate unit that branches from the co for unit performs processing of the signal input comprises amplitude phase detection means for each said signal amplitude and phase, at least a first and A plurality of systems comprising a second reception processing system;
During the dead time of the transmission signal, a reference signal input means for entering a predetermined input position location of said shared portion of the reference signal at least the first receiving processing system and a second reception processing system,
When the amplitude value of the reception signal input from the first reception processing system is equal to or larger than the amplitude value of the reference signal, the amplitude phase value of the reception signal input from the first reception processing system is selected. On the other hand, when the amplitude value of the reception signal input from the first reception processing system is less than the amplitude value of the reference signal, the amplitude phase of the reception signal input from the second reception processing system Selection means for selecting and outputting values, and
The individual unit of the second reception processing system is provided with an amplitude adjusting unit. Except for the amplitude adjusting unit, the individual unit of the first reception processing system and the individual unit of the second reception processing system are provided. Each part is composed of the same parts, and
The selection means is input from the reference signal input means and is output from the individual part of the first reception processing system, and from the individual part of the second reception processing system. Based on the detection amplitude and detection phase of the output reference signal and the gain of the amplitude adjustment means, the amplitude phase value of the reception signal output from the individual units of the first and second reception processing systems A radar apparatus, which corrects a system difference and outputs an amplitude phase value of the reception signal output from the first or second reception processing system . The reference signal, claims, characterized in that the output from at least the first receiving processing system and the reference signal generator or the transmission system of the modulator Ru Tei provided in the common portion of the second reception processing system 8. The radar device according to 8 . The shared unit of at least the first reception processing system and the second reception processing system includes the reference signal input from the reference signal generator and the reception signal output from the duplexer of the reception means. mixing the radar apparatus according to claim 9, wherein that it have a coupler for. Said shared portion of at least the first receiving processing system and a second reception processing system is output from the transmit system modulator, the reference signal is branched by the first branching means of the transmission system and the transmission system second radar device according to claim 9, characterized in that to have a coupler for mixing the received signal is branched at the branch means. The shared unit of at least the first reception processing system and the second reception processing system is configured to output a mixed signal output from the coupler as at least the individual of the first reception processing system and the second reception processing system. The radar apparatus according to claim 10 , further comprising a distribution unit that distributes the signals to the unit. Wherein the amplitude adjusting means causes said second overlap the dynamic range of the analog / digital converter provided reception processing dynamic range of the analog / digital converter provided in system and the first reception processing system gain, radar apparatus according to claim 8, wherein the a second receive processing system is provided giving the signal input to the analog / digital converter amplifier. The radar apparatus according to any one of claims 8 to 13 , wherein a radar reflection cross section calculation unit is connected to the selection unit. Receiving means for receiving a received signal;
A shared unit connected to the receiving unit; and an individual unit branched from the shared unit, and includes a signal component detecting unit and processes an input signal for each different signal component of the signal. A plurality of systems comprising a second reception processing system;
Reference signal input means for inputting a reference signal at a predetermined input position of at least the first reception processing system and the second reception processing system at a time different from the reception time of the reception signal by a predetermined value. When,
And a selection means,
The individual unit of the second reception processing system is provided with an amplitude adjusting unit. Except for the amplitude adjusting unit, the individual unit of the first reception processing system and the individual unit of the second reception processing system are provided. The unit is a receiving method used in a receiving apparatus having the same configuration and each part,
In the selection means,
When the amplitude value of the reception signal input from the first reception processing system is equal to or larger than the amplitude value of the reference signal, the amplitude phase value of the reception signal input from the first reception processing system is selected. On the other hand, when the amplitude value of the reception signal input from the first reception processing system is less than the amplitude value of the reference signal, the amplitude phase of the reception signal input from the second reception processing system is output. Select a value and output it.
Detection amplitude and detection phase of the reference signal input from the reference signal input means and output from the individual unit of the first reception processing system, and the reference output from the individual unit of the second reception processing system Based on the detected amplitude and detected phase of the signal and the gain of the amplitude adjusting means, the systematic difference in the amplitude phase value of the received signal output from the individual unit of the first and second receiving processing systems is corrected. And receiving the amplitude and phase values of the reception signal output from the first or second reception processing system . The reference signal is output from a reference signal output unit or a transmission system modulator provided in the shared unit of at least the first reception processing system and the second reception processing system. 15. A receiving method of the receiving device according to 15 . 16. The receiving method according to claim 15 , wherein the signal component output from the signal component detecting means is the amplitude and phase of the signal. The reference signal output from the reference signal output unit and the received signal output from the signal separating means of the receiving means are shared by at least the first reception processing system and the second reception processing system. The receiving method according to claim 16 , wherein mixing is performed by mixing means provided in the unit . The feed is output from the signal system of the modulator, and the reference signal is branched by the first branching means of the transmission system, the received signal are to be branched by the second branching means of the transmission system, at least the 17. The receiving method of a receiving apparatus according to claim 16 , wherein the first receiving processing system and the second receiving processing system are mixed by a mixing means provided in the common unit. The mixed signal mixed by the mixing unit of the shared unit is distributed to at least the individual units of the first reception processing system and the second reception processing system by a distribution unit provided in the shared unit. 20. A receiving method for a receiving apparatus according to claim 18, wherein the receiving method is used. It said amplitude adjustment means, overlaps a dynamic range of the second receive processing system dynamic range of the analog / digital converter provided in an analog / digital converter provided in the first reception processing system the gain to the reception method of claim 15 reception device, wherein the a second receive processing system the provided Ru applied to the signal input to the analog / digital converter amplifier. Receiving means for receiving a received signal which is reflected by the target and returned from the transmission signal emitted from the radar;
A shared unit connected to the receiving unit; and an individual unit branched from the shared unit, and includes an amplitude phase detecting unit and processes an input signal for each amplitude and phase of the signal, at least first and A plurality of systems comprising a second reception processing system;
A reference signal input means for inputting a reference signal at a predetermined input position of the shared part of at least the first reception processing system and the second reception processing system at the dead time of the transmission signal;
And a selection means,
The individual unit of the second reception processing system is provided with an amplitude adjusting unit. Except for the amplitude adjusting unit, the individual unit of the first reception processing system and the individual unit of the second reception processing system are provided. The unit is a receiving method used in a radar apparatus having the same configuration and each part,
In the selection means,
When the amplitude value of the reception signal input from the first reception processing system is equal to or larger than the amplitude value of the reference signal, the amplitude phase value of the reception signal input from the first reception processing system is selected. On the other hand, when the amplitude value of the reception signal input from the first reception processing system is less than the amplitude value of the reference signal, the amplitude phase of the reception signal input from the second reception processing system is output. Select a value and output it.
Detection amplitude and detection phase of the reference signal input from the reference signal input means and output from the individual unit of the first reception processing system, and the reference output from the individual unit of the second reception processing system Based on the detected amplitude and detected phase of the signal and the gain of the amplitude adjusting means, the systematic difference in the amplitude phase value of the received signal output from the individual unit of the first and second receiving processing systems is corrected. In addition, a method for receiving a radar apparatus, comprising: outputting an amplitude phase value of the reception signal output from the first or second reception processing system . The reference signal is output from a reference signal generator or a transmitter modulator provided in at least the shared part of the first reception processing system and the second reception processing system. 23. A receiving method of the radar device according to 22 . And the reference signal inputted from the criteria signal generator, and the received signal output from the duplexer of the receiving means, at least the first receiving processing system and the common portion of the second reception processing system 24. The method of receiving a radar device according to claim 23 , wherein mixing is performed by a coupler provided in the radar device. The feed is output from the signal system of the modulator, and the reference signal is branched by the first branching means of the transmission system, the received signal are to be branched by the second branching means of the transmission system, at least the 24. The method for receiving a radar device according to claim 23 , wherein the first reception processing system and the second reception processing system are mixed by a coupler provided in the common unit. The mixed signal mixed by the mixing unit of the shared unit is distributed to at least the individual units of the first reception processing system and the second reception processing system by a distribution unit provided in the shared unit. 26. The receiving method of the receiving apparatus according to claim 24 or 25 . It said amplitude adjustment means, overlaps a dynamic range of the second receive processing system dynamic range of the analog / digital converter provided in an analog / digital converter provided in the first reception processing system reception method of claim 22 radar system, wherein the gain to a second receive processing system the provided Ru applied to the signal input to the analog / digital converter amplifier. Receiving method of a radar apparatus according to any one of claims 22 to 27, characterized in that RCS is calculated based on the amplitude selected and phase.

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