JP2013007693A - Search receiving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a search receiving device suitable for radio wave monitoring, which can efficiently detect appearance frequencies without detecting frequencies outside the scope of monitoring (e.g. low appearance frequencies, etc.).SOLUTION: An appearance frequency calculator 6 calculates an appearance frequency of received signals which exceed a threshold set by a threshold setting unit 12 on the basis of an appearance frequency calculating condition set by a calculation condition setting unit 13. A frequency setting unit 7 sets frequencies of communication waves which a receiver 8 can receive on the basis of appearance frequency data calculated by the appearance frequency calculator 6.

Description

  The present invention relates to a search receiver that sequentially detects (searches) the frequency of a communication wave to be received in order to monitor the frequency of illegal radio waves and the like.

In the conventional technology, when performing search reception, since it is determined whether to detect the appearance frequency (that is, the reception signal frequency of the communication wave received by the antenna) based on the reception level of the communication wave to be received, All appearance frequencies above the set reception level will be detected.
That is, even for a communication wave that does not require detection outside the monitoring target, if the level of the received signal is equal to or higher than the set level, all the frequencies are detected.
In order not to detect all appearance frequencies above the set reception level, it is necessary to set (register) in advance the frequencies of communication waves that are not to be detected.
Therefore, in a search reception apparatus used in a conventional radio wave monitoring system or the like, for example, it is set in advance so as not to detect frequencies of television broadcast waves that are not monitored.

Patent Document 1 (Japanese Patent Application Laid-Open No. 2010-133766) includes “a monitoring receiver that outputs spectrum data of received radio waves (received communication waves), and an electrolysis obtained from spectrum data in a probe signal processor. A radio monitoring device that detects the frequency of the actually received radio wave (communication wave) based on the intensity and the amount of frequency deviation, corrects the measurement frequency, and sets the corrected measurement frequency for the probe receiver. Are listed.
In the conventional radio wave monitoring apparatus as described in Patent Document 1, it is not possible to efficiently search the frequencies of many received communication waves without omission, and the frequency to be detected is lost.

JP 2010-133766 A

  In the conventional method of detecting the appearance frequency of a reception level above a certain level when performing search reception, even if “set to not detect a specific frequency”, the signal of the same signal due to the modulation bandwidth and side lobe There is a problem that continuous detection occurs, and detection of an appearance frequency that changes every moment is missed. This problem becomes more prominent as the frequency range to be searched becomes wider.

The present invention has been made to solve such problems. In radio wave monitoring, even when a frequency search is received from a wide frequency range, detection loss of received frequencies is reduced. An object of the present invention is to obtain a search receiver capable of efficiently detecting a frequency.
Note that “reducing detection missed frequencies to be received” means that “as many frequencies as possible can be received by efficiently searching (searching or detecting) the frequency (appearance frequency) received by the receiver”. To do it.

A search reception apparatus according to the present invention is a search reception apparatus including a receiver that receives a broadband communication wave and a controller that controls the receiver. The receiver includes a distribution unit, a broadband reception, and the like. Unit, spectrum generation unit, threshold detection unit, detection data storage unit, appearance frequency calculation unit, frequency setting unit, reception unit and demodulation unit,
The controller includes a frequency range setting unit, a display unit, a threshold setting unit, a calculation condition setting unit, a demodulation setting unit, and a reproduction unit,
The distributing unit distributes the received broadband communication wave into two, inputs the distributed one communication wave to the broadband receiving unit, and inputs the distributed other communication wave to the receiving unit, and the frequency range setting unit Sets the frequency range of the reception frequency received by the broadband receiving unit, and the broadband receiving unit converts the broadband communication wave input from the distributing unit into an IF signal, and then AD-converts the converted IF signal Digital spectrum, the spectrum generator generates a spectrum of a broadband communication wave received by the broadband receiver, inputs the generated spectrum to the threshold detector, and the threshold detector detects the spectrum generator And the threshold set by the threshold setting unit are detected, a reception frequency of a signal level exceeding the set threshold is detected, and the detection data storage unit is the threshold The information of the received signal detected by the output unit is accumulated, and the appearance frequency calculation unit receives the signal exceeding the threshold set by the threshold setting unit based on the appearance frequency calculation condition set by the calculation condition setting unit. The appearance frequency of the signal is calculated, the frequency setting unit sets the frequency of the communication wave that can be received by the receiving unit based on the appearance frequency data calculated by the appearance frequency calculating unit, and the receiving unit After the signal input from the unit is converted to an IF signal, it is converted into digital data by AD conversion, the converted digital is input to the demodulator, and the demodulator is set to the demodulation scheme set by the demodulation setting unit. Then, the encoded data is demodulated, and the reproducing unit reproduces the data demodulated by the demodulating unit.

  According to this invention, the appearance frequency calculation unit calculates the appearance frequency of the received signal that exceeds the threshold set by the threshold setting unit based on the appearance frequency calculation condition set by the calculation condition setting unit, and sets the frequency setting. The unit sets the frequency of the communication wave that can be received by the receiving unit based on the appearance frequency data calculated by the appearance frequency calculating unit. Therefore, an unnecessary frequency (that is, a frequency that is not monitored) is received during search reception. It is possible to efficiently detect the frequency without detecting the frequency having a low appearance frequency.

2 is a diagram illustrating a configuration of a search reception apparatus according to Embodiment 1. FIG. 4 is a flowchart for explaining the operation of the main part of the search reception device according to the first embodiment. 6 is a diagram illustrating a configuration of a search reception apparatus according to Embodiment 2. FIG. FIG. 10 is a diagram illustrating a configuration of a search reception device according to a third embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the drawings, the same reference numerals represent the same or equivalent ones.
Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a search reception apparatus according to Embodiment 1 of the present invention.
As shown in FIG. 1, the search receiving apparatus according to the present embodiment includes a receiver 100 for searching and receiving a broadband communication wave, and a demodulation for controlling the operation of the receiver 100 and outputting from the receiver 100. And a controller 200 for reproducing the recorded data.
The receiver 100 includes a distribution unit 1, a broadband reception unit 2, a spectrum generation unit 3, a threshold detection unit 4, a detection data storage unit 5, an appearance frequency calculation unit 6, a frequency setting unit 7, a reception unit 8, and a demodulation unit 9. Is provided.
Further, the controller 200 is provided with a frequency range setting unit 10, a display unit 11, a threshold setting unit 12, a calculation condition setting unit 13, a demodulation setting unit 14, and a reproduction unit 15.

The distribution unit 1 provided in the receiver 100 distributes the wideband communication wave received by the antenna into two, inputs the distributed one communication wave to the wideband reception unit 2, and receives the other distributed communication wave Input to part 8.
The frequency range setting unit 10 provided in the controller 200 sets the frequency range of the reception frequency received by the broadband receiving unit 2 of the receiver 100. The frequency range to be monitored is arbitrarily set by the user.

The broadband receiving unit 2 provided in the receiver 100 converts the received broadband communication wave, which is one of the communication waves distributed by the distribution unit 1, into an IF signal, and then AD converts the converted IF signal to digital Obtain data (eg, IQ data). Then, the obtained digital data (IQ data) is output to the spectrum generation unit 3.
Note that by converting an analog signal (IF signal) into digital data (IQ data), handling (signal processing, accumulation, etc.) in a digital device can be facilitated.

The spectrum generation unit 3 performs FFT processing (fast Fourier processing) on the signal obtained from the broadband receiving unit 2 to generate a spectrum of the received broadband communication wave. Then, the generated spectrum is input to the threshold detection unit 4.
The spectrum of the broadband communication wave output from the spectrum generation unit 3 is input to the display unit 11 of the controller 200 and displayed on the display screen of the display unit 11.

The user visually confirms the spectrum (that is, the signal level of each reception frequency) displayed on the display screen of the display unit 11 while visually checking whether the spectrum is a frequency that requires detection or an unnecessary frequency. It is determined whether the spectrum is
Then, the user uses the threshold setting unit 12 to set the threshold so that the receiving unit 8 does not detect “frequency determined to be a frequency of a spectrum that is unnecessary to detect”.
The threshold detection unit 4 of the receiver 100 compares the spectrum of the broadband communication wave input from the spectrum generation unit 3 (the signal level of each reception frequency) with the threshold set by the threshold setting unit 12, and sets the set threshold Detect a reception frequency with a signal level exceeding.
The detection data accumulation unit 5 accumulates “information of a received signal exceeding the threshold (for example, frequency information, signal level information, etc.)” set by the threshold setting unit 12.
The “information of the received signal exceeding the threshold value” accumulated in the detection data accumulation unit 5 is input to the appearance frequency calculation unit 6 of the receiver 100.

The calculation condition setting unit 13 of the controller 200 gives the appearance frequency calculation unit 6 an appearance frequency calculation condition (for example, the appearance frequency of the frequency F1 is X times or more in the past 1 hour, or the appearance of the frequency F1 in the past 1 hour. The frequency is Y times or less, etc.).
The appearance frequency calculation unit 6 of the receiver 100 calculates the appearance frequency of the received signal exceeding the “threshold value set by the threshold setting unit 12” based on the appearance frequency calculation condition set by the calculation condition setting unit 13. Do.
For example, the appearance frequency is calculated by counting the frequency of the received signal exceeding the threshold from the accumulated data in the past one hour.

By preparing a database (frequency information, signal level information, appearance time, etc.) in advance in the appearance frequency calculation unit 6, the application frequency can be quickly calculated under the application frequency calculation conditions as described above. The database also manages frequency information, signal level information, appearance time, and the like.
As will be described later, by repeating the filing frequency calculation conditions, it is possible to detect “frequency signals with extremely low noise and appearance frequency” or “frequency signals that appear constantly such as television broadcasts” ( That is, it can be excluded from the monitoring target).

The frequency setting unit 7 lists the frequencies calculated by the appearance frequency calculating unit 6 (that is, the frequencies of received signals having a level exceeding the threshold set by the threshold setting unit 12) and sets them in the receiving unit 8 ( sign up. That is, the frequency setting unit 7 sets the frequency of the communication wave that can be received by the receiving unit 8 based on the frequency data (that is, the appearance frequency data) calculated by the appearance frequency calculating unit 6.
Thereby, the reception unit 8 can receive only the communication wave (reception signal) having the frequency set by the frequency setting unit 7.

The receiving unit 8 receives the other communication wave distributed by the distributing unit 1 and receives a communication wave having a frequency set by the frequency setting unit 7.
The receiving unit 8 converts the received signal into an IF signal (down-conversion), converts the received signal into digital data by AD conversion, and inputs the data converted to digital data by AD conversion to the demodulation unit 9.
The demodulator 9 demodulates “encoded data” using the demodulation method set by the demodulation setting unit 14 of the controller 200. The data demodulated by the demodulator 9 is reproduced by the reproduction unit 15 of the controller 200 and output from the reproduction unit 15 as reproduction data.

FIG. 2 is a flowchart for explaining the operation of the main part of the search reception apparatus according to the first embodiment.
First, the threshold value setting unit 12 sets a threshold value for the spectrum of the broadband communication wave input from the spectrum generation unit 3 so that the reception unit 8 does not detect a reception frequency of an unnecessary spectrum. (Step S101)
Next, the threshold detection unit 4 compares the spectrum of the broadband communication wave input from the spectrum generation unit 3 (the signal level of each reception frequency) with the threshold set by the threshold setting unit 12, and sets the set threshold. The frequency of the received signal having a higher level is detected. (Step S102)
In step S102, when the signal level of the detected reception signal is not higher than the set threshold value, the process ends.

When the signal level of the detected reception signal is higher than the set threshold value, information of the reception signal (for example, detection data such as frequency information and signal level information) is stored in the detection data storage unit 5. (Step S103)
Next, the calculation condition setting unit 13 sets an appearance frequency calculation condition for the appearance frequency calculation unit 6. (Step S104)
For example, the appearance frequency calculation unit 6 determines whether or not the appearance frequency is X times or more in the past hour (step S105). If the appearance frequency is X times or more, the appearance frequency is subsequently determined in the past hour. Is less than Y times (step S106). If the appearance frequency is less than Y times, the process proceeds to the next step S107.
If the appearance frequency is not X times or more in step S105, and if the appearance frequency is not less than Y times in step S106, the process ends.

If the appearance frequency is less than Y times in step S106, the frequency setting unit 7 sets the frequency of the communication wave that can be received by the reception unit 8 based on the frequency data (appearance frequency data) calculated by the appearance frequency calculation unit 6. To do. (Step S107)
As a result, the receiving unit 8 can receive only the communication wave having the set frequency, and can perform search reception. (Step S108)

In the present embodiment, detection data having a level higher than a set threshold value is accumulated in the detection data accumulation unit 5, and the appearance frequency calculation unit 6 calculates the appearance frequency using the accumulated data.
Furthermore, the appearance frequency calculation unit 6 calculates the appearance frequency of the received signal at a level exceeding the threshold set by the threshold setting unit 12 based on the condition set by the calculation condition setting unit 13. Then, for example, detection data having an appearance frequency of X times or more is selected from the detection data in the past one hour, and detection data having an appearance frequency of less than Y times is selected from among the detection data.
By doing so, “noise with low appearance frequency” and “communication wave with high appearance frequency and always appearing” can be excluded from the search target, and the appearance frequency can be efficiently received by search.
In addition, by calculating the appearance frequency regularly or regularly and setting the frequency of the communication wave to be received for the search receiver, it is possible to automatically cope with the appearance frequency that changes depending on the time zone. Search can be excluded.

  As described above, the search receiving apparatus according to the first embodiment is a search receiving apparatus including the receiver 100 that receives a broadband communication wave and the controller 200 that controls the receiver 100. 100 includes a distribution unit 1, a broadband reception unit 2, a spectrum generation unit 3, a threshold detection unit 4, a detection data storage unit 5, an appearance frequency calculation unit 6, a frequency setting unit 7, a reception unit 8, and a demodulation unit 9. The controller 200 includes a frequency range setting unit 10, a display unit 11, a threshold setting unit 12, a calculation condition setting unit 13, a demodulation setting unit 14, and a reproduction unit 15.

  Then, the distributing unit 1 distributes the received broadband communication wave into two, inputs the distributed one communication wave to the broadband receiving unit 2, and inputs the other distributed communication wave to the receiving unit 8, and sets the frequency range. The unit 10 sets the frequency range of the reception frequency received by the broadband receiving unit 2, and the broadband receiving unit 2 converts the broadband communication wave input from the distributing unit 1 into an IF signal, and then converts the converted IF signal to AD The spectrum generation unit 3 generates the spectrum of the broadband communication wave received by the broadband receiving unit 2 and inputs the generated spectrum to the threshold detection unit 4. The threshold detection unit 4 generates the spectrum. The spectrum input from the unit 3 is compared with the threshold set by the threshold setting unit 12, and a reception frequency having a signal level exceeding the set threshold is detected.

  The detection data storage unit 5 stores the information of the received signal detected by the threshold detection unit 4, and the appearance frequency calculation unit 6 is based on the appearance frequency calculation condition set by the calculation condition setting unit 13. The frequency setting unit 7 calculates the frequency of the communication wave that can be received by the receiving unit 8 based on the appearance frequency data calculated by the appearance frequency calculating unit 6. The receiving unit 8 converts the signal input from the distributing unit 1 into an IF signal, converts the signal into digital data by AD conversion, inputs the converted digital data to the demodulating unit 9, and the demodulating unit 9 The encoded data is demodulated by the demodulation method set by the demodulation setting unit 14, and the reproduction unit 15 reproduces the data demodulated by the demodulation unit 9.

  According to the present embodiment, the appearance frequency calculation unit 6 determines the appearance frequency of the received signal exceeding the threshold set by the threshold setting unit 12 based on the appearance frequency calculation condition set by the calculation condition setting unit 13. The frequency setting unit 7 calculates and sets the frequency of the communication wave that can be received by the reception unit 8 based on the appearance frequency data calculated by the appearance frequency calculation unit 6. In this case, frequency detection can be performed efficiently without detecting unnecessary frequencies (that is, frequencies with low appearance frequency).

Embodiment 2. FIG.
FIG. 3 is a diagram illustrating a configuration of the search reception apparatus according to the second embodiment.
As shown in FIG. 3, the search receiving apparatus according to the present embodiment is characterized in that in the search receiving apparatus according to the first embodiment, an appearance interval calculation unit is added to the receiver.
In the actual form 1 described above, the frequency setting unit 7 sets the frequency of the communication wave that can be received by the receiving unit 8 based on the appearance frequency data calculated by the appearance frequency calculating unit 6, but in this embodiment, the frequency setting unit 7 The setting unit 7 determines the frequency of the communication wave that can be received by the receiving unit 8 based on both the “appearance frequency data calculated by the appearance frequency calculating unit 6” and “appearance interval data calculated by the appearance interval calculating unit 16”. It is characterized by setting.

As in the first embodiment, the broadband receiving unit 2 converts the RF signal having the frequency set by the frequency range setting unit 10 into an IF signal, and then converts the IF signal into digital data (IQ data) by AD conversion. To do.
The digital data (IQ data) is subjected to FFT processing in the spectrum generation unit 3 to generate spectrum data and displayed on the display unit 11.
The user sets a threshold while visually confirming the spectrum displayed on the screen of the display unit 11, and the threshold detection unit 4 accumulates detection data exceeding the threshold in the detection data accumulation unit 5.
The operation so far is the same as that of the first embodiment.

In the present embodiment, conditions for calculating the appearance frequency and the appearance interval are input from the calculation condition setting unit 13.
Then, the appearance frequency calculation unit 6 calculates the appearance frequency based on the detection data stored in the detection data storage unit 5.
Furthermore, the appearance interval calculation unit 16 calculates a frequency having a regularity (for example, appears in a 1-second cycle) in the appearance interval based on the detection data stored in the detection data storage unit 5, and based on the data Thus, the frequency setting unit 7 sets the frequency for search reception to the receiving unit 8.

As described above, the calculation condition setting unit 13 of the search reception apparatus according to the present embodiment sets the appearance frequency calculation condition of the received signal and the appearance interval calculation condition of the received signal output from the detection data storage unit. The receiver 100 includes an appearance interval calculation unit 16 that calculates the appearance interval of the reception signal stored in the detection data storage unit 5 based on the appearance interval calculation condition set by the calculation condition setting unit 13, and sets the frequency. The unit 7 sets the frequency of the communication wave that can be received by the receiving unit 8 based on the appearance frequency data calculated by the appearance frequency calculating unit 6 and the appearance interval data calculated by the appearance interval calculating unit 16.
As a result, it is possible to efficiently detect the frequency without detecting a frequency that is an unnecessary frequency at the time of search reception, and a frequency having a law in the communication interval such as digital modulation. "Can also be searched efficiently.
Further, on the same principle, it is possible to exclude a frequency having a regularity in the communication interval from the search target.

  In the above description, the case where both the appearance frequency calculation unit 6 and the appearance interval calculation unit 16 are provided in the receiver 100 has been described, but only the appearance interval calculation unit 16 is provided in the receiver 100. Also good.

Embodiment 3 FIG.
FIG. 4 is a diagram illustrating the configuration of the search reception apparatus according to the third embodiment.
As shown in FIG. 4, the search receiving apparatus according to the present embodiment is characterized in that, in the search receiving apparatus according to the first embodiment, an IQ data storage unit 17 and a modulation estimation unit 18 are added to the receiver 100. And
As in the case of the first embodiment, the broadband receiving unit 2 converts the RF signal having the frequency set by the frequency range setting unit 10 into an IF signal, and then AD-converts the converted IF signal into IQ data. Obtain IQ data.

The IQ data is subjected to FFT processing in the spectrum generation unit 3 to generate spectrum data and displayed on the display unit 11.
A threshold value is set based on information displayed on the display unit 11, and the detection data exceeding the threshold value is accumulated in the detection data accumulation unit 5 by the threshold value detection unit 4.
The operations so far are the same as those in the first and second embodiments described above.
In the present embodiment, IQ data obtained by the broadband receiving unit 2 is also accumulated in the IQ data accumulating unit 17, and the accumulated IQ data is input to the modulation estimating unit 18.
As in the case of the first embodiment, the appearance frequency calculation condition is input to the appearance frequency calculation unit 6 from the calculation condition setting unit 13, and the appearance frequency calculation unit 6 determines from the detection data accumulated in the detection data accumulation unit 5. Appearance frequency is calculated.

Further, the modulation estimation unit 18 receives the modulation estimation condition from the calculation condition setting unit 13 and obtains frequency information from the appearance frequency calculation unit 6, thereby obtaining the received signal from the IQ data stored in the IQ data storage unit 17. Estimate the modulation method.
The “modulation estimation condition” set by the calculation condition setting unit 13 is, for example, a condition that “receives only signals estimated as AM modulation or FM modulation”.
As a method of setting “modulation estimation conditions”, the user sets “modulation estimation conditions” on the screen of the controller 200.

The frequency setting unit 7 determines the frequency of the reception signal received by the reception unit 8 based on “the appearance frequency calculated by the appearance frequency calculation unit 6” and “the modulation method of the reception signal estimated by the appearance frequency modulation estimation unit 18”. Set.
That is, in the present embodiment, the receiving unit 8 receives only the received signal of the target modulation method among the received signals exceeding the threshold set by the threshold setting unit 12.

As described above, the receiver of the search reception apparatus according to the present embodiment includes the IQ data storage unit 17 and the modulation estimation unit 18 that store the IQ data obtained by the wideband reception unit 2,
The calculation condition setting unit 13 sets modulation conditions for the appearance frequency calculation condition and the modulation estimation unit 15,
The modulation estimation unit 18 inputs modulation estimation conditions from the calculation condition setting unit 13 and obtains frequency information from the appearance frequency calculation unit 6, thereby modulating the received signal from the IQ data stored in the IQ data storage unit 17. The frequency setting unit 7 sets the frequency of the communication wave that can be received by the receiving unit 8 based on the appearance frequency data calculated by the appearance frequency calculating unit 6 and the modulation scheme estimated by the modulation estimating unit 18.

As a result, it is possible to efficiently detect the frequency without detecting a frequency that is an unnecessary frequency at the time of search reception, and a frequency having a law in the communication interval such as digital modulation. "Can also be searched efficiently.
Furthermore, the modulation scheme estimated by the modulation estimation unit 18 can be set in the demodulation unit 9.
In addition, it is possible to exclude a frequency of a specific modulation method from a search target based on the same principle.
In addition, as a method of setting the modulation scheme estimated by the modulation estimation unit 18 to the demodulation unit 9, the following three patterns (ac) are assumed.
a. The user selects and sets a modulation method using the demodulation setting unit 14.
b. The modulation scheme estimated by the modulation estimation unit 18 is automatically set.
c. The user refers to the modulation scheme estimated by the modulation estimation unit 18, and the user selects and sets the modulation scheme using the demodulation setting unit 14.

  INDUSTRIAL APPLICABILITY The present invention is useful for realizing a search receiving apparatus suitable for radio wave monitoring that can efficiently search for an appearance frequency without detecting a frequency that is not subject to detection and that is not detected.

DESCRIPTION OF SYMBOLS 1 Distribution part 2 Broadband receiving part 3 Spectrum generation part 4 Threshold detection part 5 Detection data storage part 6 Appearance frequency calculation part 7 Frequency setting part 8 Reception part 9 Demodulation part 10 Frequency range setting part 11 Display part 12 Threshold setting part 13 Calculation conditions Setting unit 14 Demodulation setting unit 15 Playback unit 16 Appearance interval calculation unit 17 IQ data storage unit 18 Modulation estimation unit 100 Receiver 200 Controller

Claims (3)

A search reception device comprising a receiver for receiving a broadband communication wave and a controller for controlling the receiver,
The receiver is provided with a distribution unit, a broadband reception unit, a spectrum generation unit, a threshold detection unit, a detection data storage unit, an appearance frequency calculation unit, a frequency setting unit, a reception unit, and a demodulation unit,
The controller includes a frequency range setting unit, a display unit, a threshold setting unit, a calculation condition setting unit, a demodulation setting unit, and a reproduction unit,
The distribution unit distributes the received broadband communication wave into two, inputs the distributed one communication wave to the broadband reception unit, and inputs the other distributed communication wave to the reception unit,
The frequency range setting unit sets a frequency range of a reception frequency received by the broadband receiving unit,
The wideband receiving unit converts a wideband communication wave input from the distributing unit into an IF signal, and then converts the converted IF signal into digital data,
The spectrum generation unit generates a spectrum of a broadband communication wave received by the broadband reception unit, and inputs the generated spectrum to the threshold detection unit,
The threshold detection unit compares a spectrum input from the spectrum generation unit with a threshold set by the threshold setting unit, detects a reception frequency of a signal level exceeding the set threshold,
The detection data storage unit stores information of the reception signal detected by the threshold detection unit,
The appearance frequency calculation unit calculates the appearance frequency of the received signal that exceeds the threshold set by the threshold setting unit based on the appearance frequency calculation condition set by the calculation condition setting unit,
The frequency setting unit sets a frequency of a communication wave that can be received by the receiving unit based on the appearance frequency data calculated by the appearance frequency calculating unit,
The receiving unit converts the signal input from the distributing unit into an IF signal, then converts the signal into digital data by AD conversion, and inputs the converted digital signal to the demodulating unit.
The demodulator demodulates the encoded data with the demodulation method set by the demodulation setting unit,
The search reception device, wherein the reproduction unit reproduces data demodulated by the demodulation unit. The calculation condition setting unit sets the appearance frequency calculation condition and the appearance interval calculation condition of the reception signal output from the detection data storage unit,
Based on the appearance interval calculation condition set by the calculation condition setting unit, the receiver includes an appearance interval calculation unit that calculates an appearance interval of the reception signal accumulated in the detection data accumulation unit,
The frequency setting unit sets the frequency of a communication wave that can be received by the receiving unit based on the appearance frequency data calculated by the appearance frequency calculating unit and the appearance interval data calculated by the appearance interval calculating unit. The search receiving device according to claim 1. The receiver includes an IQ data accumulating unit and a modulation estimating unit that accumulate IQ data obtained by the wideband receiving unit,
The calculation condition setting unit sets a modulation condition for the appearance frequency calculation condition and the modulation estimation unit,
The modulation estimation unit inputs modulation estimation conditions from the calculation condition setting unit, and obtains frequency information from the appearance frequency calculation unit, thereby estimating the modulation scheme of the received signal from the IQ data stored in the IQ data storage unit 17. And
The frequency setting unit sets the frequency of a communication wave that can be received by the receiving unit based on the appearance frequency data calculated by the appearance frequency calculating unit and the modulation scheme estimated by the modulation estimation unit. Item 5. The search receiving device according to Item 1.

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