JP2007150450A - Synchronization circuit, method and program, recording medium and receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit for synchronizing with a measured signal precisely by confirming coincidence of maximum correlation position calculated every predetermined period and determining the synchronization position. <P>SOLUTION: The synchronization circuit comprises a section for creating a plurality split signals by extracting data of such a length as including at least one synchronization signal component from each starting point, i.e. data of a phase arranged at a fixed period in a measured signal, a section for prestoring a reference signal component having data substantially identical to the synchronization signal component, a section for varying the relative position of the reference signal to the split signal and calculating the correlation value of the split signal and the reference signal at each relative position, a section for detecting a relative position where the correlation value becomes greatest for every split signal, and a section for detecting a relative position detected at the position detecting section as the position of the synchronization signal component when it coincides with at least two split signals. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a synchronization circuit and a synchronization method for detecting a synchronization position of a signal including a synchronization signal component for every predetermined period, a program for causing the synchronization circuit to function, a recording medium storing the program, and a receiving apparatus including the synchronization circuit.

  For example, a CDMA (Code Division Multiple Access) signal or the like includes a signal component (hereinafter referred to as a synchronization signal component) determined in advance for each predetermined period. In a conventional signal analysis device, signal reception device, and the like, by detecting the position of the synchronization signal component, the signal of the method is synchronized and signal processing such as restoration is performed.

  A conventional signal analyzer or the like is given in advance a reference signal to be compared with the received signal. A signal analyzer or the like detects the position of the synchronization signal component of the received signal based on the reference signal. Next, a specific method for detecting the position of the synchronization signal component in a conventional signal analysis apparatus or the like will be described. Here, the data length of the synchronization signal component included in the received signal is a, and the data length of the data component included between the synchronization signal components is b. That is, the synchronization signal component is arranged in the received signal with a period a + b.

  A conventional signal analysis device or the like detects the position of the synchronization signal component of the received signal by using a reference signal in which the synchronization signal component is arranged at both ends and the synchronization signal component has a data component of data length b. That is, the data length of the reference signal is 2a + b. Further, the data component included in the reference signal is an arbitrary data array.

  A conventional signal analyzer or the like sequentially changes the relative position of the reference signal with respect to the received signal, and calculates a correlation value between the received signal and the reference signal for each relative position. If the relative position is such that the position of the sync signal component of the received signal and the position of the sync signal component of the reference signal are different, the correlation value is low, and if the relative position is such that these positions match, the correlation value is Get higher. For this reason, the position of the synchronizing signal component in the received signal can be detected by detecting the relative position where the correlation value is maximized.

  Since related patent documents are not recognized at present, the description is omitted.

  In the conventional synchronization method, since two reference signal components are included in the reference signal, position detection can be performed with higher accuracy than when a reference signal including only one synchronization signal component is used. However, as the data length of the reference signal increases, the amount of calculation for calculating the correlation value increases. Further, when the signal-to-noise ratio in the received signal is poor, there is a possibility that the position of the synchronization signal component is erroneously detected.

  For a received signal with a poor signal-to-noise ratio, the reliability of position detection can be improved by using a reference signal that includes a larger number of synchronization signal components at a constant period. However, as described above, there is a problem that the amount of calculation for calculating the correlation value increases with an increase in the data length of the reference signal.

  Therefore, an object of the present invention is to provide a synchronization circuit, a synchronization method, a program, a recording medium, and a reception device that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

  In order to solve the above-described problem, in the first embodiment of the present invention, a synchronization circuit that detects the position of a synchronization signal component for a signal under measurement that includes a synchronization signal component every fixed period, A divided signal generation unit that generates a plurality of divided signals obtained by extracting data having a length including at least one synchronization signal component from each of the start points, and a synchronization signal component Reference signal storage unit that stores reference signal components having substantially the same data in advance, and correlation calculation that calculates a correlation value between the divided signal and the reference signal at each relative position by changing the relative position of the reference signal with respect to the divided signal A position detection unit that detects the relative position with the maximum correlation value for each divided signal, and the relative position detected by the position detection unit is at least two or more divided signals. When match, to provide a synchronous circuit and a synchronous signal component detector for detecting the relative position as the position of the synchronization signal component.

  The division signal generation unit extracts the data length obtained by adding the data length of the synchronization signal component to the data length of a fixed period and further subtracting the data length of one unit from each start point, and generates a plurality of division signals. It's okay.

  The reference signal storage unit stores frequency domain reference signal components, and the correlation calculation unit converts each divided signal into a frequency domain signal, a frequency domain reference signal component, and a frequency domain division A multiplication unit that performs complex conjugate integration on the signal, and a signal inverse conversion unit that converts a multiplication result in the multiplication unit into a time-domain signal and calculates a correlation value for each relative position.

  The synchronization signal component detection unit may detect the relative position having the largest number of matching among the relative positions detected by the position detection unit for each divided signal as the position of the synchronization signal component.

  In the second aspect of the present invention, a synchronization method for detecting the position of a synchronization signal component for a signal under measurement that includes a synchronization signal component for every fixed period, the phase being arranged in the measurement signal at a fixed period A divided signal generation stage for generating a plurality of divided signals obtained by extracting data having a length including at least one synchronizing signal component from each starting point, and a reference having substantially the same data as the synchronizing signal component A reference signal storage stage for storing signal components in advance, a correlation calculation stage for changing the relative position of the reference signal with respect to the divided signal, and calculating a correlation value between the divided signal and the reference signal at each relative position, and a maximum correlation value The relative position detected in the position detection stage that detects the relative position for each divided signal and the position detection stage coincides in at least two or more divided signals. In case, to provide a synchronization method and a synchronization signal component detecting step of detecting the relative position as the position of the synchronization signal component.

  According to a third aspect of the present invention, there is provided a program for causing a synchronization circuit for detecting the position of a synchronization signal component to function with respect to a signal under measurement that includes a synchronization signal component every fixed period. A divided signal generation unit for generating a plurality of divided signals obtained by extracting data having a length including at least one synchronization signal component from each start point, and a synchronization signal component A reference signal storage unit that stores in advance a reference signal component having substantially the same data, and a correlation that changes a relative position of the reference signal with respect to the divided signal and calculates a correlation value between the divided signal and the reference signal at each relative position A calculation unit, a position detection unit that detects the relative position where the correlation value is maximum for each divided signal, and a relative position detected by the position detection unit is at least two or more divided signals. If they match in provides a program to function as a synchronizing signal component detecting unit for detecting the relative position as the position of the synchronization signal component.

  According to a fourth aspect of the present invention, there is provided a recording medium storing a program for causing a synchronization circuit for detecting the position of a synchronization signal component to function with respect to a signal under measurement that includes the synchronization signal component every fixed period. Divide the synchronization circuit to generate a plurality of divided signals by extracting data having a length including at least one synchronization signal component from each start point, with the phase data arranged at a constant period in the signal under measurement as the start point A signal generation unit, a reference signal storage unit for storing a reference signal component having substantially the same data as the synchronization signal component, and a relative position of the reference signal with respect to the divided signal, and the divided signal and the reference signal at each relative position A correlation calculation unit that calculates a correlation value with each other, a position detection unit that detects a relative position where the correlation value is maximum for each divided signal, and a relative detection by the position detection unit Location is if they match at least two or more divided signals to provide a recording medium to function as a synchronizing signal component detecting unit for detecting the relative position as the position of the synchronization signal component.

  According to a fifth aspect of the present invention, there is provided a receiving device that receives a transmission signal including a synchronization signal component every fixed period, the synchronization circuit detecting the position of the synchronization signal component of the transmission signal, and the synchronization circuit detecting And a processing unit that performs signal processing of the transmission signal based on the position of the synchronization signal component, and the synchronization circuit starts from phase data arranged at a fixed period in the transmission signal, and the synchronization signal from each start point. A divided signal generation unit that generates a plurality of divided signals obtained by extracting data having a length including at least one component, a reference signal storage unit that stores in advance a reference signal component having substantially the same data as the synchronization signal component, and a division The relative position of the reference signal with respect to the signal is changed, the correlation calculation unit that calculates the correlation value between the divided signal and the reference signal at each relative position, and the relative position where the correlation value is the maximum A position detection unit that detects each time, and a synchronization signal component detection unit that detects the relative position as the position of the synchronization signal component when the relative position detected by the position detection unit matches in at least two or more divided signals. A receiving device is provided.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  FIG. 1 is a diagram illustrating an example of a configuration of a receiving device 100 according to an embodiment of the present invention. The receiving apparatus 100 is an apparatus that receives a signal such as a CDMA system. That is, the receiving apparatus 100 receives a signal that includes a predetermined synchronization signal component for each predetermined period. In this example, the receiving apparatus 100 includes an analog-digital converter (hereinafter referred to as ADC) 10, a memory 12, a synchronization circuit 20, and a processing unit 14.

  The ADC 10 converts the signal received by the receiving device 100 into a digital signal. The memory 12 stores a digital signal output from the ADC 10. The synchronization circuit 20 detects the position of the synchronization signal component included in the received signal. The processing unit 14 performs signal processing on the received signal based on the position of the synchronization signal component. For example, the processing unit 14 may multiply the received signal by a spreading code based on the position of the synchronization signal component.

  Further, the receiving apparatus 100 may function as a test apparatus that tests the device under test 200 that outputs a signal under measurement that includes a synchronization signal component at regular intervals. In this case, the receiving apparatus 100 receives the signal under measurement. The synchronization circuit 20 detects the position of the synchronization signal component included in the signal under measurement. The processing unit 14 performs signal processing on the signal under measurement based on the position of the synchronization signal component. The processing unit 14 may determine pass / fail of the device under test 200 based on the signal under measurement multiplied by the spreading code. The receiving device 100 may be used as an analyzing device that analyzes a received signal.

  FIG. 2 is a diagram illustrating an example of the configuration of the synchronization circuit 20. The synchronization circuit 20 includes a divided signal generation unit 22, a reference signal storage unit 24, a correlation calculation unit 26, a position detection unit 28, and a synchronization signal component detection unit 30. The synchronization circuit 20 may be realized by hardware or may be realized by software. The synchronization circuit 20 may be realized by cooperation of hardware and software. The reference signal storage unit 24 stores in advance a reference signal component having substantially the same data as the synchronization signal component of the received signal under measurement. For example, the reference signal storage unit 24 may store in advance a reference signal component having the same data as the synchronization signal component inserted into the signal under measurement when the signal under measurement is transmitted.

  FIG. 3 is a diagram illustrating an example of the operation of the divided signal generation unit 22. The divided signal generation unit 22 starts from phase data arranged at a constant period in the signal under measurement, and extracts data having a length including at least one synchronization signal component from each start point, thereby dividing a plurality of divided signals. Generate a signal. Here, including at least one synchronization signal component means including at least one synchronization signal component in a continuous state. For example, the state having one synchronization signal component as a whole is not included by having the latter half portion of the synchronization signal component at the head portion of the divided signal and having the first half portion of the synchronization signal component at the end portion of the division signal.

  That is, when the data length of the synchronization signal component included in the signal under measurement is a and the data length of the data component between the synchronization signal components is b, each divided signal has a data length greater than 2a + b-1. Here, “1” indicates the data length of one unit of data transmitted by the signal under measurement. For example, the data length for one unit is the data length of one symbol. That is, each divided signal is obtained by adding the data length (a) of the synchronization signal component to the data length (a + b) of a fixed period in which the synchronization signal component is arranged in the signal under measurement, and further increasing the data length for one unit. It has the subtracted data length. For this reason, the data of the head part of each divided signal overlaps the data of the tail part of the preceding divided signal.

  As described above, the divided signal generation unit 22 generates such a divided signal, whereby each divided signal can include at least one synchronization signal component. Moreover, it is preferable that the division | segmentation signal production | generation part 22 produces | generates the division | segmentation signal which has the data length of 2a + b-1. Since each divided signal has such a data length, each divided signal includes only one synchronization signal component in a continuous state.

  FIG. 4 is a diagram illustrating an example of operations of the correlation calculation unit 26, the position detection unit 28, and the synchronization signal component detection unit 30. The correlation calculation unit 26 changes the relative position x of the reference signal with respect to the divided signal, and calculates the correlation value between the divided signal and the reference signal at each relative position x. That is, the divided signal and the reference signal are arranged on the same axis, and the position of the reference signal is sequentially changed. Then, for each position of the reference signal, a correlation value between the reference signal and the component of the divided signal corresponding to the position of the reference signal is calculated.

  Since the synchronization signal component included in the divided signal and the reference signal have substantially the same data, the correlation value shows the maximum value when the position of the reference signal matches the position of the synchronization signal component. The correlation calculation unit 26 calculates a correlation value for each relative position x of the reference signal with respect to the divided signal, for each divided signal.

  The position detection unit 28 detects the relative position x having the maximum correlation value for each divided signal. The synchronization signal component detection unit 30 detects the relative position as the position of the synchronization signal component when the relative position x detected by the position detection unit 28 matches in at least two or more divided signals. For example, the synchronization signal component detection unit 30 may detect the relative position as the position of the synchronization signal component when the relative position x detected by the position detection unit 28 matches in all the divided signals.

  According to the receiving apparatus 100 in this example, the position of the synchronization signal component can be detected using a reference signal component having a shorter data length compared to the conventional apparatus. For this reason, the correlation value can be calculated with a small amount of calculation, and the processing speed can be improved.

  In addition, depending on the noise component superimposed on the signal under measurement, the relative position x detected by the position detector 28 may not match in all the divided signals. In such a case, the synchronization signal component detection unit 30 may detect the relative position x having the largest number of divided signals with the same relative position x detected by the position detection unit 28 as the position of the synchronization signal component.

  Further, it is unlikely that the correlation value becomes the maximum at the same relative position x in any two divided signals due to the noise component. Therefore, the synchronization signal component detection unit 30 may detect the relative position x as the position of the synchronization signal component when the relative position x detected by the position detection unit 28 matches in any two divided signals. Good. For example, every time the position detection unit 28 detects the relative position x in each divided signal, the synchronization signal component detection unit 30 newly detects any of the relative positions x in other divided signals that have already been detected. It is determined whether or not the relative positions x match. Then, when it coincides with any of the relative positions x, the relative position x may be set as the position of the synchronization signal component. In this case, the synchronization signal component detection unit 30 can end the process when the matching relative position x is detected, so that the processing speed can be improved.

  FIG. 5 is a flowchart illustrating an example of the operation of the receiving device 100. As described above, the receiving apparatus 100 in this example detects the relative position x as the position of the synchronization signal component when the relative position x detected by the position detection unit 28 matches in any two divided signals. .

  First, the signal under measurement is stored in the memory 12 in the signal capturing step S202. Next, in the divided signal generation step S204, the divided signal generation unit 22 generates a plurality of divided signals based on the signal under measurement.

  Next, in the correlation calculation step S206, the correlation calculation unit 26 calculates a correlation value between any of the divided signals and the reference signal component for each relative position. Next, in the position detection step S208, the position detection unit 28 detects the relative position where the correlation value calculated in the correlation calculation step S206 is maximized.

  Next, in the synchronization signal component detection step S210, the synchronization signal component detection unit 30 detects one of the relative positions already detected with respect to the other divided signals and the relative position detected in the immediately preceding synchronization signal component detection step S210. Is matched. If a matching relative position exists, the synchronization signal component detection unit 30 determines the relative position as the position of the synchronization signal component.

  When there is no matching relative position, the synchronization signal component detection unit 30 determines whether or not the processing of S206 to S210 has been performed on all the divided signals (S214). When the processes of S206 to S210 are performed on all the divided signals, the process is terminated because the position of the synchronization signal component cannot be detected.

  If there is a divided signal that has not been subjected to the processes of S206 to S210, a divided signal to be processed next is prepared (S216), and the processes of S206 to S210 are repeated for the divided signal. By such processing, the position of the synchronization signal component can be detected efficiently.

  FIG. 6 is a diagram illustrating an example of the configuration of the correlation calculation unit 26. The correlation calculation unit 26 may calculate a correlation value using the measured signal and reference signal component in the time domain, or may calculate a correlation value using the measured signal and reference signal component in the frequency domain. In this example, the correlation calculation unit 26 calculates a correlation value using the signal under measurement and the reference signal component in the frequency domain.

  The correlation calculation unit 26 includes a signal conversion unit 32, a multiplication unit 34, and a signal inverse conversion unit 36. In this example, the reference signal storage unit 24 stores a reference signal component in the frequency domain. The signal conversion unit 32 converts each divided signal output from the divided signal generation unit 22 into a frequency domain signal. For example, the signal converter 32 may convert the divided signal into a frequency domain signal by fast Fourier transform.

  The multiplier 34 performs complex conjugate integration of the reference signal component in the frequency domain and the divided signal in the frequency domain. For example, the multiplication unit 34 adds the product of the real part of the reference signal component and the real part of the divided signal to the product of the imaginary part of the reference signal component and the imaginary part of the divided signal, and Output as real part. The multiplication unit 34 subtracts the product of the real part of the reference signal component and the imaginary part of the divided signal from the product of the imaginary part of the reference signal component and the real part of the divided signal, and Output as an imaginary part.

  The signal inverse conversion unit 36 converts the multiplication result in the multiplication unit into a signal in the time domain. For example, the signal inverse transform unit 36 may generate a time domain signal by performing a fast Fourier inverse transform on the signal output from the multiplication unit 34. The time axis of the time signal output from the signal inverse conversion unit 36 indicates the relative position x, and the signal level indicates the correlation value. With such a configuration, the correlation value can be easily calculated.

  Further, in this example, the reference signal storage unit 24 stores the reference signal component in the frequency domain, but in another example, the reference signal storage unit 24 may store the reference signal component in the time domain. In this case, the signal converter 32 converts both the divided signal and the reference signal component into a frequency domain signal.

  FIG. 7 is a diagram illustrating an example of a configuration of a computer 500 that controls the receiving apparatus 100. In this example, the computer 500 stores a program that causes the receiving apparatus 100 to function as described with reference to FIGS. The computer 500 includes a CPU 700, a ROM 702, a RAM 704, a communication interface 706, a hard disk drive 710, an FD drive 712, and a CD-ROM drive 714. The CPU 700 operates based on programs stored in the ROM 702, the RAM 704, the hard disk drive 710, the flexible disk 720, and / or the CD-ROM 722.

  For example, a program that causes the reception device 100 to function causes the reception device 100 to function as the ADC 10, the memory 12, the synchronization circuit 20, and the processing unit 14 described with reference to FIGS. 1 to 6. Further, the computer 500 may function as the memory 12, the synchronization circuit 20, and the processing unit 14 based on the program. For example, the RAM 704 may function as the memory 12, and the CPU 700 may function as the synchronization circuit 20 and the processing unit 14.

  The communication interface 706 communicates with the receiving device 100, for example, and controls the receiving device 100. A hard disk drive 710 as an example of a storage device stores setting information and a program for operating the CPU 700. The ROM 702, the RAM 704, and / or the hard disk drive 710 store a program for causing the receiving device 100 to function as the receiving device 100 described with reference to FIGS. Further, the program may be stored in the flexible disk 720, the CD-ROM 722, the hard disk drive 710, and the like.

  The FD drive 712 reads a program from the flexible disk 720 and provides it to the CPU 700. The CD-ROM drive 714 reads a program from the CD-ROM 722 and provides it to the CPU 700.

  The program may be read from the recording medium directly into the RAM and executed, or may be once read into the RAM after being installed in the hard disk drive. Further, the program may be stored in a single recording medium or a plurality of recording media. The program stored in the recording medium may provide each function in cooperation with the operating system. For example, the program may request the operating system to perform a part or all of the function and provide the function based on a response from the operating system.

  As a recording medium for storing a program, in addition to a flexible disk and a CD-ROM, an optical recording medium such as a DVD and a PD, a magneto-optical recording medium such as an MD, a tape medium, a magnetic recording medium, an IC card, a miniature card, etc. A semiconductor memory or the like can be used. A storage device such as a hard disk or a RAM provided in a server system connected to a dedicated communication network or the Internet may be used as a recording medium.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  As is apparent from the above, according to the present invention, it is possible to accurately synchronize the signal under measurement including the synchronization signal component at a constant period.

It is a figure which shows an example of a structure of the receiver 100 which concerns on embodiment of this invention. 2 is a diagram illustrating an example of a configuration of a synchronization circuit 20. FIG. 6 is a diagram illustrating an example of an operation of a divided signal generation unit 22. FIG. 6 is a diagram illustrating an example of operations of a correlation calculation unit 26, a position detection unit 28, and a synchronization signal component detection unit 30. FIG. 4 is a flowchart illustrating an example of an operation of the reception device 100. 3 is a diagram illustrating an example of a configuration of a correlation calculation unit 26. FIG. FIG. 3 is a diagram illustrating an example of a configuration of a computer 500 that controls a receiving device 100.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... ADC, 12 ... Memory, 14 ... Processing part, 20 ... Synchronous circuit, 22 ... Divided signal generation part, 24 ... Reference signal storage part, 26 ... Correlation calculation , 28... Position detection unit, 30... Synchronization signal component detection unit, 32... Signal conversion unit, 34... Multiplication unit, 36. , 200 ... Device under test, 500 ... Computer, 700 ... CPU, 702 ... ROM, 704 ... RAM, 706 ... Communication interface, 710 ... Hard disk drive, 712 ... FD drive, 714 ... CD-ROM drive, 720 ... flexible disk, 722 ... CD-ROM

Claims (8)

A synchronization circuit that detects a position of the synchronization signal component with respect to a signal under measurement that includes the synchronization signal component every fixed period,
A divided signal that generates a plurality of divided signals obtained by extracting data having a length including at least one of the synchronization signal components from each of the start points, with the phase data arranged in the fixed period in the signal under measurement as a start point A generator,
A reference signal storage unit that stores in advance a reference signal component having substantially the same data as the synchronization signal component;
A correlation calculating unit that changes a relative position of the reference signal with respect to the divided signal and calculates a correlation value between the divided signal and the reference signal at each relative position;
A position detector that detects the relative position at which the correlation value is maximized for each of the divided signals;
A synchronization circuit comprising: a synchronization signal component detection unit that detects the relative position as the position of the synchronization signal component when the relative position detected by the position detection unit matches in at least two or more of the divided signals. The divided signal generation unit extracts a data length obtained by adding the data length of the synchronization signal component to the data length of the fixed period, and further subtracting the data length of one unit from each start point, and The synchronization circuit according to claim 1, wherein the synchronization signal is generated. The reference signal storage unit stores the reference signal component in a frequency domain,
The correlation calculation unit
A signal converter for converting each of the divided signals into a frequency domain signal;
A multiplier that performs complex conjugate integration of the reference signal component in the frequency domain and the divided signal in the frequency domain;
The synchronization circuit according to claim 1, further comprising: a signal inverse conversion unit that converts a multiplication result in the multiplication unit into a signal in a time domain and calculates the correlation value for each relative position. The synchronization signal component detection unit detects the relative position having the largest number of matching as the position of the synchronization signal component among the relative positions detected by the position detection unit for each of the divided signals. The synchronization circuit described. A synchronization method for detecting a position of the synchronization signal component with respect to a signal under measurement that includes the synchronization signal component every fixed period,
A divided signal that generates a plurality of divided signals obtained by extracting data having a length including at least one of the synchronization signal components from each of the start points, with the phase data arranged in the fixed period in the signal under measurement as a start point Generation stage,
A reference signal storing step for storing in advance a reference signal component having substantially the same data as the synchronization signal component;
A correlation calculating step of changing a relative position of the reference signal with respect to the divided signal and calculating a correlation value between the divided signal and the reference signal at each relative position;
A position detection step of detecting the relative position at which the correlation value is maximized for each of the divided signals;
A synchronization method comprising: a synchronization signal component detection step of detecting the relative position as a position of the synchronization signal component when the relative position detected in the position detection step matches in at least two or more of the divided signals. A program for functioning a synchronization circuit that detects the position of the synchronization signal component for a signal under measurement that includes the synchronization signal component every fixed period,
The synchronization circuit;
A divided signal that generates a plurality of divided signals obtained by extracting data having a length including at least one of the synchronization signal components from each of the start points, with the phase data arranged in the fixed period in the signal under measurement as a start point A generator,
A reference signal storage unit that stores in advance a reference signal component having substantially the same data as the synchronization signal component;
A correlation calculating unit that changes a relative position of the reference signal with respect to the divided signal and calculates a correlation value between the divided signal and the reference signal at each relative position;
A position detector that detects the relative position at which the correlation value is maximized for each of the divided signals;
A program that functions as a synchronization signal component detection unit that detects the relative position as the position of the synchronization signal component when the relative position detected by the position detection unit matches in at least two or more of the divided signals. A recording medium storing a program for functioning a synchronization circuit that detects the position of the synchronization signal component for a signal under measurement that includes a synchronization signal component for each predetermined period,
The program executes the synchronization circuit,
A divided signal that generates a plurality of divided signals obtained by extracting data having a length including at least one of the synchronization signal components from each of the start points, with the phase data arranged in the fixed period in the signal under measurement as a start point A generator,
A reference signal storage unit that stores in advance a reference signal component having substantially the same data as the synchronization signal component;
A correlation calculating unit that changes a relative position of the reference signal with respect to the divided signal and calculates a correlation value between the divided signal and the reference signal at each relative position;
A position detector that detects the relative position at which the correlation value is maximized for each of the divided signals;
A recording medium that functions as a synchronization signal component detection unit that detects the relative position as the position of the synchronization signal component when the relative position detected by the position detection unit matches in at least two or more of the divided signals. A receiving device that receives a transmission signal including a synchronization signal component at a certain period,
A synchronization circuit for detecting a position of the synchronization signal component of the transmission signal;
A processing unit that performs signal processing of the transmission signal based on the position of the synchronization signal component detected by the synchronization circuit;
The synchronization circuit includes:
Division signal generation for generating a plurality of division signals obtained by extracting data having a length including at least one synchronization signal component from each of the start points, with the phase data arranged in the transmission signal as the start point. And
A reference signal storage unit that stores in advance a reference signal component having substantially the same data as the synchronization signal component;
A correlation calculating unit that changes a relative position of the reference signal with respect to the divided signal and calculates a correlation value between the divided signal and the reference signal at each relative position;
A position detector that detects the relative position at which the correlation value is maximized for each of the divided signals;
And a synchronization signal component detection unit configured to detect the relative position as the position of the synchronization signal component when the relative position detected by the position detection unit matches in at least two or more of the divided signals.

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