KR100832517B1 - Method of checking siganl pattern/synchronization and checking siganl pattern/synchronization device of enabling the method - Google Patents

Abstract

A method for checking signal pattern/synchronization and a signal pattern/synchronization checking apparatus using the same are provided to set a threshold value, which can vary according to first correlation values, thereby detecting the frequency hopping pattern information and synchronization of a signal more accurately. A first correlator(100) generates plural first correlation values by using a frequency hopping pattern detection function for a received signal. A threshold value determination unit(110) determines a threshold value based on the first correlation values. A second correlator(120) generates plural second correlation values by using the frequency pattern detection function for the predetermined length sample of the signal. A pattern information acquisition unit(130) acquires the frequency hopping pattern information of the signal according to the second correlation values and the threshold value.

Description

Signal pattern / synchronous detection method and signal pattern / synchronous detection device using the same {METHOD OF CHECKING SIGANL PATTERN / SYNCHRONIZATION AND CHECKING SIGANL PATTERN / SYNCHRONIZATION DEVICE OF ENABLING THE METHOD}

1 is a block diagram showing a signal pattern / synchronization detection device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an example of the threshold value determination unit illustrated in FIG. 1.

3 is a diagram illustrating an example of a process of obtaining frequency hopping pattern information of a signal according to the present invention.

4 is a flowchart illustrating a signal pattern / synchronous detection method according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: first cross-correlator

110: threshold determination unit

120: second cross-correlator

130: pattern information acquisition unit

The present invention relates to a reception apparatus of a communication system, and more particularly, to a signal pattern / synchronization detection apparatus and method for detecting a pattern and synchronization of a signal included in a communication receiver.

Recently, the number of wireless Internet users has exploded. However, the current wireless Internet service, which is mainly provided, does not have a high data transmission rate, and thus, an Internet service requiring high speed data transmission such as a multimedia service is not provided. Recently, users and service providers are strongly demanding technologies that support low-cost Internet services regardless of time and place.

In response to these demands, various signal transmission schemes have emerged. The most representative one is orthogonal frequency division multiplexing. Orthogonal frequency division multiplexing uses a wide frequency band efficiently.

In addition, since the orthogonal frequency division multiplexing transmits a plurality of orthogonal carriers in parallel, frequency selective fading generated when data is transmitted at high speed in a wide frequency band can be overcome.

In addition, since the orthogonal division multiplexing method can overlap the frequency spectrum, the frequency usage efficiency is high, and the inter-symbol interference (ISI) effect can be reduced by inserting a guard interval.

Moreover, in recent years, multi-band Orthogonal Division Multiplex (Multi-Band OFDM) has been in the spotlight. This method transmits a symbol in the frequency hopping method. That is, the multi-band orthogonal division multiplexing method transmits each symbol while varying the frequency according to a predetermined pattern.

However, in order to process a signal transmitted through the frequency hopping scheme according to the multi-band orthogonal division multiplexing scheme, the frequency hopping pattern and the synchronization of the signal should be detected.

In general orthogonal division multiplexing, there are two types of cross-correlation and auto-correlation. The autocorrelation method uses repeatedly received data, and has a disadvantage in that the amount of data to be stored is very large when the synchronization of a signal is detected in the autocorrelation method. However, the autocorrelation method provides more accurate synchronization detection results than the cross-correlation method. In contrast, the cross-correlation method detects synchronization of a received signal through previously known information. The cross-correlation method has an advantage that the amount of data to be stored is small, but has the disadvantage of providing the frequency hopping pattern information and the synchronization detection result of the inaccurate signal.

Therefore, there is an urgent need for a signal pattern / synchronization detecting apparatus and method capable of more accurately detecting frequency pattern information and synchronization of a signal while utilizing the advantages of the cross-correlation method based on the cross-correlation method.

The present invention provides a signal pattern / synchronization detecting apparatus and method for detecting frequency hopping pattern information and synchronization of a signal more accurately by setting a threshold value that can be changed according to a first cross-correlation value.

The present invention provides a signal pattern / synchronization detection apparatus and method which can prevent the overlooking of frequency hopping pattern information and synchronization detection of a signal by setting a smaller threshold value as the first cross-correlation value is larger.

The present invention provides a signal pattern / synchronization detecting apparatus and method which can prevent the detection of frequency hopping pattern information and synchronization of a wrong signal by setting a larger threshold value as the first cross-correlation value is smaller.

The present invention provides a signal pattern / synchronous detection apparatus and method which can provide accurate results without using hardware resources required by the autocorrelation method by detecting frequency hopping pattern information and synchronization of a signal using a cross-correlation method. do.

The signal pattern / synchronization detection apparatus according to an embodiment of the present invention generates a first correlator for generating a plurality of first correlation values using a frequency hopping pattern detection function on a received signal. A threshold value determining unit for determining a threshold value based on the first cross-correlation values, and generating a plurality of second cross-correlation values for the predetermined length sample of the signal using the frequency pattern detection function. And a pattern information obtaining unit obtaining frequency hopping pattern information of the signal according to the second cross-correlator and the second cross-correlation values and the threshold value.

In this case, the threshold value determination unit may determine the threshold value based on a first maximum value having the largest magnitude among the first cross-correlation values.

In this case, the threshold value determining unit compares the first maximum value with at least one comparison value prepared in advance to determine a range to which the first maximum value belongs and a range to which the first maximum value belongs. The threshold value generator may be configured to generate the threshold value.

In addition, the signal pattern / synchronous detection method according to an embodiment of the present invention to generate a plurality of first correlation values for the received signal using a frequency hopping pattern detection function, the first Determining a threshold value based on the first cross-correlation values, generating a plurality of second cross-correlation values for the predetermined length sample of the signal using the frequency pattern detection function and the second cross correlation Acquiring frequency hopping pattern information of the signal according to correlation values and the threshold value.

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

1 is a block diagram showing a signal pattern / synchronization detection device according to an embodiment of the present invention.

Referring to FIG. 1, a signal pattern / synchronous detection apparatus according to an embodiment of the present invention may include a first cross-correlator 100, a threshold value determiner 110, a second cross-correlator 120, and a pattern information acquirer ( 130).

The first cross-correlator 100 generates a plurality of first correlation values for the received signal using a frequency hopping pattern detection function.

In this case, the signal may be received in a multi-band orthogonal frequency division multiplexing scheme.

At this time, the first cross-correlator 100 may generate the first cross-correlation values by using the frequency hopping pattern detection function prepared in advance for each frequency hopping pattern that the signal may have.

That is, in a multi-band orthogonal frequency multiplexing based communication system, signals may be transmitted through various frequency hopping patterns.

For example, the transmitter may transmit the A symbol through the X, Y, and Z bands over time. At this time, the frequency hopping pattern information may include information about the order of the X, Y, Z band. At this time, when the receiver first connects to the piconet, the receiver should acquire the frequency hopping pattern information of the A symbol and the synchronization of the A symbol.

At this point, the first cross-correlator 100 may generate first cross-correlation values to test all possible frequency hopping patterns.

That is, in the above example, when the transmitter is assumed to have three frequency hopping patterns, such as (X, Y, Z), (Y, X, Z), (Z, Y, X), the second Cross-correlator 100 may generate three first cross-correlation values to test the three frequency hopping patterns.

The first cross-correlation values may be generated through a frequency hopping pattern detection function. At this time, the signal pattern / synchronization detection apparatus according to an embodiment of the present invention may have a frequency hopping pattern detection function prepared in advance corresponding to each frequency hopping pattern that the transmitter may have. Accordingly, the first cross-correlation values may be generated through a frequency hopping pattern detection function.

In this case, the first cross-correlation values may be generated through Equation 1 below.

는 수신된 신호이며,

는 주파수 호핑 패턴 검출 함수이고,

는 제1 상호상관값이다. Where i is the index of the frequency hopping pattern,

Is the received signal,

Is a frequency hopping pattern detection function,

Is the first cross-correlation value.

Therefore, when i is '4', four first cross-correlation values and frequency hopping pattern detection functions may exist.

In addition, the threshold determination unit 110 determines a threshold based on the first cross-correlation values.

는 네 개의 값을 가질 수 있다. 즉, 제1 상호상관값은

,

,

및

으로서 네 개의 값을 가질 수 있다. 이 때, 임계값 결정부(110)는 제1 상호상관값을 기초로 임계값을 결정한다. Again, referring to Equation 1, i is the first cross-correlation value when '4'

Can have four values. In other words, the first cross-correlation value is

,

,

And

It can have four values. At this time, the threshold value determination unit 110 determines the threshold value based on the first cross-correlation value.

At this time, the threshold value determination unit 110 may determine the threshold value based on the first maximum value having the largest size among the first cross-correlation values.

,

,

및

중

가 가장 큰 경우에는

가 제1 최대값이 될 것이고,

를 기초로 임계값이 결정될 수 있다. E.g,

,

,

And

medium

Is the largest

Will be the first maximum,

The threshold may be determined based on the.

At this time, the threshold value determination unit 110 may determine a threshold having a smaller size as the first maximum value increases.

가 제1 최대값이라고 가정한다. 이 때,

의 값이 클수록 작은 임계값이 결정될 수 있다. 예를 들면,

가 '10'인 경우 임계값이 20이라면,

가 '15'인 경우 임계값은 10으로 결정될 수 있다. If, as in the above example,

Assume is a first maximum value. At this time,

The larger the value of, the smaller the threshold value can be determined. For example,

Is '10' and if the threshold is 20,

Is '15', the threshold may be determined as 10.

Therefore, the present invention can avoid overlooking frequency hopping pattern information and synchronization of a signal by determining a smaller threshold value if the first maximum value is large. In addition, the present invention can determine the frequency hopping pattern information and synchronization of a more accurate signal by determining a larger threshold value if the first maximum value is small.

In this case, the threshold value determination unit 110 compares the first maximum value with at least one comparison value prepared in advance, and determines a range to which the first maximum value belongs, and the first maximum value comparison unit and the first maximum value. It may include a threshold generation unit for generating the threshold value according to the range to which it belongs. This will be described in detail with reference to FIGS. 2 and 3.

At this time, the threshold value determination unit 110 may generate termination information or restart information when the first maximum value is less than or equal to a predetermined level.

For example, if the first maximum value is very small, no further action according to the invention may be required. In this case, the threshold value determination unit 110 may transmit the frequency hopping pattern information of the signal and the information indicating the completion of the synchronization to the signal pattern / synchronous detection device of the present invention through the termination information. In addition, the threshold value determination unit 110 may transmit the frequency hopping pattern information of another signal and the information indicating that the restart is necessary to the signal pattern / sync detection device through the restart information.

The second cross-correlator 120 also generates a plurality of second cross-correlation values using the frequency pattern detection function for a predetermined length sample of the signal.

At this time, the second cross-correlator 120 may generate the second cross-correlation values through the same principle that the first cross-correlator 100 generates the first cross-correlation values. In this case, the second cross-correlator 120 may be included in the first cross-correlator 100, and the first cross-correlator 100 may also simultaneously perform the function of the second cross-correlator 120.

Since the principle of generating the cross-correlation value using the frequency pattern detection function has been described with reference to the first cross-correlator, it will be omitted below.

In this case, the second cross-correlation values may be generated as many as the number of frequency hopping patterns that the signal may have.

The overall operation of the second cross-correlator 120 and the signal pattern / synchronous detection apparatus will be described in detail with reference to FIG. 3.

In addition, the pattern information acquisition unit 130 obtains frequency hopping pattern information of the signal according to the second cross-correlation values and the threshold value.

At this time, the pattern information acquisition unit 130 may obtain the frequency hopping pattern information of the signal according to the second maximum value and the threshold value having the largest magnitude among the second cross-correlation values.

At this time, the pattern information acquisition unit 130 may obtain the frequency hopping pattern information of the signal when the second maximum value is larger than the threshold value.

For example, assume that four second cross-correlation values are generated through the second cross-correlator 120 at 10, 20, 30, and 40. In addition, it is assumed that the threshold determined based on the first cross-correlation value is 35. At this time, since 40 of the four cross-correlation values is the maximum, 40 is the second maximum value. In addition, the pattern information acquisition unit 130 obtains the frequency hopping pattern information of the signal because the second maximum value is greater than 35. That is, the pattern information acquisition unit 130 may obtain frequency hopping pattern information about the frequency hopping pattern corresponding to 30 of the second cross-correlation value.

At this time, the pattern information acquisition unit 130 may further acquire the synchronization information of the signal. That is, the pattern information acquisition unit 130 may determine the synchronization information of the signal by measuring the sample timing at which the second maximum value is larger than the threshold value. Therefore, the present invention can acquire not only frequency hopping pattern information but also synchronization information.

2 is a block diagram illustrating an example of the threshold value determination unit 110 illustrated in FIG. 1.

The threshold determiner 110 according to an embodiment of the present invention includes a first maximum value comparator 210 and a threshold value generator 220.

The first maximum value comparator 210 compares the first maximum value with at least one comparison value prepared in advance to determine a range to which the first maximum value belongs.

For example, assume that the first maximum value is 25. At this time, the comparison value may be prepared in advance to 8, 14, 20, 26, 32. At this time, the first maximum value comparator 210 compares the comparison value with 25 which is the first maximum value. Thus, the first maximum value may be determined to be greater than 20 and less than 26. As a result, it may be determined that the range to which the first maximum value belongs is in a range from 20 to 26.

In addition, the threshold value generator 220 generates a threshold value according to a range to which the first maximum value belongs. In this case, the threshold generator 220 may generate one of two or more candidate thresholds prepared in advance according to a range to which the first maximum value belongs.

For example, suppose a comparison value prepared in advance is 8, 14, 20, 26, 32. At this time, the candidate threshold may be set to A in the range of 8 to 14, B in the range of 14 to 20, C in the range of 20 to 26, and D in the range of 26 to 32. The value can be set. At this time, the relationship between the candidate thresholds A, B, C, and D is as follows.

That is, the present invention prevents the frequency hopping pattern information and the synchronization information of the signal from being missed by selecting a smaller candidate threshold as a threshold as the first maximum is larger, and by setting a larger candidate threshold as a smaller first maximum. It is advantageous to obtain frequency hopping pattern information and synchronization information more accurately by selecting.

3 is a diagram illustrating an example of a process of acquiring frequency hopping pattern information of a signal according to the present invention.

,

,

,

는 네 가지 주파수 호핑 패턴에 대응하는 제1 상호상관값 또는 제2 상호상관값을 의미한다. 또한,

,

,

,

의 아래 첨자(1, 2, 3, 4)는 주파수 호핑 패턴의 인덱스를 의미한다.Referring to FIG. 3, a first cross-correlation value, a second cross-correlation value, and a threshold value for four frequency hopping patterns are shown. n represents the sampling index,

,

,

,

Denotes a first cross-correlation value or a second cross-correlation value corresponding to four frequency hopping patterns. Also,

,

,

,

Subscripts 1, 2, 3, and 4 denote an index of the frequency hopping pattern.

①, ②, ③, and ④ refer to the first cross-correlation value. That is, the first cross-correlator generates a plurality of first cross-correlation values for the received signal using a frequency hopping pattern detection function.

At this time, the largest value among the plurality of first cross-correlation values is the first maximum value. That is, the first cross-correlation value corresponding to ② becomes the first maximum value.

At this time, the threshold value determination unit may determine the level of the threshold value based on the first maximum value ②. That is, the threshold value determination unit may determine a range to which the first maximum value ② belongs by comparing one or more comparison values prepared in advance and the first maximum value ②.

At this time, the threshold value determination unit may set the threshold value according to the range to which the first maximum value ② belongs.

When the first maximum value ② in the k-th sample is generated from the first cross-correlator, the second cross-correlator generates second cross-correlation values for a sample of a length L selected from the k-th sample. That is, the second cross correlator generates second cross-correlation values for the sampling index k to K + L-1. ⑤, ⑥, ⑦, ⑧, ⑨, ⑩, ⑪, and ⑫ mean the second cross-correlation value, and ⑨ means the second maximum value.

At this time, the pattern information acquisition unit obtains the frequency hopping pattern information of the signal according to the second cross-correlation values (⑤, ⑥, ⑦, ⑧, ⑨, ⑩, ⑪, ⑫) and the threshold value.

에 상응하는 주파수 호핑 패턴으로 판단될 수 있다. 왜냐 하면, 제2 최대값(⑨)이 임계값보다 크기 때문이다. 결국, 패턴 정보 획득부는 주파수 호핑 패턴 정보를 주파수 호핑 패턴 인덱스가 1인 것으로 판단할 수 있다. At this time, the pattern information acquisition unit may acquire the frequency hopping pattern information of the signal because the second maximum value ⑨ is greater than the threshold value. That is, the frequency hopping pattern information of the signal

It may be determined as a frequency hopping pattern corresponding to. This is because the second maximum value 9 is larger than the threshold. As a result, the pattern information acquisition unit may determine that the frequency hopping pattern index is 1.

In addition, the pattern information acquisition unit may further acquire the synchronization information of the signal according to the threshold value. In FIG. 3, the synchronization information or the synchronization timing of the signal may be determined to be a sampling index corresponding to the second maximum value ⑨.

4 is a flowchart illustrating a signal pattern / synchronous detection method according to an embodiment of the present invention.

Referring to FIG. 4, the signal pattern / synchronous detection method according to an embodiment of the present invention generates a plurality of first correlation values with respect to a received signal using a frequency hopping pattern detection function. (S410).

In this case, the generating of the first cross-correlation values (S410) may include generating the first cross-correlation values by using the frequency hopping pattern detection function prepared in advance for each frequency hopping pattern that the signal may have. Can be.

In addition, the signal pattern / synchronous detection method according to an embodiment of the present invention determines a threshold value based on the first cross-correlation values (S420).

In this case, the determining of the threshold value (S420) may be a step of determining the threshold value based on a first maximum value having the largest size among the first cross-correlation values.

In this case, the determining of the threshold value (S420) may be a step of determining the threshold value having a smaller size as the first maximum value increases.

In this case, the determining of the threshold value (S420) may be a step of generating end information or restart information when the first maximum value is less than or equal to a predetermined level.

In operation S420, the threshold may be determined by comparing the first maximum value with at least one comparison value prepared in advance to determine a range to which the first maximum value belongs (S421). The threshold value may be generated according to a range to which the threshold belongs (S422).

In this case, the generating of the threshold value (S422) may be a step of generating one of two or more candidate threshold values prepared in advance according to a range to which the first maximum value belongs.

In addition, the signal pattern / synchronous detection method according to an embodiment of the present invention generates a plurality of second cross-correlation values using the frequency pattern detection function for a predetermined length sample of the signal (S430). .

In addition, the signal pattern / synchronization detection method according to an embodiment of the present invention obtains the frequency hopping pattern information of the signal according to the second cross-correlation value and the threshold value (S440).

At this time, the step of obtaining the frequency hopping pattern information (S440) may be the step of obtaining the frequency hopping pattern information of the signal according to the second maximum value and the threshold having the largest magnitude among the second cross-correlation value have.

At this time, the step of obtaining the frequency hopping pattern information (S440) may be the step of obtaining the frequency hopping pattern information of the signal when the second maximum value is greater than the threshold value.

At this time, the step of obtaining the frequency hopping pattern information (S440) may be a step of further obtaining the synchronization information of the signal according to the second cross-correlation value and the threshold value.

Content not described with respect to the steps illustrated in FIG. 4 is the same as described above with reference to FIGS.

The signal pattern / synchronization detection method according to the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

The present invention can provide a signal pattern / sync detection device and method for more accurately detecting frequency hopping pattern information and synchronization of a signal by setting a threshold value that can be changed according to the first cross-correlation value.

The present invention can provide a signal pattern / synchronization detection apparatus and method for preventing the overlooking of frequency hopping pattern information and synchronization detection of a signal by setting a smaller threshold value as the first cross-correlation value is larger.

The present invention can provide a signal pattern / synchronization detection apparatus and method for preventing the detection of frequency hopping pattern information and synchronization of a wrong signal by setting a larger threshold value as the first cross-correlation value is smaller.

The present invention can provide a signal pattern / sync detection apparatus and method for providing accurate results without using hardware resources required by the autocorrelation method by detecting frequency hopping pattern information and synchronization of a signal using a cross-correlation method. have.

Claims (23)

A first correlator for generating a plurality of first correlation values for a received signal using a frequency hopping pattern detection function; A threshold value determination unit that determines a threshold value based on the first cross-correlation values; A second cross-correlator for generating a plurality of second cross-correlation values using the frequency pattern detection function for a predetermined length sample of the signal; And A pattern information obtaining unit obtaining frequency hopping pattern information of the signal according to the second cross-correlation values and the threshold value Signal pattern / synchronization detection device comprising a. The method of claim 1, The threshold value determining unit, And the threshold value is determined based on a first maximum value having the largest magnitude among the first cross-correlation values. The method of claim 2, The threshold value determining unit, And the threshold value having a smaller size as the first maximum value increases. The method of claim 2, The threshold value determining unit, A first maximum value comparing unit comparing the first maximum value with at least one comparison value prepared in advance and determining a range to which the first maximum value belongs; And A threshold generator configured to generate the threshold value according to a range to which the first maximum value belongs Signal pattern / synchronization detection device comprising a. The method of claim 4, wherein The threshold generator And selecting one of two or more candidate threshold values prepared in advance according to a range to which the first maximum value belongs, to generate the threshold value. The method of claim 2, The threshold value determining unit, And terminating information or restarting information when the first maximum value is less than or equal to a predetermined level. The method of claim 1, The first cross-correlator, And generating the first cross-correlation values using the frequency hopping pattern detection function prepared in advance corresponding to each frequency hopping pattern that the signal may have. The method of claim 1, The pattern information acquisition unit, And signal frequency hopping pattern information of the signal according to the second maximum value having the largest magnitude among the second cross-correlation values and the threshold value. The method of claim 7, wherein The pattern information acquisition unit, And signal frequency hopping pattern information of the signal when the second maximum value is greater than the threshold value. The method of claim 1, The pattern information acquisition unit, And further obtaining synchronization information of the signal according to the second cross-correlation values and the threshold value. The method of claim 1, And the signal is received in a multi-band orthogonal frequency division multiplexing method. Generating a plurality of first correlation values for a received signal using a frequency hopping pattern detection function; Determining a threshold based on the first cross-correlation values; Generating a plurality of second cross-correlation values using the frequency pattern detection function for a predetermined length sample of the signal; And Acquiring frequency hopping pattern information of the signal according to the second cross-correlation values and the threshold value; Signal pattern / synchronous detection method comprising a. The method of claim 12, Determining the threshold value, And determining the threshold value based on a first maximum value having the largest magnitude among the first cross-correlation values. The method of claim 13, Determining the threshold value, And determining the threshold value having a smaller size as the first maximum value increases. The method of claim 13, Determining the threshold value, Determining a range to which the first maximum value belongs by comparing the first maximum value with at least one comparison value prepared in advance; And Generating the threshold value according to a range to which the first maximum value belongs Signal pattern / synchronous detection method comprising a. The method of claim 15, Generating the threshold value, And selecting one of two or more candidate threshold values prepared in advance according to a range to which the first maximum value belongs, to generate the threshold value. The method of claim 13, Determining the threshold value, And generating end information or restart information when the first maximum value is equal to or less than a predetermined level. The method of claim 12, Generating the first correlation values may include: And generating the first cross-correlation values using the frequency hopping pattern detection function prepared in advance for each frequency hopping pattern that the signal may have. The method of claim 12, Acquiring the frequency hopping pattern information, And obtaining frequency hopping pattern information of the signal according to the second maximum value having the largest magnitude among the second cross-correlation values and the threshold value. The method of claim 18, Acquiring the frequency hopping pattern information, Acquiring frequency hopping pattern information of the signal when the second maximum value is greater than the threshold value. The method of claim 12, Acquiring the frequency hopping pattern information, And acquiring synchronization information of the signal according to the second cross-correlation values and the threshold value. The method of claim 12, And the signal is received in a multi-band orthogonal frequency division multiplexing method. A computer-readable recording medium in which a program for executing the method of any one of claims 12 to 22 is recorded.

Images