KR100943276B1 - Single carrier transmission system capable of improving reception efficiency of single carrier receiver - Google Patents

Single carrier transmission system capable of improving reception efficiency of single carrier receiver Download PDF

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KR100943276B1
KR100943276B1 KR1020020064074A KR20020064074A KR100943276B1 KR 100943276 B1 KR100943276 B1 KR 100943276B1 KR 1020020064074 A KR1020020064074 A KR 1020020064074A KR 20020064074 A KR20020064074 A KR 20020064074A KR 100943276 B1 KR100943276 B1 KR 100943276B1
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pseudo
area
single carrier
pseudo noise
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KR20040035286A (en
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권용식
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삼성전자주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/38Transmitter circuitry
    • H04N5/40Modulation circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J13/00Code division multiplex systems
    • H04J13/0007Code type
    • H04J13/0022PN, e.g. Kronecker
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2626Arrangements specific to the transmitter
    • H04L27/2627Modulators
    • H04L27/2634IFFT/IDFT in combination with other circuits for modulation

Abstract

Disclosed is a single carrier transmission system capable of improving the reception performance of a single carrier receiving system. A single carrier transmission system according to the present invention is a single carrier transmission system for inserting and transmitting pseudo noise string information, which is synchronization information for synchronization between a transmitting side and a receiving side, into a single carrier data stream. Each of the pseudo noise string information generating section, a region division section for dividing the pseudo noise sequence information generated by the pseudo noise sequence information generating section into at least two areas, and a pseudo noise sequence information divided by the region section section And a mux for continuously inserting and multiplexing the region into the data stream. Here, the area separating unit includes a counting unit for counting the number of symbols of the pseudo noise sequence information generated by the pseudo noise sequence information generating unit, and when the value counted by the counting unit reaches a set value, the area of the pseudo noise sequence information is divided. Separate. As a result, the single carrier transmission system can significantly reduce jitter in the synchronization acquisition interval in the single carrier reception system, thereby improving the reception performance of the single carrier reception system.
Figure R1020020064074
Monocarrier, pseudo-noise sequence, symbol, jitter

Description

Single carrier transmission system capable of improving the reception performance of a single carrier receiving system {Single carrier transmission system capable of improving reception efficiency of single carrier receiver}

1 is a block diagram schematically showing a single carrier transmission system according to the ATSC standard method or the ADTB-T standard method;

FIG. 2 is a diagram illustrating an example of a frame structure of data according to FIG. 1;

3 is a diagram illustrating a structure of a data segment of FIG. 2;

FIG. 4 is a diagram illustrating a correlation between a frame synchronization signal and received data in the single carrier receiving system of FIG. 1; FIG.

5 is a diagram schematically showing a single carrier transmission system according to the present invention;

FIG. 6 is a diagram illustrating an example of a segment structure of data shown in FIG. 5;

FIG. 7 is a diagram showing another example of a segment structure of data shown in FIG. 5;

8 is a diagram illustrating still another example of the segment structure of data according to FIG. 5;

9 is a view showing another example of a segment structure of data shown in FIG. 5;

FIG. 10 is a diagram illustrating an example of pseudo noise string information shown in FIG. 5; and

FIG. 11 is a diagram illustrating a correlation between a frame synchronization signal and received data in the single carrier receiving system of FIG. 5.                 

Explanation of symbols on the main parts of the drawings

10, 110: scrambler 20, 120: FEC part

21, 121: RS encoder 23, 123: Interleaver

25, 125: Trellis encoder 130: PN generator

140: region division unit 141: counting unit

40, 160: pilot insertion section 50, 170: modulation section

60, 180: RF converter

The present invention relates to a single carrier transmission system, and more particularly, to a single carrier transmission system for improving the reception performance of a single carrier receiving system.

As communication, computers, and broadcasting converge to become multimedia, countries around the world are digitizing existing analog broadcasting. In particular, advanced countries such as the United States, Europe, and Japan have already performed some digital broadcasting through satellites. In addition, a standard method for digital broadcasting has been prepared, and this standard method is configured slightly differently in Naramama.

Standard methods for digital broadcasting are roughly classified into the US Advanced Television Systems Committee (ATSC) method, the European Digital Video Broadcasting-Terrestiral (DVB-T) method, and the Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) method in Japan. do.

Among the standard methods described above, the ATSC standard method supports various video formats such as HDTV (High Definition Television) and SDTV (Standard Definition Television), interlaced and progressive scanning, and 16: 9 and 4: 3 aspect ratios. Video encoding employs the MP @ HL of the MPEG-2 standard, audio encoding follows the Dolby AC-3 standard, service multiplexing, and the transport layer follows the MPEG-2 system standard. Channel coding uses Reed-Solomon coding, interleaving and Trellis coding, and modulation uses a single carrier 8-VSB (Vestigial Sideband) modulation. In addition, the ATSC standard shows a transmission rate of 19.39 Mbps over a bandwidth of 6 MHz, which is higher than DVB-T. ATSC standard method is designed to be strong against co-channel interference even in analog broadcasting environment with simulcast environment, and the hardware configuration is simpler than other methods to enable low-cost receiver configuration, and peak-to-average power. Ratio is better. However, there is no characteristic of single frequency network (SFN) or mobile reception of DVB-T.

Recently, an ADTB-T (Advanced Digital Television Broadcasting-Terrestial) standard similar to the ATSC standard has been proposed. The ADTB-T standard supports single / hybrid transmission mode and uses OQAM (Offset Quadrate Amplitude Modulation) modulation.

1 is a block diagram schematically illustrating a single carrier transmission system based on the ATSC standard method or the ADTB-T standard method. Referring to the drawings, a digital broadcasting system includes a scrambler 10, a forward error correction (FEC) unit 20, a mux 30, a pilot inserter 40, a modulator 50, and an RF converter ( 60). The FEC unit 20 also includes an RS encoder (Reed-Solomon encoder) 21, an interleaver 23, and a trellis encoder 25.

The scrambler 10 is also called a data randomizer, and randomizes the transmitted data signal in order to prevent a problem of losing the synchronization signal by repeating the same number such as 00000000b or 11111111b in the synchronous data transmission. The scrambler 10 changes the value of each byte of the data signal according to a predetermined pattern, and this process is reversed at the receiver to restore the correct value.

The RS encoder 21 is an FEC structure added to the input data stream. FEC refers to a technique for correcting bit errors that occur during transmission. Atmospheric noise, multipath propagation, signal fading, and nonlinearity of the transmitter all contribute to bit error, and the RS encoder 21 adds 20 bytes after 187 bytes in the case of an MPEG-II transport stream. The 20 additional bytes are called Reed Solomon Parity Bytes. The receiver compares the received 187 bytes with 20 parity bytes to determine accuracy. If an error is detected by the accuracy determination, the receiver locates the error and corrects the distorted byte to recover the original signal. In this way up to 10 bytes of error per stream can be recovered. Any further error is not recoverable, and if not recoverable, the entire stream is discarded.                         

The interleaver 23 disperses the data on the time axis so as to disturb the order of the data streams so that the transmission signal is less sensitive to interference. Even if noise occurs in any part of the signal band due to the dispersion of the transmission signal, signals in other bands are preserved. The receiver reverses this process and restores the distributed transmission back to the correct value.

The trellis encoder 25 forms an FEC structure that is different from the RS encoder 21. Unlike the RS encoder 21 which handles the entire MPEG-II stream, the trellis encoder 25 encodes in consideration of the influence of time, and this process is also called a convolutional code. Trellis encoder 25 divides an 8-bit byte into four 2-bit words. Here, the 2-bit word is compared with the previous word, and a 3-bit binary code is generated for the purpose of describing the change from the previous word to the current word. In the ATSC standard, this 3-bit code replaces the original 2-bit word and is transmitted as 8-level symbols of 8-VSB (3 bits = 8 levels). Thus, the 2-bit word input to the trellis encoder 25 is converted into a 3-bit signal and output. For this reason, an 8-VSB system is sometimes called a 2/3 rate coder. The advantage of trellis coding is that error information can be removed by tracking the passage of the signal over time.

After trellis coding by the trellis encoder 25, the mux 30 inserts a segment sync and a frame sync into the transmission signal. The pilot inserter 40 inserts a pilot (PILOT: Programmed Inquiry Learning Or Teaching) into the transmission signal into which the segment sync and the frame sync are inserted. Here, a slight DC shift (1.25V) is applied to the transmission signal just before modulation, in which case some residual carrier appears at the zero frequency point of the modulated spectrum. This generated residual carrier is called a pilot.

The modulator 50 modulates the transmission signal received from the pilot inserter 40 using 8-VSB modulation or OQAM modulation. The RF converter 60 converts the modulated transmission signal into a radio frequency (RF) and transmits the converted transmission signal through an antenna.

2 is a diagram illustrating an example of a frame structure of data according to a single carrier transmission system. The figure shows a frame structure of data according to the ATSC standard method. Referring to the figure, a field of ATSC data consists of 313 consecutive data segments, and ATSC field sync becomes a field data segment. An ATSC data frame consists of two ATSC data fields.

The repetition period of the ATSC data field is 24.2 msec and is similar to the NTSC vertical interval (NTSC period = 16.7 msec). Field sync has a well-known data symbol pattern and is used for ghost cancellation at the receiver. This process is accomplished by comparing the received signal with errors with field synchronization and adjusts the characteristics of the ghost cancellation equalizer using the resulting error vector.

The ATSC data segment consists of 187 bytes + 20 bytes of the original MPEG-II data stream. After trellis coding, the segment of 207 bytes is converted into 828 (= 207 x 4), 8-level symbol streams.

The segment sync signal is a repeating four symbol (1 byte) pulse added to the head of the data segment and replaces the sync byte of the original MPEG-II transport stream. The receiver can easily identify repeating segment sync signals from completely random data, and can accurately recover the clock even at noise and interference levels that make data recovery impossible. A segment of data to which a segment sync signal is provided is shown in FIG. 3. That is, the segment of the transmission signal is composed of a segment synchronization signal consisting of 8 symbols, two pseudo noise sequence (PN) information consisting of 511 and 253 symbols, and two system information signals consisting of 32 symbols. . Here, the pseudo noise sequence is a synchronization information sequence for predicting synchronization and channel of a transmission signal in a receiver receiving a signal. The pseudo noise string is generated by the PN information generation unit (not shown) and inserted into the transmission signal by the mux 30.

The single carrier receiving system uses a single carrier by using a correlation between the data transmitted by the single carrier transmission system and the field synchronization signal generated by the field synchronization signal generator (not shown) provided inside the single carrier reception system. Acquire synchronization with the transmission system. Correlation between the transmitted data and the field synchronization signal is shown in FIG. 4.

However, since a single carrier transmission system according to the related art uses only one pseudo noise sequence information or uses different kinds of pseudo noise sequence information, there is a jitter in the correlation value in channel estimation due to correlation in the single carrier reception system. Can not be estimated the exact channel, and thus there is a problem that the reception performance of a single carrier receiving system is degraded.

The present invention has been made to solve the above problems, and an object thereof is to provide a single carrier transmission system and a method of transmitting the same, which can improve the reception performance of a single carrier receiving system.

A single carrier transmission system according to the present invention for achieving the above object is a single carrier transmission system for inserting and transmitting pseudo-noise string information, which is the synchronization information for synchronization between the transmitting side and the receiving side into a single carrier data stream. A pseudo noise sequence information generation unit for generating the pseudo noise sequence information, an area classification unit for dividing the pseudo noise sequence information generated by the pseudo noise sequence information generation unit into at least two or more regions, and the region classification unit And a mux for continuously inserting and multiplexing each region of the pseudonoise string information separated by the data stream into the data stream. Here, the area separator includes a counting unit for counting the number of symbols of the pseudo-noise sequence information generated by the pseudo-noise sequence information generation unit, and when the value counted by the counting unit reaches a set value, the pseudo Classify the area of noise string information. In addition, the size of the data stream into which the pseudo-noise sequence information is inserted is implemented according to the ADTB-T standard.

The area separator may be implemented to divide the pseudo-noise sequence information into two areas having the same number of symbols based on the value counted by the counting unit. In this case, the area separator divides the pseudo noise string information into an area having 382 symbols. Alternatively, the area separator may divide the pseudo noise string information into an area having 384 symbols.

The area separator may be implemented to divide the pseudo-noise sequence information into two areas having different numbers of symbols based on a value counted by the counting unit. In this case, the area divider divides the pseudo noise string information into an area of 380 and 384 individual symbols.

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

5 is a view schematically showing a single carrier transmission system according to the present invention. Referring to the drawings, the digital broadcasting system includes a scrambler 110, a forward error correction (FEC) unit 120, a PN generation unit 130, an area division unit 140, a mux 150, and a pilot insertion unit. 160, a modulator 170, and an RF converter 180. In addition, the FEC unit 120 includes an RS encoder 121, an interleaver 123, and a trellis encoder 125, and the area separator 140 includes a counting unit 141.

The scrambler 110 randomizes the transmitted data signal in order to prevent a problem of losing the synchronization signal by repeating the same number, such as 00000000b or 11111111b, in the synchronous data transmission. The scrambler 110 changes the value of each byte of the data signal according to a predetermined pattern, and this process is reversed at the receiver to restore the correct value.

The RS encoder 121 adds 20 bytes after 187 bytes in the case of the MPEG-II transport stream. The receiver compares the received 187 bytes with 20 parity bytes to determine accuracy. If an error is detected by the accuracy determination, the receiver locates the error and corrects the distorted byte to recover the original signal. In this way up to 10 bytes of error per stream can be recovered. Any further error is not recoverable, and if not recoverable, the entire stream is discarded.

The interleaver 123 disperses the data on the time axis so as to disturb the order of the data streams so that the transmission signal is less sensitive to interference. Even if noise occurs in any part of the signal band due to the dispersion of the transmission signal, signals in other bands are preserved. The receiver reverses this process and restores the distributed transmission back to the correct value.

The trellis encoder 125 forms an FEC structure that is different from the RS encoder 121. Unlike the RS encoder 121 that handles the entire MPEG-II stream, the trellis encoder 125 encodes in consideration of the influence of time.

The PN generation unit 130 generates pseudo noise string information that is synchronization information for synchronization between the transmitter and the receiver. Here, the pseudo noise string information is implemented as a sequence of pulse signals in symbol units, and one symbol has a size of 2 bits. However, the size of one symbol may be implemented to have a size of 4 bits or 8 bits.

The area separator 140 divides pseudo noise string information generated by the PN generator 130 into at least two areas. In this case, the counting unit 141 provided in the area separating unit 140 counts the number of symbols of the pseudo noise string information generated by the PN generating unit 130, and the area separating unit 140 counts the counting unit. When the value counted by 141 reaches the set value, it is implemented to distinguish pseudo-noise string information. In this case, a setting value for distinguishing pseudo noise string information may be set at the time of manufacture of a single carrier transmission system, and the setting value may vary according to a standard method applied thereto.

Here, the symbol size of the segment of the data stream after the insertion of the segment sync and pseudo-noise string information is implemented to have the same symbol size (836 symbols) as the size of the segment of the ADTB-T standard. However, the symbol size of the segment of the data stream is not limited thereto, and may be implemented to have the same symbol size (832 symbols) as that of the segment of the ATSC standard.

FIG. 6 is a diagram illustrating an example of a segment structure of data shown in FIG. 5. Referring to the drawing, the area separating unit 140 divides pseudo noise string information having 764 symbols into two regions having 382 symbols, based on the value counted by the counting unit 141. Here, the number of symbols of the pseudo noise sequence information is implemented as 764 as the total number of symbols of the pseudo noise sequence information in the segment according to the ADTB-T standard. In addition, in the present embodiment, the area separator 140 is configured by dividing pseudo noise string information having 764 symbols into two areas having the same symbol size.

FIG. 7 is a diagram illustrating another example of the segment structure of data according to FIG. 5, and FIG. 8 is a diagram illustrating another example of the segment structure of data according to FIG. 5. Referring to the drawing, the area separator 140 divides pseudo noise string information having the same symbol number as the number of symbols of the pseudo noise string information in the segment of the ADTB-T standard into two regions having different numbers of symbols. In the case of the figure, the area classification unit 140 is implemented by dividing the pseudo-noise string information into an area of 380 and 384 individual symbols. Here, the size of each divided area (the number of symbols 380 and 384) is to minimize the difference in the number of symbols between the areas to enable accurate channel estimation when channel estimation by correlation in a single carrier receiving system. As described above, in the case where the sizes of the respective areas of the divided pseudo-noise string information are different, the order in which the respective divided areas are inserted into the data stream does not matter much. That is, an area with 384 symbols may be inserted in front of an area with 380 symbols, and an area with 380 symbols may be inserted in front of an area with 384 symbols (see FIGS. 7 and 8).

FIG. 9 is a diagram illustrating still another example of the segment structure of data shown in FIG. 5. Referring to the figure, the pseudo-noise sequence information is composed of 768 symbols, the number of symbols of the segment is implemented as 836 symbols equal to the number of segment symbols of the ADTB-T standard. In this case, the area separating unit 140 divides pseudo noise string information having 768 symbols into two areas having 384 symbols, based on the value counted by the counting unit 141. Here, the number of four symbols increased compared to the number of symbols of pseudonoise string information of the segment of the ADTB-T standard reduces the number of symbols of system information in the segment, thereby converting the total number of segment symbols into segments of the ADTB-T standard. It is equal to the number of symbols.

FIG. 10 is a diagram illustrating an example of pseudo noise string information shown in FIG. 5. Referring to the drawings, the pseudo noise string information includes a preamble region, a pseudo noise sequence information region having 255 symbols, and a postamble region. Here, the preamble region and the postamble region are performed in a manner of replacing a part of the pseudo noise string information for rapid signal processing. In addition, the number of symbols of 255 is considered to be inserted into the data stream by dividing the area of 511 symbols of the ATSC standard or the ADTB-T standard into two areas, and thus the number of symbols of 255 may be changed.

In the case of the area of pseudo noise string information having 384 symbols, the preamble area copies 25 symbols of the latter half of the number of 255 pseudo noise string information generated by the PN generation unit 130 to obtain 255 symbols. It is inserted in front of the pseudo noise string region, and the postamble region copies 104 symbols of the first half of the 255 pseudo noise string information generated by the PN generation unit 130, followed by 255 pseudo noise sequence regions. Implemented by inserting

In addition, in the case of the area of pseudo noise sequence information having 382 symbols, the preamble region copies the 23 symbols of the latter half of the number of symbols of 255 pseudo noise sequence generated by the PN generation unit 130 and the number of symbols. Inserted in front of the 255 pseudo-noise sequence, the postamble region copies 104 symbols of the first half of the 255 pseudo-noise sequence information generated by the PN generation unit 130. It is implemented by inserting after.

In addition, in the case of the area of pseudo noise sequence information having 382 symbols, the preamble region copies the last 25 symbols of the number of symbols 255 pseudo noise sequence generated by the PN generation unit 130 to form a symbol number of 255. It is inserted in front of the pseudo noise string regions, and the postamble region copies the 102 symbols of the first half of the 255 pseudo noise string information generated by the PN generation unit 130, and thus the number of symbols is 255 pseudo noise sequence. It can also be implemented by inserting it after.

In addition, in the case of the area of pseudo noise sequence information having 380 symbols, the preamble area copies the 23 symbols of the latter half of the number of symbols of 255 pseudo noise sequence generated by the PN generation unit 130, and the number of symbols. Inserted in front of the 255 pseudo-noise sequence, the postamble region copies the 102 symbols of the first half of the 255 pseudo-noise sequence information generated by the PN generation unit 130, and the number of symbols 255 pseudo-noise sequence. It is implemented by inserting after.

In addition, in the case of the area of pseudo noise sequence information having 380 symbols, the preamble region copies the last 25 symbols of the number of symbols generated by the PN generation unit 130 of 255 pseudo noise sequence information. Inserted in front of the 255 pseudo-noise sequence, the postamble region copies 100 symbols of the first half of the 255 pseudo-noise sequence information generated by the PN generation unit 130, and the number of symbols 255 pseudo-noise sequence. It can also be implemented by inserting it after.

In addition, in the case of the area of pseudo noise sequence information having 380 symbols, the preamble region copies the 21 symbols of the latter half of the number of symbols of 255 pseudo noise sequence generated by the PN generation unit 130. Inserted in front of the 255 pseudo-noise sequence, the postamble region copies 104 symbols of the first half of the 255 pseudo-noise sequence information generated by the PN generation unit 130. It can also be implemented by inserting it after.

After trellis coding by the trellis encoder 125, the mux 150 inserts the pseudo-noise sequence information separated by the segment sync and the area separator 140 into the data stream.

The pilot inserter 160 inserts a pilot into a transmission signal into which segment sync and pseudo noise string information are inserted.

The modulator 170 modulates the transmission signal received from the pilot inserter 160 using an OQAM modulation scheme. The RF converter 180 converts the modulated transmission signal by RF and transmits the converted transmission signal through an antenna.

FIG. 11 is a diagram illustrating a correlation between a frame synchronization signal and received data in the single carrier receiving system of FIG. 5. Referring to the drawings, the pseudo-noise sequence information is divided into two regions having the same number of symbols and inserted into the data stream, or divided into two regions having no significant difference in the number of symbols and inserted into the data stream, thereby receiving a single carrier receiving system. It is possible to remarkably reduce jitter in the synchronization acquisition interval at, thereby improving the reception performance of a single carrier receiving system.

According to the present invention, it is possible to significantly reduce the jitter generation in the synchronization acquisition interval in the single carrier receiving system, thereby improving the reception performance of the single carrier receiving system.

Although the above has been illustrated and described with respect to the preferred embodiment of the present invention, the present invention is not limited to the specific embodiment described above, it is usually in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Anyone skilled in the art can make various modifications, as well as such modifications are within the scope of the claims.

Claims (16)

  1. delete
  2. In a single carrier transmission system for inserting and transmitting pseudo-noise sequence information, which is synchronization information for synchronization between a transmitter and a receiver, into a single carrier data stream,
    A pseudo noise string information generator for generating the pseudo noise string information;
    An area separator for dividing the pseudo noise string information generated by the pseudo noise string information generating unit into at least two areas; And
    A mux for continuously inserting and multiplexing each region of the pseudonoise string information separated by the region separator into the data stream;
    The area separator is,
    And a counting unit for counting the number of symbols of the pseudo noise thermal information generated by the pseudo noise thermal information generating unit.
    And when the value counted by the counting unit reaches a set value, the area of the pseudo noise string information is classified.
  3. 3. The method of claim 2,
    The size of the data stream into which the pseudo-noise string information is inserted is implemented according to the ADTB-T standard.
  4. The method of claim 3,
    And the area separator divides the pseudo-noise sequence information into two areas having the same number of symbols based on the value counted by the counting unit.
  5. The method of claim 4, wherein
    And the area divider divides the pseudo-noise sequence information into areas having 382 symbols.
  6. The method of claim 5,
    Each area of the pseudonoise string information divided by the area divider includes 255 symbols, a preamble inserted in front of the 255 symbols by copying the last 23 symbols of the 255 symbols, and the 255 symbols. A single carrier transmission system comprising a postamble inserted after the 255 symbols by copying the 104 symbols of the first half.
  7. The method of claim 5,
    Each area of the pseudonoise string information divided by the area divider includes 255 symbols, a preamble copied in front of the 255 symbols by copying the last 25 symbols of the 255 symbols, and the 255 symbols. A single carrier transmission system comprising a postamble inserted after the 255 symbols by copying the 102 symbols of the first half.
  8. The method of claim 3,
    And the area separator divides the pseudo-noise sequence information into two areas having different numbers of symbols based on a value counted by the counting unit.
  9. The method of claim 8,
    And the area separator divides the pseudo-noise string information into an area of 380 and 384 areas of each symbol.
  10. The method of claim 9,
    And the mux inserts an area having 384 symbols first when inserting the pseudo-noise string information into the data stream.
  11. The method of claim 9,
    And the mux inserts an area having 380 symbols first when inserting the pseudo-noise string information into the data stream.
  12. The method of claim 4, wherein
    And the area divider divides the pseudo-noise sequence information into areas having 384 symbols.
  13. The method according to any one of claims 9 to 11,
    In the area where the number of symbols is 380, 255 symbols, a preamble inserted in front of the 255 symbols by copying the last 23 symbols of the 255 symbols, and the first 102 symbols of the 255 symbols are copied. And a postamble inserted after the 255 symbols.
  14. The method according to any one of claims 9 to 11,
    In the area where the number of symbols is 380, 255 symbols, 25 symbols of the latter half of the 255 symbols are copied, a preamble inserted in front of the 255 symbols, and 100 symbols of the first half of the 255 symbols are copied. And a post-amble inserted after the 255 symbols.
  15. The method according to any one of claims 9 to 11,
    In the area where the number of symbols is 380, 255 symbols, a preamble inserted in front of the 255 symbols by copying the last 21 symbols of the 255 symbols, and the first 104 symbols of the 255 symbols are copied. And a postamble inserted after the 255 symbols.
  16. The method according to any one of claims 9 to 12,
    In the area of 384 symbols, the 255 symbols, the 25 symbols of the latter half of the 255 symbols are copied, the preamble inserted in front of the 255 symbols, and the 104 symbols of the first half of the 255 symbols. And a postamble inserted after the 255 symbols.
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