Device and method for header transmission in wireless communication system

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication systems. A method of transmitting a SA header includes steps of determining a SA header, constructed in a unit of subblocks, according to a frequency band to be used for transmitting information, determining a sequence for reducing a PAPR of the SA header in consideration of at least one frequency band, a segment identifier (ID), and the number of antennae transmitting the SA header, updating the SA header using the determined sequence, and transmitting the updated SA header to a receiving end.

EFFECT: apparatus and method for reducing a peak to average power ratio (PAPR) of a secondary advanced (SA) header in a wireless communication system are disclosed.

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The technical field to which the invention relates

The present invention relates to a header of the wireless communication system. More specifically, the present invention relates to a device and method for reducing peak power to the average (PAPR) secondary advanced (SA) header to distinguish cell ID) based positioning in a wireless communication system with orthogonal multiplexing and frequency division (OFDM).

The level of technology

Many wireless technologies proposed as opportunities to provide high-speed mobile communication. Among them OFDM today is recognized as a technology for next generation wireless communication. The OFDM scheme is a scheme for transmitting data using many carriers. However, in the case of using the OFDM scheme, there is a problem with the fact that the transmitting end had a high PAPR characteristic, as it transmits one data stream using multiple subcarriers.

In the case of using the OFDM scheme, a base station (BS) transmits the channel synchronization for time synchronization and identification of the BS in a mobile station (MS). In this paper, the sync channel is called the header.

Using the sync channel, received from the BS, the MS may receive the synchronization in time with BS and is great for the th BS, belongs to MS. For example, the IEEE (Institute of electrical and electronics engineers) 802.16m standard, which adopts the technology of OFDM uses a primary advanced (PA) header and the SA header. In this document PA header is used for synchronization in time and the SA header is used to identify the BS.

When the BS transmits the SA header for time synchronization BS and BS identification surpasses it, BS converts a sequence consisting of a header, an OFDM symbol and transmits the OFDM symbol. Thus, there is a problem that the PAPR of the SA header passed BS is high.

The invention

Solution

An aspect of the present invention is to specify at least the problems and/or disadvantages and provide at least the advantages described below. Accordingly, an aspect of the present invention is to provide a device and method for reducing peak power to the average (PAPR) secondary advanced (SA) header in a wireless communications system.

Another aspect of the present invention is to provide a device and method for the design of block sequence masking (BCS) to reduce PAPR and SA header in a wireless communications system.

Another aspect of the present izobreteny which is to provide a device and method for designing BCS to reduce the PAPR of the SA header in the case of TD (selection of colors) in a wireless communications system.

The above aspects are addressed by providing a device and method for the transfer of title in the wireless communications system.

According to the aspect of the present invention provides a method of transmitting SA header in a wireless communications system. The method includes defining a SA header created in the unit of sub-blocks, in accordance with the frequency range that you want to use for transmitting information defining a sequence for reducing the PAPR of the SA header, when considering at least one frequency range, the ID of the segment and multiple antennas transmitting the SA header, to update the SA header, using a specific sequence, and to transmit the updated SA header at the receiving end.

According to another aspect of the present invention provided with the device to send SA header in a wireless communications system. The device includes a generator header generator sequences, the controller and the transmitter. Generator header defines the SA header created in the unit of sub-blocks according to the frequency range that you want to use to transfer information. The generator sequence defines the sequence to reduce the PAPR of the SA header when considering, at least, real the frequency range, Segment ID and multiple antennas transmitting the SA header. The controller updates the SA header, using a specific sequence. The transmitter transmits the updated SA header at the receiving end.

Other aspects, advantages and important features of the invention will become obvious to a person skilled in the art from the subsequent detailed description, which, taken together with the accompanying drawings, discloses exemplary embodiments of the invention.

Brief description of drawings

The above and other aspects, features and advantages of certain exemplary embodiments of the present invention will become more apparent from the following description considered together with the attached drawings, on which:

Fig. 1 is a diagram illustrating the creation of a secondary advanced (SA) header in a wireless communication system according to an exemplary variant of implementation of the present invention;

Fig. 2 is a diagram illustrating the creation of a SA header when used TD (selection of colors) in the wireless communication system according to an exemplary variant of implementation of the present invention;

Fig. 3 is a flowchart of the operational sequence of the method, illustrating a procedure for transmitting the SA header in a wireless communications system with the estimated according to a variant of implementation of the present invention; and

Fig. 4 is a block diagram illustrating the creation of a transmitting end to transmit SA header according to an exemplary variant of implementation of the present invention.

It should be noted that in all the drawings the same reference numbers are used to display the same or similar elements, features and structures.

The best option of carrying out the invention

The subsequent description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention, as defined by the claims and its equivalents. It includes various specific details to assist in that understanding, but they are only approximate. Accordingly, specialists in the art will recognize that various changes and modifications to the embodiments described herein may be made without deviating from the scope and essence of the invention. Also, descriptions of well-known functions and structures are omitted for clarity and brevity.

Words and terms used in the following description and the claims, is not limited to the bibliographical meanings, but are used by the inventor to enable a clear and consistent understanding of the invention. Therefore, SP is gaining strength in the art should be obvious, that the subsequent description of exemplary embodiments of the present invention provided only for illustrative purposes and not to limit the invention, as defined by the appended claims and their equivalents.

It should be understood that the only form of definite, indefinite articles include numerous references, until the context clearly does not prescribe otherwise. Thus, for example, reference to "a surface component includes one or more of these surfaces.

Using the term "mainly" refers to that cited characteristic, parameter, or value need not be achieved, but that deviations or changes, including for example, tolerances, measurement error, limits of measurement accuracy and other factors known to specialists in this field of technology can occur when the value does not prevent the effect, for the provision of which is the description.

Below is described a technology for reducing the peak power to the average (PAPR) secondary advanced (SA) header in a wireless communication system according to an exemplary variant of implementation of the present invention.

The following description is made assuming that the wireless communication system used is eshet the IEEE (Institute of electrical and electronics engineers) 802.16m standard, but a sample implementation of the present invention is equally applicable to other wireless communication systems using OFDM (orthogonal multiplexing frequency division).

The following description is made assuming that the wireless communication system uses FFT (fast Fourier transform) size 512 when the used frequency range of 5 MHz, uses an FFT size of 1024 in the case when the used frequency range 10 MHz, and uses FFT size 2048 when used frequency range of 20 MHz. Thus, in the following description, the size of the FFT corresponds to a specific frequency range.

In the following description frequency range and bandwidth of the channel used in the same value.

Fig. 1 is a diagram illustrating the creation of a SA header in the wireless communication system according to an exemplary variant of implementation of the present invention.

Referring to Fig. 1, when the FFT size is '512', SA header 100 consists of 8 sub-blocks (a, b, c, d, e, f, g and h). This document contains the binary sequence or the Quaternary sequence. For example, in the case where each sub-block consists of the binary sequence, the binary sequence may have a length of '18'. For another example, in the case when the and each sub-block consists of the Quaternary sequence, the subunit may consist of modulated symbols, which are obtained by modulating the binary sequence in the modulation scheme QPSK (quadrature phase shift keying).

When the FFT size is expanded, SA header, you want to use in the FFT of the increased size is created through repetition of the 8 sub-blocks of the SA header 100. That is, when the frequency range is extended, SA header, which must be used in a wider frequency range, is created through repetition of the sub-blocks of the SA header 100 is used at 5 MHz. For example, when the FFT size is expanded to '1024', SA header 110 is created using only the repetition of the 8 sub-blocks of the SA header 100 used in the FFT size of 512. For another example, when the FFT size is expanded to '2048', SA header 120 is created through repetition of the 8 sub-blocks of the SA header 100 used in FFT size 512 three times.

As mentioned above, the SA header is created using the repeated sub-blocks. In this case, the transmitting end designs block sequence masking (BCS) to reduce the peak power to the average (PAPR) SA header, the sub-blocks which are repeated, and uses the projected BCS SA header. In an exemplary embodiment, each bit BCS is used to to the each sub block, constituting the SA header. Thus, when the SA header with bandwidth 5 MHz, consists of 5 sub-blocks, BCS consists of 8 bits. And when the SA header with bandwidth 10 MHz, consists of 16 sub-blocks, BCS consists of 16 bits. When the SA header with bandwidth 20 MHz, consists of 32 sub-blocks, BCS consists of 32 bits.

When considering the size of the FFT segment ID (ID) and the number of antennas transmitting the SA title, BCS is designed, as shown in table 1 below.

Table 1 shows the hexadecimal representation for BCS. For example, when the FFT size is '512', segment ID equal to '0' and SA header is transmitted using one antenna, BCS SA header is equal to '00' in hexadecimal representation. In this document hexadecimal '00' may bittage expressed as a binary '00000000'. At this point, the transmitting end uses every bit of BCS for each subblock constituting the SA header. For example, the first bit '0' BCS is used for sub-blocks 'a', constituting the SA title used in FFT size 512, the second bit '0' is used for sub-blocks 'b'and the third bit '0' is used for sub-blocks 'c' and so on from the condition that the transmitting end consistently used every bit of BCS for each subblock constituting the SA header.

When the sub-block consists of the binary sequence, the transmitting end converts '0' of the number of sequence values of each subblock constituting the SA header, and bit values of the BCS '1' and translates '1' to '-1'. After that, the transmitting end multiplies the converted sequence value of each subblock constituting the SA header, converted bit value BCS SA header to update the SA header, reducing PAPR SA header.

On the other hand, when the sub-block consists of the Quaternary sequence, the transmitting end can use every bit BCS SA header for each subblock constituting the SA header, to update the SA header, reducing PAPR SA header.

Using TD (selection of colors), the wireless communication system can maintain the same interval subcarrier in a different frequency range.

In General the m the FFT size is doubled. That is, the FFT size increases with '512' to '1024' and increasing '1024' to '2048'.

Thus, the wireless communication system can maintain the same interval subcarrier using the FFT size of 512 bits and the frequency range of 5 MHz, as when using a FFT size of 1024, and the frequency range 10 MHz.

However, in the case of use of the frequency range of 8.75 MHz, the transmitting end can transmit information in the range of 8.75 MHz, using an FFT size of 1024 in the same subcarrier interval as the range of 5 MHz or 10 MHz. But with schema TD transmitting end can transmit information in the range of 8.75 MHz, using the same subcarrier interval as the range of 5 MHz or 10 MHz. For example, since the transmitting end using a frequency range of 8.75 MHz, and transmits the information only for the range of 8.75 MHz, excluding other ranges 10 MHz, the transmitting end can have the same subcarrier interval as the range of 10 MHz. That is, only by using the conversion information corresponding to the frequency range of 8.75 MHz among the FFT used for data transmission, the transmitting end can have the same subcarrier interval as the range of 10 MHz.

As described above,in the case when using the TD, the transmitting end can use the SA header generated in Fig. 1 above, to identify the BS. For example, when the used frequency range is equal to or greater than 5 MHz and less than 10 MHz, the transmitting end uses the SA header with a FFT size of 512. For example, when the used frequency range equal to or more than 10 MHz and less than 20 MHz, the transmitting end uses the SA header 110, with the FFT size of 1024. In this case, the transmitting end can use BCS designed in table 1 above, to reduce the PAPR of the SA header 110.

For another example, when used TD, the transmitting end can use the SA header generated in Fig. 2 below.

Fig. 2 is a diagram illustrating the creation of a SA header when used TD (selection of colors) in the wireless communication system according to an exemplary variant of implementation of the present invention.

Referring to Fig. 2, when the FFT size is '512', SA header 200 consists of 8 sub-blocks (a, b, c, d, e, f, g and h). In this document each subblock consists of the binary sequence or the Quaternary sequence. For example, in the case where each sub-block consists of the binary sequence, the binary sequence may have a length of '18'. For another example, when each odbl is to consist of the Quaternary sequence, the subunit may consist of modulated symbols, which are obtained by modulating the binary sequence in the scheme of QPSK modulation.

In the case of using a frequency range that is greater than 5 MHz and less than 10 MHz using TD, sequence SA headings for selection of tones obtained by removing the most distant second subblock SA header 210 subcarrier direct current (DC) on both sides. In this document SA header 210 is used in the FFT size of 1024. However, SA header, which has a frequency range using TD, can be either expressed in the format of the extension SA header lower reference frequency band in the block or subblock in the format of delete SA header upper reference frequency band in the block sub-block. In more detail, the SA header for the frequency range that is greater than 5 MHz and less than 10 MHz, using TD, can be either expressed in format extensions at both ends, centerwas around DC in the block sub-blocks in the first SA header 200 used in the FFT size of 512 or in the form of removal of the farthest sub-blocks at both ends around DC in the second SA header 210. In the following description is made of the expression with reference to the format of the extension in the block sub-block based on the first SA header 200, but it is the same as the expression form is but a drop in the block sub-block based on the second SA header 210. For example, in the case where the frequency range is greater than 5 MHz and equal to or less than 6.25 MHz, SA header 202 is created by adding one sub-block to each of both ends of the first SA header 200. For example, in the case where the frequency range is greater than 6.25 MHz and equal to or less than 7.5 MHz, SA header 204 is created by adding two sub-blocks to each of both ends of the first SA header 200. For example, in the case where the frequency range is greater than 6.25 MHz and equal to or less than 7.5 MHz, SA header 206 is created by adding two sub-blocks to each of both ends of the first SA header 200.

In the case when the size of the FFT is equal to '1024', the second SA header 210 is created by using a single repetition of the 8 sub-blocks constituting the first SA header 200.

In the case of using a frequency range that is greater than 10 MHz and less than 20 MHz using TD, sequence SA headings for selection of tones obtained by removing the most distant third subblock SA header 220 DC subcarrier on both sides. In this document, the third SA header 220 is used in the FFT size of 2048. In the following description is made of the expression of the expansion-block sub-block based on the second SA header 210, but is the same as the delete expression in the second block sub-blocks based on the third SA zagalo the ka 220. For example, in the case where the frequency range is greater than 10 MHz and equal to or less than that of 11.25 MHz, SA header is created by adding one sub-block to each of both ends of the second SA header 210.

In the case when the size of the FFT is equal to '2048', the third SA header 220 is created by using a threefold repetition of the 8 sub-blocks constituting the first SA header 200.

In the above exemplary embodiment of the present invention, when used TD, SA header is created using the extensions in the block of two sub-blocks and, hence, the frequency range extends in a block of 1.25 MHz. Thus, the frequency ranges, which have a block of 1.25 MHz, use the same SA header. In more detail, when the used frequency range of 7 MHz, the frequency range that is greater than 6.25 MHz and equal to or less than 7.5 MHz, uses the same SA header 204, and a frequency range of 7 MHz.

As described above, when used TD, caption SA is deleted in the unit of sub-blocks. At this point, the SA header can be represented in the format extension in the block sub-block based on the lower bearing SA header. In this case, the transmitting end plans BCS to reduce the PAPR of the SA header and uses intended BCS SA header. That is, the transmitting end uses every bit of BCS for the each sub-block, constituting the SA header. Thus, when used TD, BCS planned by the extension block of the two sub-blocks. For example, when the BCS for the SA header 200 frequency range 5 MHz consists of 8 bits, BCS SA header 202 used in the frequency range that is greater than 5 MHz and equal to or less than 6.25 MHz, consists of 10 bits. In addition, BCS SA header 204 used in the frequency range that is greater than 6.25 MHz and equal to or less than 7.5 MHz, consists of 12 bits. And BCS SA header 206 used in the frequency range that is greater than 7.5 MHz and equal to or less than 10 MHz, consists of 14 bits.

As described above, when used TD, BCS may consist of 10 bits, 12 bits or 14 bits, depending on the frequency range. But, as shown in table 2 below, BCS expressed with 16 bits. Thus, the BCS is set to a binary value of '0' for the remaining bits excluding the bits (for example, 10 bits, 12 bits or 14 bits), components of the BCS depending on the frequency range.

For another example, when TD is used in the frequency range below 20 MHz, BCS expanded and consists of 18 bits 20 bits 22 bits, 24 bits, 26 bits, 28 bits or 30 bits in the same manner as described above. But, as shown in table 2 below, the BS is expressed using 32 bits. Thus, the BCS is set to a binary value of '0' for the remaining bits excluding the bits (for example, 18 bits 20 bits 22 bits, 24 bits, 26 bits, 28 bits or 30 bits)constituting the BCS itself depending on the frequency range.

When used TD when considering bandwidth (BW), segment ID, and the number of antennas transmitting the SA title, BCS is planned, as shown in table 2 below.

Table 2 shows the hexadecimal representation of the BCS. For example, when used BW equal to 6.25 MHz, segment ID equal to '0' and SA header is transmitted using one antenna, BCS SA header is '0AA0' in hexadecimal representation. In this document hexadecimal '0AA0' can be represented as a binary '0000 1010 1010 0000'.

In the above exemplary embodiment, the transmitting end uses the newly designed BCS SA header, expandable via TD.

According to another exemplary variant of implementation of the present invention, the transmitting end can selectively be used from BCS BCS designed in table 2 above, according to BW, SA transmitting the header or the number of sub-blocks, used for data transfer. For example, in the case in which the used frequency range is 10 MHz, but BW, transmitting the SA header, equal to 6.25 MHz, the transmitting end can use BCS to 6.25 MHz. For another example, when the used frequency range Raven MHz, but the number of sub-blocks transmitted SA header is the same as the number of subblocks corresponding to 6.25 MHz, the transmitting end can use BCS to 6.25 MHz.

The following description is made for an exemplary method of reducing the PAPR of the SA header using BCS and transfer SA header in the transmitting end.

Fig. 3 is a flowchart of the operational sequence of the method, illustrating a procedure for transmitting the SA header in the wireless communication system according to an exemplary variant of implementation of the present invention.

Referring to Fig. 3, at step 301, the transmitting end determines the sequence SA header according to the frequency range that should be used for information transfer. For example, as illustrated in Fig. 1, the transmitting end repeats the subblock constituting the SA title 5 MHz for the formation of the SA header of the respective frequency range. For another example, as illustrated in Fig. 2, the transmitting end receives the sequence SA headings for selection of tones by removing the most distant of the sub-blocks of the reference bandwidth DC subcarrier on both sides.

After determining the sequence SA header transmit end proceeds to step 303 and identifies the size of the FFT, segment ID, and the number of antennas transmitting the SA header. This is the document the size of the FFT corresponds to a specific frequency range.

After that, the transmit end proceeds to step 305 and determines whether you have used TD.

When used TD, the transmit end proceeds to step 307 and selects the BCS to reduce the PAPR of the SA header from the table BCS created in the table 2 above, when considering the size of the FFT, segment ID, and the number of antennas transmitting the SA header.

On the other hand, in the case when not used TD, the transmit end proceeds to step 313 and selects the BCS to reduce the PAPR of the SA header from the table BCS created in the table 1 above, when considering the size of the FFT, segment ID, and the number of antennas transmitting the SA header.

After selecting the BCS for the SA header transmit end proceeds to step 309 and uses each bit constituting the BCS for each subblock constituting the SA header. For example, if it is assumed that the frequency range is 5 MHz, the segment ID is '0' and SA header, which was transmitted using a single antenna, consists of 8 sub-blocks (a, b, c, d, e, f, g and h), BCS has a binary value '11011110'. At this point, the transmitting end uses every bit of BCS for each subblock constituting the SA header. That is, the transmitting end uses the first bit '1' BCS for sub-blocks 'a', constituting the SA header, uses the second bit is '1' for sub-block 'b', uses the third bit is '0' for subsection 'c' and so on.

After using BCS for SA header, the transmitting end of regedit to step 311 and transmits the SA header, using BCS for the receiving end.

After that, the transmitting end terminates the procedure according to an exemplary variant of implementation of the present invention.

In the above exemplary embodiment of the present invention, the transmitting end selects to reduce the PAPR of the SA header when considering the size of the FFT, segment ID, and the number of antennas transmitting the SA header.

According to another exemplary variant of implementation of the present invention, the transmitting end can choose BCS to reduce the PAPR of the SA header when considering BW, transmitting the SA header, segment ID, and the number of antennas transmitting the SA header.

According to another exemplary variant of implementation of the present invention, the transmitting end can choose BCS to reduce the PAPR of the SA header when considering the number of sub-blocks transmitted SA header, segment ID, and the number of antennas transmitting the SA header.

In the case of each bit of the BCS for each subblock constituting the SA header, as described above, the transmitting end converts '0' among the values of the sequence of each subblock constituting the SA header, and bit values of the BCS '1' and translates '1' to '-1'. After that, the transmitting end multiplies the converted sequence value of each subblock SA header on the converted bit value BCS SA header to update the surveillance SA header, reducing PAPR SA header.

The following description is made to approximate the transmitting end to reduce the PAPR of the SA header using BCS and transfer SA header.

Fig. 4 is a block diagram illustrating the creation of a transmitting end to transmit SA header according to an exemplary variant of implementation of the present invention.

Referring to Fig. 4, the transmitting end includes an antenna switch 400, a receiver 410, a controller 410 and a transmitter 430.

According to the scheme duplex transmission antenna switch 400 transmits the transmission signals provided from the transmitter 430, via an antenna, and provides a reception signal from the antenna to the receiver 410.

The receiver 410 includes a radio frequency (RF) processor 411, analog-to-digital Converter (ADC) 413, a demodulator decoder 415 and 417.

RF processor 411 converts the RF signal provided from the antenna switch 400, the analog signal direct transmission. ADC 413 converts the analog signal provided from the RF processor 411, digital sampling data.

OFDM-demodulator 415 converts the data sampling time domain provided from the ADC 413 data in the frequency domain using the Fourier transform (FT). For example, OFDM-demodulator 415 converts the data sampling time domain data in the frequency domain using fast converted what I Fourier transform (FFT).

The decoder 417 demodulates and decodes the signal provided from the OFDM-demodulator 415 according to the modulation level (i.e. the level of the modulation scheme and coding (MCS)).

The controller 420 controls the overall operation of the transmitting end and controls the transfer of information. For example, the controller 420 controls the use of BCS, supplied from a generator 424 BCS, SA header, supplied from a generator 422 headers. In an exemplary embodiment, the controller 420 uses each bit constituting the BCS for each subblock constituting the SA header. For example, it is assumed that when the frequency range is 5 MHz, the segment ID is '0' and SA header, which was transmitted using a single antenna, consists of 8 sub-blocks (a, b, c, d, e, f, g and h), BCS has a binary value of '00000000'. At this point, the controller 420 sequentially uses each bit BCS for each subblock constituting the SA header, analogous to the use of the first bit '0' BCS for sub-blocks 'a', constituting the SA header, using the second bit is '0' for the sub-blocks 'b' and uses the third bit is '0' for the sub-block 'c'.

When the controller 420 uses every bit of BCS for each subblock constituting the SA header, the controller 420 converts '0' among the values of the sequence of each subblock constituting the SA header, and bit values of the BCS '1' and the pre is Brazul '1' to '-1'. After that, the controller 420 multiplies the converted sequence value of each subblock SA header on the converted bit value BCS SA header to update the SA header, reducing PAPR SA header.

Generator 422 generates headers SA header to synchronize in time with the receiving end and the SA title for their own identification. For example, as illustrated in Fig. 1, the generator 422 header repeats the subblock constituting the SA header bandwidth 5 MHz to form the SA header of the respective frequency range. For another example, as illustrated in Fig. 2, the generator 422 generates headers sequence SA headings for selection of tones by removing the most distant of the sub-blocks of the reference bandwidth. At this point, the generator 422 receives data subblock constituting the SA header, from a storage device 426. In this document the size of the FFT corresponds to a specific frequency range.

Generator 424 BCS BCS chooses to SA header generated in the generator 422 titles among BCS included in the table BCS provided from the storage device 426, when considering the size of the FFT, segment ID, and the number of antennas transmitting the SA header. For example, when TD was not used, the generator 422 BCS vybere the BCS to reduce the PAPR of the SA header from the table, BCS, created in the table 1 above, when considering the size of the FFT, segment ID, and the number of antennas transmitting the SA header. In this document the size of the FFT corresponds to a specific frequency range.

On the other hand, in the case when TD was used, the generator 422 BCS BCS chooses to reduce the PAPR of the SA header from the table BCS created in the table 2 above, when considering the size of the FFT, segment ID, and the number of antennas transmitting the SA header.

Storage device 426 stores the information of the sub-blocks to form the SA title and BCS table.

The transmitter 430 includes an encoder 431, OFDM-modulator 433, digital to analog Converter (DAC) 435 and RF processor 437.

Encoder 4310 encodes and modulates the transmission signals or control information according to the corresponding modulation levels (i.e. level MCS). For example, the encoder 431 encodes and modulates the SA header using BCS provided from the controller 420 according to the respective modulation levels (i.e., an MCS level).

OFDM-modulator 433 converts the frequency domain data provided from the encoder 431, the data sampling time domain (i.e. OFDM symbols) using the inverse Fourier transform (IFT). For example, OFDM-modulator 433 converts the frequency domain data sample time domain (i.e. OFDM symbols) by using the inverse fast Fourier transform (IFT).

DAC 435 convert Soviet sampling data, provided from the OFDM modulator 433 in the analog signal. RF processor 437 converts the analog signal to a direct transfer provided from the DAC 433, RF-signal.

In the above exemplary embodiments, the implementation of the wireless communication system can support the same subcarrier interval in different frequency range with TD. At this point, the inverse of the subcarrier interval is the length of characters and, therefore, the interval of the subcarrier can be represented by the length of characters. That is, the wireless communication system can maintain the same length of characters in a different frequency range with TD.

In addition, in the above exemplary embodiments, the implementation of the generator 424 BCS BCS chooses to SA header generated in the generator 422 titles among BCS included in the table BCS provided from the storage device 426, when considering the size of the FFT, segment ID, and the number of antennas transmitting the SA header.

In accordance with an exemplary embodiment of the present invention the generator 424 BCS can choose BCS SA header generated in the generator 422 titles among BCS included in the table BCS provided from the storage device 426, when considering BW, transmitting the SA header, segment ID, and the number of antennas transmitting the SA header.

As described above, exemplary embodiments of the present invention are mainly to reduce the PAPR of the SA header by passing SA header using BCS, designed to reduce the PAPR of the SA header in a wireless communications system.

While the invention shown and described with reference to certain exemplary embodiments of the specialists in the art will be understood that it can be made various changes in form and content without deviating from the essence and scope of the invention as defined by the appended claims and its equivalents.

1. A method of transferring a secondary advanced (SA) header in a wireless communication system, the method contains the steps that
define SA header generated in the unit of sub-blocks according to the frequency band to be used for transmission of information;
determine the sequence to reduce the peak values of the Oia power to the average (PAPR) SA header when considering, at least one frequency range, the ID of the segment and the number of antennas transmitting the SA header;
update SA header, using a specific sequence; and
transmit the updated SA header at the receiving end.

2. The method according to p. 1, in which the definition of SA header contains the time that
repeat 8 sub-blocks comprising at least one sequence in accordance with the frequency range that you want to use to transmit information; and
form SA the title of the corresponding frequency range.

3. The method according to p. 1, which when used selection of tones (TD), the definition of SA header contains the stage at which
form SA header to support the allocation of tones by removing the most distant of the sub-blocks of the reference bandwidth DC subcarrier on both sides.

4. The method according to p. 3, in which the SA header reference bandwidth includes at least one of the SA header bandwidth of 10 MHz and SA header bandwidth of 20 MHz.

5. The method according to p. 1, in which the sequence contains stages, which are:
identify the use or non-use of TD;
choose any one of the at least two tables that contain information about the sequence to reduce the PAPR of the SA header could be the cost from the use or non-use of TD; and
select the sequence to reduce the PAPR of the SA header from the selected table when considering at least one frequency range, segment ID, and the number of antennas transmitting the SA header.

6. The method according to p. 5, in which, in the case when not in use TD, select table contains the following tables:

7. The method according to p. 5, which, when used TD, table selection includes a selection table that is created in the following table:

8. The method according to p. 1, in which the header is updated SA contains the multiplication of the sequence value of each subblock constituting the SA header, each bit sequence to reduce the PAPR of the SA header and update SA header.

9. The method according to p. 8, in which the update SA header contains the time that:
convert '0' among the values of the sequence of each subblock constituting the SA header, and bit values of the sequence to reduce the PAPR of the SA header to '1' to convert '1' to '-1';
multiply the converted sequence value of each subblock constituting the SA title on every converted bit sequence to reduce the PAPR of the SA header; and
update SA header.

10. Device for transmitting a secondary advanced (SA) the reasons of the WHC in a wireless communication system, the device, containing:
generator headers to determine the SA header created in the unit of sub-blocks according to the frequency band to be used for transmission of information;
the generator sequences to determine sequence to reduce the peak power to the average (PAPR) SA header when considering at least one frequency range, the ID of the segment and the number of antennas transmitting the SA header;
the controller to update the SA header using a specific sequence; and
a transmitter for transmitting the updated SA header at the receiving end.

11. The device according to p. 10, in which the definition of SA header contains
the repetition of the 8 sub-blocks comprising at least one sequence in accordance with the frequency range that you want to use to transmit information; and
the formation of the SA header of the respective frequency range.

12. The device according to p. 10, which, when used selection of tones (TD), the generator generates headers SA header to support the allocation of tones by removing the most distant of the sub-blocks of the reference bandwidth DC subcarrier on both sides.

13. The device according to p. 12, in which the SA header reference bandwidth content is t, at least one of the SA header bandwidth of 10 MHz and SA header bandwidth of 20 MHz.

14. The device according to p. 10, in which the generator sequence selects the sequence to reduce the PAPR of the SA header of any one table, which is selected depending on the use or non-use of TD among at least two tables containing information about the sequence to reduce the PAPR of the SA header, when considering at least one frequency range, segment ID, and the number of antennas transmitting the SA header.

15. The device according to p. 14, in which, in the case when not in use TD, select table contains the following tables:

16. The device 14, which, when used TD, table selection includes a selection table that is created in the following table:

17. The device according to p. 10, in which the controller multiplies the sequence value of each subblock constituting the SA header generated in the generator of headers, each bit sequence generated in the generator sequence, and updates the SA header.

18. The device according to p. 17, in which the controller converts '0' among the bits of the sequence generated in the generator sequence, and the values of posledovatelno and each sub-block, constituting the SA header generated in the generator headers, '1', and converts '1' to '-1', and
multiplies the converted sequence value of each subblock constituting the SA header generated in the generator of headers, each of the converted bit sequence generated in the generator sequence, and updates the SA header.

19. The device according to p. 10, further containing a storage device containing information from at least two sub-blocks constituting the SA header, and the sequence table to reduce the PAPR of at least one SA header.