KR20070094424A - Method of transform transmission of data and mobile communication terminal implementing same - Google Patents

Abstract

Provided are a data conversion transmission method using DCT and DM, and a mobile communication terminal implementing the same. According to an embodiment of the present invention, a method of transmitting data using a plurality of antennas and subcarriers includes: differential conversion (DM) for data of transmission bands of remaining antennas corresponding to data of transmission bands of a specific antenna among a plurality of antennas; Performing differential modulation and transmitting data for each transmission band of the reference antenna and the remaining antennas to a receiver, and another embodiment includes a Discrete Cosine Transform (DCT) for data to be transmitted. And performing the step of transmitting the converted data to a receiving side. In another embodiment, transmitting first data including data for each transmission band for each antenna to a receiving side, generating second data by adjusting the size of the first data, and generating the second data. Transmitting to the receiving side, wherein the first data and the second data are transmitted through MAC signaling and physical channel, respectively.

Description

Method for Modulating and Transmitting data and mobile communication terminal implementing the same

1 is a schematic diagram of an uplink data reporting procedure performed in a mobile communication system.

FIG. 2 is a data distribution diagram of antennas according to a first embodiment of a transform transmission method of data according to the present invention. FIG.

3 is a data distribution diagram according to an antenna of a second embodiment of a transform transmission method of data according to the present invention;

4 is a data distribution diagram according to an antenna of a third embodiment of a transform transmission method of data according to the present invention;

5A to 5C are antenna distribution charts for a fourth embodiment of a transform transmission method of data according to the present invention.

6 is a data distribution diagram according to antennas according to a fifth embodiment of a transform transmission method of data according to the present invention;

7 is a data distribution diagram according to an antenna of a sixth embodiment of a transform transmission method of data according to the present invention;

8 is a data distribution diagram according to an antenna of a seventh embodiment of a transform transmission method of data according to the present invention;

9A to 9C are antenna distribution charts for the eighth embodiment of a transform transmission method of data according to the present invention.

10A to 10D are conceptual views of a data distributed transmission scheme commonly applied to the above embodiments.

11d is a block diagram illustrating an internal configuration of a mobile communication terminal implementing the data conversion transmission method of the present invention.

The present invention relates to a method for transmitting and receiving data after converting data using DCT and DM, in particular, in a system in which data is transmitted and received using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, and a mobile communication terminal implementing the same. .

1 illustrates an overview of uplink data reporting performed in a mobile communication system. Various types of data may be reported to the base station, and in particular, channel quality information (hereinafter referred to as 'CQI') will be described as an example.

The UE 12 measures (101) the channel quality of the downlink using the signal transmitted from the base station 11, and selects the CQI value and / or the carrier-to-interference and noise ratio ( A Carrier to Interference and Noise Ratio (CINR) value is reported to the base station 11 through the uplink control channel (102). The base station 11 performs downlink scheduling such as mobile station selection and radio resource allocation using the reported CQI and / or CINR.

However, in a system that performs communication using a plurality of frequency bands, such as orthogonal frequency division multiplexing (OFDM), all frequency bands are reported only by reporting a single CQI corresponding to the entire frequency bands. It is not possible to accurately estimate the channel quality state of some frequency bands (divided frequency bands for CQI acquisition) constituting the C. Therefore, since downlink scheduling for each frequency band also cannot be performed, CQI should be reported for each frequency band.

On the other hand, the MIMO (Multi Input Multi Output) has been introduced for the efficient operation of OFDM, the transmission bandwidth is provided in a system using a plurality of antennas, while reporting to the base station 11 accordingly The amount of CQI to do is also increased. However, since there are limitations on the resources of the physical channel used for CQI reporting, it is difficult to sufficiently transmit the increased CQI.

The present invention has been proposed to solve the above problems, and its object is to efficiently utilize limited physical channel resources by minimizing the amount of information to be transmitted to the receiving side.

Furthermore, considering that the reference data for increasing the accuracy of the minimized information is relatively large, it is transmitted through MAC signaling, and the minimized information is transmitted through the physical channel. It is an object of the present invention to prevent in advance.

One embodiment of the present invention for achieving the above object relates to a method for transmitting data using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, the data per transmission band of the reference antenna of the plurality of antennas Performing differential modulation (DM) on the data of the transmission bands of the remaining antennas corresponding to the first transmission signal and transmitting first data corresponding to the data of the transmission bands of the reference antenna and the remaining antennas to the receiving side. It is done by

In this case, performing a 1D discrete cosine transform (1D-DCT) on the data of the reference antenna or a 2D discrete cosine transform (2D-DCT; 2 Dimensional-Discrete Cosine Transform) may be further included.

In addition, the differential conversion step is performed a predetermined number of times by a predetermined time unit, and the results of each of the above operations are collected to form a matrix (antenna number x N) matrix for each antenna (where 1 ≦ N ≦ number of transmission bands for each antenna). Performing a 2D Discrete Cosine Transform (2D-DCT) on the step and the constructed matrix may be further included. In this case, the discrete cosine transformed matrix is transmitted to a receiver.

The method may further include transmitting second data corresponding to data of the reference antenna and data of the remaining undifferentiated antenna to the receiving side, wherein the first data is transmitted through a physical channel, and the second data is transmitted. The data is preferably transmitted via Medium Access Control (MAC) signaling.

The reference antenna may correspond to an antenna having a minimum size of channel quality information or any one of the plurality of antennas, and the reference antenna may be periodically changed in a predetermined order set for each of the plurality of antennas. It may be.

Another embodiment of the present invention for achieving the above object relates to a method for transmitting data using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, the discrete cosine transform (DCT; Performing a Discrete Cosine Transform) and transmitting the transformed data to a receiver.

Here, the discrete cosine transform may be performed as a 1D discrete cosine transform (1D-DCT) on data of each antenna, or a 2D discrete cosine transform of a predetermined unit for data of all antennas. (2D-DCT; 2 Dimensional-Discrete Cosine Transform).

In the latter case, the data to be transmitted is generated a predetermined number of times in a predetermined time unit, and the results of each of the above operations are collected to obtain a matrix (antenna number x N) matrix for each antenna (where 1 ≦ N ≦ number of transmission bands for each antenna). Comprising a step of performing a two-dimensional discrete cosine transform (2D-DCT; 2D-DCT) for the constructed matrix and, in this case, the discrete cosine transformed matrix is transmitted to the receiving side.

Another embodiment of the present invention for achieving the above object relates to a method for transmitting data using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, the data consisting of data for each transmission band for each antenna And transmitting third data to the receiving side, adjusting the size of the third data to generate fourth data, and transmitting the generated fourth data to the receiving side.

The fourth data may be generated by performing differential modulation (DM) on current transmission band data corresponding to each transmission band data of the third data.

The method may further include performing a 2D discrete cosine transform (2D-DCT) of a predetermined unit on the third data before the third data transmission step.

In this case, the third data is transmitted through Medium Access Control (MAC) signaling, and the fourth data is transmitted through a physical channel, but the third data and the fourth data are both physical channels. It may be transmitted via.

In addition, the third data may be transmitted at a predetermined cycle or may be triggered as a specific event occurs.

In the above embodiments, the method may further include setting a transmission period consisting of a number of sub-frames corresponding to the maximum number of antennas that can be supported. In this case, data transmission to the receiving side is performed. Is performed by assigning each antenna actually used to a specific subframe within a corresponding transmission period.

In addition, the transmission band-specific data in the present invention may be channel quality information (CQI) for the transmission band, in which case the transmission band indicates the CQI band.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings in the specification of the present invention. First, the prerequisites that are commonly applied to all embodiments will be described, and then the specific contents of each embodiment will be described.

The present invention relates to a data transmission method in a mobile communication system, and has been proposed to perform efficient data transmission between elements constituting a mobile communication system, for example, between a mobile station and a base station, or between a mobile station and a mobile station. The examples assume, but are not necessarily limited to, transmitting channel quality information (hereinafter, 'CQI') through an uplink channel with a mobile station as a transmitting side and a base station as a receiving side.

The mobile communication system performs link adaptation between the mobile station and the base station while maximizing channel capacity for efficient data transmission. Link fit is performed based on downlink CQI fed back from the mobile station. In a multi-carrier system, since the CQI values are different for each unit frequency band, it is necessary to feed back separate CQIs for each unit frequency band. Herein, the unit frequency band indicates a CQI band.

For example, assuming that the basic unit of the CQI band is 375 KHz in a 5 MHz multi-carrier system, approximately 12 CQI bands exist. Here, assuming that 5-bit information is feedback for each CQI band, an uplink control channel (for example, CQICH) capable of transmitting a total of 60 bits (= 5 bits * 12) is required. Moreover, if a multi-antenna system is applied here, the amount of feedback information of the uplink channel is further increased. That is, in a multi-antenna system having four antennas, the amount of information fed back to the base station is 240 bits (= 60 bits * 4).

Accordingly, in the present invention, differential modulation (Differential Modulation, hereinafter referred to as 'DM') and Discrete Cosine Transform (hereinafter, referred to as 'DCT') are performed on the feedback target data in order to minimize the amount of information feedback for each antenna. However, according to the communication situation of the system, the DM and / or DCT is applied in an appropriate manner.

Hereinafter, various embodiments classified according to whether DM and / or DCT are applied and applied in a multi-antenna and a multi-carrier system using four antennas will be described. However, the present invention is not necessarily limited to the above embodiments, and whether the DM or DCT is applied or not and the application method thereof may be variously modified within a range that can be easily invented by those skilled in the art. .

<First Embodiment>

In this embodiment, DM channel information about CQI bands of antennas 2 to 4 (ant # 2 to ant # 4) corresponding to channel quality information for each CQI band of antenna 1 (ant # 1, reference antenna) is DM. And selectively performing DCT on channel quality information for each CQI band of antenna # 1 to minimize the amount of information to be transmitted to the receiver.

2 shows a data distribution for each antenna according to the first embodiment of a transform transmission method of data according to the present invention.

Here, when SINR ⁽ⁱ⁾ _(j) is the channel quality value for the j-th CQI band of antenna i-, DM (Δ ⁽²⁾ _(j) ) for the j-th CQI band of antenna ² silver

Δ ⁽²⁾ _(j) = SINR ⁽²⁾ _(j) - SINR ⁽¹⁾ _(j)

Is performed. In this case, the DM for the antennas 2 to 3 may be performed by the differential of the antenna 1, respectively, or may be performed by the differential of the previous antenna. In particular, in the latter case, the SINR value demodulated by the SIC (Successive Interference Cancelation) multi-antenna demodulator becomes SINR ⁽¹⁾ _(j). <SINR ⁽²⁾ _(j) <SINR ⁽³⁾ _(j) <SINR ^{(4) It} is useful when it is predetermined in the order of _(j) .

Meanwhile, channel quality information (SINR ⁽¹⁾ ₍₁₎ to SINR ⁽¹⁾ ₍₁₂₎ ) for each CQI band of antenna ₁ is performed to the base station through quantization and a predetermined compression process after one-dimensional DCT is performed. Is sent.

Second Embodiment

In this embodiment, after performing the antenna region DM procedure of the first embodiment, a two-dimensional discrete cosine transform (2D-DCT) of a predetermined unit for the entire SINR value for each CQI band for all antennas To minimize the amount of information. FIG. 3 illustrates the distribution of antenna-specific data for the case where 2D-DCT of 4 × 4 unit is particularly applied in the present embodiment. Here, the 2D-DCT is not necessarily limited to 4 x 4 units, and various units may be applied according to a communication situation, the number of antennas, the number of CQI bands, and the like.

This embodiment is particularly useful when the frequency domain correlation between each antenna is large and can maximize the compression rate of the transmission data.

Third Embodiment

In this embodiment, the channel quality is measured and the antenna area DM of the first embodiment is performed a predetermined number of times (for example, a sub-frame of 0.5 ms unit) for a predetermined number of times, and each result is collected and M x N for each antenna. After constructing the matrix, 2D-DCT is performed on the constructed matrix and transmitted to the receiver. Here, the size of the matrix may be set in various ways according to the number of antennas, the number of CQI bands, the number of unit executions, and the like. In addition, the number of buffers corresponding to the number of executions is provided in the terminal of the transmitting side, and each buffer temporarily stores the number of execution results.

In the case where the matrix is implemented in 4 × 4 size, the matrix configuration of the antenna 1 is as follows.

Here, when the configuration of the matrix is analyzed with reference to the data distribution chart for each antenna of FIG. 4, A1 to A4 indicate channel quality information of the first to fourth CQI bands for antenna 1, and B1 to B4 for the same antenna. It indicates that the channel quality information of the fifth to eighth CQI band, C1 ~ C4 indicates the channel quality information of the ninth to 12th CQI band for the same antenna. The matrixes A, B, and C are configured in the same manner for antennas 2 to 4, except that the components of the matrix for antenna 1 are 2D-DCT-treated SINR values, whereas the matrix for antennas 2 to 4 is used. The only difference is that the component of is a DM-treated SINR value.

This embodiment can be usefully applied especially when the variation of the channel quality information is small due to the large correlation time between the antennas.

Fourth Example

In addition to transmitting DM and / or DCT processed channel quality information (first data) (see FIG. 5A) as in the first embodiment, this embodiment serves as a reference for error rate measurement or error correction of the first data. It is characterized in that it further transmits reference information (second data) (see FIG. 5B or FIG. 5C). In this case, the second data may be transmitted according to a predetermined transmission period, or may be transmitted in a manner of triggering as a specific event occurs at the transmitting side or the receiving side. In the former case, the transmission period of the second data is preferably set larger than that of the first data.

In addition, since the second data is used as reference information, it is preferable that DM processing with a large amount of information but high error occurrence rate in the transmission process is not applied to the second data (see FIG. 5B). However, 2D-DCT processing of a predetermined unit capable of compressing data while having an error rate lower than that of DM may be selectively applied to the second data (see FIG. 5C).

Meanwhile, the first data having a relatively small amount of transmission information is transmitted through a physical channel, and the second data having a relatively large amount of transmission information is divided into medium access control (MAC) mediums rather than repeatedly transmitted through the physical channel. Control) It is desirable to transmit at once through signaling.

In the first to fourth embodiments described above, the antenna having the minimum size of channel quality information may be selected as the antenna 1, or any of a plurality of antennas may be selected. In addition, antenna 1 may be periodically changed according to a predetermined order set in each of the plurality of antennas. (Ant # 1-> ant # 2-> ant # 3-> ant # 4-> ant # 1 ... )

Fifth Embodiment

In the present embodiment, DCT is performed on channel quality information of all antennas ant # 1 to ant # 4, but a separate DM procedure is not performed. In this case, the DCT is one-dimensional discrete cosine transform (1D-DCT; 1 Dimensional-Discrete) for the channel quality information (SINR ⁽ⁱ⁾ ₍₁₎ to SINR ⁽ⁱ⁾ ₍₁₂₎ ) corresponding to the entire CQI band of each antenna Cosine Transform). For reference, FIG. 6 illustrates data distribution for each antenna when 1D-DCT is performed according to the present embodiment.

Sixth Example

This embodiment is similar to the fifth embodiment except that the DCT is performed by one-dimensional discrete cosine transform of a predetermined unit for channel quality information for all antennas. For reference, FIG. 7 illustrates data distribution for each antenna when 2D-DCT of 4 × 4 units is performed according to the present embodiment.

The fifth and sixth embodiments are particularly useful when there is no or small correlation between antennas, or when the receiver demodulator does not use the SIC (Successive Interference Cancellation) method, thereby reducing the efficiency of DM performance. .

Seventh Example

In this embodiment, the channel quality is measured in a predetermined time unit (for example, a sub-frame of 0.5 ms unit) a predetermined number of times, and the results of each operation are collected to form an M x N matrix for each antenna. Perform 2D-DCT for the This embodiment is the same as the third embodiment, except that the DM procedure is not performed compared to the third embodiment, and 2D-DCT is performed for each of antennas 2 to 4 as well as antenna # 1. Duplicate explanations will be omitted. For reference, a matrix structure of 4 × 4 size configured in four antenna systems can be confirmed through FIG. 8.

This embodiment may also be particularly useful in the case where the variation in channel quality information is small because the correlation time is large on the time axis between antennas.

Eighth Embodiment

In this embodiment, the channel quality information (third data) for all antennas is first transmitted to the receiving side, and then the fourth data in which the third data is adjusted is transmitted to the receiving side.

Here, the third data is reference information (see FIG. 9A or FIG. 9B) as a reference for measuring the error rate or correcting the error of the fourth data, and plays the same role as the second data of the fourth embodiment. Therefore, the third data may be transmitted according to a predetermined transmission period, or may be transmitted in a manner that is triggered as a specific event occurs at the transmitting side or the receiving side. In the former case, the transmission period of the second data is preferably set larger than that of the first data.

In addition, since the third data is used as reference information, it is preferable that DM processing with a large amount of information but high error occurrence rate in the transmission process is not applied to the third data (see FIG. 9A). However, 2D-DCT processing of a predetermined unit capable of compressing data while having an error rate lower than that of DM may be selectively applied to the third data (see FIG. 9B).

On the other hand, the fourth data is a DM performed on the current channel quality information for each CQI band corresponding to the channel quality information for each CQI band constituting the third data. As a result, the amount of information of the third data is minimized. See FIG. 9C)

In the present embodiment, the third data having a relatively large amount of transmission information is transmitted at one time through Medium Access Control (MAC) signaling, and the fourth data having a relatively small amount of transmission information is transmitted through a physical channel. desirable.

This embodiment has the advantage that the transmission amount of the fourth data corresponding to the actual channel quality information can be significantly reduced compared to the third data, which is the reference information, but because the cumulative error is increased due to the repeated execution of the DM, An appropriate trade-off is required between the data transmission period policy or triggering policy and the fourth data transmission policy for efficient utilization of communication resources.

<Example 9>

This embodiment differs from the eighth embodiment only in the types of transmission channels for the third data and the fourth data. That is, in this embodiment, both the third data and the fourth data are transmitted through a physical channel.

Meanwhile, the first to ninth embodiments described above are based on the premise of transmitting the channel quality information performed by DM and / or DCT at one time through a subframe at a corresponding time, but is not necessarily limited thereto. That is, when a predetermined transmission cycle is set in sub-frames of a predetermined time unit corresponding to the maximum number of antennas that can be supported, each antenna actually used in the mobile station is identified in the transmission period. Transmission target information can be distributed by performing data transmission by allocating to subframes.

An embodiment of such a distributed transmission method of data will be described with reference to FIGS. 10A to 10D. Here, assuming that the maximum number of antennas that can be supported is 4 and subframes of 50 ms are used, the transmission period is 200 ms (= 4 * 50 ms).

FIG. 10A illustrates a case where only one antenna is actually used in four antenna systems. In this case, as shown in FIG. 1, the antenna 1 is allocated and operated in subframe 1 within each transmission period, but may be allocated to any subframe within the same transmission period.

10B and 10C illustrate a case where two antennas are actually used in a four antenna system. Here, antennas 1 and 2 may also be allocated to any subframe within the same transmission period, as shown in subframes 1 and 2 in FIG. 10B and subframes 1 and 3 in FIG. 10C, respectively. You can see that it is assigned to.

FIG. 10D illustrates a case in which all four antennas are actually used in a four antenna system. Each antenna is set in a predetermined order so that the antennas are sequentially operated according to the corresponding order.

11 is a block diagram illustrating an internal configuration of a mobile communication terminal to which the data conversion transmission method of the present invention can be applied.

The mobile communication terminal includes an input unit 1101 for selecting a desired function or receiving information, a display unit 1103 for displaying various information for operating the mobile communication terminal, and various programs and receptions necessary for the mobile communication terminal to operate. A memory unit 1105 for storing data to be transmitted to the side, a wireless communication unit 1107 for receiving an external signal and transmitting data to the receiving side, and converting and amplifying a digital voice signal into an analog voice signal and a speaker SP And a voice processing unit 1111 for amplifying a voice signal from the microphone MIC and converting the voice signal into a digital signal, and a control unit 1113 for controlling the overall driving of the mobile communication terminal. Antennas (ANT # 1 ~ 4) are used.

An embodiment of a mobile communication terminal of the present invention is a differential conversion unit for performing differential modulation (DM) on data of transmission bands of the remaining antennas corresponding to data of transmission bands of a reference antenna among the plurality of antennas. 1109, in which case the wireless communication unit 1107 transmits data (first data) for each transmission band of the reference antenna and the remaining antennas to the receiving side.

Another embodiment of the mobile communication terminal of the present invention further includes a discrete cosine transform unit (not shown) for performing Discrete Cosine Transform (DCT) on the data to be transmitted, in which case the wireless communication unit 1107 transmits the converted data to a receiving side.

Another embodiment of the mobile communication terminal of the present invention further includes a data processor (not shown in the drawing) for generating second data by adjusting the size of first data consisting of data for each transmission band for each antenna. In this case, the wireless communication unit 1107 transmits the first data and the second data to the receiving side.

On the other hand, the mobile communication terminal in the present invention, PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) phone, CDMA-2000 A phone, a mobile broadband system (MBS) phone, or the like can be used.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

According to the present invention, since the amount of data to be transmitted to the receiving side can be minimized through DCT and DM, the physical channel of limited resources can be efficiently used, and a large amount of reference data for improving the accuracy of information is a relatively large bandwidth MAC. By transmitting the data through signaling and minimizing the data through the physical channel, the transmission channel can be efficiently utilized, thereby improving downlink scheduling gain at the base station.

Claims (29)

In the method for transmitting data using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, Performing differential modulation (DM) on data of transmission bands of the remaining antennas corresponding to data of transmission bands of a reference antenna among the plurality of antennas; And And transmitting first data corresponding to the data of the reference antenna and the differentially transformed data of the remaining antennas to a receiving side. The method of claim 1, And performing a 1D Discrete Cosine Transform (1D-DCT) on the data of the reference antenna. The method of claim 1, And performing a 2D Discrete Cosine Transform (2D-DCT) on the first data in a predetermined unit. 2. The method of claim 1, The differential conversion step is performed a predetermined number of times in predetermined time units, Collecting the results of each of the above to form a (antenna number x N) matrix (where 1≤N≤ number of transmission bands per antenna) for each antenna and two-dimensional discrete cosine transform (2D-DCT; 2 Dimensional) And performing a Discrete Cosine Transform. In this case, a transform transmission method of data in which the discrete cosine transformed matrix is transmitted to a receiver. The method of claim 1, And transmitting second data corresponding to the data of the reference antenna and the data of the remaining undifferentially converted antenna to the receiving side. The method of claim 5, The first data is transmitted through a physical channel, And the second data is transmitted through medium access control (MAC) signaling. The method according to any one of claims 2 to 5, The method may further include setting a transmission period consisting of a number of subframes corresponding to the maximum number of antennas that can be supported. And transmitting the data to the receiving side by assigning each antenna actually used to a specific subframe within a corresponding transmission period. The method according to any one of claims 2 to 5, The transmission band-specific data is channel quality information (CQI) for the corresponding transmission band, And the transmission band is a CQI band. The method of claim 8, And the antenna having the smallest size of the channel quality information is selected as a reference antenna. The method of claim 8, The transform transmission method of the data in which any one of the plurality of antennas is selected as a reference antenna. The method of claim 8, A predetermined order is set to each of the plurality of antennas, and the reference antenna is periodically changed according to the predetermined order. In the method for transmitting data using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, Performing Discrete Cosine Transform (DCT) on the data to be transmitted; And And transmitting the converted data to a receiving side. The method of claim 12, The discrete cosine transform is a one-dimensional discrete cosine transform (1D-DCT) for the data corresponding to the entire transmission band of each antenna transform transformation data transmission method. The method of claim 12, The discrete cosine transform is a transform transmission method of data that is performed by 2D discrete cosine transform (2D-DCT) of a predetermined unit for data corresponding to the entire transmission band of all antennas. The method of claim 14, The transmission target data is generated a predetermined number of times in predetermined time units, Collecting the results of each of the above to form a (antenna number x N) matrix (where 1≤N≤ number of transmission bands per antenna) for each antenna and two-dimensional discrete cosine transform (2D-DCT; 2 Dimensional) And performing a Discrete Cosine Transform. In this case, a transform transmission method of data in which the discrete cosine transformed matrix is transmitted to a receiver. The method according to any one of claims 13 to 15, The method may further include setting a transmission period consisting of a number of subframes corresponding to the maximum number of antennas that can be supported. And transmitting the data to the receiving side by assigning each antenna actually used to a specific subframe within a corresponding transmission period. The method according to any one of claims 13 to 15, The transmission band-specific data is channel quality information (CQI) for the corresponding transmission band, And the transmission band is a CQI band. In the method for transmitting data using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, Transmitting first data consisting of data for each transmission band for all antennas to a receiving side; And Adjusting the size of the first data to generate second data, and transmitting the generated second data to a receiving side. 19. The method of claim 18, wherein the second data is The transform transmission method of the data generated by performing differential transformation (DM) on the data of the current transmission band corresponding to the data of each transmission band of the first data. 20. The method of claim 19, wherein prior to the first data transfer step And performing a 2D Discrete Cosine Transform (2D-DCT) on the first data in a predetermined unit. 2. The method of claim 19 or 20, The first data is transmitted through Medium Access Control (MAC) signaling. And the second data is transmitted through a physical channel. The method of claim 19 or 20, And transmitting the first data and the second data through a physical channel. The method of claim 19 or 20, And transmitting the first data is performed according to a predetermined period. The method of claim 19 or 20, The method of claim 1, wherein the transmission of the first data is triggered as a specific event occurs. The method of claim 19 or 20, The method may further include setting a transmission period consisting of a number of subframes corresponding to the maximum number of antennas that can be supported. The method of claim 1, wherein the first data and the second data are transmitted by assigning each antenna actually used to a specific subframe within a corresponding transmission period. The method of claim 19 or 20, The transmission band-specific data is channel quality information (CQI) for the corresponding transmission band, And the transmission band is a CQI band. In a terminal for transmitting data using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, A differential conversion unit performing differential transformation (DM) on data of transmission bands of the remaining antennas corresponding to data of transmission bands of a specific antenna (reference antenna) among the plurality of antennas; And And a wireless communication unit for transmitting the transmission band-specific data (first data) of the reference antenna and the remaining antennas to a receiving side. In a terminal for transmitting data using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, A discrete cosine transform unit for performing Discrete Cosine Transform (DCT) on the data to be transmitted; And A mobile communication terminal comprising a wireless communication unit for transmitting the converted data to the receiving side. A terminal for transmitting data using a plurality of antennas and a plurality of subcarriers transmitted for each antenna, A data processor configured to generate second data by adjusting a size of first data including data for each transmission band for each antenna; And A mobile communication terminal comprising a wireless communication unit for transmitting the first data and the second data to the receiving side.

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