KR20160052070A - A method and apparatus for transtmitting and receiving signals in multicarrier system using non-orthogonal transmission signal - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multicarrier system using non-orthogonal transmission signals, and more particularly to a method and apparatus for transmitting and receiving signals using a high-order quadrature amplitude modulation in a multicarrier system using non-orthogonal transmission signals . The transmitter determines a transmission filter for transmitting data among the at least one transmission filter and applies the determined transmission filter to the data symbol to generate a data signal and transmits the data signal to the receiver. The receiver receives the data signal transmitted from the transmitter, determines a reception filter to be used for receiving the data signal among the at least one reception filter, and applies the determined reception filter to the received data signal to generate a data symbol.

Description

Field of the Invention [0001] The present invention relates to a method and apparatus for transmitting / receiving signals in a multi-carrier system using a non-orthogonal transmission signal,

The present invention relates to a multi-carrier system using non-orthogonal transmission signals, and more particularly to a method and apparatus for transmitting and receiving signals using a high-order quadrature amplitude modulation in a multi-carrier system using non-orthogonal transmission signals.

A fourth generation mobile communication system such as 3GPP Long Term Evolution (LTE) and WiMax (Worldwide Interoperability for Microwave Access) currently used is a physical layer transmission based on Orthogonal Frequency-Division Multiplexing (OFDM) OFDM utilizes the orthogonality of carriers to increase the efficiency of frequency resources and satisfy the needs of users who desire fast data transmission speed. However, current OFDM has a disadvantage that a guard band is required because it generates a large amount of leakage power between frequency bands. In order to overcome these disadvantages, a filter bank multi carrier (FBMC) transmission technique is being studied as a physical layer transmission technique for fifth generation mobile communication. The FBMC uses frequency filters to reduce leakage power to achieve high frequency efficiency, but it has disadvantages such as complicated implementation.

Since the offset quadrature amplitude modulation-FBMC (hereinafter referred to as OQAM-FMBC) transmission technique, which is one of the various methods of the FBMC transmission technique, uses OQAM symbols having orthogonality, the signal- to-interference ratio (SIR) performance. However, the complexity of the transceiver is high and the compatibility with existing systems is low due to the use of OQAM symbols and it is difficult to apply it to multiple-input and multiple-output (MIMO) systems. In order to overcome this disadvantage, QAM-FBMC (Quadrature Amplitude Modulation-FBMC, QAM-FMBC) transmission technology can be used. QAM-FBMC has relatively low transceiver complexity and uses QAM symbols. And is easy to expand under the MIMO system.

However, the QAM-FBMC transmission technique has a disadvantage that the SIR performance is low in a situation where a high signal-to-noise ratio (SNR) is observed. Therefore, there is a need for a method for improving the SIR performance in a situation where the SNR is high, that is, when a high-order modulation is used.

According to an aspect of the present invention, there is provided a method of transmitting a signal in a filter bank multicarrier system using a non-orthogonal transmission signal, the method comprising: Determining a filter, generating a data signal by applying the determined transmission filter to a data symbol, and transmitting the data signal to a receiver.

A method of receiving a signal in a filter bank multicarrier system using a non-orthogonal transmission signal, the method comprising: receiving a data signal transmitted by a transmitter; The method comprising the steps of: determining a reception filter to be used for receiving the data signal; generating a data symbol by applying the determined reception filter to the received data signal; and decoding the data symbol. do.

Further, there is provided a transmitter for transmitting a signal in a filter bank multicarrier system using a non-orthogonal transmission signal, comprising: a transmission / reception unit for transmitting / receiving a signal; A control unit for determining a transmission filter for transmitting data among at least one transmission filter, generating a data signal by applying the determined transmission filter to a data symbol, and controlling the data signal to be transmitted to a receiver; And a transmission filter for generating a data signal using the determined transmission filter.

Further, there is provided a receiver for receiving a signal in a filter bank multicarrier system using a non-orthogonal transmission signal, the receiver comprising: a transmission / reception unit for transmitting / receiving a signal; Determining a receive filter to be used for receiving the data signal among at least one receive filter, applying the determined receive filter to the received data signal to generate a data symbol, A control unit for controlling the decoding unit to decode the symbol; And a reception filter for receiving the data signal using the determined reception filter.

According to the embodiment of the present invention, when a high-order modulation is used, a method for improving the SIR performance can achieve a high SIR and SINR performance even when a high-order modulation is used, so that the signal can be successfully transmitted and received.

1 is a diagram illustrating SINR performance of an OFDM and QAM-FBMC transmission technique.
2 is a diagram briefly showing a structure of a transceiver of the QAM-FBMC transmission scheme.
FIG. 3 is a diagram illustrating the SINR performance of the QAM-FBMC transmission technique using the newly designed reception filter compared with the SINR performance of the OFDM and QAM-FBMC transmission technique using the conventional reception filter.
Figure 4 is a flow diagram of transmitting a receive filter indicator at a transmitter.
5 is a flowchart illustrating a method of transmitting an indicator when a transmitter transmits a 1-bit indicator, deciding a reception filter, and decoding data.
FIG. 6 is a flowchart illustrating a method of transmitting an N-bit indicator in a transmitter, deciding a transmission / reception filter, and decoding data after transmitting an indicator.
FIG. 7 is a flowchart for deciding a transmission / reception filter based on a channel state and decoding the data.
8 is a block diagram of an apparatus that can perform the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

The embodiments of the present invention will be described in detail with reference to a wireless communication system based on an FBMC transmission scheme. However, the main point of the present invention is to provide a communication system having a similar technical background and channel form, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

1 is a diagram illustrating SINR performance of an OFDM and QAM-FBMC transmission technique. The horizontal axis represents the SNR (100, in dB) and the vertical axis represents the signal-to-interference and noise ratio (SINR) (110, in dB). The solid line 120 indicates the SINR performance when OFDM is used according to the SNR and the dashed line 130 indicates the SINR performance when the QAM-FBMC transmission technique is used.

1, OFDM and QAM-FBMC transmission schemes exhibit similar SINR performance in a low SNR region 140 where QPSK scheme can be used. That is, when the low-order modulation scheme is used, there is no difference in the SINR performance between the OFDM scheme and the QAM-FBMC scheme. However, when the SNR performance is increased, the SINR performance increases in proportion to the SNR performance when OFDM is used. However, when the QAM-FBMC transmission scheme is used, the SINR performance converges even if the SNR increases. It can be seen that the SINR performance is much higher than that in the case of using the QAM-FBMC in the high SNR region 150 where the 64QAM scheme can be used.

Specifically, in the case of the FDAM transmission method, when a frequency-domain FD localization is considered when the overlapping factor is 4, if a modulation scheme of a low order such as QPSK is applied in the vicinity of 15-20 dB, It works. However, as the SNR increases, the SIR performance becomes stagnant when a high-order modulation scheme such as 64QAM is applied.

SNR (dB) SIR (dB) SINR (dB) 25
20 18.8067 60 24.9986

Table 1 shows the SNR performance according to the SIR performance when the SNR performance is the same when using the QAM-FBMC transmission scheme. The SINR is 18.8067dB when the SIR is 20dB and the SINR is 24.9986dB when the SIR is 60dB. As a result, the SINR value is not significantly changed compared to the SIR value.

Since the QAM-FBMC uses symbols with no orthogonality, inter-symbol interference (ISI) occurs at the receiver and the amount of this occurs is very small. Therefore, when using a low-order modulation scheme, When a high-order modulation scheme is used, the problem arises because the inter-symbol interference amount becomes larger relative to the noise.

Therefore, there is a need for a method to compensate for the disadvantage of the QAM-FBMC transmission method called bottleneck of the SINR value which is problematic while maintaining the advantage of using the QAM symbol and low complexity of the transceiver.

Since the OFDM or OQAM-FBMC transmission scheme utilizes the orthogonality of the carrier, it ensures a high SIR, and therefore, a matched filter that maximizes the SNR is a method of optimizing the SINR. However, since the QAM-FBMC transmission method has a limitation in increasing the SIR, it is possible to improve the SINR performance by using other receiving filters considering SIR rather than using a matched filter maximizing the SNR.

If another way to improve SIR performance and support higher order modulation is to abandon one or more of the benefits of QAM-FBMC. For example, use OFDM or use thicker main lobes to discourage localization of the frequency dimension, use OQAM symbols instead of QAM symbols, increase the overlapping exponent L, or use a complex equalizer The complexity of the computation should be increased during transmission and reception.

2 is a diagram briefly showing a structure of a transceiver of the QAM-FBMC transmission scheme.

2A schematically shows a transmitter structure.

The nth QAM data symbol

(200) passes through channel H (220) via transmission filter P _T (210)

Lt; RTI ID = 0.0 > 230 < / RTI > In this case, the transmission signal of the QAM-FBMC transmission scheme can be regarded as a signal passing through two channels serially, the filter P _T is a predetermined channel, and the channel H can be regarded as a random channel. At this time,

silver

.

Figure 2b is a simplified illustration of a receiver structure.

The nth received signal

(250) passes through a channel equalizer G (260) and a receive filter P _R (270). The receiver can be seen to perform equalization for two channels in a serial manner where the channel equalizer G is a process for a random channel and the receive filter P _R is a predetermined transmission This is a process for the filter. That is, the equalizer G _all for the transmission channel P _T H

, Where G is the equalizer for H and P _R is the equalizer for P _T. This method is characterized in that the conventional overall equalizer is divided into a random channel and a predetermined filter part and processed independently to lower the complexity.

Here are two filters that can maximize SINR.

First, from the QAM-FBMC reception vector model of the ideal channel,

And data symbols

Can be expressed as Equation 1 below.

[Equation 1]

P _T is the transmit filter, and I _T is the inter-symbol interference. In this case, the optimization problem such as Equation 2 can be considered.

&Quot; (2) "

For given P _T, P _R to minimize MSE = minimize

The solution to solve this is shown in Equation 3 below, which becomes a receive filter that maximizes SIR.

&Quot; (3) "

Receive filter = P _R =

Second, from the QAM-FBMC reception vector model of the additive white Gaussian noise channel,

And data symbols

Can be expressed as follows.

&Quot; (4) "

P _T is the transmit filter, I _T is the symbol interference,

Denotes an n-th noise signal. In this case, the optimization problem as shown in Equation 5 can be considered.

&Quot; (5) "

For given P _T and

_, P _R to minimize MSE = minimize

The solution to solve this is shown in Equation 6 below, which becomes a receive filter that maximizes the SINR for a given SNR.

&Quot; (6) "

Receive filter = P _R =

SNR is the power of the noise related to the SNR when normalizing the signal size to 1

. ≪ / RTI >

FIG. 3 is a diagram illustrating the SINR performance of the QAM-FBMC transmission technique using the newly designed reception filter compared with the SINR performance of the OFDM and QAM-FBMC transmission technique using the conventional reception filter. The horizontal axis represents SNR (300, dB) and the vertical axis represents SINR (310, dB). The solid line 320 indicates the SINR performance when OFDM is used according to the SNR, the broken line 330 indicates the SINR performance when the QAM-FBMC transmission technique using the existing matched filter is used, and the dashed line 340 indicates the SIR maximization filter The SINR performance is shown.

3, a QAM-FBMC transmission scheme using OFDM and a matched filter and a QAM-FBMC transmission scheme using a SIR maximization filter exhibit similar SINR performance in a low SNR region 350 where QPSK scheme can be used. That is, when a low-order modulation scheme is used, the QAM-FBMC transmission scheme using existing matched filters or the QAM-FBMC transmission scheme using a newly designed filter are used, and there is no difference in SINR performance. However, when QAM-FBMC transmission method using matched filter is used for high SNR performance, SINR performance converges even if SNR increases, but in case of QAM-FBMC transmission method using SIR maximization filter, SINR performance is improved when SNR is high Can be seen. The QAM-FBMC transmission scheme using the SIR maximization filter in the high SNR region (360) using the 64QAM scheme has a much higher SINR performance than the QAM-FBMC using the matched filter .

The combination of the transmit filter and the receive filter is determined by using the two designed filters and applied to the QAM-FBMC transmission method. In order to obtain the optimum SINR value, the combination of the transmitting and receiving filters is more important than the type of the filter to be used. A method of determining the combination of the transmission and reception filters is a method of determining according to a channel state implicitly based on a channel state information fed back from a receiver and a method of determining explicitly based on an indicator transmitted from a transmitter . The channel state can be determined by a Modulation and Coding Scheme (MCS) level or an SNR value, and can be determined by an indicator or index indicating various channel states. The transmit filter as well as the receive filter can be changed. Below we propose various methods for determining the combination of transmit and receive filters.

Table 2 shows an example in which the transmission filter is determined and the reception filter is changed according to the MCS level.

MCS index Modulation order Coding rate Transmit Filter Receive Filter 0 QPSK 1/2 P _T P _{R, 0} One 16QAM 1/2 P _T P _{R, 1}

In Table 2, the transmission filter uses a general-purpose transmission filter P _T , and the reception filter uses two matched filters P _{R, 0} and SIR maximization filter P _{R, 1} as two examples. If the SNR for low order modulation is low (MCS index 0) and the SNR for high order modulation is high (MCS index 1), use the SIR maximization filter to optimize the SINR value . This is an example of the use of a simplified filter.

In general, both transmit and receive filters may vary depending on the MCS level and channel state. Table 3 shows an example in which the transmission / reception filter is changed according to the SNR value.

SNR range (dB) Transmit Filter Receive Filter 0-4 P _{T, 0} P _{R, 0,0} 4-8 P _{T, 1} P _{R, 1,0} 8-12 P _{T, 2} P _{R, 2.0} 12-16 P _{T, 2} P _{R, 2,1} 16-20 P _{T, 3} P _{R, 3,1} 20-24 P _{T, 4} P _{R, 4.2}

In Table 3, in the P _{R, i, j} of the receiving filter i is an index which is the index, j is the type of the reception filter of the transmit filter. When j is 0, it means a matched filter, 1 is a SINR maximization filter, and 2 is a SIR maximization filter.

Table 4 is an example of determining the combination of the transmission and reception filters according to the MCS level.

MCS index Modulation order Coding rate Transmit Filter Receive Filter 0 QPSK 5/6 P _{T, 0} P _{R, 0,0} One 16QAM 1/2 P _{T, 1} P _{R, 1,0} 2 64QAM 1/2 P _{T, 2} P _{R, 2,1} 3 64QAM 5/6 P _{T, 3} P _{R, 3,1}

In Table 4 at P _{R, i, j} of the receiving filter i is an index which is the index, j is the type of the reception filter of the transmit filter. When j is 0, it means a matched filter, 1 is a SINR maximization filter, and 2 is a SIR maximization filter.

Table 5 shows an example of determining the transmission / reception filter combination according to the MCS level.

MCS index Modulation order Coding rate Transmit Filter Receive Filter 0 QPSK 5/6 P _{T, 0} P _{R, 0,0} One QPSK 2/3 P _{T, 0} P _{R, 0,1} 2 QPSK 1/2 P _{T, 1} P _{R, 1,1} 3 16QAM 5/6 P _{T, 2} P _{R, 2.0} 4 16QAM 2/3 P _{T, 2} P _{R, 2,1} 5 16QAM 1/2 P _{T, 3} P _{R, 3.0} 6 64QAM 1/3 P _{T, 3} P _{R, 3,1} 7 64QAM 2/3 P _{T, 4} P _{R, 4,1}

In Table 5 in the P _{R, i, j} of the receiving filter i is an index which is the index, j is the type of the reception filter of the transmit filter. When j is 0, it means a matched filter, 1 is a SINR maximization filter, and 2 is a SIR maximization filter.

Table 6 shows an example of determining the reception filter by transmitting an indicator indicating the reception filter directly at the transmitter. In the transmitter, the transmission filter can be determined based on the channel state or according to a predetermined rule, and the receiver determines the reception filter according to the indicator transmitted from the transmitter. The transmitter can determine an indicator indicating a reception filter to be used in the receiver according to the type of the transmission filter and the channel state. If the transmitter transmits an N-bit indicator, the receiver can select 2 ^N receive filters.

2 bits indicator Receive Filter 00 P _{R, 0,0} 01 P _{R, 0,1} 10 P _{R, 1,0} 11 P _{R, 1,1}

Table 7 shows an example of transmitting a 1-bit indicator from a transmitter to a receiver. If the indicator is 1 bit, 0 indicates a matched filter and 1 indicates a SIR maximization filter. In this case, if one transmission filter is used and two reception filters are used, or if several transmission filters are used, the various transmission filters are determined according to the channel state, such as the MCS level, and the reception filter is determined based on the type and indicator of the transmission filter And determine various combinations of transmission and reception filters with a 1-bit indicator.

MCS index 1 bit indicator Modulation Coding Rate Transmit Filter Receive Filter 0 0 QPSK 1/2 P _{T, 0} P _{R, 0,0} One P _{R, 0,1} One 0 16QAM 1/2 P _{T, 1} P _{R, 1,0} One P _{R, 1,1}

If the SNR is changed as in the above embodiment, various combinations of transmission and reception filters must be determined appropriately in order to obtain an optimal SINR. Further, considering additional channel conditions, more filters can be used depending on the situation. However, the more complex the filter is, the higher the complexity of the transceiver. Also, as the type of the receive filter increases, many bits must be allocated to the indicator transmitted from the transmitter.

Below we discuss how to determine the combination of transmit and receive filters in the transceiver.

Figure 4 is a flow diagram of transmitting a receive filter indicator at a transmitter.

The transmission of the indicator indicating the reception filter is executed before the data transmission. The indicator can be sent over the control channel or can use signals from higher layers. When transmitting an indicator, the transceiver can use a predetermined common filter.

4, the transmitter determines (410) a transmit filter to use in transmitting data. At this time, the transmitter can determine which transmission filter to use based on the MCS level and the SNR value determined based on the channel state information and channel state information transmitted from the receiver, and can use a predetermined transmission filter. The transmitter determines (420) a receive filter to use in receiving data. At this time, the transmitter can determine the reception filter based on the transmission filter determined to be used at the time of data transmission and the MCS level and SNR value determined based on the channel state information and channel state information transmitted from the receiver, and can use the predetermined reception filter . The transmitter determines (430) an indicator according to the determined receive filter and transmits (440) an indicator from the transmitter to the receiver.

5 is a flowchart illustrating a method of transmitting an indicator when a transmitter transmits a 1-bit indicator, deciding a reception filter, and decoding data.

According to FIG. 5, the transmitter determines (505) whether the indicator has been transmitted. If the indicator is transmitted, the data is transmitted 510 to the transmission filter for data transmission. The receiver receives (515) the data using the receive filter determined based on the indicator. The receiver decodes the received data (555).

If the transmitter did not transmit the indicator, the transmitter starts the indicator transmission process (520). The transmitter compares the MCS level determined based on the channel state information transmitted from the receiver with a specific threshold value (525). The transmitter determines to use the SIR maximization filter if the MCS level is above a certain threshold, determines the indicator to be 1 (535), transmits the indicator to the receiver via a common filter, and if the MCS level is below a certain threshold, (530) and transmits the indicator to the receiver via a common filter. The receiver receives (540) the indicator using a common filter, decodes (545) the indicator, and receives (515) and decodes (555) the data using the receive filter determined according to the indicator. The receiver can determine the channel state based on the received indicator, calculate an appropriate MCS level for the channel state, and feedback (550) it to the transmitter.

FIG. 6 is a flowchart illustrating a method of transmitting an N-bit indicator in a transmitter, deciding a transmission / reception filter, and decoding data after transmitting an indicator.

According to FIG. 6, the transmitter determines (605) whether the indicator has been transmitted. If the indicator is transmitted, the transmitter transmits (610) the determined transmission filter data based on the channel state information, and the receiver receives (615) the data using the reception filter determined based on the indicator. The receiver decodes the received data (655).

If the transmitter did not transmit the indicator, the transmitter starts the indicator transmission process (620). The transmitter determines (625) a transmit filter to use based on the channel state information transmitted from the receiver. The transmitter determines (630) a receive filter to be used by the receiver based on the channel condition and the determined transmit filter. The transmitter transmits to the receiver through a common filter as an indicator indicating the determined reception filter. This directive can be one of 0 to M-1. The receiver receives (640) the indicator using the common filter and decodes (645) the indicator. The receiver receives (615) and decodes (655) the data using the receive filter determined according to the indicator. The receiver can determine the channel state based on the received indicator, and then feedback (550) it to the transmitter.

FIG. 7 is a flowchart for deciding a transmission / reception filter based on a channel state and decoding the data.

Referring to FIG. 7, the transmitter determines 710 a transmission filter to be used for data transmission according to a predetermined rule based on channel state information transmitted from a receiver or channel state information directly measured by a transmitter. The channel state information may be an MCS level or an SNR value, and a transmission filter may be determined by a method such as a magnitude comparison of a predetermined threshold value and channel state information. The receiver determines (720) a receive filter to use in receiving data according to a predetermined rule based on the channel state. The transmitter transmits the data to the determined transmit filter, and the receiver receives (730) the data using the determined receive filter. The receiver decodes (740) the received data.

8 is a block diagram of an apparatus that can perform the present invention.

The transmitter 800 includes a control unit 810, a transmission filter 820, and a transmission / reception unit 830. The transmission / reception unit transmits / receives a signal, the control unit determines a transmission filter for transmitting data among at least one transmission filter, applies a transmission filter determined to the data symbol to generate a data signal, and controls the data signal to be transmitted to a receiver. In addition, the control unit controls the transmission filter to be determined based on a result of comparing the channel state information received from the receiver with a specific threshold value, and determines a reception filter for receiving the data signal based on the channel state information , Generates an indicator indicating the determined reception filter, and controls to transmit the indicator to the receiver. The transmit filter generates the data signal using the determined transmit filter. The at least one transmission filter includes at least one of a matched filter, an SIR maximization filter, and a SINR maximization filter.

The receiver 840 includes a control unit 850, a transmission / reception unit 860, and a reception filter 870. The control unit receives the data signal transmitted from the transmitter, determines a reception filter to be used for receiving the data signal among the at least one reception filter, applies the determined reception filter to the received data signal, And controls to decode the data symbols. Also, the controller determines a reception filter based on a result of comparing the channel state information with a specific threshold value, determines a reception filter based on the indicator transmitted by the transmitter, generates channel state information based on the received data signal, , And to transmit the channel state information to the transmitter, and the channel state information is used for the transmitter to determine the transmit filter to use to generate the indicator or to transmit the data signal. A receive filter is used to receive the data signal. The at least one receive filter includes at least one of a matched filter, an SIR maximization filter, and a SINR maximization filter.

Claims (16)

A method of transmitting a signal in a filter bank multicarrier system using a non-orthogonal transmission signal,
Determining a transmission filter for transmitting data among at least one transmission filter;
Generating a data signal by applying the determined transmission filter to a data symbol;
And transmitting the data signal to a receiver. 2. The method according to claim 1,
Wherein the determination is based on a result of comparing channel state information received from the receiver with a specific threshold value. 2. The apparatus of claim 1, wherein the at least one transmit filter comprises:
A matched filter, a SIR maximizing filter, and a SINR maximizing filter. The method according to claim 1,
Determining a reception filter for the receiver to receive the data signal based on channel state information;
Generating an indicator indicating the determined reception filter;
And transmitting the indicator to the receiver. A method for a receiver to receive a signal in a filter bank multicarrier system using a non-orthogonal transmission signal,
Receiving a data signal transmitted from a transmitter,
Determining a receive filter to be used for receiving the data signal among at least one receive filter;
Generating a data symbol by applying the determined reception filter to the received data signal;
And decoding the data symbol. 6. The method according to claim 5,
Wherein the determining is based on a result of comparing channel state information with a specific threshold or based on an indicator transmitted by the transmitter. 6. The apparatus of claim 5, wherein the at least one receive filter comprises:
A matched filter, a SIR maximization filter, and a SINR maximization filter. 6. The method of claim 5,
Generating channel state information based on the received data signal;
And transmitting the channel state information to the transmitter,
Wherein the channel state information is used by the transmitter to generate an indicator or to determine a transmit filter to use to transmit the data signal. A transmitter for transmitting a signal in a filter bank multicarrier system using a non-orthogonal transmission signal,
A transmitting and receiving unit for transmitting and receiving signals;
A control unit for determining a transmission filter for transmitting data among at least one transmission filter, generating a data signal by applying the determined transmission filter to a data symbol, and controlling the data signal to be transmitted to a receiver; And
And a transmission filter for generating a data signal using the determined transmission filter. 10. The apparatus according to claim 9,
Wherein the controller controls to further determine based on a result of comparing the channel state information transmitted from the receiver and the received channel state information with a specific threshold value. 10. The apparatus of claim 9, wherein the at least one transmit filter comprises:
A matched filter, an SIR maximization filter, and a SINR maximization filter. 10. The apparatus according to claim 9,
Based on the channel state information, the receiver determines a reception filter for receiving the data signal, generates an indicator indicating the determined reception filter, and controls the transmitter to further transmit the indicator to the receiver . A receiver for receiving a signal in a filter bank multicarrier system using a non-orthogonal transmission signal,
A transmitting and receiving unit for transmitting and receiving signals;
Determining a receive filter to be used for receiving the data signal among at least one receive filter, applying the determined receive filter to the received data signal to generate a data symbol, A control unit for controlling the decoding unit to decode the symbol; And
And a receiving filter for receiving the data signal using the determined receiving filter. 14. The apparatus of claim 13,
Wherein the channel state information is determined based on a result of comparing the channel state information with a specific threshold value or further based on an indicator transmitted by the transmitter. 14. The apparatus of claim 13, wherein the at least one receive filter comprises:
A matched filter, a SIR maximization filter, and a SINR maximization filter. 14. The apparatus of claim 13,
Generates channel state information based on the received data signal, and further controls the transmitter to transmit the channel state information,
Wherein the channel state information is used by the transmitter to generate an indicator or to determine a transmit filter to use to transmit the data signal.

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