KR102467175B1 - Method and system for transmitting/receiving data using multiple space time line codes/decodes - Google Patents

Abstract

The present invention relates to a method and system for transmitting and receiving data using multi-space-time line coding and decoding, the method comprising: dividing a plurality of input symbols modulated by a transmitter into a plurality of data streams through serial-to-parallel conversion; performing, by the transmitter, multi-space-time encoding on each of a plurality of data streams; performing pre-coding on the plurality of coded data streams by the transmitter using channel state information; transmitting the plurality of data streams on which the precoding is performed through a plurality of transmit antennas; performing, by a receiver, multi-space-time line decoding by receiving the plurality of data streams through a plurality of receive antennas; and restoring, by the receiver, the space-time line-decoded signal into a single data symbol through parallel-to-serial conversion.

Description

Method and system for transmitting and receiving data using multi-space-time line encoding and decoding

Embodiments of the present invention relate to a method and system for transmitting and receiving data using multi-space-time line coding and decoding.

A transmission method using multiple antennas is widely used to increase transmission speed between a transmitter and a receiver in a situation where transmission power and bandwidth are limited. In most communication systems, a transmitting/receiving end transmits a known pilot signal to estimate a channel at the receiving end, and detects a transmitted symbol from the received signal using this. And, in some communication systems, the channel capacity of the multi-antenna system is increased by transferring the channel state information estimated by the receiver to the transmitter. In a multi-antenna system, when the transmitter does not know the channel state information and only the receiver knows the channel state information, a maximum diversity gain can be obtained using a space-time block code.

In the case of Internet of Things (IoT) devices that have recently been widely spread, it is very important to implement IoT terminals with low power, low complexity, and low cost in order to increase portability and guarantee a long operation time. In addition, since an IoT terminal used in a sensor network sporadically transmits a small amount of information, when a pilot is transmitted for channel estimation, the ratio of capacity loss due to the pilot to the total transmission capacity increases. In order to solve this problem, channel estimation is performed using pilots in uplink of the IoT, and an environment in which pilots for channel estimation are not transmitted is considered in downlink. At this time, it is assumed that uplink and downlink data are transmitted in the same band through time division multiplexing, and that the uplink and downlink channels are symmetrical. In this case, communication is performed in a state where the IoT downlink transmitter knows the channel state information and the downlink receiver does not know the channel state information.

If the transmitter knows the channel state information and the receiver does not, the transmitter may use a precoding technique in which the channel matrix is multiplied by an inverse matrix and transmitted. However, when the correlation coefficient between channel matrix vectors is large, noise is amplified during the inverse matrix process. As an alternative to this, a space-time line code transmission technique has been developed in which maximum diversity can be obtained without channel information in a receiver using channel state information of a transmitter. In this method, the transmitter generates a space-time line coded signal using a space-time block coding matrix and a multi-antenna channel matrix, and the receiver uses a fixed combiner regardless of channel information, and through this, only the receiver uses channel state information. It obtains the same signal-to-noise ratio as the block code.

Space-time block codes are defined in various forms according to the number of transmit antennas, and as the number of transmit antennas increases, the coding rate decreases, resulting in slow transmission rates or reduced orthogonality between space-time block codes, complicating the receiver structure and degrading link performance. Similarly, in the case of space-time line codes, various types of coding schemes can be defined according to the number of receive antennas, and the diversity order increases in proportion to the number of receive antennas.

The problems of the prior art applicable to a communication environment in which both the transmitter and receiver use multiple antennas, the transmitter knows channel state information, and the receiver does not know channel state information at all or only knows effective channel gain information are as follows: same.

-Time-space block code transmission

This transmission technique achieves a diversity gain when the transmitter does not know the channel information and the receiver knows the channel state information. If the receiver does not know the channel state information, space-time blocking code cannot be used.

- Inverse matrix-based precoding technique:

This transmission scheme supports spatial multiplexing transmission when the transmitter knows the channel state information and the receiver does not know the channel information. However, when the correlation coefficient between channel matrix vectors is large, noise introduced into the receiver is amplified during the channel inverse matrix calculation process, resulting in a deterioration of the signal-to-noise ratio.

- space-time line code:

This transmission technique achieves maximum diversity gain when the transmitter knows the channel state information and the receiver does not know the channel information. When orthogonality is maintained to reduce implementation complexity of the receiver, the maximum coding rate is obtained when the number of receiving antennas is 2, but when three or more receiving antennas are used, the coding rate is lowered and the transmission rate is lowered.

In an embodiment of the present invention, when channel state information is easy to obtain in a transmitter of a multi-antenna system, and channel state information is not known or only partial information is known in a receiver, space-time line coding and decoding are applied. Provides a data transmission/reception method for simultaneously transmitting data streams of

The problem to be solved by the present invention is not limited to the above-mentioned problem (s), and another problem (s) not mentioned will be clearly understood by those skilled in the art from the following description.

A data transmission/reception method using multi-space-time line coding and decoding according to an embodiment of the present invention includes the steps of a transmitter dividing a plurality of modulated input symbols into a plurality of data streams through serial-to-parallel conversion; performing multiple space-time encoding on each stream; performing pre-coding on the plurality of coded data streams by the transmitter using channel state information; transmitting the plurality of data streams on which the precoding is performed through a plurality of transmit antennas; performing, by a receiver, multi-space-time line decoding by receiving the plurality of data streams through a plurality of receive antennas; and restoring, by the receiver, the space-time line-decoded signal into a single data symbol through parallel-to-serial conversion.

In one embodiment, the step of performing the precoding may include setting, by the transmitter, an antenna mixture pattern for a plurality of reception antennas provided in a receiver, and using the set antenna mixture pattern according to a preset reception performance criterion. It is characterized in that pre-coding is performed.

In one embodiment, the performing of the precoding may include defining, by the transmitter, a set of mixed patterns applicable to both the transmitter and the receiver; calculating a precoder according to a predetermined reception performance criterion using an arbitrary mixed pattern included in a set of mixed patterns; calculating reception performance of a receiver for each mixed pattern included in a set of defined mixed patterns using the precoder; and selecting a mixed pattern maximizing the calculated reception performance from among the mixed patterns included in the set of mixed patterns.

In one embodiment, the step of calculating the precoder may include zero-forcing, minimum mean square error (MMSE), sum rate maximization, signal-to-interference-plus-noise (SINR) ratio) is characterized by using any one of maximization.

In one embodiment, the step of performing the multi-space-time line decoding may include mixing a plurality of data streams received by the receiver using the mixing pattern, dividing the mixed signal into a plurality of data streams, and then dividing each data stream into a plurality of data streams. It is characterized by performing multi-space-time line decoding for .

In one embodiment, the performing of the multi-space-time line decoding may include receiving, by the receiver, a mixed pattern from the transmitter.

In one embodiment, the performing of the multi-space-time line decoding may include defining, by the receiver, a set of mixed patterns applicable to both the transmitter and the receiver; performing space-time line decoding on each mixed pattern included in the set of mixed patterns; calculating a received signal quality index for each mixing pattern; and selecting a mixing pattern maximizing the received signal quality index.

A data transmission and reception system according to an embodiment of the present invention divides a plurality of modulated input symbols into a plurality of data streams through serial-to-parallel conversion, performs multiple space-time encoding on each of the plurality of data streams, and performs channel state a transmitter for transmitting a plurality of data streams pre-coded using information through a plurality of transmit antennas; and a receiver for receiving the plurality of data streams through a plurality of receiving antennas, performing multi-space-time line decoding, and restoring the plurality of data streams into a single data symbol through parallel-to-serial conversion.

A data transmission apparatus using multi-space-time line coding according to an embodiment of the present invention includes a serial-to-parallel divider for dividing a plurality of modulated input symbols into a plurality of data streams through serial-to-parallel conversion; a space-time encoder that performs multi-space-time encoding on each of a plurality of data streams; a pre-encoder that performs pre-coding using channel state information; and an antenna unit for transmitting a plurality of pre-coded data streams through a plurality of transmission antennas.

In one embodiment, the number of data streams transmitted simultaneously through the antenna unit is twice the number of the transmission antennas.

Details of other embodiments are included in the detailed description and accompanying drawings.

According to an embodiment of the present invention, it is possible to increase data transmission speed through spatial multiplexing and improve stability of a transmission link by simultaneously increasing a diversity gain.

In addition, according to an embodiment of the present invention, it is possible to implement an IoT terminal or a sensor terminal corresponding to a receiver with low complexity, low power, and low cost while increasing data transmission speed and transmission stability.

1 is a block diagram showing the structure of a data transmission/reception system using multi-space-time line coding and decoding according to an embodiment of the present invention.
2 is a diagram showing a detailed structure of a data transmission/reception system according to an embodiment of the present invention.
3 is a diagram showing a detailed structure of a data receiver according to an embodiment of the present invention.
4 is a diagram showing the structure of a space-time encoder according to an embodiment of the present invention.
5 is a diagram showing the structure of a pre-encoder according to an embodiment of the present invention.
6 is a diagram showing the structure of a decoder according to an embodiment of the present invention.
7 is a flowchart illustrating a data transmission/reception method using multi-space-time line coding and decoding according to an embodiment of the present invention.
8 is a flowchart illustrating a method of determining a reception antenna mixing pattern in the precoding process of FIG. 5 according to an embodiment of the present invention.
9 is a flowchart illustrating a method of determining a receive antenna mixing pattern according to an embodiment of the present invention.
10 to 12 are diagrams showing the structure of a data receiver according to another embodiment of the present invention.

Advantages and/or features of the present invention, and methods of achieving them, will become apparent with reference to the following detailed description of the embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various forms different from each other, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

In the present invention, a communication system is considered in which both the transceiver uses multiple antennas, the transmitter knows channel state information, and the receiver does not have channel state information or only knows effective channel gain information.

The multi-space-time line encoding and decoding method according to an embodiment of the present invention can be used for IoT routers and terminals, and can be applied to sensor network collection devices and sensor terminals.

Hereinafter, downlink (DL) means communication from a higher node to a lower node, and uplink (UL) means communication from a lower node to a higher node. In downlink, a transmitter may be a sharer or a part of a sensor network collection device, and a receiver may be a part of a terminal or a sensor terminal. In uplink, a transmitter may be a terminal or a part of a sensor terminal, and a receiver may be a part of a sharer or a sensor network collection device.

In the multi-space-time line coding and decoding scheme according to an embodiment of the present invention, the downlink transmitter uses channel state information, and the receiver does not use channel state information or uses only effective channel gain information. When the receiver uses Mary Phase Shift Keying (M-PSK) modulation scheme, channel state information is not used, and when other modulation schemes are used, only effective channel gain information is used. For reference, the effective channel gain can be obtained by a conventionally known blind estimation technique that does not use a pilot in a receiver.

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

1 is a block diagram showing the structure of a data transmission/reception system using multi-space-time line encoding and decoding according to an embodiment of the present invention, and FIG. 2 is a diagram showing a detailed structure of a data transmitter according to an embodiment of the present invention. , FIG. 3 is a diagram showing a detailed structure of a data receiver according to an embodiment of the present invention.

Referring to FIGS. 1 and 2 , the data transmission/reception system 10 includes an upper node 100 and a lower node 200 .

In one embodiment, the uplink of the data transmission/reception system 10 will be described. Therefore, for convenience of description, the upper node 100 is referred to as the transmitter 100 and the lower node 200 is referred to as the receiver 200 hereinafter.

The number of transmission antennas of the transmitter 100 is defined as M, the number of simultaneously transmitted data streams as L, and the number of antennas of the receiver 200 as N=2L.

The transmitter 100 includes a serial-to-parallel divider 110, a space-time encoder 120, a precoder 130, and an antenna unit 140.

The serial-to-parallel divider 110 divides a modulated symbol into L data streams through serial-to-parallel (S/P) conversion when a modulated symbol is input.

The space-time encoder 120 performs space-time encoding on each data stream.

The pre-encoder 130 pre-encodes the entire time-space coded signal using the channel state information and transmits it using M transmit antennas.

Also, the precoder 130 selects an antenna shuffling pattern that maximizes space-time line decoding performance of the receiver from among receive antenna shuffling patterns. Selection of such a mixed pattern will be described in detail later with reference to FIG. 5 .

The antenna unit 140 includes M transmission antennas, and transmits a plurality of pre-coded data streams through the plurality of transmission antennas.

In one embodiment, the transmitter 100 may further include a channel estimation unit 150.

The channel estimator 150 estimates channel state information (CSI) necessary for designing the precoder 130 using an uplink transmission signal.

In addition, when designing a precoder, an antenna shuffling pattern that maximizes space-time line decoding performance of a receiver is selected from possible receive antenna shuffling patterns.

Referring to FIGS. 1 and 3 , the receiver 200 may include an antenna unit 210, a mixing unit 220, a decoding unit 230, and a unifying unit 240.

The antenna unit 210 includes N receiving antennas and receives multiple data streams through the multiple receiving antennas.

The mixing unit 220 performs a reception antenna mixing procedure by applying a mixing pattern used when designing a precoder in the transmitter 100. At this time, the mixed pattern of the antennas used by the transmitter 100 is transmitted from the transmitter 100 through a separate channel, or the mixing unit 220 uses the antenna mixture pattern information available to the transmitter 100 to obtain the actual received signal. You can find the used antenna mix pattern.

Next, the mixer 220 divides the signal into L data streams.

The decoder 230 performs multi-space-time line decoding on each data stream.

The unifying unit 240 obtains a restored single data symbol through a Parallel-to-Serial (P/S) process.

4 is a diagram showing the structure of a space-time encoder according to an embodiment of the present invention.

Referring to FIG. 4, the space-time coder divides into two pieces of data to which space-time encoding is applied (l=1,2,...,L) when two symbols x _2l-1 and x _2l are sequentially input from the L-th data stream. print out In the first symbol period, x _2l-1 and x _2l are output, respectively, and in the second symbol period, -x ^* _2l and x ^* _2l-1 are output, respectively. In this case, * means a complex conjugation. The space-time coded symbol is represented by the following matrix like the Alamouti code.

Here, the Alamouti code is a representative time-space block code used in a inequality transmission method for two antennas that provides second order inequality for complex-valued signals. A similar unequal transmission system may be implemented in the code domain. For example, two copies of the same symbol can be transmitted side by side using two orthogonal Walsh codes. Similar techniques may be used to build a space-frequency coding method.

5 is a diagram showing the structure of a pre-encoder according to an embodiment of the present invention.

Referring to FIG. 5, the precoder overlaps the encoded matrix of each data stream and defines a 2L × 2 matrix X as follows.

The precoder is defined as an M × 2L matrix, and the precoding process is expressed as matrix multiplication as follows.

S = VX

At this time, the output S of the precoder is given as an M × 2 matrix. A signal received after passing through a multi-antenna channel is expressed as follows after going through a reception antenna mixing process.

R = [r ₁ r ₂ ] = P(HVX + N)

In this case, R is a 2L × 2 received signal matrix, P is a 2L × 2L permutation matrix, H is a 2L × M matrix representing a multi-antenna channel, and N is a 2L × 2 noise matrix.

6 is a diagram showing the structure of a decoder according to an embodiment of the present invention.

Referring to FIG. 6, in the decoder, the received signal vector r _t in the received signal matrix is expressed as follows.

The received signal corresponding to the Lth data stream is {r _(2l-1),1 r _2l,1 } when t = 1, {r _(2l-1),2 r _2l,2 } when t = 2 and is sequentially input to the space-time line decoder. Using this, symbols corresponding to the transmitted symbols x _2l-1 and x _2l are restored as follows.

At this time, g represents the effective channel gain of the multi-space-time line code.

7 is a flowchart illustrating a data transmission/reception method using multi-space-time line coding and decoding according to an embodiment of the present invention.

In step S110, the transmitter divides a plurality of modulated input symbols into a plurality of data streams through serial-to-parallel conversion.

In step S120, the transmitter performs multi-space-time encoding on each of a plurality of data streams.

In step S130, the transmitter pre-encodes the coded data stream using channel state information.

In step S140, the plurality of data streams on which the precoding is performed are transmitted through a plurality of transmit antennas.

In step S150, a receiver performs multi-space-time line decoding by receiving the plurality of data streams through a plurality of receive antennas.

In step S160, the receiver restores the signal on which the space-time line decoding has been performed into a single data symbol through parallel-to-serial conversion.

8 is a flowchart illustrating a method of determining a reception antenna mixing pattern in the precoding process of FIG. 5 according to an embodiment of the present invention.

In step S131, all possible patterns commonly applicable to the precoder of the transmitter and the antenna mixing block of the receiver are defined as a set P.

P = {P ₁ , P ₂ , . . . , P _A }

In this case, A denotes the number of usable antenna mixture patterns, and Pi is a 2L X 2L substitution matrix representing the _i -th reception antenna mixture pattern.

In step S132, i = 1 is set as an initial value.

In step S133, a precoder V _i is calculated according to a predetermined reception performance criterion using the antenna mixture pattern P _i . At this time, zero-forcing, minimum mean square error (MMSE), maximization of sum rate, maximization of signal-to-interference-plus-noise ratio (SINR), etc. can be used as reception performance standards. . For example, when MMSE is used as a criterion for reception performance, the precoder calculates as follows.

At this time ||A|| _F denotes the Frobenius norm of matrix A, A ^H and A ^T denote the Hermision and transposed matrix of matrix A, respectively, σ ² is the variance of each element of the noise matrix N, and E[|x _i | ² ] = ρ, and I _2L is 2L×2L It is an identity matrix. Also , Q _2L is defined as:

이고, L개의 Q₂ 행렬로 block diagonal 연산을 수행해서 Q_2L을 생성한다.At this time

, and Q _2L is generated by performing a block diagonal operation with L Q ₂ matrices.

와 같이 MMSE에 기반해서 사전부호화기를 설계하고, 수신기에서 합산 전송률을 수신 성능으로 사용할 경우 ρ_i는 다음과 같이 계산된다.In step S134, when a signal is transmitted using the precoder V _i , reception performance is calculated when the receiver performs decoding in the same manner as described above. as an example

When a precoder is designed based on MMSE as in , and the summation rate is used as the reception performance in the receiver, ρ _i is calculated as follows.

In this case, q _i,l represents the mean square error (MSE) of the Lth data stream in the receiver when the precoder V _i and the receiving antenna mixture pattern P _i are used.

In step S135, it is checked whether i is the number A of usable antenna mixture patterns. If i is less than the number A of mixed patterns, i is increased by 1 in step S2136, and then the process returns to step S133. That is, i = 1,2,... ,A, repeat steps S133 and S134 to obtain ρ ₁ , ρ ₂ , . . . , find ρ _A. In step S135, if i is not smaller than the number A of mixed patterns, the process proceeds to step S137.

In step S135, {ρ ₁ , ρ ₂ , . . . , ρ _A }, find the index c corresponding to the maximum value, and use this to define the precoder and antenna mixture pattern as V = V _c , P = P _c .

9 is a flowchart illustrating a method of determining a receive antenna mixing pattern according to an embodiment of the present invention.

If the transmitter side does not know the used antenna mixing pattern, the reception antenna mixing pattern is determined through the following method. That is, the mixed pattern P used by the transmitter When transmitting to a receiver using a separate channel, this method is not used.

In step S210, all possible patterns commonly applicable to the precoder of the transmitter and the antenna mixing block of the receiver are defined as a set P. The method is the same as step S110 of FIG. 8 .

In step S220, i = 1 is set as an initial value.

In step S230, space-time line decoding is performed after applying the antenna mixing pattern P _i to the received signal.

In step S240, a received signal quality indicator g _i is calculated. SINR, sum bit rate, reciprocal of MSE, etc. can be used as the received signal quality index.

를 구한다. 단계 S250에서, i가 혼합 패턴의 수 A 보다 작지 않은 경우, 단계 S270으로 진행한다. In step S250, it is checked whether i is the number A of usable antenna mixture patterns, and if i is less than the number A of mixed patterns, i is increased by 1 in step S260, and then the process returns to step S230. That is, i = 1,2,... Received signal quality indicators for all mixed patterns by repeating steps S230 and S240 above for ,A

save In step S250, if i is not smaller than the number A of mixed patterns, the process proceeds to step S270.

의 최대값에 대응되는 인덱스 c를 찾고, 이를 이용해서 사전부호화기와 안테나 혼합 패턴을 V = V_c, P = P_c로 정의한다.In step S270, received signal quality indicators for all mixed patterns

Find the index c corresponding to the maximum value of , and use it to define the precoder and the antenna mixture pattern as V = V _c and P = P _c .

The multi-space-time line encoding and decoding data transmission/reception method proposed in the present invention can be used for one-to-one communication between a transmitter and a receiver as described in FIG. It can also be used when data is transmitted from one transmitter to multiple terminals in downlink.

10 to 12 are diagrams showing the structure of a data receiver according to another embodiment of the present invention.

Referring to FIG. 10, a receiver structure is shown in a case where there are a total of six receiver antennas and one terminal receives all transmitter signals. In this case, the receiver structure is the same as that of FIG. 3 .

11 is a diagram showing a receiver structure in the case of using a total of two receivers, one receiver (MS1) with four antennas and one receiver (M2) with two antennas according to an embodiment of the present invention. Terminal 1 (MS1) and terminal 2 (M2) may be spatially located in different places.

Since there are six receiving antennas in total, the transmitter simultaneously transmits three data streams, receives two data streams from terminal 1 (MS1), and receives one data stream from terminal 2 (MS2). In the case of terminal 1 (MS1), the receiver structure of FIG. 3 is set to L = 2, and in case of terminal 2 (MS2), since a single data stream is received, data is restored using the existing space-time line code.

Similar to the one-to-one communication described in FIG. 3, the transmitter uses channel state information, and the receiver uses only information about the effective channel gain g.

Referring to FIG. 12, it is a diagram showing the structure of a receiver when three receivers having two antennas are used.

Since the total number of receiving antennas is 6, the transmitter simultaneously transmits three data streams, and each of terminal 1, terminal 2, and terminal 3 receives one data stream. At this time, all three terminals restore data using the existing space-time line decoding. In this case, as in FIGS. 3 and 11, the transmitter uses the channel state information, and the receiver uses only information about the effective channel gain g. Also, device 1, device 2, and device 3 may be spatially located in different places.

Although specific embodiments according to the present invention have been described so far, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, but should be defined by not only the scope of the claims to be described later, but also those equivalent to the scope of these claims.

As described above, the present invention has been described by the limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art in the field to which the present invention belongs can make various modifications and transformation is possible Therefore, the spirit of the present invention should be grasped only by the claims described below, and all equivalent or equivalent modifications thereof will be said to belong to the scope of the spirit of the present invention.

Claims (20)

Dividing, by a transmitter, a plurality of modulated input symbols into a plurality of data streams through serial-to-parallel conversion;
performing, by the transmitter, multi-space-time encoding on each of a plurality of data streams;
performing pre-coding on the plurality of coded data streams by the transmitter using channel state information estimated using an uplink transmission signal in a channel estimation unit of the transmitter;
transmitting the plurality of data streams on which the precoding is performed through a plurality of transmit antennas;
performing, by a receiver, multi-space-time line decoding by receiving the plurality of data streams through a plurality of receive antennas; and
In the data transmission/reception method using multi-space-time line coding and decoding, comprising the step of restoring, by the receiver, the space-time line-decoded signal into a single data symbol through parallel-to-serial conversion,
The performing of the precoding may include setting an antenna mixing pattern for a plurality of reception antennas provided in a receiver by the transmitter and performing the precoding according to a preset reception performance standard using the set antenna mixing pattern. Data transmission and reception method using multi-space-time line coding and decoding.
delete According to claim 1,
The step of performing the pre-coding,
defining, by the transmitter, a set of mixed patterns applicable to both the transmitter and the receiver;
calculating a precoder according to a predetermined reception performance criterion using an arbitrary mixed pattern included in a set of mixed patterns;
calculating reception performance of a receiver for each mixed pattern included in a set of defined mixed patterns using the precoder; and
Selecting a mixed pattern maximizing the calculated reception performance from among the mixed patterns included in the set of mixed patterns
Data transmission and reception method using multi-space-time line coding and decoding, characterized in that it comprises a.
According to claim 3,
In the step of calculating the precoder,
Multi-space-time characterized by using any one of zero-forcing, minimum mean square error (MMSE), sum rate maximization, and signal-to-interference-plus-noise ratio (SINR) maximization Data transmission and reception method using line encoding and decoding.
According to claim 1,
The step of performing the multi-space-time line decoding,
The receiver mixes a plurality of received data streams using the mixing pattern, divides the mixed signal into a plurality of data streams, and then performs multi-space-time line decoding on each data stream. Data transmission and reception method using encoding and decoding.
According to claim 5,
The step of performing the multi-space-time line decoding,
receiving, by the receiver, a mixed pattern from the transmitter
Data transmission and reception method using multi-space-time line coding and decoding, characterized in that it comprises a.
According to claim 5,
The step of performing the multi-space-time line decoding,
defining, by the receiver, a set of mixed patterns applicable to both the transmitter and the receiver;
performing space-time line decoding on each mixed pattern included in the set of mixed patterns;
calculating a received signal quality index for each mixing pattern; and
selecting a mixing pattern maximizing the received signal quality index;
Data transmission and reception method using multi-space-time line coding and decoding, characterized in that it comprises a.
A plurality of modulated input symbols are divided into a plurality of data streams through serial-to-parallel conversion, multi-space-time encoding is performed on each of the plurality of data streams, and channel state information estimated using an uplink transmission signal in a channel estimation unit A transmitter for transmitting a plurality of data streams pre-coded using a plurality of transmit antennas; and
In a data transmission/reception system using multi-space-time line coding and decoding including a receiver for receiving the plurality of data streams through a plurality of receiving antennas, performing multi-space-time line decoding, and restoring a single data symbol through parallel-to-serial conversion ,
The transmitter uses multi-space-time line coding and decoding to set antenna mixture patterns for a plurality of reception antennas provided in the receiver and perform the precoding according to a preset reception performance standard using the set antenna mixture patterns. Data sending and receiving system.
delete According to claim 8,
The transmitter defines a set of mixed patterns applicable to both the transmitter and the receiver, calculates a precoder according to a predetermined reception performance criterion using an arbitrary mixed pattern included in the set, and calculates the precoder calculating the reception performance of the receiver for each mixed pattern included in the set of mixed patterns defined using the multi-pattern, and selecting a mixed pattern that maximizes the calculated reception performance among the mixed patterns included in the set. Data transmission and reception system using space-time line coding and decoding.
According to claim 10,
The transmitter uses any one of zero-forcing, minimum mean square error (MMSE), sum rate maximization, and signal-to-interference-plus-noise ratio (SINR) maximization to calculate the precoder. Data transmission and reception system using multi-space-time line coding and decoding.
According to claim 8,
The receiver mixes a plurality of received data streams using the mixing pattern, divides the mixed signal into a plurality of data streams, and then performs multi-space-time line decoding on each data stream. Data transmission and reception system using encoding and decoding.
According to claim 12,
The data transmission/reception system using multi-space-time line coding and decoding, characterized in that the receiver receives the mixed pattern from the transmitter.
According to claim 12,
The receiver defines a set of mixed patterns applicable to both the transmitter and the receiver, performs space-time line decoding on each mixed pattern included in the set, calculates a received signal quality index for each mixed pattern, and A data transmission/reception system using multi-space-time line coding and decoding, characterized in that a mixed pattern that maximizes a quality index is selected.
According to claim 14,
Characterized in that the received signal quality indicator is any one of the reciprocal of SINR, sum bit rate, and MSE
Data transmission and reception system using multi-space-time line coding and decoding.
a serial-to-parallel divider for dividing a plurality of modulated input symbols into a plurality of data streams through serial-to-parallel conversion;
a space-time encoder that performs multi-space-time encoding on each of a plurality of data streams;
a pre-encoder for performing pre-coding using channel state information estimated by using the uplink transmission signal in the channel estimation unit; and
A data transmission apparatus using multi-space-time line coding comprising an antenna unit for transmitting a plurality of pre-coded data streams through a plurality of transmission antennas,
The pre-encoder sets an antenna mixture pattern for a plurality of reception antennas provided in a receiver, and transmits data using multi-space-time line coding to perform the pre-coding according to a predetermined reception performance standard using the set antenna mixture pattern. Device.
delete According to claim 16,
The precoder defines a set of mixed patterns applicable to both the transmitter and the receiver, calculates a precoder according to a predetermined reception performance criterion using an arbitrary mixed pattern included in the set, and calculates the precoder calculating the reception performance of the receiver for each mixed pattern included in the set of mixed patterns defined using the multi-pattern, and selecting a mixed pattern that maximizes the calculated reception performance among the mixed patterns included in the set. Data transmission device using space-time line coding.
According to claim 18,
The precoder uses any one of zero-forcing, minimum mean square error (MMSE), sum rate maximization, and signal-to-interference-plus-noise ratio (SINR) maximization A data transmission device using multi-space-time line coding.
According to claim 16,
The data transmission device using multi-space-time line coding, characterized in that the number of data streams simultaneously transmitted through the antenna unit is twice the number of the transmission antennas.

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