KR20140129950A - transmission, reception and system using multiple antennas - Google Patents

transmission, reception and system using multiple antennas Download PDF

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Publication number
KR20140129950A
KR20140129950A KR1020130048930A KR20130048930A KR20140129950A KR 20140129950 A KR20140129950 A KR 20140129950A KR 1020130048930 A KR1020130048930 A KR 1020130048930A KR 20130048930 A KR20130048930 A KR 20130048930A KR 20140129950 A KR20140129950 A KR 20140129950A
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South Korea
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transmission
data
transmission signals
signal
symbol stream
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KR1020130048930A
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Korean (ko)
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장석호
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인텔렉추얼디스커버리 주식회사
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Priority to KR1020130048930A priority Critical patent/KR20140129950A/en
Publication of KR20140129950A publication Critical patent/KR20140129950A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0606—Space-frequency coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0637—Properties of the code
    • H04L1/0668—Orthogonal systems, e.g. using Alamouti codes

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)

Abstract

Various embodiments for transmission, reception, and systems using multiple antennas are disclosed. In one embodiment, the transmitter includes: a first transmission signal generator for receiving first data and generating first transmission signals to be transmitted through a plurality of first transmission antennas; And a second transmission signal generator for receiving second data and generating second transmission signals to be transmitted through a plurality of second transmission antennas. Each of the first transmission signals includes a first symbol stream of a first coded symbol stream, a first symbol stream generated by applying a coding scheme for multi-antenna transmission to the first data, and each of the second transmission signals includes a plurality of And the second coded symbol streams - generated by applying the multi-antenna transmission coding to the second data - as signal components. The first transmission signals and the second transmission signals are simultaneously transmitted using the same communication resources and the power averages of the signal components of the first coded symbol stream included in each of the first transmission signals are included in each of the second transmission signals May be greater than the power average of the signal components of the second coded symbol stream.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates generally to transmission, reception, and systems using multiple antennas,

The disclosed techniques relate to transmission, reception, and systems using multiple antennas, and more particularly, to transmission, reception, and systems that can be applied to environments in which receiving devices with varying reception capabilities coexist.

Recently, multiple-input multiple-output (MIMO) systems have received much attention and are being extensively studied. Because it provides much greater system capacity and diversity than single-antenna systems, it has been adopted in many wireless communications standards and there are already commercial products. Various multi-antenna transmission techniques have been studied, and they can be classified into two types. The first is a spatial multiplexing technique and the second is a transmit diversity technique.

The spatial multiplexing technique increases the system capacity without additional bandwidth extension by sending independent signals to each transmit antenna. A representative example is V-BLAST and the like. Transmit diversity techniques provide diversity and coding gain. A typical example is an Orthogonal Space-Time Block Code (OSTBC) such as Alamouti code.

On the other hand, transmission apparatuses and receiving apparatuses that support multiple antennas and have more antennas and more diversity are emerging.

Accordingly, an efficient multi-antenna transmission / reception technique may be required in consideration of an environment in which there are receiving devices having various receiving capabilities (e.g., the number of receiving antennas, a decodable multi-antenna transmission technique, etc.).

According to an aspect of the present invention, there is provided a mobile station comprising: a first transmission signal generator for receiving first data and generating first transmission signals to be transmitted through a plurality of first transmission antennas; And a second transmission signal generator for receiving second data and generating second transmission signals to be transmitted through a plurality of second transmission antennas. Each of the first transmission signals includes a first symbol stream of a first coded symbol stream, a first symbol stream generated by applying a coding scheme for multi-antenna transmission to the first data, and each of the second transmission signals includes a plurality of The first transmission signals and the second transmission signals are transmitted at the same time using the same communication resources, and the first transmission signals and the second transmission signals are transmitted at the same time The power average of the signal components of the first coded symbol stream included in each of the first transmission signals may be greater than the power average of the signal components of the second coded symbol stream included in each of the second transmission signals.

According to another aspect of the present disclosure, there is provided a method of generating a symbol stream, the method including: generating a first symbol stream by symbol mapped first data; Generating a second symbol stream by symbol mapping second data; Generating a plurality of first coded symbol streams by applying multi-antenna transmission coding to the first symbol stream; Generating a plurality of second coded symbol streams by applying multi-antenna transmission coding to the second coded symbol stream; Processing the plurality of first coded symbol streams to generate a plurality of first transmission signals; Processing the plurality of second coded symbol streams to generate a plurality of second transmission signals; And transmitting the plurality of first transmission signals through a plurality of first transmission antennas and transmitting the plurality of second transmission signals through a plurality of second transmission antennas. The first transmission signals and the second transmission signals are simultaneously transmitted using the same communication resource and the power averages of the signal components of the first coded symbol stream included in each of the first transmission signals are transmitted to each of the second transmission signals May be greater than the power mean of the signal components of the included second coded symbol stream.

Yet another aspect of the present disclosure provides a receiver comprising: a receiver for receiving a radio signal through at least one receive antenna and outputting at least one received signal; And a symbol detector for detecting the first and second symbol streams based on the at least one received signal. The wireless signal may include first transmission signals transmitted through a plurality of first transmission antennas and second transmission signals transmitted through a plurality of second transmission antennas. Each of the first transmission signals includes a corresponding symbol stream as a signal component among a plurality of first coded symbol streams - first data is generated by applying encoding for multi-antenna transmission, and each of the second transmission signals includes a plurality of 2 coded symbol streams - generated by applying multi-antenna transmission coding to the second data, as signal components. The first transmission signals and the second transmission signals are simultaneously transmitted using the same communication resource and the power averages of the signal components of the first coded symbol stream included in each of the first transmission signals are transmitted to each of the second transmission signals May be greater than the power mean of the signal components of the included second coded symbol stream.

Another aspect of the present disclosure provides a method comprising: receiving a radio signal through at least one receive antenna to generate at least one receive signal; And detecting the first and second symbol streams based on the at least one received signal. The wireless signal may include first transmission signals transmitted through a plurality of first transmission antennas and second transmission signals transmitted through a plurality of second transmission antennas. Each of the first transmission signals includes a corresponding symbol stream as a signal component among a plurality of first coded symbol streams - first data is generated by applying encoding for multi-antenna transmission, and each of the second transmission signals includes a plurality of 2 coded symbol streams - generated by applying multi-antenna transmission coding to the second data, as signal components. The first transmission signals and the second transmission signals are simultaneously transmitted using the same communication resources and the power averages of the signal components of the first coded symbol stream included in each of the first transmission signals are included in each of the second transmission signals May be greater than the power average of the signal components of the second coded symbol stream.

This Summary is provided to introduce any of the concepts further described in the following detailed description in a simplified form. This Summary is not intended to identify key features or essential features of the claimed subject matter nor is it intended to be used to limit the scope of the claimed subject matter. Furthermore, the claimed subject matter is not limited to implementations that solve some or all of the problems mentioned in any part of this specification. In addition to the exemplary aspects, embodiments, and features described above, additional aspects, embodiments, and features will become apparent with reference to the following detailed description and drawings.

Some embodiments of the present disclosure may have effects that include the following advantages. It should be understood, however, that the scope of the present invention should not be construed as being limited thereby.

According to some embodiments, efficient multi-antenna transmission / reception may be performed in an environment in which there are receiving devices having various receiving capabilities (e.g., number of receiving antennas, decodable multi-antenna transmission technique, etc.).

According to some embodiments, efficient broadcast data transmission can be achieved.

1 illustrates a system using multiple antennas according to an embodiment.
2 is a block diagram illustrating a transmitting apparatus according to one embodiment.
3 is a block diagram illustrating a transmission signal generator according to an embodiment of the present invention.
4 is a block diagram illustrating a receiving device in accordance with one embodiment.
5 is a flowchart illustrating a transmission method according to an embodiment.
6 is a flow chart illustrating a receiving method according to one embodiment.

In the following detailed description, reference is made to the accompanying drawings which form a part of this disclosure. In the drawings, like symbols generally denote like elements unless the context clearly indicates otherwise. The illustrative embodiments set forth in the description, drawings, and claims are not intended to be limiting. Other embodiments may be used and other changes may be made without departing from the scope and spirit of the objects set forth in this disclosure. Aspects of the present disclosure, as generally described herein and illustrated in the figures, may be arranged, substituted, combined, separated and designed in a wide variety of different configurations, all of which are expressly contemplated in the present disclosure Will be clearly understood.

1 illustrates a system using multiple antennas according to an embodiment.

1, the system 100 may include a transmitting apparatus 110 having a plurality of transmit antennas and receiving apparatuses 120_1, 120_2, ..., 120_N having various numbers of receive antennas have.

Generally, the more the number of transmit antennas and the number of receive antennas, the more efficient and various multi-antenna techniques can be used. For example, if the number of transmit antennas is M and the number of receive antennas is N, if N is greater than or equal to M, the data rate (or symbol rate) may be increased by M times using a spatial multiplexing technique. On the other hand, when the number of the receiving antennas is 1, the spatial multiplexing technique can not be used and the data transmission rate can not be increased. In this case, the transmission diversity technique is used to obtain high diversity. The transmission diversity scheme is a coding scheme that can be used regardless of the number of receiving antennas.

Generally, in a situation where a high data rate is required, a spatial multiplexing technique is more advantageous than a transmission diversity technique. However, in the case of the broadcasting system, terminals having different numbers of receiving antennas are mixed in the service area as described above. Therefore, in the transmitter, it is inevitable to transmit data using a multi-antenna coding scheme capable of decoding even a terminal having the smallest receive antenna. For example, when using the spatial multiplexing technique described above, terminals with N <M can not decode the transmitted signal.

The system 100 may include, but is not necessarily limited to, a cellular communication system, a broadcasting system, and an ad hoc communication system. In the case of a cellular communication system, the transmitting apparatus 110 may be included in the base station, and each of the receiving apparatuses 120_1, 120_2, ..., 120_N may be included in the user terminal. In the broadcasting system, the transmitting apparatus 110 may be included in the broadcasting signal transmitting station, and each of the receiving apparatuses 120_1, 120_2, ..., 120_N may be included in the broadcasting receiving terminal. In the case of an ad hoc communication system, each of the transmitting apparatus 110 and the receiving apparatuses 120, 130 and 140 may be an ad hoc terminal.

The transmitting apparatus 110 transmits data in a broadcast manner to the receiving apparatuses 120_1, 120_2, ..., 120_N using the multi-antenna transmission scheme or transmits the data to the receiving apparatuses 120_1, 120_2, ..., 120_N ) Can transmit data in a unicast manner.

When the transmitting apparatus 110 can grasp the receiving performance of the target receiving apparatuses 120_1, 120_2, ..., or 120_N in advance when transmitting data in a unicast manner, can do. The reception performance may include a decodable multi-antenna transmission scheme, a channel state, and the like. For example, if the channel state is good, the transmitting apparatus 110 can transmit data using a multi-antenna transmission scheme that provides a maximum transmission rate.

 When the transmitting apparatus 110 transmits data to the receiving apparatuses 120_1, 120_2, ..., 120_N in a multicast or broadcast manner, all of the target receiving apparatuses 120_1, 120_2, ..., 120_N Should be able to decode the desired signal.

2 is a block diagram illustrating a transmitting apparatus according to one embodiment.

2, the transmission apparatus 110 includes a data source 210, a first transmission signal generator 220, a second transmission signal generator 240, a plurality of first transmission antennas 230_1, 230_2, ..., and 230_K, and a plurality of second transmission antennas 250_1, 250_2, ..., and 250_M.

The data source 210 may generate the first data d (1 ) and the second data d (2) .

The first data d (1) and the second data d (2) may be base layer data and enhancement layer data of scalable video data, respectively. The base layer data is more important than the enhancement layer data, and if the base layer data is not successfully received, the video image can not be restored at all. On the other hand, if only the base layer data is successfully received, the image is restored to a low quality. In addition, the enhancement layer data must be restored to obtain additional quality improvement. In other words, base layer data is a class that must be received and restored, whereas enhancement layer data is a class that must be received and restored for better quality, so base layer data is generally stronger in error than enhancement layer data. .

The first transmission signal generator 220 receives the first data d (1) and generates first transmission signals (first transmission signals) to be transmitted through the first transmission antennas 230_1, 230_2, ..., y (1) 1 , y (1) 2 , ..., y (1) K ). The first transmission signal s (y (1) 1, y (1) 2, ..., y (1) K) each includes a plurality of first encoding symbol columns (c (1) 1, c (1) 2, ..., c (1) K) - first data (d (1)) in the multi-antenna transmission for encoding (for example, by Alamouti coding, another example, space-time block encoding, space-frequency block as another example Encoding) to generate a signal stream.

The second transmission signal generator 240 receives the second data d (2) and transmits the second transmission signals (d (2) ) to be transmitted through the plurality of second transmission antennas 250_1, 250_2, ..., y (2) 1 , y (2) 2 , ..., y (2) M ). Claim 2 of the transmitted signal (y (2) 1, y (2) 2, ..., y (2) M) each of the plurality of second encoding symbol columns (c (2) 1, c (2) 2, ..., c (2) M) - second data (d (2)) to the multi-antenna transmission for encoding (for example, Alamouti encoding, as another example, space-time block encoding, space-frequency block as another example Encoding) to generate a signal stream.

3 is a block diagram illustrating a transmission signal generator according to an embodiment of the present invention.

More specifically, the first transmission signal generator 220 of FIG. 2 in the case of having two transmission antennas is illustrated. The case where the number of transmission antennas is varied and the case of the second transmission signal generator 240 can also be explained on the same principle.

Referring to FIG. 3, the first transmission signal generator 220 may include a symbol mapper 310, an encoder 320, and two antenna path blocks 330_1 and 330_2.

The symbol mapper 310 can generate the first symbol stream s (1) by symbol mapped the first data d (1) .

The encoding unit 320 may generate a plurality of first coded symbol streams c (1) 1 , c (1) 2 ) by applying multi-antenna transmission encoding to the first symbol stream s (1) .

The antenna path blocks 330_1 and 330_2 process the corresponding symbol stream among the plurality of first coded symbol streams c (1) 1 and c (1) 2 to generate the first transmission signals y (1) 1 and y (1) 2 ).

Referring to FIG. 3, the antenna path blocks 330_1 and 330_2 may include modulators 332_1 and 332_2 and amplifiers 334_1 and 334_2.

The first symbol stream may be transmitted at a higher power than the second symbol stream to provide unequal error protection that makes the channel error more robust. In one embodiment, the first transmission signal s (y (1) 1, y (1) 2, ..., y (1) K) and the second transmission signal (y (2) 1, y (2 ) 2, ..., y (2 ) M) is transmitted using the same communication resources at the same time, the first transmission signal (y (1) 1, y (1) 2, ..., y (1) K) the average power of the second transmission signal in the first encoding symbol column signal component (c '(1) 1, c' (1) 2, ..., c '(1) K) contained in each of (y (2) 1, y (2 ) 2, ..., y (2) M) the second encoding symbol column signal components included in each of (c '(2) 1, c' (2) 2, ... , c ' (2) M ). In one embodiment, the symbol mappers included in the first and second transmission signal generators 220 and 240 use the first and second signal constellation diagrams, respectively, and the signal s (1) on the first signal constellation diagram, (2) ) on the second constellation diagram, and the encoding units included in the first and second transmission signal generators 220 and 240 perform the same signal processing, The first and second antenna path blocks included in the first and second transmission signal generators 220 and 240 may perform the same signal processing. In another embodiment, the symbol mappers included in the first and second transmission signal generators 220 and 240 perform the same signal processing, and the coding units included in the first and second transmission signal generators 220 and 240 The modulator included in the first and second transmission signal generators 220 and 240 performs the same signal processing and the gain of the amplifier included in the first transmission signal generator 220 is equal to May be greater than the gain of the amplifier included in the second transmission signal generator 240.

4 is a block diagram illustrating a receiving device in accordance with one embodiment.

4, the receiving apparatus 120 includes first to Nth receiving antennas 410_1, 410_2, ..., 410_N, a receiving unit 420, a symbol detecting unit 430, and a data detecting unit 440 can do. In one example, N = 1 for the first receiving device 110 and N = 2 for the second receiving device 120 in FIG.

The receiving unit 420 receives the radio signals through the first to Nth receiving antennas 410_1, 410_2, ..., and 410_N and outputs the first to Nth receiving signals r 1 (0) , r 2 (0) ..., r N (0) . Here, the wireless signal may include first transmission signals transmitted through the plurality of first transmission antennas and second transmission signals transmitted through the plurality of second transmission antennas, which are described above with reference to FIG. 2 and FIG.

In one embodiment, N is equal to or greater than 2, as in the second receiving apparatus 120_2 of FIG. 1, and the symbol detecting unit 430 includes a first decoding unit 432_1 And a second decoding unit 432_2. A first decoding unit (432_1), a plurality of first encoded symbol columns (c (1) 1, c (1) 2, ..., c (1) K) corresponding to the multi-antenna transmission for encoding that was used to generate depending on the decoding scheme that is, the first through the N received signals (r 1 (0), r 2 (0), ..., r N (0)) may be detected by decoding the first symbol column. The second decoding unit 432_2 extracts the detected first symbol stream ( 0 ) from the first to Nth received signals r 1 (0) , r 2 (0) , ..., r N

Figure pat00001
(R 1 (1) , r 2 (1) , ..., r N (1) ) obtained by removing the signal components of the first coded symbol streams (S (2) ) by decoding according to a decoding technique corresponding to coding.

In another embodiment, the receiving apparatus 120 has N equal to 1, as in the first receiving apparatus 120_1 of FIG. 1, and the symbol detecting unit 430, unlike the one shown in FIG. 4, 432_1.

The data detector 440 may detect the first data using the detected first symbols and may detect the second data using the detected second symbols.

5 is a flowchart illustrating a transmission method according to an embodiment.

The transmission methods of the present disclosure may be performed through various software, hardware, and combinations thereof. For convenience, it will be described with reference to FIG. 2, FIG. 3, and FIG. 5, assuming that it is performed through the transmitting apparatus 110 of FIG. The detailed operation examples of the transmission apparatus 110 described above can be applied to the transmission method of the present disclosure, so redundant explanations will be omitted.

The symbol mapper of the first transmission signal generator 220 generates a first symbol stream by symbol mapping the first data and the symbol mapper of the second transmission signal generator 240 symbol maps the second data, And a symbol string is generated (S510).

The coding unit of the first transmission signal generating unit 220 generates a plurality of first coded symbol streams by applying the coding for multi-antenna transmission to the first symbol stream, and the second transmission signal generating unit 240 generates A plurality of second coded symbol streams are generated by applying an antenna transmission coding scheme (S520).

The antenna path blocks of the first transmission signal generator 220 process a plurality of first coded symbol streams to generate a plurality of first transmission signals and the antenna path blocks of the second transmission signal generator 240 generate a plurality of The second coded symbol streams are processed to generate a plurality of second transmission signals (S530).

The generated first transmission signals and second transmission signals are wirelessly transmitted through corresponding transmission antennas (S540). In one embodiment, the first transmission signals and the second transmission signals are simultaneously transmitted using the same communication resource, and a power average of signal components of the first coded symbol stream included in each of the first transmission signals is 2 transmission signals included in the second coded symbol stream.

6 is a flow chart illustrating a receiving method according to one embodiment.

The receiving method of the present disclosure may be performed through various software, hardware, and combinations thereof. For convenience, it is performed through the receiving apparatus 120 of FIG. 4, in which first transmission signals are generated using base layer data and Alamouti coding, and second transmission signals are generated using enhancement layer data and Alamouti coding It will be described with reference to FIGS. 4 and 6. FIG. The detailed operation examples of the reception apparatus 120 described above can be applied to the transmission method of the present disclosure, so that redundant description will be omitted.

First, the receiving apparatus 120 performs initialization (i = 1) (S610).

Next, the receiving apparatus 120 receives the signal R (1) That is, the Alamouti decoding for at least one received signal (r 1 (0), r 2 (0), ..., r N (0)) To restore the base layer (symbol string or data) (S615).

Next, the receiving apparatus 120 removes the restored base layer signal component from the received signal R (1) (S620), and performs anti-aliasing on the resultant signal R (i + 1) Symbol string or data) (S625).

If it is determined in step S630 that the iterative decoding has been performed in step S630, the receiving apparatus 120 ends decoding of the current received signal, otherwise proceeds to step S630. In step S630, (Symbol column or data) is restored by performing Alamouti decoding on the resultant signal R (i + 2) in step S635 and i = i + 2 update is performed in step S640 , The process returns to S620.

It should be noted that even though the base layer and the enhancement layer are transmitted through the spatial multiplexing technique, both layers can be decoded even with one receive antenna. This is because although the power of the symbol component corresponding to the base layer is larger than the gain 2 (for example, the power of the symbol component corresponding to the enhancement layer) even though the two layers are received overlapping each other, This is because the presence of the enhancement layer does not have a great influence when decoding. That is, the difference between the sizes of Gain 1 and Gain 2 not only provides differential error protection between the two layers, but also plays a role of enabling the spatial multiplexed signal to be decoded even when the number of receiving antennas is smaller than that of the transmitting antennas. Generally, in a multi-antenna system, the gain of a transmitting antenna must be equal to maximize the capacity of the system. However, in the case of video / image data, differential error protection is required because of the layer characteristics. Therefore, it is helpful to differentiate Gain 1 and Gain 2 from each other, and it also provides the advantage that a receiving terminal having one receiving antenna can decode . 6, steps S635, S640, and S645 and returning to step S620 are for implementing successive decoding, and steps S615, S620, and S625 are performed only once to complete the decoding. On the other hand, .

If the number of receiving antennas is four, the base layer and the enhancement layer are decoded using a minimum mean square error (MMSE) or a zero-forcing (ZF) method, which is a decoding method for a conventional spatial multiplexing technique, It is possible to decode it.

Some embodiments combine a multiple antenna system with a mobile digital broadcast system. Provides differential error protection for the base layer, which is a critical class of video / image, and the enhancement layer, which is a relatively less important class. Meanwhile, in the current mobile digital broadcasting system, a technique considering diversity of the number of receiving antennas of a terminal is not adopted. In the present disclosure, since the base layer and the enhancement layer arrive at the reception antennas with different gains, the terminals having only one reception antenna can successfully decode the two layers transmitted by the spatial multiplexing technique, respectively.

Skilled artisans will appreciate that in the present processes and methods and other processes and methods disclosed herein, the functions performed in the processes and methods may be implemented in different orders. It should also be understood that the steps and operations outlined above are provided by way of example only and that certain steps and operations are optional and may be combined in fewer steps and operations or may be combined with additional steps and operations without departing from the essence of the disclosed embodiments Can be expanded.

In an exemplary embodiment, any of the operations, processes, and the like described in this disclosure may be implemented with computer-readable instructions stored on a computer-readable medium. The computer-readable instructions may be executed by a processor, a network component, and / or any other computing device of the mobile device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. I will understand that. Accordingly, the true scope of the present invention should be determined by the appended claims.

Claims (10)

A first transmission signal generator for receiving first data and generating first transmission signals to be transmitted through a plurality of first transmission antennas; And
And a second transmission signal generator for receiving second data and generating second transmission signals to be transmitted through a plurality of second transmission antennas,
Wherein each of the first transmission signals includes a corresponding symbol stream among a plurality of first coded symbol streams, which is generated by applying multi-antenna transmission coding to the first data,
Wherein each of the second transmission signals includes a corresponding symbol stream among a plurality of second coded symbol streams, which is generated by applying multi-antenna transmission coding to the second data,
Wherein the first transmission signals and the second transmission signals are simultaneously transmitted using the same communication resource,
Wherein a power average of a signal component of a first coded symbol stream included in each of the first transmission signals is greater than a power average of signal components of a second coded symbol stream included in each of the second transmission signals. The method according to claim 1,
Wherein the first data comprises base layer data of scalable video data and the second data comprises enhancement layer data of the scalable video data. The method according to claim 1,
Wherein the plurality of first and second coded symbol streams are generated through Alamouti coding. The method according to claim 1,
Wherein the first and second coded symbol streams are generated through space time block coding or space frequency block coding. The method according to claim 1,
The first transmission signal generator
A symbol mapper for generating a first symbol stream by symbol mapping the first data;
An encoding unit for generating the plurality of first coded symbol streams by applying multi-antenna transmission encoding to the first symbol stream; And
A plurality of first antenna path blocks for processing a corresponding symbol stream among the plurality of first coded symbol streams to generate a corresponding transmission signal among the first transmission signals,
The second transmission signal generator
A symbol mapper for generating a second symbol stream by symbol mapping the second data;
An encoding unit for generating the plurality of second coded symbol streams by applying multi-antenna transmission encoding to the second symbol stream; And
And a plurality of second antenna path blocks for processing a corresponding symbol stream among the plurality of second coded symbol streams to generate a corresponding transmission signal of the second transmission signals. 6. The method of claim 5,
Wherein the symbol mapper included in the first and second transmission signal generators use first and second signal constellation diagrams, respectively,
Wherein the power mean of the signal on the first signal constellation is greater than the power mean of the signal on the second constellation,
The encoding units included in the first and second transmission signal generators perform the same signal processing,
Wherein the first and second antenna path blocks included in the first and second transmission signal generators perform the same signal processing. 6. The method of claim 5,
Wherein each of the first and second antenna path blocks includes a modulator and an amplifier,
The symbol mappers included in the first and second transmission signal generators perform the same signal processing,
The encoding units included in the first and second transmission signal generators perform the same signal processing,
The modulators included in the first and second transmission signal generators perform the same signal processing,
Wherein the gain of the amplifier included in the first transmission signal generator is larger than the gain of the amplifier included in the second transmission signal generator. Generating a first symbol stream by symbol mapping first data;
Generating a second symbol stream by symbol mapping second data;
Generating a plurality of first coded symbol streams by applying multi-antenna transmission coding to the first symbol stream;
Generating a plurality of second coded symbol streams by applying multi-antenna transmission coding to the second coded symbol stream;
Processing the plurality of first coded symbol streams to generate a plurality of first transmission signals;
Processing the plurality of second coded symbol streams to generate a plurality of second transmission signals; And
Transmitting the plurality of first transmission signals through a plurality of first transmission antennas and transmitting the plurality of second transmission signals through a plurality of second transmission antennas,
Wherein the first transmission signals and the second transmission signals are simultaneously transmitted using the same communication resource,
Wherein a power average of signal components of a first coded symbol stream included in each of the first transmission signals is greater than a power average of signal components of a second coded symbol stream included in each of the second transmission signals. 9. The method of claim 8,
Wherein the first data comprises base layer data of scalable video data and the second data comprises enhancement layer data of the scalable video data. 9. The method of claim 8,
Wherein the first and second coded symbol streams are generated through Alamouti coding.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180078330A (en) * 2010-12-10 2018-07-09 선 페이턴트 트러스트 Transmitting device
KR20200028335A (en) * 2017-07-20 2020-03-16 소니 주식회사 Transmitting device, transmitting method, receiving device and receiving method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180078330A (en) * 2010-12-10 2018-07-09 선 페이턴트 트러스트 Transmitting device
KR20200028335A (en) * 2017-07-20 2020-03-16 소니 주식회사 Transmitting device, transmitting method, receiving device and receiving method
US11736732B2 (en) 2017-07-20 2023-08-22 Saturn Licensing Llc Transmission device, transmission method, reception de-vice, and reception method

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