KR20170089391A - Apparatus and method for transmitting and receiving signal in wireless communication system - Google Patents

Abstract

The present invention relates to a 5th-generation (5G) or pre-5G communications system, provided for supporting higher data rates than a 4th-generation (4G) communications system such as a long term evolution (LTE). An operating method of a transmitting apparatus in a wireless communications system comprises the following processes of: detecting an achievable rate region for a receiving apparatus; and determining a modulation and coding scheme (MCS) level and a sliding window superposition coding (SWSC) massive multi-input multi-output (MIMO) scheme corresponding to the achievable rate region, wherein the achievable rate region is determined based on a precoding matrix generated based on a channel matrix between the transmitting apparatus, each of transmitting apparatuses other than the transmission apparatus, and the receiving apparatus.

Description

[0001] APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for transmitting and receiving signals in a wireless communication system, and more particularly, to a sliding window superposition coding (SWSC) multi- to an apparatus and method for transmitting and receiving signals in a wireless communication system using an input multi-output (MIMO) scheme.

4G (4 ^th -generation: 4G, hereinafter referred to as "4G" will be referred to) in order to meet the traffic demand in the radio data communication system increases since the commercialization trends, improved 5G (5 ^th -generation: 5G, the " 5G ") communication system or pre-5G (hereinafter referred to as "pre-5G ") communication system. For this reason, a 5G communication system or a pre-5G communication system may be used in a 4G network communication system or a long-term evolution (LTE) (post-LTE) .

In order to achieve a high data rate, the 5G communication system is considered to be implemented in a very high frequency (mmWave) band (for example, a frequency band such as a 60 gigahertz (60GHz) band). In order to mitigate the path loss of the radio wave in the very high frequency band and to increase the propagation distance of the radio wave, a 5G communication system has been used for beam forming, massive multi-input multi-output (massive MIMO) (FD-MIMO) technique, an array antenna technique, and an analog-to-digital (MIMO) Analog beam-forming techniques and large scale antenna technologies are being discussed.

In order to improve the network of the system, the 5G communication system has developed an advanced small cell, an advanced small cell, a cloud radio access network (cloud RAN), an ultra-dense network, A wireless device, a device to device (D2D) communication, a wireless backhaul, a moving network, a cooperative communication, coordinated multi-points (CoMP) , And interference cancellation are being developed.

In addition, in the 5G system, a hybrid frequency shift keying (FSK) scheme, which is an advanced coding modulation (ACM) scheme (hereinafter referred to as " ACM & A sliding window superposition coding (SWSC) method, a quadrature amplitude modulation (QAM) scheme, a hybrid FSK and QAM (FQAM) scheme, (FBMC) technology, a non-orthogonal multiple access (NOMA) technique, an advanced access technology, (Hereinafter referred to as " NOMA ") technology and sparse code multiple access (SCMA) technology are being developed.

Wireless communication systems are being developed in a variety of forms for the transmission of voice and / or data. A typical wireless communication system or network uses frequency division multiplexing (FDM) to allow a plurality of user equipment (UE) (hereinafter referred to as "UE " A time division multiplexing (TDM) scheme, a code division multiplexing (CDM) scheme, a time division multiplexing (TDM) scheme, And OFDM (Orthogonal Frequency Division Multiplexing (OFDM)) schemes, and the like. Here, the UE may be intermingled with terms such as a mobile station (MS), a wireless terminal, a mobile device, and the like.

On the other hand, a cellular wireless communication system provides a number of base stations (BSs) for a coverage area. Herein, the base station includes a node B, an evolved Node B (eNB), an evolved universal terrestrial radio access network (EBS) An E-UTRAN (E-UTRAN) Node B (eNB), and an access point (AP) ), And the like.

The base stations transmit data that the UE can independently receive, having a coverage area, such as a cell or a sector, that is inherently coverage area that can be partially overlapped with each other. Likewise, the UE may transmit data to the base station or other UE operating the coverage area of the UE itself in a similar manner.

On the other hand, in the next generation communication system, due to the interference problem between the cells, the size of the cell gradually becomes smaller, and thus an interference signal from adjacent cells becomes a desired signal (hereinafter referred to as a "desired signal" ) Is a major factor to degrade the detection efficiency of the sensor.

Accordingly, various schemes for interference mitigation have been proposed, and one of the representative techniques is interference-aware successive decoding (IASD) (hereinafter referred to as " IASD " to be. The IASD scheme has been developed to solve the problem in the cell edge region in a cellular wireless communication system, and is an interference-aware receiver capable of successfully decoding both a desired signal and an interference signal. ) Is used. Since the interference signal is not controllable by the UE, the IASD scheme requires support by the network.

Therefore, a network assisted interference cancellation and suppression (NAICS, hereinafter referred to as " NAICS ") scheme has been studied to enable the IASD scheme to be used in a cellular wireless communication system. In the NAICS scheme, an interference signal and a desired signal are transmitted through the same resource, and signaling and channel estimation information for decoding or detecting the interference signal are provided from a network.

The IASD scheme has the advantage of being able to be implemented with relatively low complexity by preventing simultaneous decoding of relatively high complexity. However, due to this, the performance of the IASD scheme is greatly different from the Shannon limit known as the theoretical maximum information data rate.

Accordingly, there is a need for a technique for preventing the reception performance of the cell boundary terminals from being deteriorated due to interference from the adjacent cell in the cellular wireless communication system and for reaching the theoretical maximum performance of the physical layer in such an interference environment.

On the other hand, the above information is only presented as background information to help understand the present invention. No determination has been made as to whether any of the above content is applicable as prior art to the present invention, nor is any claim made.

One embodiment of the present invention proposes an apparatus and method for transmitting and receiving signals in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for increasing the efficiency of signal transmission and reception by efficiently combining the SWSC MIMO scheme in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes a signal transmitting and receiving apparatus and method for increasing the throughput of UEs located in the cell boundary region in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes a signal transmitting and receiving apparatus and method for preventing deterioration in performance due to interference from a neighbor cell in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving signals that reduce complexity in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes a signal transmitting and receiving apparatus and method for increasing spectral efficiency in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving a signal based on an achievable data region in a wireless communication system using an SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving a signal by adaptively applying a modulation scheme in a wireless communication system using an SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving a signal by adaptively applying a mapping scheme in a wireless communication system using an SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving a signal by adaptively applying a superposition scheme in a wireless communication system using an SWSC MIMO scheme.

A method according to an embodiment of the present invention comprises: A method of operating a transmitting apparatus in a wireless communication system, the method comprising: detecting an achievable rate region for a receiving apparatus; determining a modulation and coding scheme (MCS) corresponding to the achievable rate region; Level and a sliding window superposition coding (SWSC) multi-input multi-output (MIMO) scheme, wherein the achievable rate region is determined based on a difference between the transmission device and the transmission device And a channel matrix between the transmitting apparatus and the receiving apparatus.

Another method according to an embodiment of the present invention comprises: CLAIMS What is claimed is: 1. A method of operating a receiving device in a wireless communication system, the method comprising: receiving a signal from a transmitting device, wherein the signal is modulated and / or modulated corresponding to an achievable rate region for the receiving device; A signal transmitted based on a modulation and coding scheme (MCS) level and a sliding window superposition coding (SWSC), a massive multi-input multi-output (MIMO) region is determined based on a precoding matrix generated based on a channel matrix between each of the transmitting apparatuses and the transmitting apparatuses and the receiving apparatuses.

An apparatus according to an embodiment of the present invention includes: A transmitting apparatus in a wireless communication system, the apparatus comprising: detecting an achievable rate region for a receiving apparatus; detecting a modulation and coding scheme (MCS) level corresponding to the achievable rate region; And a processor for performing an operation of determining a sliding window superposition coding (SWSC) multi-input multi-output (MIMO) scheme, wherein the achievable rate region comprises: And a precoding matrix generated based on a channel matrix between each of the other transmitting apparatuses and the receiving apparatus.

Another apparatus according to an embodiment of the present invention includes: CLAIMS 1. A receiving apparatus in a wireless communication system, comprising: a processor for receiving a signal from a transmitting apparatus, the signal including a modulation and coding scheme corresponding to an achievable rate region for the receiving apparatus, (MCS) level and a sliding window superposition coding (SWSC) multi-input multi-output (MIMO) scheme, And a precoding matrix generated based on a channel matrix between each of the transmitting apparatuses and the transmitting apparatuses other than the transmitting apparatus and the receiving apparatus.

Other aspects, advantages and key features of the present invention will become apparent to those skilled in the art from the following detailed description, which is set forth in the accompanying drawings and which discloses preferred embodiments of the invention.

It may be effective to define definitions for certain words and phrases used throughout this patent document before processing the specific description portions of the present disclosure below: " include " and " Comprise " and its derivatives mean inclusive inclusion; The term " or " is inclusive and means " and / or "; The terms " associated with " and " associated therewith ", as well as their derivatives, are included within, (A) to (A) to (B) to (C) to (C) to (C) Be communicable with, cooperate with, interleave, juxtapose, be proximate to, possibility to communicate with, possibility to communicate with, It means big or is bound to or with, have a property of, etc .; The term " controller " means any device, system, or portion thereof that controls at least one operation, such devices may be hardware, firmware or software, or some combination of at least two of the hardware, Lt; / RTI > It should be noted that the functionality associated with any particular controller may be centralized or distributed, and may be local or remote. Definitions for particular words and phrases are provided throughout this patent document and those skilled in the art will recognize that such definitions are not only conventional, But also to future uses of the phrases.

One embodiment of the present invention has an effect of enabling transmission and reception of signals in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention has an effect that it is possible to increase the efficiency of signal transmission and reception by efficiently combining the SWSC MIMO scheme in a wireless communication system using the SWSC MIMO scheme

In addition, an embodiment of the present invention has an effect of enabling transmission and reception of signals so as to increase the throughput of UEs located in a cell boundary region in a wireless communication system using the SWSC MIMO scheme .

In addition, an embodiment of the present invention has an effect of enabling signals to be transmitted and received so as to prevent deterioration in performance due to interference from adjacent cells in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention has an effect of enabling signals to be transmitted and received so as to reduce complexity in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention has an effect that it is possible to transmit and receive signals so as to increase spectrum efficiency in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention has an effect of enabling transmission and reception of signals based on an achievable data region in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention has an effect of enabling transmission and reception of signals by adaptively applying a modulation scheme in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention has an effect of enabling a signal to be transmitted and received by adaptively applying a mapping scheme in a wireless communication system using an SWSC MIMO scheme.

In addition, an embodiment of the present invention has an effect of enabling transmission and reception of signals by adaptively applying an overlapping scheme in a wireless communication system using the SWSC MIMO scheme.

Further aspects, features and advantages of the present invention as set forth above in connection with certain preferred embodiments thereof will become more apparent from the following description, taken in conjunction with the accompanying drawings, in which:
1 is a diagram schematically illustrating a structure of a wireless communication system according to an embodiment of the present invention;
2 is a diagram schematically illustrating an internal structure of a base station and an internal structure of a UE in a wireless communication system according to an embodiment of the present invention;
3 is a diagram schematically illustrating transmission and reception operations according to the SWSC scheme in a wireless communication system according to an embodiment of the present invention;
4 is a block diagram schematically illustrating a structure of a wireless communication system to which a scenario for controlling interference between adjacent cells in a cellular downlink radio channel using a MIMO scheme based on an SWSC MIMO scheme according to an embodiment of the present invention is applied. One drawing;
5 is a signal flow diagram schematically illustrating a process of operating an SWSC MIMO scheme in a wireless communication system according to an embodiment of the present invention;
6 is a diagram schematically illustrating an example of an internal structure of a signal transmission apparatus to which an SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention;
7 is a diagram schematically illustrating an example of a process in which a signal transmission apparatus transmits a signal when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention;
8 is a diagram schematically illustrating an example of a process of generating a transmission signal by a signal transmission apparatus when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention;
9 is a diagram schematically illustrating a specific operation procedure of a SWSC MIMO scheme considering a block unit in a wireless communication system according to an embodiment of the present invention;
FIG. 10 is a diagram schematically illustrating a specific operation procedure of a SWSC MIMO scheme considering a symbol unit in a wireless communication system according to an embodiment of the present invention; FIG.
11 is a diagram schematically illustrating an example of a difference between a structure of a signal transmission apparatus of a general LTE mobile communication system and a structure of a signal transmission apparatus of a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention ;
FIG. 12 is a diagram schematically illustrating an exemplary operation procedure of an SWSC MIMO scheme when one stream is transmitted in a wireless communication system according to an embodiment of the present invention; FIG.
13 is a diagram schematically showing another example of a specific operation procedure of the SWSC MIMO scheme when one stream is transmitted in the wireless communication system according to an embodiment of the present invention;
FIG. 14 is a diagram schematically illustrating an exemplary operation procedure of an SWSC MIMO scheme when two streams are transmitted in a wireless communication system according to an embodiment of the present invention; FIG.
15 is a view schematically showing another example of a specific operation procedure for an SWSC MIMO scheme when two streams are transmitted in a wireless communication system according to an embodiment of the present invention;
16 is a diagram schematically illustrating another example of a structure of a signal transmitting apparatus of a general LTE mobile communication system and a difference of a structure of a signal transmitting apparatus of a wireless communication system using an SWSC SISO scheme according to an embodiment of the present invention ;
17 is a diagram schematically illustrating a superposition coding list of a signal transmission apparatus in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention;
18 is a diagram schematically illustrating an example of an achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention;
19 is a diagram schematically showing another example of an achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention;
20 is a diagram schematically illustrating another example of an achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention;
21 is a diagram schematically showing another example of the internal structure of a signal transmission apparatus to which a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention;
22 is a diagram schematically illustrating another example of the internal structure of a signal transmission apparatus to which a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention;
23 is a diagram schematically illustrating constellation of a 16-QAM scheme in a wireless communication system according to an embodiment of the present invention;
24A and 24B are views schematically showing an example of a mapping method when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention;
25A to 25D are diagrams schematically showing another example of a mapping method when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention;
26 is a diagram schematically illustrating another example of a mapping scheme when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention;
FIG. 27 is a diagram schematically illustrating another example of a mapping scheme when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention; FIG.
28 is a diagram schematically illustrating an example of the internal structure of a signal receiving apparatus in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention;
29 is a diagram schematically illustrating an example of an internal structure of a UE in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention;
30 is a view schematically showing another example of the internal structure of a UE in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention;
31 is a diagram schematically illustrating another example of the internal structure of a base station in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention.
Throughout the drawings, it should be noted that like reference numerals are used to illustrate the same or similar elements and features and structures.

The following detailed description, which refers to the accompanying drawings, will serve to provide a comprehensive understanding of the various embodiments of the present disclosure, which are defined by the claims and the equivalents of the claims. The following detailed description includes various specific details for the sake of understanding, but will be considered as exemplary only. Accordingly, those skilled in the art will recognize that various changes and modifications of the various embodiments described herein may be made without departing from the scope and spirit of this disclosure. Furthermore, the descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

The terms and words used in the following detailed description and in the claims are not intended to be limited to the literal sense, but merely to enable a clear and consistent understanding of the disclosure by the inventor. Thus, it will be apparent to those skilled in the art that the following detailed description of various embodiments of the disclosure is provided for illustrative purposes only, and that the present disclosure, as defined by the appended claims and equivalents of the claims, It should be clear that this is not provided for the sake of clarity.

It is also to be understood that the singular forms "a" and "an" above, which do not expressly state otherwise in this specification, include plural representations. Thus, in one example, a " component surface " includes one or more component representations.

Also, terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the contextual meaning of the related art.

According to various embodiments of the invention, the electronic device may comprise a communication function. For example, the electronic device may be a smart phone, a tablet personal computer (PC), a mobile phone, a videophone, an e-book reader e a notebook PC, a netbook PC, a personal digital assistant (PDA), a portable personal computer (PC) A mobile multimedia device, a portable multimedia player (PMP), an MP3 player, a mobile medical device, a camera, a wearable device (e.g., a head- Electronic devices such as a head-mounted device (HMD), an electronic apparel, an electronic bracelet, an electronic necklace, an electronic app apparel, an electronic tattoo, or a smart watch ) And the like.

According to various embodiments of the present invention, the electronic device may be a smart home appliance having communication capabilities. For example, the smart home appliance includes a television, a digital video disk (DVD) player, audio, a refrigerator, an air conditioner, a vacuum cleaner, an oven, A microwave oven, a washer, a dryer, an air purifier, a set-top box, a TV box (for example, Samsung HomeSync ^™ , Apple TV ^™ or Google TV ^™ ) a gaming console, an electronic dictionary, a camcorder, an electrophotographic frame, and the like.

According to various embodiments of the present invention, the electronic device may be a medical device (e.g., magnetic resonance angiography (MRA) device, magnetic resonance imaging (CT) device, an imaging device, or an ultrasonic device), a navigation device, and a magnetic resonance imaging (MRI) , A global positioning system (GPS) receiver, an event data recorder (EDR), a flight data recorder a recorder: FDR (hereinafter referred to as FER), an automotive infotainment device, a navigation electronic device (for example, a navigation navigation device, A gyroscope, or a compass), an avionics device, a secure device, an industrial or consumer robot, and the like.

In accordance with various embodiments of the present invention, an electronic device includes a plurality of devices, including furniture, a portion of a building / structure, an electronic board, an electronic signature receiving device, a projector and various measurement devices (e.g., Water, electricity, gas or electromagnetic wave measuring devices), and the like.

According to various embodiments of the invention, the electronic device may be a combination of devices as described above. It should also be apparent to those skilled in the art that the electronic device according to the preferred embodiments of the present invention is not limited to the device as described above.

According to various embodiments of the present invention, the signal receiving apparatus may be, for example, a user equipment (UE), and the signal transmitting apparatus may be, for example, a base station. Here, the UE may be intermingled with terms such as a mobile station (MS), a wireless terminal, a mobile device, and the like. Herein, the base station includes a node B, an evolved Node B (eNB), an evolved universal terrestrial radio access network (EBS) UTRAN Node B (eNB) (hereinafter referred to as "eNB "), and the like.

One embodiment of the present invention is a sliding window superposition coding (SWSC) multi-input multi-output (MIMO) ) System and a method for transmitting and receiving signals in a wireless communication system using the method. Here, the SWSC MIMO scheme is a scheme in which the SWSC scheme and the MIMO scheme are combined according to an embodiment of the present invention.

In addition, an embodiment of the present invention proposes an apparatus and method for increasing the efficiency of signal transmission and reception by efficiently combining the SWSC MIMO scheme in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes a signal transmitting and receiving apparatus and method for increasing the throughput of UEs located in the cell boundary region in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes a signal transmitting and receiving apparatus and method for preventing deterioration in performance due to interference from a neighbor cell in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving signals that reduce complexity in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes a signal transmitting and receiving apparatus and method for increasing spectral efficiency in a wireless communication system using the SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving a signal based on an achievable data region in a wireless communication system using an SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving a signal by adaptively applying a modulation scheme in a wireless communication system using an SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving a signal by adaptively applying a mapping scheme in a wireless communication system using an SWSC MIMO scheme.

In addition, an embodiment of the present invention proposes an apparatus and method for transmitting and receiving a signal by adaptively applying a superposition scheme in a wireless communication system using an SWSC MIMO scheme.

Meanwhile, an apparatus and method proposed in an embodiment of the present invention can be applied to a long-term evolution (LTE) mobile communication system, a long-term evolution (LTE) (LTE-A) mobile communication system and a licensed-assisted access (LAA) -LTE mobile communication system, , A high speed downlink packet access (HSDPA) mobile communication system, and a high speed uplink packet access (HSUPA) Speed packet data (hereinafter referred to as " HRPD ") of a 3rd generation partnership project 2 (3GPP2, hereinafter referred to as "3GPP2 & The mobile communication system and the 3GPP2 (WCDMA) mobile communication system and a 3GPP2 code division multiple access (CDMA) mobile communication system (hereinafter, referred to as "WCDMA " ) Mobile communication system, an IEEE 802.16m communication system, an IEEE 802.16e communication system, an evolved packet system (IEEE 802.16e communication system), an Institute of Electrical and Electronics Engineers system (hereinafter referred to as " EPS "), a mobile internet protocol (hereinafter referred to as" Mobile IP ") system, a digital multimedia broadcasting Service, a digital video broadcasting-handheld (DVP-H, hereinafter referred to as "DVP-H"), and a mobile / A mobile broadcasting service such as an advanced television systems committee-mobile / handheld (ATSC-M / H) service and an internet protocol television (IPTV) Various communication systems such as a digital video broadcasting system such as an IPTV service and a moving picture experts group (MPEG) media transport (MMT) system, Lt; / RTI >

First, the structure of a wireless communication system according to an embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a schematic diagram illustrating a structure of a wireless communication system according to an embodiment of the present invention. Referring to FIG.

1, a wireless communication system 100 includes one or more base stations 104a, 104b that can transmit, receive, and exchange wireless signals with one or more UEs 104a, 104b located within a cell or sector 102, 102a. Each of the base stations 102 and 102a includes a transmit chain and a receive chain, each of which comprises a plurality of components associated with signal transmission and reception, for example, a processor, a modulator, A multiplexer, a demodulator, a demultiplexer, antennas, and the like. Here, each of the transmission chain and the reception chain may be implemented as one chipset or a processor.

Each of the UEs 104a and 104b may be, for example, a cellular phone, a smart phone, a laptop computer, a portable communication device, a portable computing device, a satellite radio, a global positioning system a personal digital assistant (PDA), and / or other wireless communication devices.

The base station 102 may simultaneously communicate with two UEs 104a and 104b via one or more subcarriers or carrier components. The base station 102 is configured to support various types of UEs, such as nearby UEs (not separately shown in FIG. 1) or UEs 104a and 104b located in a cell boundary region. The UEs 104a and 104b located in the cell boundary region may transmit a signal transmitted by the base station 102a of the neighboring cell to the interference signal As shown in FIG. Similarly, if a signal transmitted from the base station 120 to the UE 104a, i.e., a desired signal of the UE 104a acts as an interference signal to the UE 104b, A signal transmitted to the UE 104b, i.e., a desired signal of the UE 104b may act as an interference signal to the UE 104a.

FIG. 1 illustrates a structure of a wireless communication system according to an embodiment of the present invention. Referring to FIG. 2, an internal structure of a base station and an internal structure of a UE in a wireless communication system according to an exemplary embodiment of the present invention Will be described.

2 is a diagram schematically illustrating an internal structure of a base station and an internal structure of a UE in a wireless communication system according to an embodiment of the present invention.

2, the base station 102 includes a transceiver 212 capable of communicating a radio signal with one or more UEs, for example, the UEs 104a and 104b via antennas, 212, and, if necessary, a processor 210 that communicates with another base station, e.g., base station 102a, via a backhaul. The UEs 104a and 104b may further include transceivers 220 and 230 capable of communicating radio signals with the base station 102 via antennas and processors 222 and 232 for controlling communication by the transceivers 220 and 230 .

The transmitting and receiving units 212, 220 and 230 include communication circuits such as a radio frequency (RF) processor and a modulator / demodulator (MODEM) And the MODEM may include a transmission element such as an encoder, a modulator and a multiplexer, a demultiplexer, a demodulator, a decoder, and the like Receive elements.

When the UEs 104a and 104b are located in a cell boundary area where they can receive interference signals from neighboring cells, the UEs 104a and 104b may be selected as a user pair for superposition coding have. The base station 102 codes and simultaneously transmits messages for the UEs 104a and 104b selected by the user pair according to the superposition coding scheme, and the UEs 104a and 104b separate the desired signal and the interference signal It can be recovered.

In the meantime, the embodiments described below can be applied to the case where cell boundary UEs whose performance deteriorates due to interference signals from the neighboring cell (s) in the cellular environment exist in the cellular environment, in order to reach the theoretical performance limit in the physical layer. Are operating embodiments. The system to which the SWSC scheme is applied may include one or more transmitters and one or more receivers and may provide better performance for two or more transmitters and two or more receivers.

Each transmitter transmits messages to be transmitted on the basis of a superposition coding scheme during a transmission period including a predetermined transmission period, for example, b blocks, where one identical message is transmitted during a predetermined number of consecutive blocks Are superimposed and transmitted. Here, the block represents a unit resource, for example, a unit time resource or a unit frequency resource, for example. Each receiver can recover a desired message by performing a decoding procedure on signals received overlaid during the set number of consecutive blocks.

2, an internal structure of a base station and an internal structure of a UE in a wireless communication system according to an embodiment of the present invention are described. Next, referring to FIG. 3, in a wireless communication system according to an exemplary embodiment of the present invention, Transmission and reception operations according to the present invention will be described.

3 is a diagram schematically illustrating transmission and reception operations according to the SWSC scheme in a wireless communication system according to an embodiment of the present invention.

3, transmission and reception operations according to the SWSC scheme are described as an example in which two transmitters and two receivers perform transmission and reception operations according to the SWSC scheme, It is needless to say that there are no limitations on the number of transmitters and the number of receivers performing transmit and receive operations based on the scheme. Here, the number of transmitters and the number of receivers performing transmission and reception operations based on the SWSC scheme may vary according to the coordination of the network. In FIG. 3, it is assumed that the same message is transmitted through two blocks, and the size of the window is 2. FIG. Here, the size of the window represents the number of blocks included in the window, and the block represents data, for example, a unit resource to which a message is transmitted. Here, the unit resource may be a unit time resource or a unit frequency resource.

3, the first two transmitters S1 (310), S2 (315 ) is, and it is assumed the signal to be transmitted la, respectively X _1, X _2, the two receivers R1 (320), R2 (325 ) Are assumed to be Y ₁ and Y ₂ , respectively. For each block, the transmitter S1 includes a message for the message two codes, one example of coding according to the superposition coding scheme due to code U as the code V to generate a signal X ₁ and the transmitter S2 will be transmitted is to be transmitted generates a signal X _2, which. Here, each message to be transmitted may be at least one packet or a protocol data unit (PDU), for example. In addition, each of the code U and the code V may be, for example, a turbo code. In addition, although FIG. 3 illustrates an example in which a message to be transmitted is coded using two codes, it is needless to say that the message may be coded using one code and then divided into two.

3 illustrates a case where a message to be transmitted is transmitted through two blocks, and thus the message is coded using two codes. However, the number of blocks to which the message is transmitted is It goes without saying that there is no limitation. Here, if the number of blocks to which the message is transmitted is b, the message to be transmitted may be coded using b-1 codes or may be coded using one code and then divided into b-1.

Specifically, in block 1, the transmitter S1 sends a known message (shown as "1" for convenience) to both the transmitter S1 and receivers based on the code U, (1) and generates a code word U (1) by coding the message m ₁₁ to be transmitted in the block 1 on the basis of the code V, transmitting the cost codeword X ₁ (1) generated by superposition coding from the encoder in the following stage (modulators, multiplexers, etc.) by the output, the signal that the block 1 for a receiver comprising the codeword X ₁ (1) . In addition, so that the signal that includes the transmitter by S2 is output to the next stage from the codeword X ₂ (1) The encoder ₂₁ comprises a message m to be sent message m transmitted to the receivers ₂₁ in the first block.

Further, the block 2 (block 2) in the transmitter S1 is the the message m ₁₁ previously transmitted by coding the code U based on generating a code word U (2), and the message to be transmitted in the block 2 m ₂₂ (2), and transmits the generated codeword X ₁ (2) by superposition coding U (2) and V (2). In block 2, the transmitter S 2 transmits a codeword X ₂ (2) containing a message m ₂₂ to be transmitted to receivers.

In this way, messages are transmitted during (b-1) blocks, and in the last block block b, the transmitter S1 transmits previously transmitted messages m _{1, b -1} to (B) by coding the known message "1" based on the code V to generate a codeword V (b), and superposing coding U (b) And transmits the generated code word X ₁ (b). In block b, the transmitter S2 transmits a codeword X ₂ (b) containing a message m _2b to be transmitted.

Wherein the two codes, that is, overlapping a code U as the code V, was the transmission signal of the transmitter S1 an example produced by the X ₁ = f (U, V), each receiver overlap for the two blocks And can perform a sliding window decoding operation using the received signals. That is, the receiver R1 cancels the codeword U (1) using the known message "1 " based on the received signals Y ₁ (1) and Y ₁ 1 is assumed by the noise, and detects the interference of X ₂ (1) to the receiver R1.

Next, the receiver R1 is and eliminate the U (1) using, known message "1" from the received signal and removes the detected signal _{X 2 (1), V (} 2) and X ₂ ( 2) as a noise, thereby detecting a desired signal [V (1) U (2)]. The message m ₁₁ can be recovered from the detected signal.

Similarly, when the received signal Y ₁ (3) of block 3 arrives, the receiver R 1 uses the previously detected codeword U (2) instead of the known message "1 & by repeating the similar operation can recover the desired message ₁₂ m. That is, since the codeword U (2) has already been detected in the block 2, U (2) in the block 3 operates as a known message.

Likewise, in subsequent blocks, the receiver Rl may detect the desired messages. When the received signal Y ₁ (b) arrives at the block b which is the last block, the receiver R 1 removes U (b-1) using the previously detected codeword U (b- by removing the V (b) to detect the desired signal by using the [V (b-1) U (b)] to recover the message m _{1, b -1.}

The receiver R2 detects the desired signal of the receiver 1 in an analogous manner to the receiver R1 and detects the desired signal of the receiver R2 by removing the detected interference signal from the received signals.

로 표시하였음). 다음 단계에서 상기 수신기 2는 수신 신호들로부터 알려진 메시지 "1"을 사용하여 상기 메시지 m₁₁을 사용하여 이전 블록에서 검출된 V(1)을 제거한 뒤, X₂(1)을 검출하여 메시지 m₂₁을 복원한다. Specifically, the receiver R2 removes the codeword U (1) using the known message "1" when the received signals Y ₂ (1) and Y ₂ and, X ₂ (1) and V (2) and X _{2 (2)} to a by regarding the noise, the detection of the [V (1) U (2 )] the interference signal on the receiver R2 to restore the message m ₁₁ and (for convenience, the restored message is ₁₁ m in FIG. 3

Respectively. In the next step, the receiver 2 is received after the from the signal using a known message "1" to remove the V (1) detected in the previous block using the message m _11, detects the X ₂ (1) message m ₂₁ .

Likewise, in subsequent blocks, the receiver R2 can detect the desired messages. When the received signal Y ₁ (b) arrives at block b which is the last block, the receiver R2 performs a decoding operation on the received signals of the last two blocks using the previously detected codeword V (b) .

In order to operate the SWSC scheme in a cellular environment, one of the transmitters 102 and 102a or a separate network entity (not shown) may operate as a coordinator. The coordinator performs a co-scheduling operation between base stations, selects a user pair to which a superposition coding scheme is to be applied in consideration of a capacity region, Signaling information, and can control the feedback operation and the retransmission operation for the SWSC transmission.

Meanwhile, the above-described SWSC scheme considers the case where one antenna is used, that is, a single input single output (SISO) scheme is used. Therefore, in an embodiment of the present invention, when a plurality of antennas are used, that is, when a MIMO scheme is used, a scheme of transmitting and receiving signals by efficiently combining the MIMO scheme and the SWSC scheme is proposed.

In an embodiment of the present invention, a structure of a sliding-window superposition coding layer (hereinafter referred to as " sliding-window superposition coding layer ") in a multi- The SWSC MIMO scheme is an achievable rate region (hereinafter referred to as "achievable rate region") that can be achieved when a SWSC scheme is applied to a wireless communication system using a MIMO scheme. (Hereinafter, referred to as " QoS "), and it is possible to perform an adaptive operation as a new component in a variety of service quality (QoS) The spectral efficiency can be significantly increased.

Hereinafter, the SWSC MIMO scheme according to an embodiment of the present invention will be described in detail.

First, an embodiment of the present invention proposes a SWSC MIMO scheme capable of acquiring all achievable rate regions when a SWSC scheme is applied to a multi-antenna network, that is, a wireless communication system using a MIMO scheme. And the like.

(1) a transmitter design including an SWSC superposition layer determined by a combination of streams for each beam and a quadrature amplitude modulation (QAM) modulation layer; system

(2) Transmitter design method that performs transmission operation by selecting SWSC MIMO scheme adaptively based on achievable rate region of SWSC MIMO scheme

(3) Method of operating SWSC MIMO system in cellular environment

Second, an embodiment of the present invention proposes an SWSC scheme based on a QAM scheme when the SWSC MIMO scheme as described above is applied to SISO. Particularly, in an embodiment of the present invention, a QAM-SWSC transmitter design method based on the number of sliding-window superposition coding layers, superposition coding type, and constellation (hereinafter referred to as "constellation" I suggest.

Referring to FIG. 4, a structure of a wireless communication system to which a scenario for controlling interference between adjacent cells in a cellular downlink radio channel using a MIMO scheme based on an SWSC MIMO scheme according to an embodiment of the present invention is applied Will be described.

4 is a block diagram schematically illustrating a structure of a wireless communication system to which a scenario for controlling interference between adjacent cells in a cellular downlink radio channel using a MIMO scheme based on an SWSC MIMO scheme according to an embodiment of the present invention is applied. Fig.

4, the wireless communication system includes a cell 411 managed by a plurality of cells, for example, a base station 410, and a cell 421 managed by the base station 420. A backhaul connection is established between the base station 410 and the base station 420. The UE 430 and the UE 440 exist in the boundary region between the cell 411 and the cell 421, respectively.

The desired signal transmitted by the base station 410 to the UE 430 acts as an interference signal to the UE 440. In addition, a desired signal transmitted from the BS 420 to the UE 440 acts as an interference signal to the UE 430.

4 illustrates a structure of a wireless communication system to which a scenario for controlling interference between adjacent cells in a cellular downlink radio channel using a MIMO scheme based on an SWSC MIMO scheme according to an embodiment of the present invention is applied And a method of operating the SWSC MIMO scheme in a wireless communication system according to an embodiment of the present invention will be described with reference to FIG.

5 is a signal flow diagram schematically illustrating a process of operating a SWSC MIMO scheme in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 5, the UE 500 transmits a feedback message to the base station 510 to which the UE 500 belongs (step 511). Here, the feedback message is transmitted when a specific event occurs or periodically. The feedback message includes a channel quality indicator (CQI), channel state information (CSI), a precoding matrix indicator a precoding matrix indicator (PMI), QoS, and the like. Herein, the CQI is a received signal strength indicator (RSSI) of the received signal, a received signal code power (RSCP) A reference signal received power (RSRP), a reference signal received quality (RSRQ, hereinafter referred to as " RSRQ "), A carrier-to-interference noise ratio (CINR), a signal-to-noise ratio (SNR) And may be generated based on various parameters such as a block error rate (BLER).

In step 513, the base station 510 receives the feedback message from the UE 500, and in cooperation with other base stations, detects the achievable rate regions that the SWSC MIMO scheme can provide. The base station 510 may be connected to the base station 510 through a backhaul, and the base station 510 may be connected to the SWSC MIMO scheme 510 under control of a centralized unit that manages the base station 510 and other base stations. Can achieve achievable rate regions.

In consideration of the QoS of the UE 500, the Node B 510 allocates resources to the UEs so that the UE 500 receives the service through the largest achievable rate region, and performs modulation and coding (MCS) level and a SWSC MIMO scheme in step 515, as shown in FIG. (2) a QAM combination according to the structure of a sliding-window superposition coding layer; (3) a modulation layer (hereinafter referred to as a "modulation layer" (4) a beamforming matrix for transmitting an SWSC superposition layer signal, and (4) a beamforming matrix for transmitting an SWSC superposition layer signal.

Then, in step 517, the base station 510 signals the MCS level and the SWSC MIMO scheme determined for the UE 500 to the UE 500 in step 517. In step 519, the BS 510 transmits a desired signal to the UE 500 based on the determined SWSC MIMO scheme. 5, the base station 510 may include a plurality of base stations for providing cooperative communication. Accordingly, the base station 510 may include a plurality of base stations 510 A desired signal to be transmitted to other UEs not targeting the UE 500 is received by the UE 500 as an interference signal to the UE 500 in step 521.

When the desired signal and the interference signal are simultaneously received based on the MCS level received from the base station 510 and the information related to the MCS scheme of the SWSC through the message, the UE 500 transmits, in a similar manner to the SWSC SISO scheme, The decoding operation is performed based on an adaptive decoding or an iterative soft decoding method using the transmission structure of the first embodiment and thus the desired signal is restored in step 523.

5, a description has been given of a process of operating a SWSC MIMO scheme in a wireless communication system according to an embodiment of the present invention. Next, referring to FIG. 6, in a wireless communication system according to an embodiment of the present invention, An example of the internal structure of the applied signal transmitting apparatus will be described.

6 is a diagram schematically illustrating an example of an internal structure of a signal transmission apparatus to which a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 6, firstly, the controller 610 may generate a desired achievable rate region based on the CQI, the CSI, the PMI, the QoS, and the number of antennas included in the feedback message received from the UE A number of streams and a structure of a sliding-window superposition coding layer 620, a QAM combination 630 according to the number of streams and a sliding-window superposition coding layer structure, a QAM modulation layer structure 640, And a beamforming matrix 650 for transmitting the beamforming matrix 650. Here, in order to make it possible to generate a desired achievable rate region based on the CQI, the CSI, the PMI, the QoS, and the number of antennas included in the signaling device, for example, the feedback message received from the UE, The number of streams, the number of streams, the combination of QAM according to the structure of the sliding-window superposition coding layer, the structure of the QAM modulation layer, and the operation of determining the beamforming matrix carrying each SWSC superposition layer The detailed description will be omitted here.

As shown in FIG. 6, the controller 610 can generate a desired achievable rate region based on the CQI, the CSI, the PMI, the QoS, and the number of antennas included in the feedback message received from the UE And determines to use two sliding-window superposition coding layer structures for one of the two streams, and for the remaining one of the two streams, Window superposition coding layer structures.

Thus, one of the two streams, i.e., one of the two codewords, is input to a scrambler 621-1, which scrambles the codeword into a predetermined scrambling scheme Scrambled to generate a scrambled signal, and the scrambled signal includes two subscript-blended signals. One of the two sub-scrambled signals is output to a modulation mapper 631-1. The modulation mapper 631-1 outputs the sub-scrambled signal according to a predetermined modulation scheme Modulated to generate a modulated signal, and outputs the modulated signal to a layer mapper 641-1. The layer mapper 641-1 performs a hierarchical mapping operation corresponding to a hierarchical mapping method preset for the modulated signal output from the modulation mapper 631-1 to generate a hierarchical mapped signal, And outputs it to a precoder 651-1. The precoder 651-1 precodes the layer mapped signal output from the layer mapper 641-1 based on a predetermined precoding scheme to generate a precoded signal And outputs it to the adder 653.

Meanwhile, the remaining one of the two subscrambled signals is output to the buffer 623-1. The buffer 623-1 buffers the sub-scrambled signal output from the scrambler 621-1 for a preset time, and outputs the buffered sub-scrambled signal to the modulation mapper 631- 2). The modulation mapper 631-2 modulates the sub-scrambled signal output from the buffer 623-1 according to a predetermined modulation scheme to generate a modulated signal, and then outputs the modulated signal to the hierarchy mapper 641-2 Output. The hierarchical mapper 641-2 performs a hierarchical mapping operation corresponding to a hierarchical mapping method preset for the modulated signal output from the modulation mapper 631-2 to generate a hierarchical mapped signal, And outputs it to the coder 651-2. The precoder 651-2 precodes the layer mapped signal output from the layer mapper 641-2 based on a predetermined precoding scheme to generate a precoded signal And outputs it to the adder 653.

The other two codewords are input to a scrambler 621-2. The scrambler 621-2 scrambles the codeword based on a predetermined scrambling scheme Scrambled to produce a scrambled signal, which includes three subscripted signals. One of the three sub-scrambled signals is output to a modulation mapper 631-3. The modulation mapper 631-3 modulates the sub-scrambled signal according to a predetermined modulation scheme, And outputs it to the layer mapper 641-3. The layer mapper 641-3 performs a hierarchical mapping operation corresponding to a hierarchical mapping method preset for the modulated signal output from the modulation mapper 631-3 to generate a layer mapped signal, And outputs it to the coder 651-3. The precoder 651-3 performs a precoding operation on the hierarchically mapped signal output from the hierarchy mapper 641-3 based on a predetermined precoding scheme to generate a precoded signal And outputs it to the adder 653.

Meanwhile, the remaining two subscrambled signals of the three subscrambled signals are output to the buffer 623-2. The buffer 623-2 buffers the two subscrambled signals output from the scrambler 621-2 for a predetermined time, and outputs the buffered two subscrambled signals at a time And outputs it to the modulation mapper 631-4 and the modulation mapper 631-5.

The modulation mapper 631-4 modulates the sub-scrambled signal output from the buffer 623-2 according to a predetermined modulation scheme to generate a modulated signal, and outputs the modulated signal to the hierarchy mapper 641-4 Output. The layer mapper 641-4 performs a hierarchical mapping operation corresponding to a hierarchical mapping method preset for the modulated signal output from the modulation mapper 631-4 to generate a hierarchical mapped signal, And outputs it to the coder 651-4. The precoder 651-4 performs a precoding operation on the layer mapped signal output from the layer mapper 641-4 based on a predetermined precoding scheme to generate a precoded signal And outputs it to the adder 653.

The modulation mapper 631-5 modulates the subscrambled signal output from the buffer 623-2 according to a predetermined modulation scheme to generate a modulated signal, and outputs the modulated signal to the hierarchy mappers 641-5 . The layer mapper 641-5 performs a hierarchical mapping operation corresponding to a hierarchical mapping method preset for the modulated signal output from the modulation mapper 631-5 to generate a layer mapped signal, And outputs it to the coder 651-5. The precoder 651-5 performs a precoding operation on the hierarchically mapped signal output from the hierarchy mapper 641-5 on the basis of a predetermined precoding scheme to generate a precoded signal And outputs it to the adder 653.

The adder receives the output from the precoder 651-1, the precoder 651-2, the precoder 651-3, the precoder 651-4, and the precoder 651-5 And outputs the pre-coded signal to the antenna ports 661 after adding the precoded signal. The antenna ports 611 transmit signals output from the adder 653 through air.

6, the signal transmission apparatus includes the controller 610, the scrambler 621-1, the scrambler 621-2, the buffer 623-1, the buffer 623-2, The modulation mapper 631-1, the modulation mapper 631-2, the modulation mapper 631-3, the modulation mapper 631-4, the modulation mapper 631-5, the hierarchy mapper 641-1 A hierarchy mapper 641-2, a hierarchy mapper 641-3, a hierarchy mapper 641-4, a hierarchy mapper 641-5, that is, a precoder 651-1, The coder 651-2, the precoder 651-3, the precoder 651-4, the precoder 651-5, the adder 653 and the antenna ports 661 The signal transmitting apparatus includes the controller 610, the scrambler 621-1, the scrambler 621-2, the buffer 623-1, the buffer 622-1, The modulation mapper 631-1, the modulation mapper 631-2, the modulation mapper 631-3, the modulation mapper 631-4, the modulation mapper 631-5, A hierarchy mapper 641-1, a hierarchy mapper 641-2, A hierarchy mapper 641-4, a hierarchy mapper 641-5, that is, a precoder 651-1, a precoder 651-2, a precoder 651-3 It is needless to say that at least two of the pre-coder 651-4, the precoder 651-5, the adder 653, and the antenna ports 661 may be integrated.

In addition, the signal transmitting apparatus may be implemented by a single processor.

6 illustrates an example of an internal structure of a signal transmission apparatus to which a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention. Referring to FIG. 7, An example of a process in which a signal transmission apparatus transmits a signal when a SWSC MIMO scheme is applied in a wireless communication system will be described.

FIG. 7 is a diagram schematically illustrating an example of a process of a signal transmission apparatus transmitting a signal when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 7, in the signal transmission apparatus shown in FIG. 7, a signal transmission apparatus transmits two streams, and a sliding-window superposition coding layer It should be noted that the number of sliding-window superposition coding layers is set to three for the remaining one of the two streams and that the signal transmission process is performed when two antennas are used.

As shown in FIG. 7, the signal transmission apparatus applies one of two streams, for example, two sliding-window superposition coding layers, e.g., layer 1 and layer 2 for stream 1, For example, for the stream 2, three sliding-window superposition coding layers, for example, layer 1, layer 2 and layer 3, are applied.

7, m _ij denotes a message to be transmitted by the signal transmitting apparatus i in a block j, U denotes a code U used in the SWSC transmission scheme, V denotes a code used in the SWSC transmission scheme V, X _i denotes a signal transmitted by the signal transmitting device i, X _i (j) denotes a signal transmitted by the signal transmitting device i in the block j, X _ij denotes a signal transmitting device i, j, and T _ij denotes a precoding matrix for the SWSC layer j used by the signal transmission apparatus i.

In Fig. 7, the vertical oval represents a SWSC superposition layer coded based on code U or code V, and a diagonal ellipse indicates that the same message is transmitted through two blocks.

As a result, the signal transmitting apparatus transmits a signal as shown in Equation (1).

&Quot; (1) "

FIG. 7 illustrates an example of a signal transmission apparatus transmitting a signal when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention. Referring to FIG. 8, An example of a process of generating a transmission signal by a signal transmission apparatus when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment will be described.

8 is a diagram schematically illustrating an example of a process of generating a transmission signal by a signal transmission apparatus when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 8, when a SWSC MIMO scheme according to an embodiment of the present invention is applied, a signal transmission apparatus transmits an SWSC superposition layer signal for each beam. Then, the signal receiving apparatus can calculate a joint maximum likelihood (ML) detection method or a linear minimum mean square error (ML) detection method as in the SWSC SISO method according to an embodiment of the present invention a symbol-level detection operation is performed based on a linear detection method such as a linear minimum mean squared error (LMMSE) detection method, and a step-superposition coding transmission structure An adaptive decoding operation or an iterative soft decoding operation is performed to restore a desired signal.

In FIG. 8, T ₁ and T ₂ denote a beamforming matrix for transmitting an SWSC superposition layer signal, and V and U are pulse amplitude modulation (PAM) ) / SWSC superposition layer signal of QAM configuration.

8 illustrates an example of a process of generating a transmission signal by a signal transmission apparatus when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention. the SWSC MIMO scheme according to an embodiment of the present invention needs a specific operation scheme considering the symbol unit and the block unit in order to ensure the higher spectral efficiency while satisfying the required QoS considering the rate region.

&Quot; (2) "

A specific operation method of the SWSC MIMO scheme considering the symbol unit and the block unit will be described as follows.

First, a concrete operation method of the SWSC MIMO scheme considering block units will be described. Referring to FIG. 9, the operation method will be described below.

FIG. 9 is a diagram schematically illustrating a specific operation procedure of a SWSC MIMO scheme considering a block unit in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 9, it is assumed that a SWSC MIMO scheme considering a block unit shown in FIG. 9 is performed in a case where a single stream is transmitted and two SWSC superposition layers are configured for the single stream It should be noted that it is a concrete operation process for the SWSC MIMO scheme considering the block unit. If a plurality of streams other than a single stream are transmitted, the signal transmission apparatus can generate a transmission signal as described with reference to FIG.

In Fig. 9, the vertical oval represents a SWSC superposition layer coded based on code U or code V, and a diagonal ellipse indicates that the same message m is transmitted during two blocks. In FIG. 9, T ₁ and T ₂ denote a beamforming matrix for transmitting an SWSC superposition layer signal, respectively.

In FIG. 9, since one block includes a plurality of symbols, a detailed operation procedure of the SWSC MIMO scheme considering the block unit as shown in FIG. 9 is the same as that shown in FIG. 10, The MIMO scheme can be supported by a specific operation procedure of the SWSC MIMO scheme considering the following considerations.

10 is a diagram schematically illustrating a specific operation procedure of a SWSC MIMO scheme considering symbol units in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 10, it is assumed that a SWSC MIMO scheme considering a symbol unit shown in FIG. 10 is performed in a case where a single stream is transmitted and two SWSC superposition layers are configured for the single stream It should be noted that it is a concrete operation process for the SWSC MIMO scheme considering the symbol unit. If a plurality of streams other than a single stream are transmitted, the signal transmission apparatus can generate a transmission signal as described with reference to FIG.

If the signal transmission apparatus determines the number of SWSC superposition layers, for example, if the signal transmission apparatus determines that the number of SWSC superposition layers is two in FIG. 10, the QAM combination according to the structure of the two SWSC superposition layers Select. Here, the signal transmission apparatus may select a combination of 16-QAM + 16-QAM according to a desired achievable rate region, or a combination of 64-QAM + quadrature phase shift keying (QPSK). The signal transmitting device then completes the modulation mapping operation by dividing the selected QAM combination into smaller modulation layers.

10, a specific operation of the SWSC MIMO scheme considering a symbol unit in a wireless communication system according to an embodiment of the present invention is described. Next, referring to FIG. 11, a signal transmission apparatus of a general LTE mobile communication system An exemplary structure of a signal transmission apparatus of a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention will be described.

11 is a diagram schematically illustrating an example of a difference between a structure of a signal transmission apparatus of a general LTE mobile communication system and a structure of a signal transmission apparatus of a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention .

11, a signal transmission apparatus 1100 of a general LTE mobile communication system determines only how many transmission layers the QAM symbols are mapped. This will be described in detail as follows.

First, a plurality of codewords, for example, two codewords are input to the scrambler 1111-1 and the scrambler 1111-2, respectively. The scrambler 1111-1 scrambles the input codeword by a predetermined scrambling scheme to generate a scrambled signal, and outputs the scrambled signal to the modulation mapper 1113-1. The modulation mapper 1113-1 modulates the scrambled signal based on a predetermined modulation mapping scheme to generate a modulated signal, and outputs the modulated signal to the hierarchy mapper 1115. [

Also, the scrambler 1111-2 scrambles the input codeword with a predetermined scrambling scheme to generate a scrambled signal, and outputs the scrambled signal to the modulation mapper 1113-2. The modulation mapper 1113-2 modulates the scrambled signal based on a predetermined modulation mapping scheme to generate a modulated signal, and outputs the modulated signal to the hierarchy mapper 1115.

The layer mapper 1115 performs a layer mapping operation corresponding to a hierarchical mapping method set in advance for the modulated signals output from the modulation mapper 1113-1 and the modulation mapper 1113-2, And outputs the generated signal to the precoder 1117. The precoder 1117 precodes the signal output from the layer mapper 1115 based on a preset precoding scheme to generate a precoded signal and outputs the precoded signal to the antenna ports 1119. The antenna ports 1119 transmit signals output from the precoder 1117 to the air.

Alternatively, when the SWSC MIMO scheme according to an embodiment of the present invention is used, the layer mapper included in the signal transmission apparatus 1120 determines whether to divide the QAM symbols or to combine them into several transmission layers do. Here, the layer mapper determines how many transmission layers the QAM symbols are mapped to under the control of the controller 1110 included in the signal transmission apparatus 1120, and the controller 1110 transmits a feedback message Based on the CQI / CSI / PMI included in the QAM message, the QAM symbols are mapped to several transmission layers. Also, the signal transmitting apparatus 1120 designs a beamforming matrix for transmitting the respective SWSC superposition layer signals. The signal transmitting apparatus 1120 performs the operations described above on a symbol-by-symbol basis.

In particular, in FIG. 11, five hierarchical mappers corresponding to (3), i.e., a hierarchical mapper 1141-1, a hierarchical mapper 1141-2, a hierarchical mapper 1141-3, And the hierarchy mapper 1141-5 may be integrated into one hierarchy mapper. In this case, the one hierarchical mapper includes the hierarchy mapper 1141-1, the hierarchy mapper 1141-2, the hierarchy mapper 1141-3, the hierarchy mapper 1141-4, and the hierarchy mapper 1141- 5, and includes five precoders, that is, a precoder 1151-1, a precoder 1151-2, a precoder 1151-3, The signals output from the plurality of SWSC superposition layers can be used as input signals to generate a plurality of output signals respectively output to the precoder 1151-4 and the precoder 1151-5.

11 includes a controller 1110, a scrambler 1121-1, a scrambler 1121-2, a buffer 1123-1, a buffer 1123-2, a modulation mapper 1131 -1, a modulation mapper 1131-2, a modulation mapper 1131-3, a modulation mapper 1131-4, a modulation mapper 1131-5, a layer mapper 1141-1, The layer mapper 1141-2, the layer mapper 1141-3, the layer mapper 1141-4 and the layer mapper 1141-5, that is, the precoder 1151-1, the precoder 1151-1, 2, the precoder 1151-3, the precoder 1151-4, the precoder 1151-5, the adder 1153, and the antenna ports 1161, A scrambler 621-1, a scrambler 621-2, a buffer 623-1, a buffer 623-2, a modulation mapper 631-1, a modulation mapper 631-1, -2, a modulation mapper 631-3, a modulation mapper 631-4, a modulation mapper 631-5, a layer mapper 641-1, a layer mapper 641-2, A hierarchy mapper 641-3, a hierarchy mapper 641-4, a hierarchy mapper 641-5, that is, a precoder 651-1, The adder 653 and the antenna ports 661 and 651-2 and the precoder 651-3, the precoder 651-4, the precoder 651-5, the adder 653, The detailed description thereof will be omitted here.

11, the signal transmitting apparatus 1120 includes the controller 1110, the scrambler 1121-1, the scrambler 1121-2, the buffer 1123-1, the buffer 1123-2, A modulation mapper 1131-1, a modulation mapper 1131-2, a modulation mapper 1131-3, a modulation mapper 1131-4, a modulation mapper 1131-5, a hierarchical mapper The hierarchy mapper 1141-1 and the hierarchy mapper 1141-5 and the precoder 1151-1, the hierarchy mapper 1141-2, the hierarchy mapper 1141-3, the hierarchy mapper 1141-4, A precoder 1151-3, a precoder 1151-4, a precoder 1151-5, an adder 1153, antenna ports 1161, The signal transmitting apparatus 1120 includes the controller 1110, the scrambler 1121-1, the scrambler 1121-2, the buffer 1123-2, 1, a buffer 1123-2, a modulation mapper 1131-1, a modulation mapper 1131-2, a modulation mapper 1131-3, a modulation mapper 1131-4, 1131-5, a hierarchical mapper 1141 -1, a hierarchy mapper 1141-2, a hierarchy mapper 1141-3, a hierarchy mapper 1141-4, a hierarchy mapper 1141-5, that is, a precoder 1151-1, A pre-coder 1151-2, a precoder 1151-3, a precoder 1151-4, a precoder 1151-5, an adder 1153, and a plurality of antenna ports 1161 It is needless to say that at least two of them may be integrated.

In addition, the signal transmitting apparatus 1120 may be implemented by a single processor.

11 shows an example of a difference between a structure of a signal transmission apparatus of a general LTE mobile communication system and a structure of a signal transmission apparatus of a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention, A specific operation procedure according to an achievable rate region to be achieved in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention will now be described.

First, with reference to FIG. 12, a description will be made of a specific operation procedure of the SWSC MIMO scheme when one stream is transmitted in the wireless communication system according to an embodiment of the present invention.

FIG. 12 is a diagram schematically illustrating an exemplary operation procedure of an SWSC MIMO scheme when one stream is transmitted in a wireless communication system according to an embodiment of the present invention. Referring to FIG.

12, a specific operation procedure of the SWSC MIMO scheme shown in FIG. 12 is based on the assumption that one stream is transmitted, two SWSC superposition layers are formed for the one stream, and two antennas are used It should be noted that this is a concrete operation process for the SWSC MIMO scheme in the case of performing the MIMO scheme.

In Fig. 12, the longitudinal ellipses and the diagonal ellipses, and the definitions of the terms are the same as those described in Figs. 7 and 9, and a detailed description thereof will be omitted here.

12 is a flowchart illustrating an exemplary operation of the SWSC MIMO scheme when one stream is transmitted in a wireless communication system according to an embodiment of the present invention. Referring to FIG. 13, Another example of a specific operation procedure of the SWSC MIMO scheme when one stream is transmitted in the wireless communication system according to the embodiment will be described.

FIG. 13 is a diagram schematically showing another example of a specific operation procedure of the SWSC MIMO scheme when one stream is transmitted in the wireless communication system according to an embodiment of the present invention.

Referring to FIG. 13, a concrete operation procedure of the SWSC MIMO scheme shown in FIG. 13 is based on the assumption that one stream is transmitted, four SWSC superposition layers are configured for the one stream, and two antennas are used It should be noted that this is a concrete operation process for the SWSC MIMO scheme in the case of performing the MIMO scheme.

13, the definitions of the vertical ellipses and the diagonal ellipses and the terms are the same as those described with reference to Figs. 7 and 9, and thus a detailed description thereof will be omitted.

13, another example of a specific operation procedure of the SWSC MIMO scheme when one stream is transmitted in the wireless communication system according to an embodiment of the present invention has been described. Next, referring to FIG. 14, An exemplary operation procedure of the SWSC MIMO scheme when two streams are transmitted in the wireless communication system according to the embodiment will be described.

FIG. 14 is a diagram schematically illustrating an exemplary operation procedure of an SWSC MIMO scheme when two streams are transmitted in a wireless communication system according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 14, a detailed operation of the SWSC MIMO scheme shown in FIG. 14 is performed by transmitting two streams, configuring two SWSC superposition layers for each of the two streams, and using two antennas It should be noted that it is a concrete operation process for the SWSC MIMO scheme.

14, the definitions of the vertical ellipses and diagonal ellipses and the terms are the same as those described with reference to Figs. 7 and 9, and a detailed description thereof will be omitted here.

FIG. 14 illustrates an exemplary operation of the SWSC MIMO scheme when two streams are transmitted in the wireless communication system according to an embodiment of the present invention. Referring to FIG. 16, Description will be made of another example of the difference in the structure of the signal transmission apparatus of the system and the structure of the signal transmission apparatus of the wireless communication system using the SWSC SISO scheme according to the embodiment of the present invention.

16 is a diagram schematically illustrating another example of a structure of a signal transmitting apparatus of a general LTE mobile communication system and a difference of a structure of a signal transmitting apparatus of a wireless communication system using an SWSC SISO scheme according to an embodiment of the present invention .

Referring to FIG. 16, when a single antenna other than a multi antenna is applied to the SWSC MIMO scheme according to an embodiment of the present invention, the SWSC scheme based on the QAM scheme can be changed as shown in FIG.

First, one codeword is input to the scrambler 1611 in the signal transmitting apparatus 1600 of the general LTE mobile communication system. The scrambler 1611 generates a scrambled signal by scrambling the input codeword with a predetermined scrambling scheme, and outputs the scrambled signal to the modulation mapper 1613. The modulation mapper 1613 modulates the scrambled signal based on a predetermined modulation mapping scheme to generate a modulated signal, and then transmits the modulated signal to the air via the antenna 1615.

Next, when the SWSC MIMO scheme according to an embodiment of the present invention is used, the SWSC scheme based on the QAM scheme can be changed to use a single antenna instead of the multi-antenna scheme. Therefore, in the signal transmission apparatus 1620, And input to the scrambler 1621 and the scrambler 1631.

The scrambler 1621 generates a scrambled signal by scrambling the input codeword according to a predetermined scrambling scheme. The scrambled signal includes two subscrambled signals, one of the two subscrambled signals is directly output to a modulation mapper 1627, and the other of the two subscrambled signals is output to a buffer 1623). The buffer 1623 buffers the sub-scrambled signal for a preset time, and outputs the sub-scrambled signal to the modulation mapper 1627 at that time. The modulation mapper 1627 modulates based on a predetermined modulation scheme to generate a modulated signal, and the generated modulated signal is transmitted via an antenna 1629 to the air. Here, the modulation mapper 1627 operates under the control of the controller 1625.

The scrambler 1631 generates a scrambled signal by scrambling the input codeword according to a predetermined scrambling scheme. The scrambled signal includes two subscrambled signals and one of the two subscrambled signals is directly output to a modulation mapper 1635. The other of the two subscrambled signals is output to a buffer 1633). The buffer 1633 buffers the sub-scrambled signal for a preset time, and outputs the sub-scrambled signal to the modulation mapper 1637 at that time.

The modulation mapper 1635 modulates the modulated signal based on a predetermined modulation scheme, generates a modulated signal, and outputs the modulated signal to the adder 1641. The modulation mapper 1637 modulates the modulated signal based on a predetermined modulation scheme to generate a modulated signal, and outputs the modulated signal to the adder 1641. The adder 1641 adds the modulated signal output from the modulation mapper 1635 and the modulated signal output from the modulation mapper 1637 under the control of the controller 1639 to generate an added signal, The added signal is transmitted through the antenna 1643 to the air.

16, the signal transmitting apparatus 1620 includes a scrambler 1621, a buffer 1623, a controller 1625, a modulation mapper 1627, an antenna 1629, a scrambler 1631, A buffer 1633, a modulation mapper 1635, a modulation mapper 1637, a controller 1639, an adder 1641, and an antenna 1643 are shown as separate units The signal transmitting apparatus 1620 includes the scrambler 1621, a buffer 1623, a controller 1625, a modulation mapper 1627, an antenna 1629, a scrambler 1631, a buffer The modulation mapper 1637, the controller 1639, the adder 1641, and the antenna 1643 may be integrated in a form of an integrated circuit.

In addition, the signal transmitting apparatus 1620 may be implemented by a single processor.

16 illustrates another example of a structure of a signal transmission apparatus of a general LTE mobile communication system and a structure of a signal transmission apparatus of a wireless communication system using an SWSC SISO scheme according to an embodiment of the present invention. Referring to FIG. 17, in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention, a superposition coding list (hereinafter referred to as a " superposition coding list " Will be described.

17 is a diagram schematically illustrating a superposition coding list of a signal transmission apparatus in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention.

Referring to FIG. 17, when designing a signal transmitting apparatus using the QAM-SWSC scheme, the number of sliding-window superposition coding layers, superposition coding type, and constellation type should be considered. For example, when a 2-layer QAM-SWSC scheme (2-layer QAM-SWSC with 16-QAM / 16-QAM) using 16-QAM / 16- QAM is used, The superposition coding list of the superposition coding list can be generated.

FIG. 17 illustrates a superposition coding list of a signal transmission apparatus in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention. Next, An achievable rate region used in a wireless communication system using the MIMO scheme will be described.

First, when designing a signal transmitting apparatus using the QAM-SWSC scheme, the number of sliding-window superposition coding layers, the type of superposition coding, and the type of constellation are considered are the number of the sliding-window superposition coding layers, This is because the constellation type generates the QAM-SWSC achievable rate region. Thus, the signal transmitting device supports various achievable rate regions, thereby enabling an adaptive QAM-SWSC scheme based on a closed-loop.

Hereinafter, an example of the achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention will be described with reference to FIG.

18 is a diagram schematically illustrating an example of an achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention.

18, the achievable rate region shown in FIG. 18 is obtained by combining the SWSC superposition layer signals based on the 4-PAM + 4-PAM scheme and transmitting the 16-QAM scheme with SNR = 10 dB, It should be noted that it is an achievable rate region in the symmetric additive white Gaussian noise (AWGN) interference channel of SIR = 1dB.

FIG. 18 illustrates an example of a achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention. Referring to FIG. 19, FIG. Another example of the achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an example will be described.

19 is a diagram schematically showing another example of an achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention.

Referring to FIG. 19, in the case of modulating the superposition coding type by using the same uniform 16-QAM scheme and modulating each SWSC superposition layer signal by the QPSK + QPSK scheme, the achievable rate it is possible to achieve a different achievable rate region than the region. 19, the number of SWSC superposition layers and the constellation type are uniform constellation, and it should be noted that the number of SWSC superposition layers and the achievable rate region when they are kept the same as the constellation type are shown in FIG. will be.

FIG. 19 illustrates another example of the achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention. Referring to FIG. 20, Another example of the achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an example will be described.

20 is a diagram schematically illustrating another example of an achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention.

20, the number of SWSC superposition layers is changed so that each SWSC superposition layer signal is subjected to a BPSK (Binary Phase Shift Keying) + BPSK + BPSK + BPSK scheme even if the SWSC scheme uses the same uniform 16-QAM scheme In the case of modulation, a achievable rate region different from the achievable rate region shown in Figs. 18 and 19 can be achieved. In addition, it should be noted that the achievable rate region shown in FIG. 20 is a achievable rate region when the constellation type is uniformly constellated and is kept the same as the constellation type shown in FIG.

As shown in FIG. 20, when the number of SWSC superposition layers increases, an achievable rate region covering a wider area than the achievable rate region shown in FIG. 18 can be achieved.

20, another example of an achievable rate region in a wireless communication system using a QSC-based SWSC SISO / MIMO scheme according to an embodiment of the present invention is described. Next, referring to FIG. 21, Another example of the internal structure of the signal transmission apparatus to which the SWSC MIMO scheme is applied in the wireless communication system according to the embodiment will be described.

21 is a diagram schematically illustrating another example of the internal structure of a signal transmission apparatus to which an SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 21, it should be noted that the internal structure of the signal transmission apparatus shown in FIG. 21 is a structure for mapping a signal generated through the SWSC scheme to a layer mapper and a precoder in a serial manner to map to a multi-antenna .

First, a plurality of codewords, for example, two codewords are input to the scrambler 2111 and the scrambler 2113, respectively. The scrambler 2111 generates a scrambled signal by scrambling the input codeword with a predetermined scrambling scheme, and the scrambled signal includes two subscript-blended signals. One of the two subscrambled signals is output to a modulation mapper 2121, and the other of the two subscrambled signals is output to a buffer 2115. The buffer 2115 buffers the sub-scrambled signal output from the scrambler 2111 for a preset time, and outputs the buffered sub-scrambled signal to the modulation mapper 2121 at that time . The modulation mapper 2121 modulates the input sub-scrambled signals according to a predetermined modulation scheme to generate a modulated signal, and outputs the modulated signal to the hierarchical mapper 2129. Here, the operation of the modulation mapper 2121 is performed under the control of the controller 2119.

Meanwhile, the scrambler 2113 generates a scrambled signal by scrambling the input codeword with a predetermined scrambling scheme, and the scrambled signal includes two subscript-blended signals. One of the two subscrambled signals is output to a modulation mapper 2127, and the other of the two subscrambled signals is output to a buffer 2117. The buffer 2117 buffers the sub-scrambled signal output from the scrambler 2113 for a preset time, and outputs the buffered sub-scrambled signal to the modulation mapper 2127 at that time . The modulation mapper 2127 modulates the input sub-scrambled signals according to a predetermined modulation scheme to generate a modulated signal, and outputs the modulated signal to the hierarchy mapper 2129. Here, the operation of the modulation mapper 2127 is performed under the control of the controller 2123.

The layer mapper 2129 hierarchically maps the signals output from the modulation mapper 2121 and the modulation mapper 2127 in accordance with a hierarchical mapping method set in advance to generate a layer mapped signal, And outputs it to the precoder 2131. The precoder 2131 precodes the layer mapped signals output from the layer mapper 2129 based on a preset precoding scheme and outputs the precoded signals to the antenna ports 2133. The antenna ports 2133 transmit signals output from the precoder 2131 to the air.

21, the signal transmission apparatus includes a scrambler 2111, a scrambler 2113, a buffer 2115, a buffer 2117, a controller 2119, a modulation mapper 2121, a controller 2123, a modulator 2127, a hierarchical mapper 2129, a precoder 2131, and antenna ports 2133, the signal transmission apparatus may be implemented as separate units, A scrambler 2113, a buffer 2115, a buffer 2117, a controller 2119, a modulation mapper 2121, a controller 2123, a modulator 2127, It is needless to say that at least two of the layer mapper 2129, the precoder 2131, and the antenna ports 2133 may be integrated.

21, another example of the internal structure of a signal transmission apparatus to which a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention is described. Next, referring to FIG. 22, Another example of the internal structure of a signal transmission apparatus to which the SWSC MIMO scheme is applied in a wireless communication system will be described.

22 is a diagram schematically illustrating another example of the internal structure of a signal transmission apparatus to which a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention.

22, it should be noted that the internal structure of the signal transmission apparatus shown in FIG. 22 is a structure for mapping a signal generated through the SWSC scheme to a layer mapper and a precoder in a serial manner to map to a multi-antenna .

First, a plurality of codewords, for example, two codewords are input to the scrambler 2211 and the scrambler 2213, respectively. The scrambler 2211 generates a scrambled signal by scrambling the input codeword with a predetermined scrambling scheme, and the scrambled signal includes two subscript-blended signals. One of the two subscrambled signals is output to a modulation mapper 2219 and the other of the two subscrambled signals is output to a buffer 2215. The buffer 2215 buffers the subscrambled signal output from the scrambler 2211 for a preset time and outputs the buffered subscrambled signal to the mapper 2221 at that time. The modulation mapper 2219 and the modulation mapper 2221 modulate the input sub-scrambled signal according to a predetermined modulation scheme to generate a modulated signal, and then output the modulated signal to the adder 2225. The adder 2225 adds the signals output from the modulation mapper 2219 and the modulation mapper 2221 under the control of the controller 2223 and outputs the signals to the layer mapper 2235.

Meanwhile, the scrambler 2213 generates scrambled signals by scrambling the input codewords with a predetermined scrambling scheme, and the scrambled signals include two subscript-blended signals. One of the two subscrambled signals is output to a modulation mapper 2227 and the other of the two subscrambled signals is output to a buffer 2217. The buffer 2217 buffers the subscrambled signal output from the scrambler 2213 for a preset time and outputs the buffered subscrambled signal to the modulation mapper 2229 at that time. Each of the modulation mapper 2227 and the modulation mapper 2229 modulates the input sub-scrambled signal according to a predetermined modulation scheme to generate a modulated signal, and outputs the modulated signal to the adder 2233. The adder 2233 adds the signals output from the modulation mapper 2227 and the modulation mapper 2229 under the control of the controller 2231 and outputs the signals to the hierarchy mapper 2235.

The hierarchy mapper 2235 hierarchically maps the signals output from the adder 2225 and the modulation mapper 2233 in accordance with a hierarchical mapping method set in advance to generate hierarchically mapped signals, And outputs it to the precoder 2237. The precoder 2237 precodes the layer mapped signals output from the layer mapper 2235 based on a preset precoding scheme and outputs the precoded signals to the antenna ports 2239. The antenna ports 2239 transmit signals output from the precoder 2237 to the air.

22, the signal transmitting apparatus includes a scrambler 2211, a scrambler 2213, a buffer 2215, a buffer 2217, a modulation mapper 2219, a modulation mapper 2221, An adder 2223, a hierarchy mapper 2235, a precoder 2237, and an adder 2233. The adder 2223 adds the adder 2225, the modulation mapper 2227, the modulation mapper 2229, the controller 2231, And the antenna ports 2239. The signal transmission apparatus includes the scrambler 2211, the scrambler 2213, the buffer 2215, the buffer 2217, A modulation mapper 2221, a modulation mapper 2221, a controller 2223, an adder 2225, a modulation mapper 2227, a modulation mapper 2229, a controller 2231, an adder 2233, the hierarchical mapper 2235, the precoder 2237, and the antenna ports 2239 may be integrated.

Another example of the internal structure of the signal transmission apparatus to which the SWSC MIMO scheme is applied in the wireless communication system according to the embodiment of the present invention is explained. Next, the UE feeds back the PMI, and the base station, based on the PMI, The precoding matrix is determined as follows. For convenience of explanation, it is assumed that the number of SWSC superposition layers is two and the modulation order is fixed.

First, UE 1 selects a PMI 1 candidate set, ie, a candidate set for T ₁₁ and T ₁₂ , and a PMI 2 candidate set using a channel matrix H ₁₁ and a channel matrix H ₁₂ measured for the channel from the base station 1 and the base station 2 to the UE 1, , The rate region R ₁ and the rate region R ₂ based on the candidate set of T ₂₁ and T ₂₂ .

For example, if the UE 1 receives an interfering signal -> desired signal -> interfering signal -> desired signal -> ... The rate region R ₁ and the rate region R ₂ in the UE 1 can be determined according to Equation (3) below.

&Quot; (3) "

이고,

이다. 또한, 상기 수학식 3에서,

이고,

이다.In Equation (3)

ego,

to be. Also, in Equation (3)

ego,

to be.

Since the rate region as shown in Equation (3) is based on a single symbol, an average rate region (hereinafter referred to as an " average rate region ") based on a codeword including a plurality of symbols In order to detect an average rate region between rate regions as shown in Equation (3), an average of a Minkowski sum (hereinafter referred to as " Minkowski sum ") is detected. Thus, various information (as candidates) for the candidate set of PMI 1, the candidate set of PMI 2, and the average rate region (R ₁ , R ₂ ) corresponding to the candidate set of PMI 1 and the candidate set of PMI 2 are fed back to the base station 1 .

The operation in the UE 2 is also similar to that in the UE 1, and will be described in detail as follows.

First, the UE 2 uses a channel matrix H ₂₁ and a channel matrix H ₂₂ measured for the channel from the BS 1 and the BS 2 to the PMI 1 candidate set, i.e., a candidate set for T ₁₁ and T ₁₂ , and a PMI Compute each rate region (R ₁ , R ₂ ) based on a candidate set of 2, a candidate set for T ₂₁ and T ₂₂ .

For example, if the UE 2 receives an interfering signal -> desired signal -> interfering signal -> desired signal -> ... The rate region R ₁ and the rate region R ₂ in the UE 2 can be determined according to Equation (4).

&Quot; (4) "

이고,

이고,

이고,

이다.In Equation (4)

ego,

ego,

ego,

to be.

Since the rate region as shown in Equation (4) is based on one symbol, in order to detect an average rate region based on a code word including a plurality of symbols, The average of the Minkowski sum is detected to detect the average rate region between the rate regions. Thus, various information (as candidates) for the candidate set of PMI 1, the candidate set of PMI 2, and the average rate region (R ₁ , R ₂ ) corresponding to the candidate set of PMI 1 and PMI 2 are fed back to the base station 2 .

A control unit for managing the Node Bs 1 and 2 based on the information fed back from the UE 1 and the UE 2 receives from the UE 1 and the UE 2 an average rate region R1, R2) is detected in order to detect the intersection of all the candidate groups. Here, the control unit selects PMI 1 and PMI 2 corresponding to the largest rate region of the rate regions generated in the intersection, and transmits the selected PMI 1 and PMI 2 to each base station through a signal transmission based on the MIMO SWSC scheme To be used. Herein, each of the base stations, i.e., the base station 1 and the base station 2, generates and transmits a MIMO SWSC signal based on PMI 1 and PMI 2 notified from the control unit.

혹은

가 될 수 있으며, v_ij 혹은 u_ij는 변조 방식이 QPSK 방식일 경우, constellation의 위치에 따라

중 어느 하나의 값이 될 수 있으며, H_ij가 포함하는 값들은 채널에 따라 부여되는 복소수(complex number)로 결정된다. 또한, 상기 수학식 3 및 수학식 4에서 E는 기대값(expectation)을 선택하는 것을 나타낸다. On the other hand, an example of a PMI

or

And v _ij or u _ij is the modulation scheme of the QPSK scheme, depending on the position of the constellation

, And the values included in H _ij are determined as a complex number assigned to each channel. In Equation (3) and Equation (4), E indicates that an expectation is selected.

First, the signal transmission apparatus maps a scrambled signal, that is, a scrambled codeword, to a modulated signal based on a predetermined mapping scheme, for example, a modulation symbol. Here, the mapping scheme may be implemented in various manners, and will be described in detail as follows. First, with reference to FIG. 23, a description will be made of a mapping scheme when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention.

23 is a diagram schematically illustrating constellation of a 16-QAM scheme in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 23, it should be noted that the mapping scheme illustrated in FIG. 23 is a mapping scheme in a case where a signal transmission apparatus uses two antennas and 16-QAM scheme is used as a modulation scheme.

Thus, since the signal transmitting apparatus uses two antennas, a 16-QAM symbol is transmitted through each of the two antennas.

First, the bits included in the scrambled signal, for example, the scrambled code word output from the scrambler 621-1, as illustrated in FIG. 6, are transmitted according to the positions mapped to the 16-QAM symbol, a significant bit (LSB), and a most significant bit (MSB).

First, a 16-QAM constellation as shown in FIG. 23 will be considered. If the bits mapped to the 16-QAM symbol are "1011 ", the LSB is 01 and the MSB is 11. That is, the MSB of the bits mapped to the 16-QAM symbol is related to which quadrant the 16-QAM symbol is located in the fourth quadrant of the 16-QAM constellation, and among the bits mapped to the 16-QAM symbol The LSB relates to which constellation point the 16-QAM symbol represents in the quadrant determined based on the MSB.

If the two transmit antennas are assumed to be the antenna 1 and the antenna 2, the LSB and the MSB included in the 16-QAM symbol transmitted through the antenna 1 will be referred to as L1 and M1, respectively.

The LSB and the MSB included in the 16-QAM symbol transmitted through the antenna 2 will be referred to as L2 and M2, respectively.

First, under the assumption that the codeword scrambled in the SWSC MIMO scheme includes a U1 layer signal and a U2 layer signal, i.e., two sliding-window superposition coding layers for a stream to be transmitted by the signal transmitting apparatus, And the U2 layer are applied, the mapping scheme proposed in the embodiment of the present invention is as shown in Figs. 24A and 24B.

24A and 24B are views schematically showing an example of a mapping method when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 24A, the mapping scheme shown in FIG. 24A is such that the signal transmission apparatus uses two antennas, for example, antenna 1 and antenna 2, and two sliding-window superposition coding layers, And a U2 layer. In particular, a mapping scheme in the case of U1 = (L1, M1) and U2 = (L2, M2) is shown. Also, it should be noted that the mapping method shown in FIG. 24A is expressed by considering only two blocks, for example, block 1 and block 2, for convenience of explanation.

As shown in Fig. 24A, in block 1, a known message is transmitted via antenna 1 and a U2 codeword is transmitted via antenna 2. In block 2, a U1 code word is transmitted through antenna 1, and a U2 code word (not separately shown in FIG. 24A) included in the N2 message is transmitted through antenna 2. Herein, the N2 message indicates a currently transmitted message, i.e., a message transmitted after the N1 message, and the N2 message also includes a U1 code word and a U2 code word. It should be noted that the U1 codeword and the U2 codeword shown in FIG. 24A are the U1 codeword and the U2 codeword which are included in the currently transmitted message, that is, the N1 message.

24B, the mapping scheme shown in FIG. 24B is such that the signal transmission apparatus uses two antennas, for example, antenna 1 and antenna 2, and two sliding-window superposition coding layers, U1 layer and U2 layer. In particular, the mapping method in the case of U1 = (L2, M2) and U2 = (L1, M1) is shown. It should be noted that the mapping method shown in FIG. 24B is expressed by considering only two blocks, for example, block 1 and block 2, for convenience of explanation.

As shown in Fig. 24B, in block 1, a U2 codeword is transmitted through antenna 1 and a known message is transmitted via antenna 2. In block 2, the U2 code word included in the N2 message (not separately shown in FIG. 24B) is transmitted through the antenna 1, and the U1 code word is transmitted through the antenna 2. It should be noted that the U1 code word and the U2 code word shown in FIG. 24B are the U1 code word and the U2 code word included in the currently transmitted message, that is, the N1 message. FIGS. 24A and 24B show one embodiment An example of a mapping scheme in a case where a SWSC MIMO scheme is applied in a wireless communication system according to an example has been described. Next, a SWSC MIMO scheme in a wireless communication system according to an embodiment of the present invention will be described with reference to FIGS. 25A to 25D. Another example of the mapping method when applied will be described.

25A to 25D are views schematically showing another example of a mapping method when the SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention.

25A, the mapping scheme shown in FIG. 25A is such that the signal transmission apparatus uses two antennas, for example, antenna 1 and antenna 2, and two sliding-window superposition coding layers, And the U2 layer, and in particular, a mapping method when U1 = (M1, M2) and U2 = (L1, L2). It should be noted that the mapping method shown in FIG. 25A is expressed by considering only two blocks, for example, block 1 and block 2, for convenience of explanation.

As shown in FIG. 25A, in L1, L1 and a known message included in a U2 codeword are transmitted through an antenna 1, and L2 and a known message including a U2 codeword are transmitted through an antenna 2 in block 1. In block 2, M1 (not shown in FIG. 25A) included in the U2 message included in the N2 message included in the N2 message and M1 included in the U1 code word are transmitted through the antenna 1, and N2 message (Not shown separately in FIG. 25A) included in the U2 code word included in the U2 code word, and M2, which is included in the U1 code word, are transmitted. It should be noted that the U1 codeword and the U2 codeword shown in FIG. 25A are the U1 codeword and the U2 codeword that are included in the currently transmitted message, that is, the N1 message.

25B, the mapping scheme shown in FIG. 25B is such that the signal transmission apparatus uses two antennas, for example, antenna 1 and antenna 2, and two sliding-window superposition coding layers, And a U2 layer. In particular, a mapping scheme in the case of U1 = (L1, L2) and U2 = (M1, M2) is shown. It should be noted that the mapping scheme shown in FIG. 25B is expressed by considering only two blocks, for example, block 1 and block 2, for convenience of explanation.

As shown in FIG. 25B, in the block 1, M1, which is included in the known message and the U2 code word, is transmitted through the antenna 1, and M2, which includes the known message and the U2 code word, is transmitted through the antenna 2. In block 2, M1 (not shown in FIG. 25B) included in the U2 code word included in the L1 and N2 messages included in the U1 code word is transmitted through the antenna 1, and U1 M2 (not separately shown in Fig. 25B) contained in the U2 code word included in the L2 and N2 messages included in the codeword is transmitted. It should be noted that the U1 codeword and the U2 codeword shown in FIG. 25B are the U1 codeword and the U2 codeword that are included in the currently transmitted message, that is, the N1 message.

Referring to FIG. 25C, the mapping scheme shown in FIG. 25C is such that the signal transmission apparatus uses two antennas, for example, antenna 1 and antenna 2, and two sliding-window superposition coding layers, U1 layer and U2 layer. In particular, it indicates a mapping method when U1 = (L1, M2) and U2 = (M1, L2). It should be noted that the mapping method shown in FIG. 25C is expressed by considering only two blocks, for example, block 1 and block 2, for convenience of explanation.

As shown in FIG. 25C, in the block 1, M1, which is included in the known message and the U2 codeword, is transmitted through the antenna 1, and L2 and the known message including the U2 codeword are transmitted through the antenna 2. In Block 2, M1 (not shown in FIG. 25C) included in the U2 code word included in the L1 and N2 messages included in the U1 code word is transmitted through the antenna 1, and N2 M2 (not shown separately in Fig. 25C) included in the U2 code word included in the message and M2 including the U1 code word are transmitted. It should be noted that the U1 codeword and the U2 codeword shown in FIG. 25C are the U1 codeword and the U2 codeword that are included in the currently transmitted message, that is, the N1 message.

25D, the mapping scheme shown in FIG. 25D is such that the signal transmission apparatus uses two antennas, for example, antenna 1 and antenna 2, and two sliding-window superposition coding layers, U1 layer and U2 layer. In particular, it indicates a mapping method when U1 = (M1, L2) and U2 = (L1, M2). It should be noted that the mapping scheme shown in FIG. 25D is expressed by considering only two blocks, for example, block 1 and block 2, for convenience of explanation.

As shown in FIG. 25D, in block 1, L1 and a known message included in the U2 codeword are transmitted through the antenna 1, and M2 including the known message and the U2 codeword is transmitted through the antenna 2. In block 2, L1 (not separately shown in FIG. 25D) included in the U2 code word included in the N2 message is transmitted through the antenna 1, L2 and N2 included in the U1 code word are transmitted through the antenna 2, M2 (not separately shown in Fig. 25D) included in the U2 code word included in the message is transmitted. It should be noted that the U1 codeword and the U2 codeword shown in FIG. 25D are the U1 codeword and the U2 codeword that are included in the currently transmitted message, that is, the N1 message.

25A to 25D illustrate another example of a mapping scheme when the SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention. Next, referring to FIG. 26, Another example of a mapping scheme when the SWSC MIMO scheme is applied in a wireless communication system will be described.

26 is a diagram schematically illustrating another example of a mapping method when the SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention.

26, when the bit sequence length included in the U1 code word and the bit sequence length included in the U2 code word are different, that is, when the number of bits included in the U1 code word And the number of bits included in the U2 codeword are different from each other.

Alternatively, the mapping schemes described in FIGS. 24A to 24B and FIGS. 25A to 25D may be used when the bit sequence length included in the U1 codeword is equal to the bit sequence length included in the U2 codeword, that is, when the U1 codeword is included And the number of bits included in the U2 codeword are equal to each other.

26, the mapping scheme shown in FIG. 26 is such that the signal transmission apparatus uses two antennas, for example, antenna 1 and antenna 2, and two sliding-window superposition coding layers, And a U2 layer. In particular, a mapping scheme in the case of U1 = (M2) and U2 = (L1, M1, L2) is shown. It should be noted that the mapping method shown in FIG. 26 is expressed by considering only two blocks, for example, block 1 and block 2, for convenience of explanation.

As shown in Fig. 26, in the block 1, M1 including L1 and U2 code words included in the U2 code word is transmitted through the antenna 1, and L2, which is included in the U2 code word, A message is sent. In Block 2, L1 and M1 (not separately shown in FIG. 26) included in the U2 code word included in the N2 message are transmitted through the antenna 1, and U2 code included in the N2 message L2 contained in the word (not separately shown in Fig. 26) and M2 including the U1 codeword are transmitted. It should be noted that the U1 codeword and the U2 codeword shown in FIG. 26 are the U1 codeword and the U2 codeword that are included in the currently transmitted message, that is, the N1 message.

26, when the bit sequence length included in the U1 code word and the bit sequence length included in the U2 code word are different, that is, when the number of bits included in the U1 code word is 1 and the number of bits included in the U2 code word , The number of possible mapping methods is eight, including the mapping method shown in FIG. That is, the 4C3 X2 (= 8) possible mapping schemes are the same as in FIG. 26A because the U1 codeword includes one element, e.g., M2, and the U2 codeword includes three elements, There are a total of 8 including the mapping method shown in FIG.

26, another example of the mapping scheme when the SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention is described. Next, referring to FIG. 27, Another example of the mapping method when the SWSC MIMO scheme is applied in the system will be described.

FIG. 27 is a diagram schematically illustrating another example of a mapping method when a SWSC MIMO scheme is applied in a wireless communication system according to an embodiment of the present invention. Referring to FIG.

27, the mapping scheme shown in Fig. 27 is such that the signal transmission apparatus uses two antennas, e.g., antenna 1 and antenna 2, and four sliding-window superposition coding layers, e.g., U1 A U2 layer, a U3 layer, and a U2 layer. In particular, a mapping scheme is shown when U1 = L1, U2 = M1, U3 = L2, and U4 = M2. It should be noted that the mapping method shown in FIG. 27 is expressed by considering only four blocks, for example, block 1, block 2, block 3 and block 4, for convenience of explanation.

As shown in FIG. 27, in the block 1, a known message is transmitted through the antenna 1, and a known message and a U4 codeword, that is, M2, are transmitted through the antenna 2. In block 2, a known message is transmitted via antenna 1, and a U3 codeword, i.e., a U4 codeword (not separately shown in FIG. 27), which is included in L2 and N2 messages is transmitted through antenna 2. Here, the N2 message indicates a message transmitted after the N1 message when the current message including the U1 code word to the U4 code word shown in FIG. 27 is the N1 message, and the N2 message is also the U1 code word To U4 code words.

In block 3, a known message and a U2 codeword, i.e., M1, are transmitted through antenna 1, and a U3 codeword (not shown separately in FIG. 27) and an N3 message included in the N2 message through antenna 2 U4 code words (not separately shown in Fig. 27) are transmitted. Here, the N3 message represents a message transmitted after the N2 message, and the N3 message also includes the U1 code word to the U4 code word.

In block 4, a U1 code word, i.e., a U2 code word (not separately shown in FIG. 27) included in the L1 and N2 messages is transmitted through the antenna 1, and U3 A code word (not separately shown in FIG. 27) and a U4 code word (not separately shown in FIG. 27) that the N4 message contains are transmitted. Here, the N4 message represents a message transmitted after the N3 message, and the N4 message also includes U1 code word to U4 code word. It should also be noted that the U1 code word to U4 code word shown in FIG. 27 are the U1 code word to U4 code word included in the currently transmitted message, that is, the N1 message.

Assuming the situation as shown in FIG. 27, there are a total of 24 possible mapping methods including the mapping method shown in FIG. That is, since each of the U1 code word to the U4 code word includes one element, it can be seen that there are 4C1X3C1X2C1 (= 24) possible mapping schemes.

In the mapping scheme as described in FIG. 27, the symbol sequence to be transmitted through the antenna 1 is determined through the superposition of symbol units between the U1 layer and the U2 layer. Similarly, a symbol sequence to be transmitted through the antenna 2 is determined between the U3 layer and the U4 layer through the superposition of symbols in units of symbols. As described in FIGS. 23 to 27, the mapping scheme proposed in the embodiment of the present invention I.e., the mapping scheme used in the modulation mapper, is determined based on the number of layers used in the SWSC scheme, the number of antennas used in the signal transmission apparatus, and the number of bits included in the modulation symbol.

As described above, the mapping scheme according to an exemplary embodiment of the present invention includes the number of sliding-window superposition coding layers used in the SWSC scheme, the number of antennas used in the signal transmission apparatus, and the number of bits included in the modulation symbol A plurality of mapping schemes can be implemented. In this way, when a plurality of mapping schemes are implemented under the same conditions, it is needless to say that the signal transmission apparatus may use all of the implemented mapping schemes, or may use only some of the plurality of mapping schemes.

When the signal transmitting apparatus uses a part of the plurality of mapping methods, the signal transmitting apparatus can select some mapping methods based on preset criteria, which will be described in detail as follows.

First, the signal transmission apparatus can select mapping schemes based on a theoretical threshold of the transmission amount among the plurality of mapping schemes. Here, there are various methods for detecting the theoretical threshold value for the transmission amount, and a detailed description thereof will be omitted.

Secondly, the signal transmission apparatus can select mapping schemes that maximize the minimum distance between the modulation symbols.

Thirdly, the signal transmitting apparatus selects a mapping scheme for eliminating ambiguity when a signal receiving apparatus removes an interference signal from a received signal by applying a mapping scheme and detects a desired signal, for example, a desired symbol .

Fourthly, the signal transmission apparatus can select mapping schemes such that effective channels experienced by the same codeword are maintained within a preset range.

The signal transmitting apparatus may select a mapping scheme considering only one of the four schemes described above and select a mapping scheme considering at least two of the four schemes.

On the other hand, the signal transmission apparatus may select the mapping schemes at the time of generating an event or may periodically select the mapping schemes. Alternatively, the signal transmission apparatus may use only predetermined mapping schemes.

Meanwhile, the signal transmitting apparatus needs to transmit information related to the mapping method selected by the signal transmitting apparatus to the signal receiving apparatus, which will be described in detail as follows.

First, when the mapping method used by the signal transmitting apparatus is fixed, the signal transmitting apparatus and the signal receiving apparatus know the mapping method in advance, and therefore it is not necessary to separately transmit / receive information related to the mapping method .

Second, when there are a plurality of mapping methods available to the signal transmitting apparatus, the signal transmitting apparatus selects any one of the plurality of mapping methods, and transmits information related to the selected mapping method to the signal receiving apparatus There is a need to do. For example, a mapping scheme index is allocated to each of a plurality of mapping schemes available to the signal transmitting apparatus, and the signal transmitting apparatus transmits a mapping scheme index to be used by the signal transmitting apparatus to the signal receiving apparatus.

Here, the information related to the mapping scheme may be transmitted through a control channel used in a wireless communication system using the SWSC MIMO scheme according to an embodiment of the present invention. For example, if it is assumed that the wireless communication system using the SWSC MIMO scheme according to an embodiment of the present invention is an LTE mobile communication system, the information related to the mapping scheme includes a physical downlink control channel (PDCCH) (Hereinafter referred to as "PDCCH").

Alternatively, the information related to the mapping scheme may include a radio resource control (RRC) message used in a wireless communication system using the SWSC MIMO scheme according to an embodiment of the present invention. Lt; / RTI > Here, the RRC message to which information related to the mapping scheme is transmitted may be implemented as a new RRC message, or may be implemented by changing an existing RRC message.

Meanwhile, the signal receiving apparatus receives information related to the mapping scheme from the signal transmission apparatus, and performs a reception operation based on the mapping scheme.

In the above description, the case where the signal transmitting apparatus transmits the information related to the mapping method and the signal receiving apparatus receives the information related to the mapping method transmitted from the signal transmitting apparatus and performs the receiving operation, Of course, the direct mapping method can also be selected. In this case, the method by which the signal receiving apparatus selects the mapping method itself may be similar to the method by which the signal transmitting apparatus selects the mapping method. However, the signal receiving apparatus may transmit information related to the mapping method selected by the signal receiving apparatus itself It is necessary to transmit to the transmitting apparatus.

In this case, the information related to the mapping scheme may be transmitted through a control channel used in a wireless communication system using the SWSC MIMO scheme according to an embodiment of the present invention. For example, if it is assumed that the wireless communication system using the SWSC MIMO scheme according to an embodiment of the present invention is an LTE mobile communication system, the information related to the mapping scheme includes a physical uplink control channel (PUCCH) (Hereinafter referred to as "PUCCH").

In addition, the information related to the mapping scheme may be transmitted through an RRC message used in a wireless communication system using the SWSC MIMO scheme according to an embodiment of the present invention. Here, the RRC message to which information related to the mapping scheme is transmitted may be implemented as a new RRC message, or may be implemented by changing an existing RRC message.

In addition, the information related to the mapping scheme is referred to as a physical uplink shared channel (PUSCH) used in a wireless communication system using the SWSC MIMO scheme according to an embodiment of the present invention Lt; / RTI >

In addition, the information related to the mapping scheme may be transmitted through a data channel used in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention.

Accordingly, the signal transmission apparatus receives information related to the mapping scheme from the signal reception apparatus, and performs a transmission operation based on the mapping scheme.

Next, an example of the internal structure of a signal receiving apparatus in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention will be described with reference to FIG.

28 is a diagram schematically illustrating an internal structure of a signal receiving apparatus in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention.

Referring to FIG. 28, the internal structure of the signal receiving apparatus shown in FIG. 28 represents the internal structure of the UE 1, so that the signal for the UE 2 becomes an interference signal for the UE 1.

The signal receiving apparatus includes antenna ports 2811, a MIMO detector 2813, and an SWSC decoder 2815. Here, the number of receive antennas is 2 in the antenna ports 2811, and the number of streams used by each UE is 2.

The received signal vectors received through the antenna ports 2811 are transmitted to the MIMO detector 2813. The MIMO detector 2813 detects streams 1 and 2 for the UE 1 by applying a MIMO detection scheme preset for the received signal vectors and detects streams 1 and 2 for the UE 2 And outputs it to the SWSC decoder 2815. The SWSC decoder 2815 performs a decoding operation in accordance with a predetermined SWSC decoding scheme to detect data bits for stream 1 and stream 2 for the UE 1. Since the decoding operation corresponding to the SWSC decoding method has been described in detail above, a detailed description thereof will be omitted here.

In FIG. 28, an example of the internal structure of a signal receiving apparatus in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention is described. Next, referring to FIG. 29, An example of the internal structure of a UE in a wireless communication system using the SWSC MIMO scheme will be described.

29 is a diagram schematically illustrating an example of the internal structure of a UE in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention.

29, the UE 2900 may be connected to an external electronic device (not shown separately in FIG. 29) using at least one of a communication module, a connector, and an earphone connection jack. The external electronic device may include an earphone, an external speaker, and a universal serial bus (USB), which are detachably connected to the UE 2900 and can be connected by wire, A memory, a charger, a cradle / dock, a digital media broadcasting (DMB) antenna, a mobile payment device, a healthcare device (blood glucose meter) A navigation device, and the like.

In addition, the external electronic device may be a Bluetooth communication device, a near field communication (NFC) device, a Wi-Fi direct communication device, a wireless AP, or the like. The UE 2900 may be connected to a server or another communication device, such as a mobile phone, a smart phone, a tablet PC, a desktop PC, and a server, using wired or wireless communication.

The UE 2900 includes a camera processing unit 2911, an image processing unit 2913, a display unit 2915, a controller 2917, a radio frequency (RF) A data processing section 2921, a memory 2923, an audio processing section 2925, and a key input section 2927. The input /

First, the RF processor 2919 performs a radio communication function of the UE 2900. The RF processor 2919 includes an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplifying the received signal and down-converting the frequency of the received signal.

The data processing unit 2921 includes a transmitter for encoding and modulating the transmitted signal, and a receiver for demodulating and decoding the received signal. That is, the data processing unit 2921 may be composed of a modulator / de-modulator (MODEM) and a codec / decoder (CODEC) have. Here, the CODEC includes a data CODEC for processing packet data and the like, and an audio CODEC for processing audio signals such as voice.

The audio processing unit 2925 plays back the received audio signal output from the audio CODEC of the data processing unit 2921 or transmits a transmission audio signal generated from the microphone to the audio CODEC of the data processing unit 2921.

The key input unit 2927 includes keys for inputting numbers and character information, and function keys for setting various functions.

The memory 2923 may include a program memory, a data memory, and the like. The program memory includes programs for controlling the general operation of the UE 2900 and operations for transmitting and receiving signals in a wireless communication system using the SWSC MIMO scheme according to an embodiment of the present invention, And a sliding-window-superposition coding layer in order to make it possible to generate a desired achievable rate region based on the CQI, the CSI, the PMI, the QoS, and the number of antennas included in the feedback message received from the mobile station. A structure of a QAM modulation layer according to the structure of the sliding-window superposition coding layer, a structure of a QAM modulation layer, and a beamforming matrix for transmitting each SWSC superposition layer can be stored have. Here, the combination of the number of streams and the QAM according to the structure of the sliding-window superposition coding layer can be implemented based on a mapping method. Since the mapping method has been described in detail above, detailed description thereof will be omitted here . The data memory temporarily stores data generated during the execution of the programs.

The memory 2923 includes a read only memory (ROM), a random access memory (RAM), a memory card such as a memory card (e.g., secure digital (SD) card, memory stick), and the like. The memory 3323 may include a nonvolatile memory, a volatile memory, a hard disk drive (HDD), or a solid state drive (SSD) Quot ;, and the like).

The memory 2923 can also be used for various applications such as navigation, video calls, games, time-based alarm applications to users, and related graphical user interfaces (GUIs) (Menu screen, idle screen, etc.) necessary for driving the UE 2900, or images for providing the user's information Operating programs, images photographed by the camera processing unit 2911, and the like.

Further, the memory 2923 is a medium that can be read by a machine (e.g., a computer), and the term " machine readable medium " refers to a medium that provides data to the machine Can be defined. Also, the memory 2923 may include non-volatile media and volatile media. All such media must be of a type such that the commands conveyed by the medium can be detected by the machine-readable physical mechanism.

The machine readable medium may be, but is not limited to, a floppy disk, a flexible disk, a hard disk, a magnetic tape, a compact disk read-only memory (CD-ROM) (ROM), an optical disk, a punch card, a paper tape, a RAM, a programmable read-only memory (PROM) Erasable programmable read-only memory (EPROM), and flash-erasable programmable read-only memory (RAM) flash-EPROM (hereinafter referred to as " flash-EPROM ").

The controller 2917 controls the overall operation of the UE 2900. The controller 2917 transmits and receives a signal in a wireless communication system using the SWSC MIMO scheme according to an exemplary embodiment of the present invention. In particular, the controller 2917 transmits a CQI included in a feedback message received from the UE to a CSI The number of streams and the structure of the sliding-window superposition coding layer, the number of the streams, and the number of slots and the sliding-window superposition coding layer in order to make it possible to generate a desired achievable rate region based on the PMI, The QAM modulation layer structure, and the beamforming matrix for transmitting each SWSC superposition layer. In the wireless communication system using the SWSC MIMO scheme according to an exemplary embodiment of the present invention, an operation of transmitting and receiving a signal, in particular, a CQI, a CSI, a PMI, and a CQI included in a feedback message received from the UE The number of streams, the structure of the sliding-window superposition coding layer, the number of streams, and the structure of the sliding-window superposition coding layer, in order to enable to generate a desired achievable rate region based on the number of streams, The operation for enabling the combination, the structure of the QAM modulation layer, and the beamforming matrix for transferring each SWSC superposition layer is the same as that described with reference to FIGS. 1 to 27, and thus a detailed description thereof will be omitted. In addition, the combination of QAM according to the number of streams and the structure of the sliding-window superposition coding layer can be implemented based on a mapping method. Since the mapping method has been described in detail above, detailed description thereof will be omitted .

The camera processor 2911 includes a camera sensor that captures image data, converts the captured optical signal into an electrical signal, and a signal processor that converts an analog image signal captured by the camera sensor into digital data. Here, it is assumed that the camera sensor is a CCD (charge coupled device) or a complementary metal-oxide-semiconductor (CMOS) sensor, and the signal processing unit includes a digital signal processor processor (DSP), hereinafter referred to as " DSP "). In addition, the camera sensor and the signal processing unit may be integrated or separately implemented.

The image processor 2913 performs an image signal processing (hereinafter referred to as "ISP") for displaying the image signal output from the camera processor 2911 on the display unit 2915, The ISP performs functions such as gamma correction, interpolation, spatial changes, image effects, image scaling, automatic white balance (AWB), automatic exposure (AE), and automatic focus (AF) Accordingly, the image processing unit 2913 processes the image signal output from the camera processing unit 2911 on a frame-by-frame basis, and outputs the frame image data according to the characteristics and size of the display unit 2915.

The image processing unit 2913 includes an image codec and compresses the frame image data displayed on the display unit 2915 in a predetermined manner or restores the compressed frame image data into original frame image data . The image codec may be a joint photographic experts group (JPEG) codec, a moving picture experts group 4 (MPEG4) codec, a wavelet codec, or the like. The image processing unit 2913 is assumed to have an on-screen display (OSD) function and can output on-screen display data according to the screen size controlled by the controller 2917. [

The display unit 2915 displays a video signal output from the video processing unit 2913 on the screen and displays user data output from the controller 2917. Here, the display unit 2915 may include a liquid crystal display (LCD), and in this case, the display unit 2915 may include an LCD controller, A memory capable of storing data, an LCD display device, and the like. Here, when the LCD is implemented by a touch screen method, the LCD may function as an input unit, and the display unit 2915 may display keys such as the key input unit 2927.

When the display unit 2915 is implemented with the touch screen, the display unit 2915 may output an analog signal corresponding to at least one user input to the user graphic interface to the controller 2917.

The display unit 2915 may receive at least one user input through the user's body (e.g., a finger including a thumb) or the key input unit 2927 (e.g., a stylus pen, an electronic pen).

The display unit 2915 may receive a continuous movement of one touch (e.g., a drag input). The display unit 2915 can output the analog signal corresponding to the continuous movement of the input touch to the controller 2917.

The touch is not limited to the touch of the touch screen, that is, the touch of the display unit 2915 with the finger or the key input unit 2927, and the touch may be performed in a non-contact (for example, (For example, when the user input means is located within a recognition distance (for example, 1 cm) at which the means can be detected). The distance or interval at which the user input means can be recognized by the display unit 2915 may be changed according to the performance or structure of the UE 2900. Particularly, A value detected by the direct touch event and a hovering event (including a voltage value or a current value, for example) is differently output so that the touch event and the indirect touch event (i.e., hovering event) Lt; / RTI >

The display unit 2915 may be implemented by a resistive method, a capacitive method, an infrared method, an acoustic wave method, or a combination thereof.

The display unit 2915 includes at least two touch panels capable of sensing the touch and the approach of the finger and the key input unit 2927 so as to receive input by the finger and the key input unit 2927, can do. At least two touch panels provide different output values to the controller 2917 and the controller 2917 recognizes different values input from the at least two touch screen panels and outputs them from the key input unit 2927 The input by the finger or the input by the key input unit 2927 can be distinguished.

The controller 2917 converts the analog signal inputted from the display unit 2915 into a digital signal and the controller 2917 can control the display unit 2915 using the digital signal. In one example, the controller 2917 may cause a shortcut icon (not shown separately in Figure 29) or an object displayed in the controller 2917 to be selected or executed in response to a direct touch event or a hovering event.

The controller 2917 detects a value (e.g., a current value) output through the display unit 2915 to determine a hovering interval or distance as well as a user input position, and outputs the determined distance value as a digital signal For example, the Z coordinate). The controller 2917 may detect a pressure that the user input means presses the display unit 2915 by detecting a value (e.g., a current value) output through the display unit 2915, The pressure value can also be converted to a digital signal.

29, the UE 2900 is connected to the camera processing unit 2911, the image processing unit 2913, the display unit 2915, the controller 2917, the RF processing unit 2919, The UE 2900 is implemented as separate units such as the data processing unit 2921, the memory 2923, the audio processing unit 2925 and the key input unit 2927. However, The camera 2911, the image processor 2913, the display 2915, the controller 2917, the RF processor 2919, the data processor 2921, the memory 2923, And at least two of the audio processing unit 2925 and the key input unit 2927 may be integrated.

Alternatively, the UE 2900 may be implemented as a single processor.

29 illustrates an example of an internal structure of a UE in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention. Referring to FIG. 30, Another example of the internal structure of the UE in the wireless communication system using the scheme will be described.

30 is a diagram schematically showing another example of the internal structure of a UE in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention.

Referring to FIG. 30, a UE 3000 includes a transmitter 3011, a controller 3013, a receiver 3015, and a storage unit 3017.

First, the controller 3013 controls the overall operation of the UE 3000 and transmits and receives signals in a wireless communication system using the SWSC MIMO scheme according to an exemplary embodiment of the present invention. In order to enable the generation of a desired achievable rate region based on the CQI, the CSI, the PMI, the QoS, and the number of antennas included in the feedback message received from the UE, the number of streams and the sliding- A QAM modulation layer structure according to the structure of the sliding-window superposition coding layer, a QAM modulation layer structure, and a beamforming matrix for transmitting each SWSC superposition layer. do. In the wireless communication system using the SWSC MIMO scheme according to an exemplary embodiment of the present invention, an operation of transmitting and receiving a signal, in particular, a CQI, a CSI, a PMI, a QoS The number of streams, the structure of the sliding-window superposition coding layer, the number of streams and the QAM combination according to the structure of the sliding-window superposition coding layer, QAM modulation layer, and a beamforming matrix for transferring each SWSC superposition layer are the same as those described with reference to FIGS. 1 to 27, detailed description thereof will be omitted. In addition, the combination of QAM according to the number of streams and the structure of the sliding-window superposition coding layer can be implemented based on a mapping method. Since the mapping method has been described in detail above, detailed description thereof will be omitted .

The transmitter 3011 transmits various signals and various messages to other devices included in the wireless communication system using the SWSC MIMO scheme, for example, a base station, under the control of the controller 3013. Here, the various signals and various messages transmitted by the transmitter 3011 are the same as those described with reference to FIG. 1 to FIG. 27, and thus detailed description thereof will be omitted.

In addition, the receiver 3015 receives various signals and various messages from a BS, etc., included in the wireless communication system using the SWSC MIMO scheme, under the control of the controller 3013. Here, various signals and various messages received by the receiver 3015 are the same as those described with reference to FIG. 1 to FIG. 27, and therefore, detailed description thereof will be omitted here.

The storage unit 3017 transmits and receives signals in a wireless communication system supporting the SWSC MIMO scheme according to an embodiment of the present invention performed by the UE 3000 under the control of the controller 3013, In particular, in order to enable the base station to generate a desired achievable rate region based on the CQI, the CSI, the PMI, the QoS, and the number of antennas included in the feedback message received from the UE, a superposition coding layer, a QAM combination according to the number of streams, a sliding-window superposition coding layer structure, a QAM modulation layer structure, and a beamforming matrix for transmitting each SWSC superposition layer And stores programs and various data related to the operation.

The storage unit 3017 stores various signals and various messages received by the receiver 3015 from the base station or the like.

30 shows a case where the UE 3000 is implemented as separate units such as the transmitter 3011, the controller 3013, the receiver 3015, and the storage unit 3017, It is needless to say that at least two of the transmitter 3011, the controller 3013, the receiver 3015 and the storage unit 3017 may be integrated in the UE 3000.

In addition, the UE 3000 may be implemented as a single processor.

30 shows another example of the internal structure of a UE in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention. Referring to FIG. 31, Another example of the internal structure of the base station in the wireless communication system using the method will be described.

31 is a diagram schematically illustrating another example of the internal structure of a base station in a wireless communication system using an SWSC MIMO scheme according to an embodiment of the present invention.

31, the base station 3100 includes a transmitter 3111, a controller 3113, a receiver 3115, and a storage unit 3117.

First, the controller 3113 controls the overall operation of the BS 3100 and transmits and receives signals in a wireless communication system supporting the SWSC MIMO scheme according to an embodiment of the present invention. In order to enable the generation of a desired achievable rate region based on the CQI, the CSI, the PMI, the QoS, and the number of antennas included in the feedback message received from the UE, the number of streams and the sliding- A QAM modulation layer structure according to the structure of the sliding-window superposition coding layer, a QAM modulation layer structure, and a beamforming matrix for transmitting each SWSC superposition layer. do. In the wireless communication system supporting the SWSC MIMO scheme according to an exemplary embodiment of the present invention, an operation of transmitting and receiving a signal, in particular, a CQI, a CSI, a PMI, a QoS The number of streams, the structure of the sliding-window superposition coding layer, the number of streams and the QAM combination according to the structure of the sliding-window superposition coding layer, QAM modulation layer, and a beamforming matrix for transferring each SWSC superposition layer are the same as those described with reference to FIGS. 1 to 27, detailed description thereof will be omitted. In addition, the combination of QAM according to the number of streams and the structure of the sliding-window superposition coding layer can be implemented based on a mapping method. Since the mapping method has been described in detail above, detailed description thereof will be omitted .

Under the control of the controller 3113, the transmitter 3111 transmits various signals and various messages to other devices included in the wireless communication system using the SWSC MIMO scheme, for example, a UE. Here, the various signals and various messages transmitted by the transmitter 3111 are the same as those described with reference to FIG. 1 to FIG. 27, and a detailed description thereof will be omitted here.

Also, the receiver 3115 receives various signals and various messages from UEs included in the SWSC MIMO wireless communication system under the control of the controller 3113. Here, detailed description will be omitted here. The storage unit 3117 controls the control of the controller 3113 (see FIG. 1) In the wireless communication system supporting the SWSC MIMO scheme according to an exemplary embodiment of the present invention performed by the base station 3100 according to an embodiment of the present invention, In order to make it possible to generate a desired achievable rate region based on CQI, CSI, PMI, QoS and number of antennas, the number of streams, the structure of a sliding-window superposition coding layer, The combination of QAM according to the structure of the superposition coding layer, the structure of the QAM modulation layer, and the beamforming matrix for each SWSC superposition layer are determined And various data and the like related to the operation related to the operation for making it possible to perform the operation.

The storage unit 3117 stores various signals and various messages received by the receiver 3115 from the UE and the like.

31 shows a case where the base station 3100 is implemented as separate units such as the transmitter 3111, the controller 3113, the receiver 3115, and the storage unit 3117, It is needless to say that the base station 3100 can be implemented by integrating at least two of the transmitter 3111, the controller 3113, the receiver 3115 and the storage unit 3117.

In addition, the base station 3100 may be implemented as a single processor.

Certain aspects of the invention may also be implemented as computer readable code in a computer readable recording medium. The computer readable recording medium is any data storage device capable of storing data that can be read by a computer system. Examples of the computer-readable recording medium include a read-only memory (ROM), a random-access memory (RAM), CD-ROMs, magnetic tapes , Floppy disks, optical data storage devices, and carrier waves (such as data transmission over the Internet). The computer readable recording medium may also be distributed over networked computer systems, and thus the computer readable code is stored and executed in a distributed manner. Also, functional programs, code, and code segments for accomplishing the present invention may be readily interpreted by programmers skilled in the art to which the invention applies.

It will also be appreciated that the apparatus and method according to an embodiment of the present invention may be implemented in hardware, software, or a combination of hardware and software. Such arbitrary software may be stored in a memory such as, for example, a volatile or non-volatile storage device such as a storage device such as ROM or the like, or a memory such as a RAM, a memory chip, a device or an integrated circuit, , Or a storage medium readable by a machine (e.g., a computer), such as a CD, a DVD, a magnetic disk, or a magnetic tape, as well as being optically or magnetically recordable. The method according to an embodiment of the present invention can be implemented by a computer or a mobile terminal including a control unit and a memory and the memory is suitable for storing a program or programs including instructions embodying the embodiments of the present invention It is an example of a machine-readable storage medium.

Accordingly, the invention includes a program comprising code for implementing the apparatus or method as claimed in any of the claims herein, and a storage medium readable by a machine (such as a computer) for storing such a program. In addition, such a program may be electronically transferred through any medium, such as a communication signal carried over a wired or wireless connection, and the present invention appropriately includes equivalents thereof

Also, an apparatus according to an embodiment of the present invention may receive and store the program from a program providing apparatus connected by wire or wireless. The program providing apparatus includes a memory for storing a program including instructions for causing the program processing apparatus to perform a predetermined content protection method, information necessary for a content protection method, and the like, and a wired or wireless communication with the graphics processing apparatus And a control unit for transmitting the program to the transceiver upon request or automatically by the graphic processing apparatus.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

Claims (36)

A method of operating a transmitting device in a wireless communication system,
Detecting an achievable rate region for a receiving device;
A modulation and coding scheme (MCS) level and a sliding window superposition coding (SWSC) multi-input multi-output (MIMO) scheme corresponding to the achievable rate region are determined , ≪ / RTI >
Wherein the achievable rate region is determined based on a precoding matrix generated based on a channel matrix between each of the transmission apparatuses other than the transmission apparatus and the transmission apparatus and the reception apparatus. .
The method according to claim 1,
Wherein the step of determining the SWSC MIMO scheme comprises:
And determining a structure of a sliding-window superposition coding layer used in the SWSC MIMO scheme in the wireless communication system.
3. The method of claim 2,
Wherein the step of determining the SWSC MIMO scheme comprises:
Further comprising the step of determining a combination of modulation schemes according to the sliding-window superposition coding layer.
The method of claim 3,
Determining a modulation scheme combination according to the sliding-window superposition coding layer comprises:
Determining a combination of modulation schemes based on the number of sliding-window superposition coding layers used in the SWSC MIMO scheme, the number of antennas used in the transmitter, and the number of bits included in modulation symbols according to the modulation scheme Further comprising the steps of: receiving a radio signal from the base station;
The method of claim 3,
Wherein the step of determining the SWSC MIMO scheme comprises:
Further comprising the step of determining a modulation layer for the modulation scheme. ≪ RTI ID = 0.0 > 31. < / RTI >
5. The method of claim 4,
Wherein the step of determining the SWSC MIMO scheme comprises:
Further comprising the step of determining a beamforming matrix that carries an SWSC superposition layer signal. ≪ Desc / Clms Page number 19 >
7. The method according to any one of claims 3 to 6,
Wherein the modulation scheme is a quadrature amplitude modulation (QAM) scheme.
The method according to claim 1,
Further comprising the step of transmitting information on the determined SWSC MIMO scheme to the receiving apparatus.
The method according to claim 1,
The process of detecting an achievable rate region for the receiving apparatus comprises:
A channel quality indicator (CQI), a channel state information (CSI), a precoding matrix indicator (PMI), and a quality of service (CSI) And detecting an achievable rate region of the receiving apparatus based on at least one of the QoS and the QoS.
A method of operating a receiving device in a wireless communication system,
Receiving a signal from a transmitting apparatus,
The signal may comprise at least one of a modulation and coding scheme (MCS) level and a sliding window superposition coding (SWSC) multiplexing mode corresponding to an achievable rate region for the receiving apparatus. A signal transmitted based on a massive multi-input multi-output (MIMO) scheme,
Wherein the achievable rate region is determined based on a precoding matrix generated based on a channel matrix between each of the transmission apparatuses other than the transmission apparatus and the transmission apparatus and the reception apparatus. .
11. The method of claim 10,
The SWSC MIMO scheme includes:
Wherein the method is determined based on a structure of a sliding window superposition coding layer used in the SWSC MIMO scheme.
12. The method of claim 11,
The SWSC MIMO scheme includes:
And determining a modulation scheme based on the sliding-window superposition coding layer.
13. The method of claim 12,
Wherein the modulation scheme combination according to the sliding-window superposition coding layer comprises:
Wherein the number of sliding-window superposition coding layers used in the SWSC MIMO scheme, the number of antennas used in the transmitting apparatus, and the number of bits included in the modulation symbols according to the modulation scheme are determined. A method of operating a receiving device in a system.
13. The method of claim 12,
The SWSC MIMO scheme includes:
Wherein the modulation scheme is determined based on a modulation layer of the modulation scheme.
14. The method of claim 13,
The SWSC MIMO scheme;
Wherein the method is determined based on a beamforming matrix that carries an SWSC superposition layer signal.
16. The method according to any one of claims 12 to 15,
Wherein the modulation scheme is a quadrature amplitude modulation (QAM) scheme.
11. The method of claim 10,
Further comprising the step of receiving information on the SWSC MIMO scheme from the transmitting apparatus.
11. The method of claim 10,
The achievable rate region for the receiving device is:
A channel quality indicator (CQI), a channel state information (CSI), a precoding matrix indicator (PMI), and a quality of service quality of service (QoS) of a wireless communication system.
A transmitting apparatus in a wireless communication system,
Comprising the steps of: detecting an achievable rate region for a receiving device; determining a modulation and coding scheme (MCS) level and a sliding window superposition coding (SWSC) corresponding to the achievable rate region; ) Multi-input multi-output (MIMO) scheme, the method comprising:
Wherein the achievable rate region is determined based on a precoding matrix generated based on a channel matrix between each of the transmission apparatuses other than the transmission apparatus and the transmission apparatus and the reception apparatus.
20. The method of claim 19,
Wherein the determining the SWSC MIMO scheme comprises:
And determining a structure of a sliding window superposition coding layer used in the SWSC MIMO scheme.
21. The method of claim 20,
Wherein the determining the SWSC MIMO scheme comprises:
Further comprising determining a combination of modulation schemes according to the sliding-window superposition coding layer.
22. The method of claim 21,
Determining a modulation scheme combination according to the sliding-window superposition coding layer comprises:
Determining a combination of modulation schemes based on the number of sliding-window superposition coding layers used in the SWSC MIMO scheme, the number of antennas used in the transmitting apparatus, and the number of bits included in the modulation symbols according to the modulation scheme And a transmitting unit for transmitting the data to the transmitting apparatus.
22. The method of claim 21,
Wherein the determining the SWSC MIMO scheme comprises:
Further comprising determining a modulation layer for the modulation scheme in the wireless communication system.
24. The method of claim 23,
Wherein the determining the SWSC MIMO scheme comprises:
Further comprising determining a beamforming matrix that carries an SWSC superposition layer signal. ≪ Desc / Clms Page number 13 >
25. The method according to any one of claims 21 to 24,
Wherein the modulation scheme is a quadrature amplitude modulation (QAM) scheme.
20. The method of claim 19,
Wherein the processor transmits information on the determined SWSC MIMO scheme to the receiving apparatus.
20. The method of claim 19,
Detecting an achievable rate region for the receiving device comprises:
A channel quality indicator (CQI), a channel state information (CSI), a precoding matrix indicator (PMI), and a quality of service (CSI) And detecting an achievable rate region for the receiving apparatus based on at least one of the quality of service (QoS).
A receiving apparatus in a wireless communication system,
A processor for receiving a signal from a transmitting device,
The signal may comprise at least one of a modulation and coding scheme (MCS) level and a sliding window superposition coding (SWSC) multiplexing mode corresponding to an achievable rate region for the receiving apparatus. A signal transmitted based on a massive multi-input multi-output (MIMO) scheme,
Wherein the achievable rate region is determined based on a precoding matrix generated based on a channel matrix between each of the transmission apparatuses other than the transmission apparatus and the transmission apparatus and the reception apparatus.
29. The method of claim 28,
The SWSC MIMO scheme includes:
Wherein the determination is based on a structure of a sliding window superposition coding layer used in the SWSC MIMO scheme.
30. The method of claim 29,
Wherein the modulation scheme combination according to the sliding-window superposition coding layer comprises:
Wherein the number of sliding-window superposition coding layers used in the SWSC MIMO scheme, the number of antennas used in the transmitting apparatus, and the number of bits included in the modulation symbols according to the modulation scheme are determined. Receiver in the system.
30. The method of claim 29,
The SWSC MIMO scheme includes:
And determining a modulation scheme combination according to the sliding-window superposition coding layer.
31. The method of claim 30,
The SWSC MIMO scheme includes:
Wherein the modulation scheme is determined based on a modulation layer of the modulation scheme.
33. The method of claim 32,
The SWSC MIMO scheme;
Wherein the determination is based on a beamforming matrix that carries an SWSC superposition layer signal.
34. The method according to any one of claims 30 to 33,
Wherein the modulation scheme is a quadrature amplitude modulation (QAM) scheme.
29. The method of claim 28,
Wherein the processor receives information on the SWSC MIMO scheme from the transmission apparatus.
29. The method of claim 28,
The achievable rate region for the receiving device is:
A channel quality indicator (CQI), a channel state information (CSI), a precoding matrix indicator (PMI), and a quality of service quality of service (QoS) of a wireless communication system.

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