TW201126945A - Method for setting precoder in open loop MIMO system - Google Patents

Abstract

A feedback method of a user equipment in an open loop Multiple-Input Multiple-Output (MIMO) system is disclosed. The method includes, receiving one of a plurality of modes determined according to types of resources to be used for performing feedback from a base station, and selecting a precoding matrix from a codebook subset corresponding to the received mode, applying the selected precoding matrix, and transmitting feedback information. Different codebook subsets are configured with respect to the plurality of modes, and the codebook subset is configured by extracting a predetermined number of elements from a base codebook based on a predetermined criterion considering the characteristics of the modes.

Description

201126945 VI. INSTRUCTIONS: The present invention claims the Korean Patent Application No. 1〇2〇〇9〇〇677〇8, the benefit of the application filed on July 24, 2009, which is incorporated herein by reference in its entirety. Reference. The present invention also claims the benefit of the filing of the application in the U.S. Provisional Application Serial No. 61/173,983, filed on Apr. 30, 2009, which is hereby incorporated by reference in its entirety. TECHNICAL FIELD OF THE INVENTION The present invention relates to a honeycomb system (celluUr (10)), and more particularly. A method for setting a precoder in a multi-input multi-output system. [Prior Art] First, the multiple input multiple output (MIMO) technique to which the present invention is applied will be briefly described herein. The scheme 0 refers to a scheme in which a plurality of transmitting antennas and a plurality of receiving antennas are used in order to improve the efficiency of data transmission/reception, which is distinguished from the conventional scheme of using one transmitting antenna and one receiving antenna. That is, in the ΜΙΜΟ system, in order to receive a collection of antennas through several antennas instead of using a single antenna path. The technique of combining fragments is applied. According to the ΜΙΜΟ technology, the data transfer rate can be improved in the range of 拉, or a system range relative to a specific data transfer rate can be increased. 4 201126945 That is, the ΜΙΜΟ technology is a next-generation mobile communication technology that can be widely used in a user equipment (UE), a repeater, and the like for mobile communications. This technology attracts considerable attention, and this technology can overcome the limitations of the transmission size of mobile communications due to the expansion of data communication. Figure 1 is a diagram showing the configuration of a general system. As shown in Figure 1, if the number of transmitters and the number of receivers increase simultaneously, the channel transmission capacity is theoretically proportional to the number of antennas' and the multiple antennas are used for only one transmitter or receiver. The situation is different. Therefore, the frequency efficiency is significantly improved. After the theoretical capacity increase of the helium system was confirmed in the mid-1990s, research on various technologies capable of substantially improving the data transmission rate has been actively carried out until today. Among them, some technologies have been applied to various wireless communication standards for third-generation mobile communication and a next-generation wireless local area network (LAN). Various studies related to ΜΙΜΟ technology, such as theoretical research on information related to ΜΙΜ0 communication capacity consumption in various channel environments and multiple access environments, research on radio channel measurement, and model derivation of ΜΙΜ〇 system, Research on space-time signal processing techniques for improving a transmission rate and improving transmission reliability has been actively conducted. The technique can be divided into a spatial diversity scheme that uses the same symbols across various channel paths for increased transmission reliability, and a one-to-two multiplexing scheme that uses multiple transmit antennas for simultaneous transmission of multiple different Data symbols to improve the transmission rate. Moreover, a method of fully combining these schemes to obtain respective advantages has recently been made. 201126945 In general, in a system that allows a MIMO mode, since a spatial resource has been added, the UI mode is divided into a single user MIM ( su_MIM〇) mode and a multi-user depending on how the spatial resource is allocated. MIMO (MU-MIMO) mode. Figure 2 is a diagram showing the construction of a transmitter's next-line μμμ〇 system. As shown in Fig. 2, an encoder 2〇1 maps the LU1) hierarchy to the HUL) stream. The streams are input to a precoding buffer 202. The stream is defined by the encoding and the modulation path, and the stream is defined by an output of the ΜΙΜΟ encoder 201 of the precoder 202. Precoder 202 generates a particular antenna data symbol' based on a selected chirp pattern to map the stream to the antenna. The secondary carrier mapper 203 maps the specific antenna data to the 〇fdm symbol. Mapping the hierarchy to the stream is performed by Μ·coding $ 2〇1. The Curry Encoder 201 is capable of processing a batch of solid input symbols at the same time. The input to the encoder 20! can be represented by a Μχΐ vector as shown in the equation}. Equation 1 hi

LM in Equation 1 + ’ Si represents the third input in the batch process 6 201126945 Symbol. The hierarchy of the input symbol to the stream is mapped in the -space domain. First, the rotation of the M_encoder 2〇1 can be seen by Equation 2. A miXNf MIM0 spatial time coding (st(7) matrix is represented. Inequality 2 X = S(s) At this time, Μ, represents the number of streams, and NF represents the number of subcarriers occupied by one ΜΙΜΟ block" 〇 Encoder 2〇1 output, s represents an output hierarchy vector, and S(4) represents the —STC matrix.

R In a SU-.MIMO transmission, Equation 4 Μ STC rate is defined by Equation 4

X * X 3 is represented by a matrix shown in the equation: } Xj2 ... X^.nf ^,1 • _ _ X2,2 ... • · 1 · X2Mf • • Xw · Called, 2 _ A MU-MIMO value sample tb. The STC rate of the 'parent level' is 1. For example, in the form of an encoder 21〇, spatial frequency block code (SFBC) coding, vertical coding (), and horizontal coding (ηε) can be used. The input to the 〇ιμ〇 encoder 2〇1 in SFBC coding can be represented by a 2x1 vector shown in Equation 5. Equation 5 201126945 S = _S2^ The ΜΙΜΟ encoder 201 produces the _sfbc matrix shown in Equation 6. Equation 6 X = 2 At this time, X represents a 2x2 matrix, and an SFBC matrix X occupies two consecutive subcarriers. The input and output of the 'ΜΙΜΟ encoder 201 in VE are represented by an Mxl vector shown in Equation 7. Equation 7

V square 2 X = S = At this point, Si represents the ith input symbol in a batch process, and si...sM belong to the same level relative to VE. In the HE, the input and output of the ΜΙΜΟ encoder 201 are represented by a Μχ 1 vector shown in Equation 8. Equation 8 •^2 X = S =

C 8 201126945 At this point, Si represents the ith input symbol in a batch process, and S1...SM belong to different levels relative to HE. A method of mapping a stream to an antenna will now be described in detail. The mapping of the stream to the antenna is performed by the precoder 202. The output of the mim〇 encoder 201 is multiplied by w of the NtxMt precoder. The output of the precoder is represented by an NtxNF matrix z. The method of mapping a stream to an antenna is represented by Equation 9. Equation 9 ~zu Zl,2 _ · · 7 z = Wx = Z2,l • _ Ζ2,2 9 • • _ · *7 · • _ _ΖΛΓ"1 ZNt,l • · « 7 At this point, Nt stands for transmission The number of antennas and Zj,k represents the -output symbol transmitted over the kth secondary carrier through the jth physical antenna. The precoding methods applied include __non-adaptive precoding methods and adaptive precoding methods. In the non-adaptive precoding method, the "precoding matrix system - 矩阵 matrix W (k). At this time, Nt represents the number of transmitting antennas, Mt represents the number of streams, and k represents the _ entity index of the _subcarrier to which w(k) is applied. The matrix w is selected from a subset of a precoder having a base coded thin size Nw for a given rank. According to the equation ig, the matrix 1 is changed in the interval of successive physical sub-cuts and the matrix W is not attached to the number of sub-sfl frames. The NtxMt precoding matrix of the application-&', _human carrier k is selected from the open-loop coded thin subset of the rank-rank 作为 as a 201126945 codeword of an index i. At this time, i is given by Equation 10. Equation 10 / = mod ([ k )] -1,^) + 1 In an open loop range, except for the DC secondary carrier and the guarded secondary carrier, the matrix W is Ν, Ρπ is an interval of consecutive physical subcarriers Was changed. A default value of N is Ν, N2 is not required, and the use of N2 does not require additional signaling. On the contrary, in the adaptive precoding method, the matrix is obtained from the feedback of a UE. Precoding based on codebook (codebook feedback) includes three feedback modes, namely a basic mode, an adaptive mode, and a differential mode. In time division duplex (TDD) sound based precoding, the value of the matrix W is obtained from the UE's sound feedback. Several downlink ΜΙΜΟ modes can be presented and are shown in Table 1. Table 1 Mode index description reference mode 0 OL SU-MIMO (SFBC with non-adaptive precoder) Mode 1 OLSU-MIMO (SM with non-adaptive precoder) Mode 2 CL SU-MIMO (with adaptive pre- Encoder's SM) Mode 3 OL SU-MIMO (SM with Non-Adaptable Precoder) Mode 4 CL SU-MIMO (SM with Adaptive Precoder) Mode 5-7 n/a N/a 201126945 In SU-ΜΙΜΟ, a resource unit (RU) is assigned to a user, and a forward error correction (FEC) block is presented in an input of the 编码 encoder 210 (this is perpendicular to a transmitter) ΜΙΜΟ The code corresponds to). In vertical ΜΙΜΟ encoding, all data streams transmitted through several antennas are generated from a user information bit to pass through the same FEC block. Meanwhile, in MU-MIMO, one RU can be allocated to a plurality of users, and a plurality of FEC blocks are presented in an input of the ΜΙΜΟ encoder 201 (this corresponds to horizontal ΜΙΜΟ encoding). In horizontal 编码 coding, different symbols transmitted through several antennas are generated from different information bits to pass through different FEC blocks and modulation blocks. In general, if the number of users is small, the SU-ΜΙΜΟ performance is good, and if the number of users is large, the MU-MIMO performance is good. Each of SU-ΜΙΜΟ and MU-MIMO is divided into Closed Loop ΜΙΜΟ (CL-MIMO) and Open Loop ΜΙΜΟ (OL-MIMO) » Although the ΜΙΜΟ technique is applied based on information about the state of a channel established between a UE and a base station in the CL-MIMO technology, When there is a limitation in the feedback information due to a high speed action in the OL-MIMO technology, the technique is applied for the purpose of diversity gain.

Sub-channelization of Ieee 802.16m includes two modes. The first is a regional mode in which a sub-band contiguous resource unit (CRU) is typically used, and the second is a diversity mode in which a decentralized resource unit (DRU) is typically used. A mini-band CRU can be used in both regional and diversity modes. 201126945 Although the sub-channelization includes several modes, the pre-coding matrix is used instead of the mode. Since it is not considered that the general precoding matrix should be used according to the characteristics of the resources allocated by the wedge, the modes of a precoding matrix may not be improved. SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a method for setting a precoder in an open-loop 〇 system that substantially obviates one or more problems due to limitations and disadvantages of the related prior. One aspect of the present invention provides an application of an optimized precoding matrix based on the type of allocated resources. Additional benefits, aspects, and features of the invention are set forth in part in the description which follows. The objectives and other benefits of the present invention will be understood and appreciated by the written description and the scope of the application and the particular structure of the accompanying drawings. In order to achieve such aspects and other benefits and in accordance with the purpose of the present invention, as used herein and broadly described, a user equipment feedback method in an open loop multiple input multiple output (ΜΙΜΟ) system includes: The base station receives one of a plurality of modes determined according to a type of resource to be used for performing feedback; and selects a precoding matrix corresponding to the received pattern from a subset of codebooks, applying the selected Pre-12 201126945 4 code matrix, and transmit feedback f, wherein different coded thin subsets are set relative to the same pattern * g£, and the code set is based on one, based on the codebook The pre-determined criteria of the features of the modes are configured by extracting a predetermined number of elements. In another aspect of the present invention, a method for allocating resources to a user equipment in an open loop multiple input multiple output (ΜΙΜΟ) system includes: when the user equipment transmits feedback information, at the base station Notifying the user of the type of resource used by the user, the mode & the type of resource to be used; receiving the feedback - the code of the pattern selected from the subset of the _coded subset - (four) code a matrix is applied to the feedback information; and the received back (four) message is used to allocate the resources to the user equipment, and the different codes (4) (4) of the towel are configured relative to the plurality of modes, and the code material (4) is borrowed A predetermined number of elements are extracted from the _ basic codebook based on pre-determined criteria that take into account the features of the patterns. In another aspect of the present invention, an open circuit multiple input multiple output (circular) system "in the user equipment for transmitting feedback information includes: - a receiving unit configured to be a slave base station Receiving one of a plurality of modes determined according to a type of resource to be used for performing feedback - the processing unit 'configured to select a precoding matrix corresponding to the connected (four) mode from the -coded thin subset, the application Selecting the precoding matrix, and generating the feedback information, and the transmitting unit is configured to generate the generated back information, wherein the receiving unit, the processing unit and the transmitting unit selectively connect the different encodings The thin subset is configured relative to the plurality of patterns of 13 201126945, and the coded thin subset is extracted by a predetermined number based on a predetermined criterion that takes into account the characteristics of the patterns from a basic codebook The plurality of modes may include an area mode and a diversity mode, and when transmitted in the area mode, a sub-band adjacent resource unit (cru) may be used as a logic a resource unit, and when transmitted in the diversity mode, a decentralized resource unit (DRU) or a mini-band based cRU can be used as a logical resource unit. 'A coded thin subset corresponding to the regional pattern can be borrowed It is configured by a predetermined number of elements from the base code, the elements satisfying a constant modulus characteristic.

One chord. Thin extraction

An improved type of precoder is improved.

The detailed description is to be construed as illustrative and illustrative, and the description of the claims The following embodiments are in accordance with a preferred embodiment, examples of which are attached

It is proposed by combining the constituent components and features of the present invention 14 201126945. Individual constituent components or features should be considered as non-essential factors without additional annotation. Individual constituent components or features may not be combined with other components or features, if desired. Moreover, certain constituent components and/or features may be combined to carry out embodiments of the invention. The sequence of operations disclosed in the embodiments of the present invention may be arranged. Certain components or features of any embodiment may also be included in other embodiments or may be substituted by other embodiments as appropriate. In the description of the drawings, procedures or steps that obscure the scope of the present invention are omitted, and the procedures or steps that can be understood by those skilled in the art will be omitted. It is to be understood that the specific terms disclosed in the present invention are set forth in the <RTIgt; First, resources for use in a wireless mobile communication system will be explained. In a wireless mobile communication system, resources are generally divided into a first partition and a second partition. The first partition is suitable for obtaining diversity by distributing resources allocated to an actual physical band according to frequency. The second partition is beneficial to a user who has a relatively good channel by arranging resource continuity based on frequency. For example, in a practical example, in the case of IEEE 802 16e, the former provides partial use (PUSC) or sub-channel use (FUSC) as a secondary channel, and the latter serves as a band adaptive modulation and coding scheme (AMC). . Meanwhile, in the case of IEEE 802.16m, the former is divided by a decentralized 15 201126945 resource unit (DRU), and the latter is divided by a contiguous resource unit (CRU), both of which can exist simultaneously in one subframe. in. A physical resource unit (PRU) is a basic entity unit for resource allocation, and a logical resource unit (LRU) is a basic logical unit. DRU and CRU belong to LRU. The DRU includes a primary carrier group that is interspersed among the dispersed resource allocation bands in a frequency separation. The CRU includes a group of adjacent subcarriers in all resource allocation bands. Figure 3 is a diagram illustrating a procedure for mapping PRUs to LRUs. Hereinafter, a procedure for mapping PRUs to LRUs will be described with reference to FIG. As shown in Fig. 3, first, PRUs are divided into subband-based PRUs and miniband-based PRUs. In Fig. 3, the subband based PRU is represented by PRUSB and the miniband based PRU is represented by PRUMB. PRUSB is suitable for frequency selective allocation because PRUs are continuously assigned on a frequency axis. In addition, PRUMB is suitable for frequency diversity allocation and is arranged on a frequency axis. The PRUSB is mapped to the CRU, and the CRU mapped to the PRUSB is defined as a sub-band based CRU. The PRUMB is mapped to the DRU through a permutation procedure (in Figure 3, the arranged PRUMB is represented by PPRUMB). At this point, some PPRUmbs are mapped to CRUs, and the CRUs mapped to PPRUmb are defined as a miniband based CRU. Further, a resource band is actually allocated to a UE corresponding to any one of a sub-band based CRU, a mini band based CRU or a DRU. In the case of a rapidly moving UE, it is advantageous to allocate resources to 16 201126945 UEs using DRUs or mini-band based CRUs due to rapid channel state changes. Therefore, in this case, it is preferable that the resource is allocated to the UE using dru or a mini-band based CRU. In the case where a UE is in a well-changing and slowly changing environment of a channel, it is preferable that resources are allocated to the UE using sub-band based CRUs. In the case of IEEE 802.16m, subchannelization can be divided into a regional mode and a diversity mode. In general, subband based CRUs are allocated and used in regional mode, and DRUs are allocated and used in diversity mode. In addition, mini-band CRUs can be used in regional mode or diversity mode. That is, the type of resource used varies depending on the regional mode and the diversity mode. Furthermore, if multiple resource elements are allocated to the UE in the case of mini-band Cru, it should generally be assumed to be a diversity mode. Therefore, using the same precoding matrix regardless of the mode depending on system performance is not good. The present invention proposes a method of configuring different code subsets according to the regional mode and the diversity mode to optimize system performance. In order to explain the method of configuring the code subset according to the mode optimization, it is assumed that C(Nt, Mt, Nw) represents a codebook, Nt represents the number of transmit antennas, Mt represents the number of streams, and Nw represents a coded code. The number of words. When a codebook used in the regional mode is c J〇caUzed(Nt, Mt, Nwl) 'a channel quality indicator (cqj) or modulation and coding scheme (mcS) level can be set to assume that the transmission uses c_1〇 Calized (Nt, Mt, Nwi) and 荨 10 are implemented, or it is assumed that precoding uses the above coded thin and real 17 201126945 lines. Here, Nt represents the number of transmitting antennas, Mt represents the number of streams, and Nwl represents the number of bits used in the precoding matrix included in this mode of the coding thinning" In order to apply a good performance in the regional mode The precoding matrix, Cj〇caHzed(Nt, Mt, Nwl) used in the regional mode can be extracted from a CL_MIM〇 basic coding thine by using the same codebook as a CL-MIMO basic coding thin, or according to predetermined criteria. Configured with a precoding matrix. At this time, in order to configure C-localized (Nt, Mt, Nwl), as a criterion for extracting a precoding matrix from the CL-MIMO coding thin, for example, it is possible to extract only a constant modulus characteristic from the CL-MIMO basic coding thin. The criteria for the elements. In the diversity mode, a CQI or MCS level can be set to be implemented on the assumption that the transmission uses C-diversity (Nt, Mt, Nw2) and Equation 1, or that precoding is performed using this method. Here, Nw2 represents the number of bits of the precoding matrix included in this mode of the codebook. Nw 1 and Nw2 may be different from each other. When it is assumed that u(Nt, M) is an NtxM unit matrix and wi and W2 are elements of u(Nt, M), a chord as shown in the equation η can be defined. Equation 11 d(\\· .w2) = - w2&lt; A criterion for configuring the codebook C_diversity(Nt, Mt, Nw2) used in the diversity mode is selected by selecting a precoding matrix for maximizing the string 201126945 because The largest type of chord is the matrix of coded thin distances in the successful mode of operation. The matrix can be selected from CL_MlM〇. The representation indicates that the matrix presented in the codebook_ is relative to each other, which can be used as a criterion for selectively configuring a precoding matrix for diversity. Hereinafter, a method of extracting a coding matrix from a basic coding thin to configure a coded thin subset according to a mode in which the number of transmission antennas of the mode is 4 and a rank system is 2 will be described. Table 2 shows the basic CL_MIM 〇 codebook for configuring the thin subset based on the diversity mode and the regional mode. Table 2 201126945 liulcx m CW;i6.»i)= CM C^: T cu hi ^25 cii ODOOOO 0 0.5000 0:5000 0.5000 0.5000 0.1000 Ό.5000 0,5000 -o.sooo mm\ 1 0,5000 a, 5〇oo 0.5000 0.5000 ^0.5000 *0,5000 0.5000 O-SOOO 00D010 2 0.5000 0.5000 0,5000 0.5000 -0^000 0.5000 0.5000 -0,5000 0000" 3 0.5000 -0.5000 0.5000 -OJOOO -0.500D *0.5000 0.5000 ^O .SOOO _卯4 0"1_ -0,5000 0,5000 •〇,5〇0t) -0.5000 0,5000 0.5000 *0.5000 000101 5 -05000 -0.50 (10) 0,5000 0.5000 ,0·Miscellaneous 0.5000 •0,5000 Oooito (i 0.5000 oioaai 0,5000 0.50001 45000 ♦OJOOOi 0,5000 0.5000Ϊ 000111 7 0,5000 0;5000i 0.5000 O.SOOOt •0.5000 OiOOQi 0.5000 -0.50 (10) 001000 O.SOOO «0.5000» 0.5000 ^O;3〇0 〇i -0.5000 -0.50001 0.5000 o.soaoi 001001 9 o.sm ♦ O.SOOOi 0.5000 .0,50001 •03000 ο.5〇ωί 0.5000 -0^0001 m\m &gt;0 〇j〇m (W_ 0.5( 500 ¢, .1000 *0.5000 • 0' Hall 0,5000 O.JOOOi OOJOU n 0.5000 0,5000 03000 0,5000 •0.5000 0·5 Qing 04000 -0.50 (10) oonoo 12 0.5000 ojoooi 0:5000 0.50001 *0.3000 -Ο.ίΟΟί) 0.5000 04000 00Π01 13 0.5000 · 0.5000i 0.5000 0.30001 -0.5000 0.5000 0.5000 ▲0.5000 〇〇) m \\ 0.5000 0,5000 0,5000 •0.5000 0.5000 -0.5000 0.5000 0.5000 20 201126945 oomi u 0.5000 OiOOO 0·痛 OSM -W_i -0.5000i 0*353(^0^53« -0353()-0.&gt;S36i 0_0 16 〇, $〇〇〇-04000 (WOW -0.5000 *0,5000 • 0i_ 0.5000 O .S0001 ΰίΟΟΟΙ 1? 0.5000 -0,5000 0,5000 «0,5000 -0,5000 0.5000! 0.5000 *0,5000i ΰΐοοιο 0,5000 ·_(10) 0.5000 .0,5000 0.S58T Q,mi ^0.27%5i O .JJ6 丨,0.2735i -0,1U5-0.54711 oioou J9 -O.SOOO OJOOO 0,5000 0.5000 »0,_i Ο,ίΟΜ ^3000i 0夏0100 20 -0,5000 々mo 0,5000 0,5000 0.55S7 0.27m *〇.ii35.〇,S4tli 〇^(;l ^0,m5i tnom 21 -0*5000 *0*5000 0.5000 OJOOO Coffee? *0.2452 邰 U.lSWi mm n ,.靡0.5000 0,5000 -0,50()0 0.5000 U6〇Oi 0,5000 -aioooi otom 2.1 oiooo 0,5000 O.SOOO Liu 00 0,5000 O.SOOOi -O.SOOO 0,50001 otiooo 2*1 * 0.5000 0·5_ 0.5000 ^0,5000 0^5^7 •0.2990 + 0,08801 0.J361 ^0,273?) -0.52I6 + 0.3GI6) 0U001 25 0.5000 0.5000 0.5000 -0.5000 asm .(10)(10). ,0i_ *0, 50001 on oto 26 OJOOO 0.5000 0.5000 ^0,5000 turn •〇^&lt;1$2 * 0,5$m *0,5300 *0,l578i auon rt 0.50WO,500(Ji *0.5000 0,5000i 0,5000 - O.SOOO 0.5000 0,5000 OH tOO M 0 fiber 0.50001 .0,5000 0r50Mi 03587 0.3361^ 0,273Si 0.3δί&lt;5·0.521« omoi 0,5000 -0.5000 0,5000 0,5000 0,5000 *0,5000! -0,5000 • asoooi ouno 30 osm •o,so (10) 0.5000 a.sooo a.mi •0.2990.0 move di -0.J361 + 0.273?i -0.5216-0,3616 ( omn 31 OJWO 0,33⁄4 parts 0.5000 Ii 0.35.^1 0,_ *0,553$ ^0.35Mi -0.50Q0* 0,33X1 + 0.333« IOQOOO 32 0,5000 0.)536 + 0,3S.Wi OJOOQi ^&gt;,3536 + 0.35561 〇„% Ao 0,5_i 100001 n&quot;&quot;1 〇jm&gt; 0,5000( -0^3^ 4 0,353«! 0i000 • O.SOOOi ,0•Nana imw 3&g t;i 0.5000 0,J33&lt;&gt; + 0JiJ6i 0,50001 *0.35}&lt;ν·(·0.3ί36ί 0JUI7 〇t〇m^〇A2m ^J995-a^025t ^0.49(1⁄2'1〇.2&lt; ?741 1000It 35 oiooo .,0.50001 (}.35^ί * 〇,353&lt;ίι a face-O.JSM-0.3536j 0.5000! 0.3536

C 21 201126945 lOpiOO 36 -04000 o,mi (W_i 0,0104 rQJiSli 0,5000 OA(m » Q,mil -0.5000J ^I7S3( ) 0.*H45i 100101 3t Ο,ίΟΟΟ 0-5000 0,30P〇i -0.5000» *OJ5.\&lt;i-0.35a6i 100110 Your tism ofine-〇J$5&lt;;*0.553f;i *〇a#2*0,2Ti?i O.SOOOi •0.2735-0.336H . 0^3^-0.55^1 , 0, must be S + (UIMi i〇〇Ui 39 0*311? *0,5000 o.sooo *0 genus (10), 0, 0M 0.5000 «〇tH22^fK2^0Si -〇.:&gt;〇〇〇103000 40 03H7 *&lt;U0 (10) 0,6025 4 al^Si 0.50M ·&lt;ΜΟ&gt;0·0,#0:Η 0,5000 -0,1122-0.29081 -0.300 (1 101QOI *11 0,3117 tu butterfly*0,6025 - ol Wi 0.1001 «0.CQS2i -0^122-0.2903⁄4) 0.1105 ^0.2?« 0/10301 Q.mh (M service ί *ft.·丨Llii 101010 'M (U!H 0·face-0/6025-OJ!&gt;9:u 0,5000 *04122 0,5000 0.-1030 〇jm\ 0,5000 IO10II 43 uni 〇.$〇〇〇 0,«??,0,24 0,50001 0.(^25-〇.i¥h)Si *〇,$〇〇〇+ 〇,5ao〇! o.soooi JOIIOO 44 turn 0,5000 0,2452 » O^mi -0.5000 «0.6025 i 〇(TO5i 0.5000 Qtsm (* 0JS7Si 0*5000 lonoi 45 0.5W 0.4260 i om%\ -0.3530 ^0.35301 0.1995 * 0M2%\ -ozmoi M you 〇,秘i 0.3536 ^ 0J536i mm 46 0,3m 04000 -0,0793 ^0,43d0i *0-353« *0.Ι995·Μ025ί OiOOO) 0,490(5 *0-2^li 认娜4卿loim 41 wm Asm 0.1593 +O.fi02$i -oioooi O.2S74 -0.4006! &lt;O,j5J0O,MJ6i ΠΟΟΟΟ phase 0. ί^6 035^7 an^K〇,i5i2i ^0.1135-0,54711 -O.J3〇 »O.27〇3i 〇fi«ii 0.2?3Si it fine 40 0,5587 0.55 钌-Ο.Λί&lt;η * 0,27S5i 0,27J5O.W6Ii for lino 7Li 0.1135 ^ 0.547 H (UWHO that i 0.2735- 0.336H amo 50 04SS? o,sooo o.soooi 0jm^OMW 0.5000 α.2?35·〇.33^Η 0.5000» noon 51 03SS7 0.0SS0-0,20901 *0^000i 0,^1*0.27351 •0JQ00 ^Jo'UHO.SlIdi -0,50001 Π0100 52 05Tear t):$m 0,2990 i omu *0.33&lt;S2 ί 〇.27^5i •0 view+0.·ί a52l&lt;N OJdiCii ποιοι QMi$ 0娜0,2741 *0J5S9i ^0,3757 i*〇(l4»i 0.2^2+ 0J333I 0,27354 0.10SI +0.623&lt;?i HOliO S«1 0iSS&quot;7 〇(| $59 4 0,214 It *0.1492 *0.27371 *0.2735-0^3611 0^3(^0*1081; .0.6245 l· oi mi uom 55 0,311? o.sooo 0,.1030 + 0,^03⁄4 0,5000 0,5000 0.5000 IJ1000 5(i D.5000 0,_ Q,\m ΐ 〇Ami -W9*3,0,4 Habitat »045 ^ i 〇j,m\ ^03536 + 0.35Wi ,0.4619*0*19131

C 22 201126945 1L100I 57 0.3117 0.5000 0311? -0.5000 0.4030 - 0.4903Ϊ OJOOO -0.4030+0.4 卯M 0.5000 inoLO 58 0.3117 0.30S2 0JL17 -03152-0.0036Ϊ 0.4030-0.4903Ϊ 0.4076 * 0.48^i ^0.4030 + 0.49031 0.^ 1040-0.4S72i 1J10U 59 0.3117 0.5000 0-3Π7Ϊ -0.5000i -0.4030 + 0.4903Ϊ -0.5000 0.4903 + 0.*1030i -0.5003⁄4 mm 60 0.3117 0.30S2 0.3U71 0.0036-0.31521 -0*4030+0.49031 -0.4076 + 0.4 SSSi 0.4903+ 0.4030Ϊ -0.1872-0.40&lt;1〇1 llliOi 61 0.3Π7 0.5000 D.2204 + 0.304i -03536-0.3536Ϊ 0.4903 + 0.4030Ϊ 0.5000i 0.06I8+0.6317i 0.3536-0.3536i uiiio 62 0,3117 0.5000 -0.2204 + 0.2204i 0J536 - 0.3536i -0.4903-0.4030i — 0.50 (10) 0.631?-0.0618Ϊ -0.3536-03536i mm 61 03117 0.3082 -0*2204 + 0.22041 0*225^-0.220^1 -0.4903-0.40301 ^ 0.4888 - 0.40761 0.6317-0.06181 -0.6302 + 0.0588! In the basic CL-ΜΙΜΟ codebook shown in Table 2, the precoding matrix from m=0 to m=15 satisfies the strange modulus feature. That is, in the precoding matrix from m = 0 to m = 15, since the sum of the output powers of the precoding matrices of the respective antennas is equal, the constant modulus characteristic is satisfied. Therefore, in the regional mode, the coded thin subset can be configured by extracting a precoding matrix from m = 0 to m = 15. That is, from the basic CL-ΜΙΜΟ encoding thin, the encoding book subset C_localized(4, 2, 4) to be used in the regional mode can be configured. Meanwhile, in the diversity mode, a codebook subset can be extracted for maximization. Configured with a chord-spaced precoding matrix. For example, a precoding subset used in the diversity mode can correspond to m = 23, m = 29, m = 25, and m = by extracting a condition that satisfies the maximum chord from the basic SU-MIMO codebook. Configured with 27 precoding matrices. Although an explanation based on the basic coding thin form of Table 2 has been given, even when the number of transmit antennas and ranks is changed, a coded thin subset can be configured according to the mode using the above method.

C 23 201126945 The operation of the present invention in the uplink and downlink will be explained. Figure 4 is a flow diagram illustrating a method of allocating resources in the downlink, in accordance with an embodiment of the present invention. First, in the downlink, when a base station makes a feedback request to a UE, the base station notifies one of the UE area mode and the diversity mode, which is to be applied when the UE performs feedback (step 401). That is, when the base station makes a request for feedback information to the UE, the base station notifies the UE of the mode in which the IJE should transmit the feedback information (one of the area mode or the diversity mode). The ue of the notified mode, together with the request for feedback, selects a precoder from a codebook subset corresponding to the notified mode, applies a precoder' and transmits feedback information (step 4〇2). The feedback information can correspond to the information used to set a level of (10) or McS. The base station allocates resources to the UE using the feedback information (step 4〇3). At this time, as described above, the same code sub-set can be configured according to the mode, and the precoder can be selected from different code thin subsets according to the mode. Figure 5 is a flow chart illustrating a method of transmitting data in an uplink keyway in accordance with an embodiment of the present invention. In the uplink mode, when the data is transmitted or the like in the uplink, a base station sets the mode to be applied (area mode or diversity mode), sets a CQI or MCS level according to the mode, and notifies the UE. The set mode (step 5 〇 (1). The mode can be directly notified by using the control information, or can be indirectly notified according to a sub-channelization rule, that is, the mode is selected from the corresponding mode - (four) - (four) code (4) Encoder, and transmit data in the upper (four) way (step 5 () 2). At this time, as described above, different coding thin subsets can be configured according to the imaging mode, and the precoder can be based on 24 201126945 The mode is selected from different code subsets. Fig. 6 is a block diagram showing the configuration of a device applied to the base station and the user equipment (10) and capable of performing the above method. As shown in Fig. 6, the device 6〇 A processing unit 61, a memory unit, a radio frequency (RF) unit 63, a display 7064, and a user interface unit 65 - a physical interface protocol layer are provided by the processing unit 61. The processing unit 61 provides - control level And a user plane. The functions of each level can be implemented by the processing unit 61. The memory unit 62 is electrically connected to the processing unit 70 61 and stores the operating system, the application program, and the general file. If the device 6 is a UE, the display unit 64 彳 displays various information and can be performed using a known liquid crystal display n (LCD), organic light emitting diode (LED) or the like. The user interface unit 65 can be configured by a combination of known user interfaces. For example, a keypad and a touch screen ❶rf unit are electrically connected to the processing unit 61 for transmitting or receiving an RF signal. For a person skilled in the art, for a network composed of several network nodes. The various operations that enable the base station to communicate with the UE will be readily apparent, and several of the network nodes include base stations implemented by network nodes other than the base station or the base station. The term "base station" is necessary. The time may be replaced by "fixed station", "node B", "eNodeb (eNB)" or "access point J". The term "user equipment" corresponds to a mobile station (MS) and "Ms" The term can also be used if necessary Replaced by the words "user station (ss)", "mobile subscriber station (MSS)", or "mobile terminal". At the same time, for example, the UE of the present invention can use a personal assistant (PDA), a mobile phone, and a personal communication service. (PCS) telephone, a full 25 201126945 ball action system (GSM) telephone, a broadband CDMA (WCDMA) telephone' or a mobile broadband system (MBS) telephone. Embodiments of the invention may be performed by various means, for example hard Body 'firm body, software or a combination thereof. In the case of performing the invention by hardware, the invention may be applied by an application specific integrated circuit (ASICS), a digital signal processor (DSPS), a digital signal processing device (DSPDS). , Programmable Logic Pack (PLDS), Field Programmable Array (FPGAS), processor, controller, a microcontroller, a microprocessor, etc. If the operations and functions of the present invention are performed by firmware or software, the present invention can be implemented in various forms, for example, modules, programs, functions, and the like. The software code can be stored in a memory unit for driving by a processor. The memory unit is located within or outside the processor such that it can communicate with the aforementioned processor through various well known components. The calendar can be applied to a user device or network for use in a wireless access system. A person skilled in the art can make various modifications and changes in the present invention without departing from the spirit and scope of the invention. Accordingly, this disclosure is intended to cover modifications and variations of the present invention, in the scope of the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this application. The principle of the invention, in the drawings: Figure 1 shows the configuration of a general multi-input multi-output (ΜΙΜΟ) system; Figure 2 shows a configuration of a downlink μιμ〇 in a transmitter; Figure 3 is a diagram showing a procedure for mapping physical resource units (p]RUs) to logical resource units (LRUs); Figure 4 is a flow chart illustrating a downlink in accordance with an embodiment of the present invention. Method for allocating resources in a road; FIG. 5 is a flowchart illustrating a method for transmitting data in an uplink according to an embodiment of the present invention; and FIG. 6 is a block diagram showing application to a base station And a user equipment (UE) and capable of implementing the configuration of a device of the above method. [Main component symbol description] 201 ΜΙΜΟ encoder 202 precoder 2 〇 3 times carrier mapper 60 device 61 processing unit 62 memory unit 63 RF unit 64 display unit 65 user interface unit 27

Claims (1)

201126945 VII. Patent application scope: 1. A kind of feedback method for user equipment in an open loop multiple input multiple output (mim〇) system. The feedback method includes the following steps: base station receiving according to which will be used to implement feedback One of a plurality of modes determined by the resource type; and selecting a precoding matrix from the coded thin subset corresponding to the received mode, applying the selected pre-programmed information, and transmitting the feedback Wherein different coded thin subsets are configured with respect to the plurality of modes and the coding family is assembled in a feature such as material mode (4) = pre-determined criteria 'by pre-determining the number of elements from the basic codebook' And configuration. 2. The feedback method of claim 1, wherein the plurality of modes comprise a regional mode and a diversity mode, and when the inverse is transmitted in the regional mode, the sub-band adjacent resource unit "coffee" is used as a logical resource unit 'and when transmitted in the diversity mode, - a decentralized resource unit (DRU) or a mini-band based (10) ie (four) - a logical resource list 3, such as the feedback method of claim 2, t The coded material should be configured by "extracting from the basic codebook - a predetermined number of elements that satisfy the constant modulus feature. 28 201126945 A method of rewarding the second item of the patent scope, wherein the codebook corresponding to the diversity, 弋 is configured by extracting a predetermined element from the basic codebook and the elements are used to maximize a chord. A method for equipping a resource in a multi-input multi-output (ΜΙΜΟ) system in an open-loop multi-input multi-output (ΜΙΜΟ) system, the method comprising the following steps: when the user equipment transmits feedback information, the base station notifies the user equipment In a plurality of modes, the modes indicate the type of the resource to be used; receiving the feedback information, wherein the code-based moment consumption of the mode selected from a coded thin subset corresponding to the notification is applied to the feedback information丨And allocating the resources to the user equipment using the received feedback information, wherein different codebook subsets are configured relative to the plurality of modes and the codebook subset is based on the mode in consideration of the modes The feature-predetermined criteria 'is configured by pre-determining the number of elements from the basic coding thin. 6. The method of claim 5, wherein the (4)-area mode and a diversity mode, when transmitting in the regional mode, the sub-band adjacent resource unit (CRU) is used as a logical element and when When transmitting in the diversity mode, a decentralized resource Cuiyuan ((10) or a mini-band based CRU is used as a logical resource unit. 29 201126945 7·such as the method of Shenqing Patent Range Item 6, which corresponds to the regional mode The coded thin subset is configured by extracting from the basic codebook, a predetermined number of 7G elements, which satisfy the constant modulus feature. 8. The method of applying the patent (4) 8 items, wherein the diversity mode is A codebook is configured by extracting a predetermined number of pixels from the basic codebook, the elements being used to maximize a chord. 9. - On-circuit multi-input multi-output (mimg) system Determining user equipment for transmitting feedback information, the user equipment comprising: - a receiving unit configured to receive from a base station a plurality of modes determined according to a type of resource to be used for performing feedback a unit 'configured to select a precoding matrix corresponding to the received pattern from a coded thin subset, applying the selected precoding matrix 'and generating the feedback information; and a transmitting unit And configured to transmit the generated feedback information, wherein the receiving unit, the processing unit, and the transmitting unit are selectively configured to be configured with respect to the plurality of modes, ^: code thin subset Based on a criterion that takes into account the characteristics of the modes, the criterion is obtained by extracting _ pre-determined number of 篁 从 从 from a basic coding thin, wherein the plurality of 〇. User equipment, 201126945 mode includes a regional mode and a diversity mode, when transmitting in the regional mode, a sub-band adjacent resource unit (CRU) is used as a logical resource unit' and when in the diversity mode When transmitting, a decentralized resource unit (DRU) or a mini-band based CRU is used as a logical resource unit. 11. The user equipment of claim 1 of the patent application, wherein A subset of codebooks in the region mode is configured by extracting a predetermined number of elements from the basic codebook, the elements satisfying a constant modulus characteristic. 12. The user equipment of claim 10, A codebook corresponding to the diversity mode is configured by extracting from the basic codebook, a predetermined number of elements, which are used to maximize the chord distance.