TWI489831B - Method for grnerating a reference signal sequence using grouping - Google Patents
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Description
本發明係關於一種用以產生參考信號序列之方法，且尤其更關於用以將具有對應於一資源塊大小之一或更多的可變長度的序列分組之方法，一種用以產生參考信號序列之方法，及一種用以使用Zadoff－Chu(ZC)序列產生參考信號序列之方法。The present invention relates to a method for generating a reference signal sequence, and more particularly to a method for grouping sequences having variable lengths corresponding to one or more resource block sizes, one for generating a reference signal sequence And a method for generating a reference signal sequence using a Zadoff-Chu (ZC) sequence.
以下解釋主要係根據3GPP LTE系統來討論，但本發明不受限於此系統，且範例性3GPP LTE系統係僅用於使熟習此項技術人士清楚地理解本發明。The following explanation is mainly based on the 3GPP LTE system, but the present invention is not limited to this system, and the exemplary 3GPP LTE system is only used to make the present invention clear to the person skilled in the art.
係有許多用以傳輸信號之序列，但在3GPP LTE(第三代合夥專案長期進化)系統中，CAZAC(恆定振幅零自相關)序列形成用以傳輸信號之基礎序列。CAZAC序列可用於各種用以擷取ID或控制資訊之通道如上行鏈路/下行鏈路同步通道(SCH)(其包括P－SCH(主要SCH)及S－SCH(次要SCH))、用以傳輸參考信號之先導通道。並且，可將CAZAC序列用於擾碼(scrambling)。There are many sequences for transmitting signals, but in the 3GPP LTE (Third Generation Partnership Project Long Term Evolution) system, the CAZAC (Constant Amplitude Zero Autocorrelation) sequence forms the basis sequence for transmitting signals. The CAZAC sequence can be used for various channels for extracting ID or control information such as uplink/downlink synchronization channel (SCH), which includes P-SCH (primary SCH) and S-SCH (secondary SCH), To transmit the pilot channel of the reference signal. Also, the CAZAC sequence can be used for scrambling.
兩種類型之CAZAC序列，即GCL CAZAC序列及Zadoff－Chu CAZAC序列主要係用作CAZAC序列。該兩種類型的CAZAC序列係藉由一共軛複數關係彼此相關聯。即GCL CAZAC序列可藉由用於Zadoff－Chu CAZAC序列之共軛複數計算獲取。Zadoff－Chu CAZAC序列係提供如下。Two types of CAZAC sequences, the GCL CAZAC sequence and the Zadoff-Chu CAZAC sequence, are primarily used as CAZAC sequences. The two types of CAZAC sequences are related to each other by a conjugate complex relationship. That is, the GCL CAZAC sequence can be obtained by conjugate complex calculation for the Zadoff-Chu CAZAC sequence. The Zadoff-Chu CAZAC sequence is provided below.
其中k代表一序列部分索引(index)，N表示欲產生之CAZAC序列的長度，且M代表序列ID或序列索引。Where k represents a sequence partial index, N represents the length of the CAZAC sequence to be generated, and M represents the sequence ID or sequence index.
當由方程式1及2給定之Zadoff－Chu CAZAC序列，且係與Zadoff－Chu CAZAC序列的共軛複數關係之一GCLCAZAC序列由c(k；N，M)代表時，此等序列可具有如以下三特徵。When the Zadoff-Chu CAZAC sequence given by Equations 1 and 2, and one of the conjugate complex relations of the Zadoff-Chu CAZAC sequence, is represented by c(k; N, M), the sequences may have the following Three features.
[方程式3]∣C (k ；N ；M )∣＝1(用於所有k、N、M)[Equation 3] ∣ C ( k ; N ; M ) ∣ = 1 (for all k, N, M)
[方程式4]R M；N (d )＝1(當d ＝0 )R M；N (d )＝0(當d≠0 )[Equation 4] R M; N ( d ) = 1 (when d = 0 ) R M; N ( d ) = 0 (when d ≠ 0 )
[方程式5]RM1,M2；N (d)＝p(用於所有M1 ，M2 及N)[Equation 5] R M1, M2; N (d) = p (for all M 1 , M 2 and N)
方程式3意指CAZAC序列恆具有l之大小，且方程式4顯示CAZAC序列之一自相關函數係藉由一Delta函數表達。在此情況下，自相關係基於環形相關。另外，方程式5顯示一交互相關係恆為一常數。Equation 3 means that the CAZAC sequence has a size of l, and Equation 4 shows that one of the CAZAC sequences is expressed by a Delta function. In this case, the self-phase relationship is based on a ring correlation. In addition, Equation 5 shows that an interactive phase relationship is always a constant.
在此兩種CAZAC序列中，以下解釋係主要集中於 Zadoff Chu序列(以下為「ZC序列」)。In the two CAZAC sequences, the following explanations are mainly focused on Zadoff Chu sequence (hereinafter "ZC sequence").
在3GPP LTE系統(將此ZC序列用作參考信號序列)中，ZC序列之長度應等於資源塊大小。並且，不僅使用一資源塊大小序列，且可使用具有對應於資源塊大小之更多的長度之參考信號序列。In the 3GPP LTE system (using this ZC sequence as a reference signal sequence), the length of the ZC sequence should be equal to the resource block size. Also, not only a resource block size sequence is used, but a reference signal sequence having a length corresponding to the resource block size can be used.
對於單一胞環境而言，參考信號係藉由用以將來自多使用者設備(UE)之信號進行多工的局部FDM(分頻多工)方法傳輸。但對於多胞環境，參考信號係藉由用以將信號與相鄰胞區分之額外CDM(分碼多工)方法傳輸。在此多工中，兩類型方法係可能。其一係使用具有一不同根索引之ZC序列的CDM方法，而另一方法係使用具有相同根索引(M)但具有不同應用循環平移之ZC序列。For a single cell environment, the reference signal is transmitted by a local FDM (Frequency Division Multiplexing) method for multiplexing signals from multiple user equipments (UEs). However, for a multi-cell environment, the reference signal is transmitted by an additional CDM (Code Division Multiplexing) method used to distinguish the signal from neighboring cells. In this multiplex, two types of methods are possible. One uses a CDM method with a ZC sequence with a different root index, while the other uses a ZC sequence with the same root index (M) but with different application loop translations.
當使用此等種ZC序列之參考信號長度相同時，用於兩情況之交互相關值係不大。但當具有差異長度之參考信號變成來自相鄰胞之干擾，且透過相同頻帶或重疊頻帶傳輸時，交互相關值將會明顯。When the reference signal lengths using these ZC sequences are the same, the cross-correlation values for the two cases are not large. However, when the reference signal having the difference length becomes interference from the adjacent cell and is transmitted through the same frequency band or the overlapping frequency band, the cross correlation value will be conspicuous.
因此，本發明係關於提供一種用以產生參考信號序列的方法，其使來自相鄰胞而具有不同長度之信號所造成的干擾減至最少。Accordingly, the present invention is directed to a method for generating a sequence of reference signals that minimizes interference caused by signals from adjacent cells having different lengths.
對於此方法，本發明亦提供一種用於有效地分組序列的方法，使得該組中之各者係由有具有高交互相關值的序列組成，且支援可變長度序列以用作一參考信號。For this method, the present invention also provides a method for efficiently grouping sequences such that each of the groups consists of sequences having high cross-correlation values and supports variable length sequences for use as a reference signal.
另外，本發明提供一種用以基於以上分組產生參考信號序列之方法。Additionally, the present invention provides a method for generating a reference signal sequence based on the above grouping.
為達成此等目的及其他優點且根據如在此包含而廣義描述之本發明目的，係提供一種用於將具有對應於一資源塊大小之一或更多的一可變長度之序列分組的方法。根據一具體實施例，該方法包括：將該等序列分成複數組，以致該等組之各組包含各長度的至少一序列，其中該經分組序列係一基本序列，其係用以應用一對應於可變循環平移值的循環平移，且具有該循環平移之該基本序列係用作一參考信號序列。To achieve these and other advantages and in accordance with the present invention as broadly described herein, a method for grouping sequences of a variable length corresponding to one or more resource block sizes is provided. . According to a specific embodiment, the method comprises: dividing the sequences into complex arrays such that each group of the groups comprises at least one sequence of lengths, wherein the grouped sequence is a basic sequence used to apply a correspondence The cyclic translation of the variable cyclic translation value, and the basic sequence having the cyclic translation is used as a reference signal sequence.
較佳係，該等組之數目係30。Preferably, the number of such groups is 30.
並且，該分組可執行以致該等組之各組包含一對應於該資源塊大小的1至5倍的各長度之基本序列，及對應於該資源塊大小之6或更多倍的各長度之兩基本序列。And, the grouping is executable such that each group of the groups includes a basic sequence of lengths corresponding to 1 to 5 times the size of the resource block, and lengths corresponding to 6 or more times the size of the resource block. Two basic sequences.
並且，較佳係具有對應於該資源塊大小之3或更多倍的一長度之該基本序列，係藉由使用一Zadoff－Chu(ZC)序列之方式而定義，且具有對應於該資源塊大小之1或2倍的一長度之該基本序列，係藉由使用除了該ZC序列以外的其他序列之方式而定義。And preferably, the basic sequence having a length corresponding to 3 or more times the size of the resource block is defined by using a Zadoff-Chu (ZC) sequence and having a corresponding resource block The basic sequence of a length of 1 or 2 times the size is defined by using a sequence other than the ZC sequence.
在本發明之另一態樣中，係提供一種用以產生一參考信號序列之方法。在用於此態樣之一具體實施例中，該方法包含：定義具有一對應於一資源塊大小之一或更多的可變長度之一或更多基本序列；且將一對應於可變循環平移值之循環平移應用至該經定義基本序列，其中該等基本序 列被分組，且該組之各者包含各長度的至少一基本序列。In another aspect of the invention, a method for generating a sequence of reference signals is provided. In a specific embodiment for use in this aspect, the method includes: defining one or more base sequences having a variable length corresponding to one or more resource block sizes; and one corresponding to the variable A cyclic translation of a cyclic translation value is applied to the defined basic sequence, wherein the basic sequences The columns are grouped, and each of the groups contains at least one basic sequence of length.
在此情況下，該基本序列可藉由具有由一最大質數給定的一長度()之該ZC序列的循環擴張(extension)來定義，該最大質數係小於對應參考信號序列大小。另外該基本序列可藉由具有由一最小質數給定的一長度()之該ZC序列的截斷(truncation)來定義，該最小質數係大於一對應參考信號序列大小。In this case, the basic sequence can have a length given by a maximum prime number ( Defined by a cyclic extension of the ZC sequence, the maximum prime number being less than the corresponding reference signal sequence size. In addition, the basic sequence can have a length given by a minimum prime number ( Defined by the truncation of the ZC sequence, the minimum prime number is greater than a corresponding reference signal sequence size.
另外在此具體實施例中，較佳係該等組之數目係30。Also in this particular embodiment, the number of such groups is preferably 30.
並且，該等組之各組可包含對應於該資源塊大小的1至5倍的各長度之一基本序列，及對應於該資源塊大小之6或更多倍的各長度之兩基本序列。And, each group of the groups may include one basic sequence of each length corresponding to 1 to 5 times the size of the resource block, and two basic sequences of lengths corresponding to 6 or more times the size of the resource block.
並且，具有對應於該資源塊大小的3或更多倍的一長度之該基本序列，可藉由使用一具有特定ZC序列索引(q)之Zadoff－Chu(ZC)序列之方式來定義，且具有對應於該資源塊大小的1或2倍的一長度之該基本序列，係藉由使用除了該ZC序列以外的其他序列之方式來定義。And, the basic sequence having a length corresponding to 3 or more times the size of the resource block can be defined by using a Zadoff-Chu (ZC) sequence having a specific ZC sequence index (q), and The basic sequence having a length corresponding to 1 or 2 times the size of the resource block is defined by using a sequence other than the ZC sequence.
並且，較佳係該特定ZC序列索引(q)係一組索引(u)及該組內之一基本序列數目索引(v)之函數。And, preferably, the specific ZC sequence index (q) is a function of a set of indices (u) and a base sequence number index (v) within the group.
而且，具有循環平移之該經定義基本序列可用作上行鏈路參考信號序列。Moreover, the defined basic sequence with cyclic translation can be used as an uplink reference signal sequence.
另外對於以上具體實施例，該資源塊大小可對應於一在一頻域中之12副載波的大小。In addition, for the above specific embodiment, the resource block size may correspond to a size of 12 subcarriers in a frequency domain.
在本發明之另一態樣中，係提供一種用於使用Zadoff－Chu(ZC)序列來產生一參考信號序列之方法。在用 於此態樣之一具體實施例中，該方法包含：使用第q根ZC序列定義一特定基本序列，其中該基本序列被分組，且該「q」係一組索引(u)及該組內之一基本序列數目索引(v)的一函數；及將一對應於可變循環平移值之循環平移應用至該經定義基本序列，以產生該參考信號序列。In another aspect of the invention, a method for generating a reference signal sequence using a Zadoff-Chu (ZC) sequence is provided. Using In one embodiment of the aspect, the method includes: defining a specific basic sequence using the qth ZC sequence, wherein the basic sequence is grouped, and the "q" is a set of indices (u) and within the group a function of one of the basic sequence number indices (v); and applying a cyclic translation corresponding to the variable cyclic translation value to the defined base sequence to generate the reference signal sequence.
在一情況中，該特定ZC序列索引(q)可藉由以下方程式之一決定，
其中 among them
其中係藉由小於對應參考信號序列大小之最大質 數所給定的長度，係該對應參考信號序列大小，「round(z)」係一捨入至一最接近z之最接近整數的函數，且「floor(z)」係一使一最大整數不大於z之函數。但對於本發明之另一具體實施例，可為藉由大於該對應參考信號序列之該最小質數所給定之該長度。among them By a length given by a maximum prime number smaller than the size of the corresponding reference signal sequence, The size of the corresponding reference signal sequence, "round(z)" is a function rounded to a nearest integer that is closest to z, and "floor(z)" is a function that makes a maximum integer not greater than z. But for another embodiment of the invention, The length may be given by the minimum prime number greater than the corresponding reference signal sequence.
在另一情況中，該特定ZC序列索引(q)可藉由以下方程式之一決定，
其中係由小於該對應參考信號序列大小之該最大 質數所給定的該長度，係該對應參考信號序列大小，「round(z)」係一捨入至一最接近z之最接近整數的函數，且「floor(z)」係一造成一最大整數不大於z之函數。但對於本發明之另一具體實施例，可為藉由大於該對應參考信號序列之該最小質數所給定之該長度。among them The length given by the largest prime number less than the size of the corresponding reference signal sequence, The size of the corresponding reference signal sequence, "round(z)" is a function rounded to a nearest integer that is closest to z, and "floor(z)" is a function that causes a maximum integer to be no greater than z. But for another embodiment of the invention, The length may be given by the minimum prime number greater than the corresponding reference signal sequence.
在本發明之一特定具體實施例中，可設定各組內之基本序列數目索引(v)的最大數目係2，而後該特定ZC序索引(q)係藉由以下方程式之一決定， (1)q ＝round (y )＋v ·(－1) floor (2y ) 其中(2)q ＝round (y )＋v ·(－1) floor (2y ) 其中，或 (3)q ＝round (y )＋v ·(－1) floor (2y ) 其中 In a specific embodiment of the present invention, the maximum number of basic sequence number indices (v) in each group can be set to 2, and then the specific ZC order index (q) is determined by one of the following equations, (1) q = round ( y ) + v · (-1) floor (2 y ) where (2) q = round ( y ) + v · (-1) floor (2 y ) where , or (3) q = round ( y ) + v · (-1) floor (2 y ) where
rr藉由以下方程式之一，(1)q ＝floor (y ＋0.5)＋v ·(－1) floor (2y ) 其中(2)q ＝floor (y ＋0.5)＋v ·(－1) floor (2y ) 其中，或 (3)q ＝floor (y ＋0.5)＋v ·(－1) floor (2y ) 其中 Rr is one of the following equations, (1) q = floor ( y +0.5) + v ·(-1) floor (2 y ) (2) q = floor ( y +0.5) + v ·(-1) floor (2 y ) where , or (3) q = floor ( y +0.5) + v ·(-1) floor (2 y ) where
較佳係，可將設定成31或37，但亦可將設定成其他值。Better, can be Set to 31 or 37, but it can also Set to other values.
根據本發明之此等具體實施例，因為將應用於循環平移的該基本序列分組，且各組包含各長度的至少一基本序列，當將特定組分配給一胞或節點B時，UE可將各種長度序列用作一參考信號序列。According to such specific embodiments of the present invention, since the basic sequence to be applied to the cyclic shift is grouped, and each group contains at least one basic sequence of each length, when a specific group is assigned to a cell or a Node B, the UE may Various length sequences are used as a reference signal sequence.
此外，因為各組包含具有高交互相關關係之基本序列，若將各組分配給一胞或節點B時，可使胞間干擾減至最少。In addition, since each group contains a basic sequence with a high cross-correlation relationship, inter-cell interference can be minimized if each group is assigned to a cell or node B.
下文中將會參考附圖詳述本發明之較佳具體實施例。應瞭解將會連同附圖揭示之詳細說明，係意於描述本發明的範例性具體實施例，而非意於描述可實現本發明之一唯 一具體實施例。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the detailed description of the embodiments of the invention A specific embodiment.
下文中，詳細描述包括詳細主題以提供對於本發明的完全理解。然而，熟習此項技術人士應瞭解可實現本發明而無須該等詳細主題。為避免本發明之概念發生歧義，將省略已知技術之結構及設備，或將會以基於各結構及設備之主要功能的方塊圖來顯示。另外，盡其可能會在遍及圖式及說明書中使用相同參考數字以指相同或類似部分。The detailed description includes the detailed description to provide a complete understanding of the invention. However, those skilled in the art will appreciate that the invention can be practiced without such detailed subject matter. In order to avoid ambiguity in the concept of the present invention, the structures and devices of the known technology will be omitted or will be shown in block diagrams based on the main functions of the structures and devices. In addition, the same reference numerals will be used throughout the drawings and the description to refer to the same or the like.
如以上所述，本發明係關於提供一種用以產生參考信號序列的方法，其使來自相鄰胞而具有不同長度之信號所造成的干擾減至最少。As described above, the present invention is directed to a method for generating a reference signal sequence that minimizes interference caused by signals from adjacent cells having different lengths.
因此，係解釋CAZAC序列的長度。Therefore, the length of the CAZAC sequence is explained.
目前，在3GPP LTE系統中，用以傳輸包括參考信號符號之所有種類OFDM符號的資源塊(RB)大小，對應於12副載波之大小。因此，當ZC已產生用於上行鏈路參考信號序列時，ZC序列之大小將對應於12副載波大小。Currently, in a 3GPP LTE system, a resource block (RB) size for transmitting all kinds of OFDM symbols including reference signal symbols corresponds to a size of 12 subcarriers. Therefore, when ZC has been generated for the uplink reference signal sequence, the size of the ZC sequence will correspond to 12 subcarrier sizes.
對於CAZAC序列之情況，可彼此區分之CAZAC序列索引(M)之數目，係藉由對於序列長度(N)係互質之互質數來決定。因此，當ZC序列係產生以具有12之長度時，具有不同序列索引之ZC序列的數目係4。但，若ZC序列係基於質數長度(N)產生，具有不同序列索引之ZC序列的數目可能係N－1，其使ZC序列的數目最大。因此，係提供用以基於質數長度產生CAZAC序列的各種方法。For the case of the CAZAC sequence, the number of CAZAC sequence indices (M) that can be distinguished from one another is determined by the number of primes for the sequence length (N). Thus, when the ZC sequence is generated to have a length of 12, the number of ZC sequences with different sequence indices is 4. However, if the ZC sequence is generated based on the prime length (N), the number of ZC sequences with different sequence indices may be N-1, which maximizes the number of ZC sequences. Therefore, various methods are provided for generating CAZAC sequences based on the length of the prime.
首先係解釋一種截斷序列產生方法。First, a method of generating a truncated sequence is explained.
第1圖顯示用以解釋截斷序列產生方法之概念圖。Figure 1 shows a conceptual diagram to explain the method of generating a truncated sequence.
如第1圖顯示，當所需CAZAC序列長度係「L」時，具有「X」(其中X>L)質數長度之CAZAC序列會產生。並且，具有長度「X」之經產生CAZAC序列被截斷以具有長度「L」，即，具有「X－L」長度之序列的部分被截斷。As shown in Fig. 1, when the required CAZAC sequence length is "L", a CAZAC sequence having a prime length of "X" (where X > L) is generated. Further, the generated CAZAC sequence having the length "X" is truncated to have a length "L", that is, a portion having a sequence of "X-L" length is truncated.
藉由此方法，使CAZAC序列之數目最大。但因為經產生序列的部分被截斷，以方程式4及5解釋之CAZAC序列的自/交互相關性質係些許惡化。並且，當除去具有不良相關性質之序列時，實際序列數目會縮小。此外，由於該截斷，亦可能使CAZAC序列之良好PAPR性質惡化。By this method, the number of CAZAC sequences is maximized. However, since the portion from which the sequence is generated is truncated, the self-interacting correlation properties of the CAZAC sequence explained by Equations 4 and 5 are slightly deteriorated. Also, when sequences having poor correlation properties are removed, the actual number of sequences is reduced. In addition, due to this truncation, it is also possible to deteriorate the good PAPR properties of the CAZAC sequence.
因此，係呈現用以基於質數產生CAZAC序列的另一類型方法。此等方法之一係CAZAC序列被產生以具有質數長度「X」(其中X<L)，且具有「L－X」長度的部分被增加至經產生CAZAC序列。增加至經產生序列中之此部分可稱為填充(padding)部分，故此方法可稱為使用填充部分之產生方法。Therefore, another type of method for generating CAZAC sequences based on prime numbers is presented. One of these methods is that the CAZAC sequence is generated to have a prime length "X" (where X < L), and the portion having the length of "L-X" is added to the generated CAZAC sequence. The addition to this portion of the generated sequence may be referred to as a padding portion, so this method may be referred to as a method of generating a filled portion.
第2圖顯示用以解釋使用填充部分之產生方法的概念圖。Fig. 2 is a conceptual diagram for explaining a method of generating a filled portion.
如第2圖顯示，當所需CAZAC序列長度係「L」時，CAZAC序列會產生以具有長度「X」，其係小於「L」之最大質數。並且，具有「L－X」之長度的填充部分係增加至該經產生序列。As shown in Fig. 2, when the required CAZAC sequence length is "L", the CAZAC sequence is generated to have a length "X" which is less than the maximum prime number of "L". Also, the filled portion having the length of "L-X" is added to the generated sequence.
在一用於此類方法之方法中，填充部分可由零組成。藉由此方法，可使CAZAC序列之數目最大。此外，當序列之區別係相對於第2圖中之「C1」長度進行時，可維持 CAZAC序列的自/交互相關性質。In a method for such a method, the fill portion can be composed of zeros. By this method, the number of CAZAC sequences can be maximized. In addition, when the difference in sequence is maintained relative to the length of "C1" in Figure 2, it can be maintained. Self/interaction related properties of CAZAC sequences.
並且，較佳係該填充部分可為CAZAC序列之一循環擴張。即，填充部分(C2)可藉由該經產生CAZAC序列之第一部分的循環複製產生，且加至經產生序列。藉由如此進行，即使當序列之區別係相對於整體序列長度(L)進行時，產生之序列可具有一良好自交互相關。因此，此方法具有比以上使用填充部分為零之方法更佳的優點。Also, preferably, the filling portion can be cyclically expanded in one of the CAZAC sequences. That is, the packed portion (C2) can be generated by circular replication of the first portion of the generated CAZAC sequence and added to the generated sequence. By doing so, even when the difference in sequence is made relative to the overall sequence length (L), the resulting sequence can have a good self-interaction correlation. Therefore, this method has an advantage over the above method in which the filling portion is zero.
使用CAZAC序列產生參考信號序列之本發明，係主要基於使用由上述循環擴張產生之填充部分的產生方法。但，無須限制為此產生方法，即本發明可基於截斷序列產生方法及使用由零組成之填充部分的產生方法。The present invention for generating a reference signal sequence using a CAZAC sequence is based primarily on the use of a method of generating a filled portion resulting from the above-described cyclic expansion. However, it is not necessary to limit the method for generating the same, that is, the present invention can be based on the method of generating a truncated sequence and the method of producing a filled portion composed of zero.
基於此，係解釋藉由使用具有差異長度之序列造成的胞間干擾。Based on this, inter-cell interference caused by using sequences having different lengths is explained.
當將CAZAC序列用作參考信號序列時，胞間干擾係與兩序列間之交互相關值成比例。因此，在以下實例中，交互相關值(由透過某資源區傳輸之原始參考信號，及來自具有與原始參考信號之差異長度的相鄰胞且透過相同資源區傳輸之進入序列間的重疊造成)係針對ZC序列之索引考慮。When a CAZAC sequence is used as a reference signal sequence, the intercellular interference is proportional to the cross-correlation value between the two sequences. Thus, in the following example, the cross-correlation value (caused by the original reference signal transmitted through a certain resource region and the overlap between the incoming sequences transmitted from the neighboring cells having the difference length from the original reference signal and transmitted through the same resource region) It is considered for the index of the ZC sequence.
更明確言之，在以下實例中，係考慮具有1RB、2RB及3RB之長度的序列。並且，假定具有1RB及2RB長度之序列，係藉由具有由小於一對應資源塊大小的最大質數給定之ZC序列的循環擴張產生。並且，假定具有3RB長度的序列係藉由截斷序列產生方法所產生。即，可產生該等序列 以具有對應資源塊大小，其係基於質數長度藉由以上3產生方法之一。More specifically, in the following examples, sequences having a length of 1 RB, 2 RB, and 3 RB are considered. Also, it is assumed that a sequence having a length of 1 RB and 2 RB is generated by a cyclic extension having a ZC sequence given by a maximum prime number smaller than a corresponding resource block size. Also, it is assumed that a sequence having a length of 3 RB is generated by a truncation sequence generation method. That is, the sequences can be generated To have a corresponding resource block size, which is based on the prime length by one of the above three generation methods.
首先，考慮當具有1RB長度之序列及具有2RB長度的序列係在相同資源區重疊時之情況。具有1RB長度之序列及具有2RB長度的序列可表達如下。First, consider the case when a sequence having a length of 1 RB and a sequence having a length of 2 RB overlap in the same resource region. A sequence having a length of 1 RB and a sequence having a length of 2 RB can be expressed as follows.
在此，s1 及s2 指示索引，其係對於序列長度(N或2N)互質。在此實例中，因為具有1RB長度及2RB長度之序列係使用循環擴張方法產生，s1 可為1、2、...、10，而s2 可為1、2、...、22。並且，N1 可為11，且N2 可為23。Here, s 1 and s 2 indicate an index which is relatively prime for the sequence length (N or 2N). In this example, since a sequence having a length of 1 RB and a length of 2 RB is generated using a cyclic expansion method, s 1 may be 1, 2, ..., 10, and s 2 may be 1, 2, ..., 22. Also, N 1 may be 11, and N 2 may be 23.
基於此，當具有1RB長度之序列係與在具有2RB長度之序列之前12副載波區中具有2RB長度的序列重疊時所產生的交互相關值(c (d ；s 1 、s 2 ))可表達如下。Based on this, the cross-correlation value ( c ( d ; s 1 , s 2 )) generated when the sequence having the length of 1 RB overlaps with the sequence having the length of 2 RB in the 12 subcarrier regions before the sequence having the length of 2 RB can be expressed. as follows.
根據方程式7，可理解若序列索引(s1 及s2 )之結合符合之項變得接近零的條件，由此等序列索引指示的序 列導致高交互相關。According to Equation 7, it can be understood that if the sequence index (s 1 and s 2 ) is combined The item becomes a condition close to zero, whereby the sequence indicated by the sequence index leads to a high cross-correlation.
因此，本發明之一具體實施例建議執行將該等序列分成組，以致各組內包含之序列具有與彼此的高交互相關關係。並且，若考慮1RB長度序列及2RB長度序列，則建議將符合之項變得接近零的條件之序列索引的結合分組。Accordingly, one embodiment of the present invention suggests performing the grouping of the sequences such that the sequences contained within each group have a high interactive relationship with each other. Also, if considering the 1RB length sequence and the 2RB length sequence, it is recommended to match A combined grouping of sequence indices whose conditions become close to zero.
但為了決定用於分組序列的更一般條件，考慮一些其他實例。However, in order to determine the more general conditions for the sequence of packets, consider some other examples.
當1RB序列係在2RB序列之最後12副載波區重疊時，兩序列的交互相關值(c (d ；s 1 、s 2 ))可表達如下。When the 1 RB sequence overlaps in the last 12 subcarrier regions of the 2 RB sequence, the cross-correlation values ( c ( d ; s 1 , s 2 )) of the two sequences can be expressed as follows.
根據方程式8，亦可推斷出若序列索引(s1 及s2 )之結合符合的項變得接近零之條件，則藉由此等序列索引指示的序列導致高交互相關。因此，若考慮1RB長度序列 及2RB長度序列，其中發生重疊之位置係未改變分組條件。According to Equation 8, it can also be inferred that if the sequence index (s 1 and s 2 ) is combined The condition that the item becomes close to zero results in a high cross-correlation by the sequence indicated by this sequence index. Therefore, if the 1 RB length sequence and the 2 RB length sequence are considered, the position where the overlap occurs is that the grouping condition is not changed.
其次，考慮當1RB長度序列及3RB長度序列在相同資源區重疊之情況。Secondly, consider the case where the 1 RB length sequence and the 3 RB length sequence overlap in the same resource region.
首先，1RB長度序列及3RB長度序列可表達如下。First, the 1 RB length sequence and the 3 RB length sequence can be expressed as follows.
在此，s1 及s2 指示係對於序列長度(N或3N)互質之索引。在此實例中，因為1RB長度序列係使用循環擴張方法產生，且3RB長度序列使用截斷序列產生方法產生，s1 可為1、2、...、10，且s2 可為1、2、...、36。並且，N1 可為11，且N2 可為37。Here, s 1 and s 2 indicate indices for the sequence length (N or 3N). In this example, since the 1 RB length sequence is generated using a cyclic expansion method, and the 3 RB length sequence is generated using the truncation sequence generation method, s 1 may be 1, 2, ..., 10, and s 2 may be 1, 2, ..., 36. Also, N 1 may be 11 and N 2 may be 37.
基於此，若1RB長度序列係在3RB長度序列之前12副載波區中重疊時，兩序列間之交互相關值可表達如下。Based on this, if the 1 RB length sequence overlaps in the 12 subcarrier regions before the 3 RB length sequence, the cross correlation values between the two sequences can be expressed as follows.
根據方程式10，應瞭解若序列索引(s1 及s3 )之結合符合的項變得接近零之條件，則由此等序列索引指示的序列導致高交互相關。因此，若考慮1RB長度序列及3RB長度序列，係建議將符合的項變得接近零之條件的序列索引之結合分組。According to Equation 10, it should be understood that if the sequence index (s 1 and s 3 ) is combined The item becomes close to zero, and the sequence indicated by this sequence index thus leads to a high cross-correlation. Therefore, if you consider the 1RB length sequence and the 3RB length sequence, it is recommended to match The item becomes a combination of sequence indices of the condition that is close to zero.
並且，為了證明與其中重疊發生之位置的關係，考慮當1RB長度序列與在3RB長度序列之第二個12副載波區內重疊的情況。在此情況下，此兩序列間之交互相關值可表達如下。Also, in order to prove the relationship with the position where the overlap occurs, it is considered that the 1 RB length sequence overlaps with the second 12 subcarrier region in the 3 RB length sequence. In this case, the cross-correlation values between the two sequences can be expressed as follows.
並且，當1RB長度序列在3RB長度序列之最後12副載波區中重疊時，交互相關值可表達如下。And, when the 1 RB length sequence overlaps in the last 12 subcarrier regions of the 3 RB length sequence, the cross correlation value can be expressed as follows.
[方程式12]
根據方程式11及12，亦可推斷出若序列索引(s1 及s3 )之結合符合的項變得接近零之條件，則由此等序列索引指示的序列導致高交互相關。因此，若考慮1RB長度序列及3RB長度序列，其中發生重疊之位置係未改變分組條件。According to Equations 11 and 12, it can also be inferred that if the sequence index (s 1 and s 3 ) is combined The item becomes close to zero, and the sequence indicated by this sequence index thus leads to a high cross-correlation. Therefore, if the 1 RB length sequence and the 3 RB length sequence are considered, the position where the overlap occurs is that the grouping condition is not changed.
根據以上所述實例，本具體實施例建議執行分組序列，以致當考慮具有N1 及N2 之長度的兩序列時，在分組成為相同組之所有序列索引中的兩序列索引符合項(s1 /N2 －s2 /N1 )變得接近零之條件。在此，N1 及N2 可為小於該產生參考信號序列之最大互質數。並且，s1 及s2 意指ZC序列之根索引，及可分別在1至(N1 －1)及1至(N2 －1)之範圍中選擇。According to the above examples, this embodiment proposes to perform a sequence of packets such that when considering two sequences having a length of N 1 and N 2 , two sequence index entries in all sequence indices that are grouped into the same group (s 1 /N 2 -s 2 /N 1 ) A condition that becomes close to zero. Here, N 1 and N 2 may be smaller than the maximum number of primes of the generated reference signal sequence. Further, s 1 and s 2 mean the root index of the ZC sequence, and may be selected from the range of 1 to (N 1 -1) and 1 to (N 2 -1), respectively.
基於此概念，考慮更一般之分組方法，其考慮各種長度序列。Based on this concept, consider a more general grouping method that considers various length sequences.
第3至5圖顯示根據本發明之一具體實施例分組序列的概念圖。Figures 3 through 5 show conceptual diagrams of packet sequences in accordance with an embodiment of the present invention.
根據此具體實施例，在例如第3圖中顯示之1RB、2RB、 3RB...的各種長度序列中，其索引符合如以上所述高交互相關條件的序列可被分組至相同組。並且，該等序列組之各組可被分配至相同胞或節點B。According to this specific embodiment, for example, 1 RB, 2 RB, shown in FIG. 3, Among the various length sequences of 3RB..., sequences whose indices conform to the high cross-correlation conditions as described above can be grouped into the same group. Also, groups of the sequence groups can be assigned to the same cell or node B.
大體上，FDM係用胞或節點B之單元進行，故藉由使用具有差異長度之序列所造成的干擾可在一胞或節點B內減至最少。因此，藉由將具有高交互相關關係之序列分配至相同胞或節點B，可將藉由使用不同長度序列造成的胞間干擾減至最少。In general, FDM is performed with cells or nodes of Node B, so interference caused by using sequences of varying lengths can be minimized within a cell or Node B. Thus, by assigning sequences with high cross-correlation to the same cell or node B, inter-cell interference caused by the use of sequences of different lengths can be minimized.
並且，本發明之另一具體實施例建議執行分組，以致該等組之各組包含各長度的至少一序列。藉由如此進行，若將序列組分配至相同胞或節點B，位於該胞或節點B之UE可被支援以使用各種長度參考信號序列。但可個別地定義特定分組方法。Moreover, another embodiment of the present invention suggests performing grouping such that each group of the groups includes at least one sequence of lengths. By doing so, if a sequence group is assigned to the same cell or Node B, the UE located at that cell or Node B can be supported to use various length reference signal sequences. However, specific grouping methods can be defined individually.
首先，分配給一組之序列之數目可與對應於參考信號序列長度的RB數目成比例。在第3圖中，係將用於1RB長度序列之一序列，用於2RB長度序列之兩序列，用於3RB長度序列之3序列等等分組。First, the number of sequences assigned to a group can be proportional to the number of RBs corresponding to the length of the reference signal sequence. In Fig. 3, one sequence for a 1 RB length sequence, two sequences for a 2 RB length sequence, a 3 sequence for a 3 RB length sequence, and the like are grouped.
其次，分配給一組之序列的數目可為一常數。在第4圖中，將用於各RB長度序列之一序列分組至相同組。Second, the number of sequences assigned to a group can be a constant. In Fig. 4, one sequence for each RB length sequence is grouped into the same group.
並且，可定義本具體實施例以執行分組，以致分配予一組的序列數目既不係與序列長度成比例，亦不保持恆定。第5圖顯示將序列分組的實例，以致將用於1RB長度序列之一序列，用於2RB長度序列之2序列，用於3RB長度序列之2序列分組，及用於4RB長度序列之3序列等等分組成 一組。Also, the specific embodiment can be defined to perform grouping such that the number of sequences assigned to a group is neither proportional to the length of the sequence nor constant. Figure 5 shows an example of grouping sequences so that one sequence for 1 RB length sequence is used for 2 sequences of 2 RB length sequence, 2 sequence packets for 3 RB length sequence, and 3 sequences for 4 RB length sequence, etc. Equal composition A group.
如以上所述，若各組包含各RB長度之至少一序列，則可定義每一組最大數目的序列。當定義每一組最大數目之序列時，可將一種用以在序列數目限制內選擇ZC序列的根索引之方法定義如下。As described above, if each group contains at least one sequence of RB lengths, the maximum number of sequences for each group can be defined. When defining the maximum number of sequences for each group, a method for selecting the root index of the ZC sequence within the number of sequence limits can be defined as follows.
若每一各RB長度序列選擇一序列，且若已針對該組選定一具有s1 之索引及N1 的長度之特定序列，可每一(具有s2 之索引)各RB長度選擇一序列，其索引使(s2 /N2 －s1 /N1 )為最接近零，其中N2 係對應於經考慮RB長度的序列長度。並且，若係每一某RB長度序列選擇2序列，且若已針對該組選定一具有s1 之索引及N1 的長度之特定序列，則每一該RB長度可選擇兩序列，以使(s2 /N2 －s1 /N1 )之項為最接近零。此可更一般化至每一各RB長度「x」的最大序列數目。If a sequence is selected for each RB length sequence, and if a specific sequence having an index of s 1 and a length of N 1 has been selected for the group, a sequence may be selected for each RB length (with an index of s 2 ), Its index is such that (s 2 /N 2 -s 1 /N 1 ) is closest to zero, where N 2 corresponds to the length of the sequence considering the length of the RB. Moreover, if a sequence of 2 is selected for each RB length sequence, and if a specific sequence having an index of s 1 and a length of N 1 has been selected for the group, then two sequences may be selected for each RB length so that ( The term s 2 /N 2 -s 1 /N 1 ) is closest to zero. This can be more generalized to the maximum number of sequences for each RB length "x".
並且，可將另一分組方法定義如下。若每一各RB長度序列選擇一序列，且若已針對該組選定一具有s1 之索引及N1 的長度之特定序列，首先，在使項(s2 /N2 －s1 /N1 )接近某值之序列中選擇某數目(y)之序列，且接著在與具有s1 之索引的序列有高交互相關關係的y序列中選擇一序列。且若每一某RB長度序列選擇2序列，且若已針對該組選定一具有s1 之索引及N1 的長度之特定序列，首先，在使項(s2 /N2 －s1 /N1 )接近某值之序列中選擇某數目(y)之序列，且接著在與具有s1 之索引的序列有高交互相關關係的y序列中選擇兩序列。此可更一般化至每一各RB長度「x」之最大序列數目。Also, another grouping method can be defined as follows. If a sequence is selected for each RB length sequence, and if a specific sequence having an index of s 1 and a length of N 1 has been selected for the group, first, the term (s 2 /N 2 -s 1 /N 1 ) a value close to the sequence of a selected number (y) of sequences, and then select a serial sequence y has a high correlation with the interaction sequence having the index of s 1 in. And if each RB length sequence selects 2 sequences, and if a specific sequence having an index of s 1 and a length of N 1 has been selected for the group, first, the term (s 2 /N 2 -s 1 /N) 1) close to the value of a selected sequence of a number (y) of sequences, and then select two sequences interact y sequence correlated with high sequence having the index of S 1 in. This can be more generalized to the maximum number of sequences of each RB length "x".
在以上實例中，係首先選定一具有s1 之索引及N1 的長 度之特定序列，且成為用以選擇該序列之剩餘部分的參考。此參考序列可被定義為1RB長度序列、2RB長度序列、3RB長度序列及等等。但在以下解釋中，假定該參考序列係3RB長度序列。並且，因為每一3RB長度之序列索引的數目係30，故用以根據發明之此具體實施例分組序列的組數目可為30。In the above example, a particular sequence having an index of s 1 and the length of N 1 is first selected and becomes a reference for selecting the remainder of the sequence. This reference sequence can be defined as a 1 RB length sequence, a 2 RB length sequence, a 3 RB length sequence, and the like. However, in the following explanation, it is assumed that the reference sequence is a 3RB length sequence. Also, since the number of sequence indices per 3 RB length is 30, the number of groups used to group the sequences according to this embodiment of the invention may be 30.
考慮用於3RB長度序列之根索引數目係30，針對某組選擇之根索引數目可決定如下。Considering the number of root indices 30 for a 3RB length sequence, the number of root indices selected for a group can be determined as follows.
[方程式13] round(用於某RB長度序列/30之根索引的數目)[Equation 13] Round (for the number of root indexes of an RB length sequence / 30)
在此，「round(z)」係捨入(round off)至一最接近z之最接近整數的函數。Here, "round(z)" is a function that rounds off to the nearest integer that is closest to z.
藉由方程式13，對於3RB及4RB長度，可選擇1序列。並且，對於5RB至6RB長度，可選擇2序列。此外，對於大於6RB長度之長度，可分別選擇3或更多序列。並且，根據本發明之一具體實施例，可有區別地定義具有少於3RB長度之長度的序列，如不使用ZC序列。藉由如此進行，針對1RB長度及2RB長度選定之序列數目可定為1。With Equation 13, one sequence can be selected for 3RB and 4RB lengths. Also, for 5 RB to 6 RB length, 2 sequences can be selected. Furthermore, for lengths greater than 6 RB in length, 3 or more sequences can be selected separately. Moreover, in accordance with an embodiment of the present invention, a sequence having a length less than 3 RBs in length can be defined differently, such as without using a ZC sequence. By doing so, the number of sequences selected for 1 RB length and 2 RB length can be set to 1.
總之，根據本具體實施例，每一組之序列數目可定義如下。In summary, according to this embodiment, the number of sequences for each group can be defined as follows.
[方程式14] {1RB，2RB，3RB，4RB，5RB，6RB，8RB，9RB，10RB，12RB，15RB，16RB，18RB，20RB，24RB，25RB，...}＝{1，1，1，1，2，2，3，3，4，5，6，6，7，8，9，9，...}[Equation 14] {1RB, 2RB, 3RB, 4RB, 5RB, 6RB, 8RB, 9RB, 10RB, 12RB, 15RB, 16RB, 18RB, 20RB, 24RB, 25RB,...}={1,1,1,1,2,2 ,3,3,4,5,6,6,7,8,9,9,...}
基於此，下表1至5顯示序列分組的實例，以致各組包含根據方程式14之序列數目，且每一各組所選定之序列滿足如以上所述之高交互相關關係。Based on this, Tables 1 to 5 below show examples of sequence groupings such that each group contains the number of sequences according to Equation 14, and the selected sequence of each group satisfies the high cross-correlation relationship as described above.
在表1至5中，因為1RB及2RB長度序列係經不同地定義，故未顯示1RB及2RB長度序列。In Tables 1 to 5, since the 1 RB and 2 RB length sequences are differently defined, the 1 RB and 2 RB length sequences are not shown.
並且，在另一實例中，考慮用於3RB長度序列之根索引數目係30，針對某組選定之根索引數目可決定如下。Also, in another example, considering the number of root indices 30 for a sequence of 3 RB lengths, the number of root indices selected for a certain group can be determined as follows.
[方程式15] floor(用於某RB長度序列/30之根索引數目)[Equation 15] Floor (for the number of root indexes of an RB length sequence / 30)
在此，「floor(z)」係使最大整數不大於z之函數。Here, "floor(z)" is a function that makes the largest integer not greater than z.
藉由方程式15，對於3至5RB長度，可選擇1序列。並且，對於6至8RB長度，可選擇2序列。此外，對於大於9RB長度之長度，可分別選擇3或更多序列。並且，根據本發明之一具體實施例，可有區別地定義具有少於3RB長度之長度的序列，如不使用ZC序列。藉由如此進行，針對1RB長度及2RB長度選定之序列數目可定為1。With Equation 15, for a length of 3 to 5 RBs, 1 sequence can be selected. Also, for a length of 6 to 8 RBs, 2 sequences can be selected. Furthermore, for lengths greater than 9 RB in length, 3 or more sequences can be selected separately. Moreover, in accordance with an embodiment of the present invention, a sequence having a length less than 3 RBs in length can be defined differently, such as without using a ZC sequence. By doing so, the number of sequences selected for 1 RB length and 2 RB length can be set to 1.
總之，根據本具體實施例，每一組之序列數目可定義如下。In summary, according to this embodiment, the number of sequences for each group can be defined as follows.
[方程式16] {1RB，2RB，3RB，4RB，5RB，6RB，8RB，9RB，10RB，12RB，15RB，16RB，18RB，20RB，24RB，25RB，...}＝{1，1，1，1，1，2，2，3，3，4，5，6，7，7，9，9，...}[Equation 16] {1RB, 2RB, 3RB, 4RB, 5RB, 6RB, 8RB, 9RB, 10RB, 12RB, 15RB, 16RB, 18RB, 20RB, 24RB, 25RB,...}={1,1,1,1,1,2 , 2,3,3,4,5,6,7,7,9,9,...}
基於此，下表6至8顯示序列分組的實例，以致各組包含根據方程式16之序列數目，且每一各組選定之序列滿足如以上所述之高交互相關關係。Based on this, Tables 6 through 8 below show examples of sequence groupings such that each group contains the number of sequences according to Equation 16, and each selected group of sequences satisfies the high cross-correlation relationship as described above.
如類似表1至5，在表6至8中，因為1RB及2RB長度序列係不同地定義，故未顯示1RB及2RB長度序列。As in Tables 1 to 5, in Tables 6 to 8, since the 1 RB and 2 RB length sequences are differently defined, the 1 RB and 2 RB length sequences are not shown.
在本發明之另一具體實施例中，由於各種原因可預定每一各組之序列的最大數目。下表9及10顯示當每一組之序列的最大數目限於5序列之情況的實例。In another embodiment of the invention, the maximum number of sequences for each group can be predetermined for various reasons. Tables 9 and 10 below show examples of the case where the maximum number of sequences of each group is limited to 5 sequences.
並且，在另一實例中，可將序列之最大數目預定成4。下表11及12顯示此情況。And, in another example, the maximum number of sequences can be predetermined to four. Tables 11 and 12 below show this.
並且，在另一實例中，可將序列的最大數目預定成3。下表13及14顯示此情況。And, in another example, the maximum number of sequences can be predetermined to be three. Tables 13 and 14 below show this.
並且，在另一實例中，可將序列的最大數目預定成2。下表15及16顯示此情況。And, in another example, the maximum number of sequences can be predetermined to be two. Tables 15 and 16 below show this.
並且，在另一實例中，可將序列的最大數目預定成1。下表17顯示此情況。And, in another example, the maximum number of sequences can be predetermined to be one. Table 17 below shows this.
考慮組態之複雜性及用以支援UE使用可變長度參考信號序列的靈活性，本發明之一具體實施例建議執行分組，以致該等‘組之各組包含一對應於1至5RB長度之各長度的基本序列，及對應於6RB或更多長度之各長度的兩基本序列。此對應於表15及16。Considering the complexity of the configuration and the flexibility to support the UE in using variable length reference signal sequences, one embodiment of the present invention suggests performing grouping such that each of the 'groups' includes a length corresponding to 1 to 5 RBs. A basic sequence of lengths and two basic sequences corresponding to lengths of 6 RB or more in length. This corresponds to Tables 15 and 16.
在此，基本序列意指藉由根索引所指示之ZC序列，且係用以應用對應於各種循環平移值之循環平移。並且，可 將具有循環平移的基本序列用作一參考信號序列。Here, the basic sequence means the ZC sequence indicated by the root index, and is used to apply a cyclic translation corresponding to various cyclic translation values. And can A basic sequence with cyclic translation is used as a reference signal sequence.
上表1至17係當根索引係藉由(s1 /N1 －s2 /N2 )之項選擇時之情況。但在本發明之另一具體實施例中，根索引可藉由實際交互相關值計算來選擇。下表18至20對應於表6至8，但根索引係藉由實際交互相關值計算來選擇。Tables 1 to 17 above are the cases when the root index is selected by the term (s 1 /N 1 -s 2 /N 2 ). However, in another embodiment of the invention, the root index can be selected by actual cross-correlation value calculations. Tables 18 through 20 below correspond to Tables 6 through 8, but the root index is selected by the actual cross-correlation value calculation.
在此情況下，若每一各組之序列的最大數目係預定至5，該分組可執行如下表21及22中顯示。表21及22亦可為當基本序列藉由實際交互相關計算來選擇時之情況。In this case, if the maximum number of sequences for each group is predetermined to 5, the packet can be displayed as shown in Tables 21 and 22 below. Tables 21 and 22 can also be the case when the basic sequence is selected by actual cross-correlation calculations.
在另一實例，若每一各組序列的最大數目係預定至4，則該分組可執行如下表23及24中顯示。表23及24亦係當基本序列藉由實際交互相關計算來選擇時之情況。In another example, if the maximum number of each set of sequences is predetermined to four, the grouping can be performed as shown in Tables 23 and 24 below. Tables 23 and 24 are also the case when the basic sequence is selected by actual cross-correlation calculations.
在另一實例，若每一各組之序列的最大數目係預定至3，則該分組可執行如下表25及26中顯示。表25及26亦係當基本序列藉由實際交互相關計算來選擇時之情況。In another example, if the maximum number of sequences for each group is predetermined to three, the grouping can be performed as shown in Tables 25 and 26 below. Tables 25 and 26 are also the case when the basic sequence is selected by actual cross-correlation calculations.
在另一實例，若每一各組之序列的最大數目係預定至2，則該分組可執行如下表27中顯示。表27亦係當基本序列藉由實際交互相關計算來選擇時之情況。In another example, if the maximum number of sequences for each group is predetermined to two, the grouping can be performed as shown in Table 27 below. Table 27 is also the case when the basic sequence is selected by actual cross-correlation calculations.
在另一實例，若每一各組之序列的最大數目係預定至1，則該分組可執行如下表28中顯示。表28亦係當基本序列藉由實際交互相關計算來選擇時之情況。In another example, if the maximum number of sequences for each group is predetermined to one, the grouping can be performed as shown in Table 28 below. Table 28 is also the case when the basic sequence is selected by actual cross-correlation calculations.
對於以上情況，可根據每一各組之序列分配數目和各長度來重新組織該等表。For the above case, the tables can be reorganized according to the number of sequences and the lengths of each group.
對於本發明之另一實例，以上表可擴張至100RB長度，且下表顯示此實例。在此實例中，用於5RB長度或更少之根索引數目(v)的最大數目係設定至1，而用於比5RB長之長度的根索引數目(v)之最大數目係設定至2。For another example of the invention, the above table can be expanded to a length of 100 RB, and the table below shows this example. In this example, the maximum number of root index numbers (v) for 5 RB length or less is set to 1, and the maximum number of root index numbers (v) for lengths longer than 5 RB is set to 2.
基於此等概念，本發明提供一種用以使用ZC序列產生參考信號序列之方法，如以下所述。Based on these concepts, the present invention provides a method for generating a reference signal sequence using a ZC sequence, as described below.
為了產生參考信號序列，本發明之一具體實施例定義一用於為聯合循環平移的特定基本序列。在此具體實施例中，基本序列係使用具有某根索引(在下文中之「q」)之ZC序列定義。並且，該特定基本序列係從基本序列組中選出，且該基本序列組之各者包含具有如以上所述之一高交互相關關係的基本序列。因此，若希望選擇具有「q」索引之特定基本序列，則「q」應考慮該組索引(以下之「u」)及在各組內之基本序列數目索引(下文中之「v」)來選擇。即「q」應為「u」及「v」之函數。To generate a reference signal sequence, one embodiment of the present invention defines a particular base sequence for translation for a joint cycle. In this particular embodiment, the base sequence is defined using a ZC sequence having a certain index (hereinafter "q"). And, the particular basic sequence is selected from a set of basic sequences, and each of the sets of basic sequences comprises a base sequence having a high cross-correlation relationship as described above. Therefore, if you want to select a specific base sequence with a "q" index, then "q" should consider the group index ("u" below) and the index of the number of basic sequences in each group ("v" below). select. That is, "q" should be a function of "u" and "v".
並且，在已選定具有根索引「q」之特定基本序列後，接著可將對應於各種循環平移值之循環平移應用至所選定基本序列。And, after a particular base sequence having the root index "q" has been selected, a cyclic translation corresponding to various cyclic translation values can then be applied to the selected base sequence.
若更明確地考慮「q」、「u」及「v」間之關係，則「q」可藉由以下方程式獲取。以下方程式17及18係用以選擇索引「q」以符合項(s1 /N1 -s2 /N2 )變得接近零之條件。If the relationship between "q", "u" and "v" is more explicitly considered, "q" can be obtained by the following equation. Equations 17 and 18 below are used to select the index "q" to satisfy the condition that the term (s 1 /N 1 -s 2 /N 2 ) becomes close to zero.
其中 among them
[方程式18]
其中 among them
在此，係用於產生第q根ZC序列之目標ZC序列產生長度，且係由小於對應參考信號序列大小之最大質數給定。即，基本序列係藉由循環擴張方法產生。here, The length of the target ZC sequence used to generate the qth ZC sequence, and It is given by the largest prime number smaller than the size of the corresponding reference signal sequence. That is, the basic sequence is generated by a cyclic expansion method.
並且，係由小於參考序列大小之最大質數給定的長度，例如，3RB長度。若分組係基於3RB長度，則係31。「round(z)」係捨入至最接近z之最接近整數的函數，且「floor(z)」係使最大整數不大於z之函數。and, A length given by a maximum prime number less than the size of the reference sequence, for example, 3 RB length. If the grouping is based on 3RB length, then Department 31. "round(z)" is a function that is rounded to the nearest integer closest to z, and "floor(z)" is a function that makes the largest integer not greater than z.
並且，根據本發明之另一具體實施例，若ZC序列係基於截斷方法產生，則可由大於對應參考信號序列大小之最小質數給定。並且，在此情況下，可為由大於參考序列大小的最小質數給定之長度，例如3RB長度。若分組係基於3RB長度，則可為37。Moreover, according to another embodiment of the present invention, if the ZC sequence is generated based on a truncation method, then It can be given by the smallest prime number greater than the size of the corresponding reference signal sequence. And, in this case, It may be a length given by a minimum prime number greater than the size of the reference sequence, such as a 3 RB length. If the grouping is based on 3RB length, then Can be 37.
並且，根據方程式17和18，第「q」ZC序列(x q (m )之第「m」)元素可表達如下。Further, according to Equations 17 and 18, the "q" ZC sequence (the "m"th element of x q ( m )) can be expressed as follows.
因為「round(y)」及「floor(y+0.5)」係實際上相等，方程式17及18具有相同意義。在方程式17及18中，項(-1) floor(round(y)-y) 意指若「y」在其小數點右邊第一個數字具有0.5或更大值，則(-1) floor(round(y)-y) 可計算為「1」，且若「y」在其小數點右邊第 一個數字具有小於0.5之值，則(-1) floor(round(y)-y) 可計算為「-1」。因此，(-1) floor(round(y)-y) 可用(-1) floor(round(y)) +1 或具有相同意義之任何其他相等項來取代。Since "round(y)" and "floor(y+0.5)" are actually equal, Equations 17 and 18 have the same meaning. In Equations 17 and 18, the term (-1) floor(round(y)-y) means that if "y" has a value of 0.5 or greater in the first digit to the right of its decimal point, then (-1) floor( Round(y)-y) can be calculated as "1", and if "y" has a value less than 0.5 at the right of its decimal point, then (-1) floor(round(y)-y) can be calculated It is "-1". Thus, (-1) floor(round(y)-y) can be replaced with (-1) floor(round(y)) + 1 or any other equivalent with the same meaning.
在以上實例中，當分組係基於3RB長度而針對大於3RB長度之長度執行，且當ZC序列係基於循環擴張方法產生時，可為31。另外，當ZC序列係基於截斷方法產生時，可為37。並且，當分組係基於4RB長度而針對大於4RB長度之長度執行，且當ZC序列係基於循環擴張方法產生時，可為47。另外，當ZC序列係基於截斷方法產生時，可為49。並且，此可容易用於其他長度為基礎的分組執行。In the above example, when the grouping is performed for a length greater than 3 RB length based on the 3RB length, and when the ZC sequence is generated based on the cyclic expansion method, Can be 31. In addition, when the ZC sequence is generated based on the truncation method, Can be 37. And, when the packet is performed for a length greater than 4 RB length based on the 4 RB length, and when the ZC sequence is generated based on the cyclic expansion method, Can be 47. In addition, when the ZC sequence is generated based on the truncation method, Can be 49. Also, this can be easily applied to other length-based packet executions.
上述表可藉由方程式17及18獲取。以下實例係根據方程式17及18選擇根索引之部分。The above table can be obtained by Equations 17 and 18. The following examples select portions of the root index according to Equations 17 and 18.
首先，若Nreference，zc =31，當(1)Nzc=47，(2)Nzc=71，(2)Nzc=21時用以選擇第一組(「u」=0)之方法係如下。在以下實例中，係使用方程式18。First, if N reference, zc = 31, the method for selecting the first group ("u" = 0) when (1) Nzc = 47, (2) Nzc = 71, and (2) Nzc = 21 is as follows. In the following examples, Equation 18 is used.
(1)Nreference，zc
=31，Nzc RS
=47，u=0，v=0；y=47/31，
因此，對於4RB長度，在第一組(u=0)內之第一基本序列數目(v=0)係2(q=2)。Therefore, for the 4 RB length, the number of first basic sequences (v = 0) in the first group (u = 0) is 2 (q = 2).
(2)Nreference，zc
=31，Nzc RS
=71，u=0，v=0；y=71/31，
因此，對於6RB長度，在第一組(u=0)內之第一基本序列數目(v=0)係2(q=2)。Therefore, for the 6 RB length, the number of first basic sequences (v = 0) in the first group (u = 0) is 2 (q = 2).
(3)Nreference，zc
=31，Nzc RS
=211，u=0，v=0；y=211/31，
因此，對於18RB長度，在第一組(u=0)內之第一基本序列數目(v=0)係2(q=7)。Therefore, for the 18 RB length, the first number of basic sequences (v = 0) in the first group (u = 0) is 2 (q = 7).
對於以上情況，所選定根索引(q)對應於在表6至8中基於3RB長度產生的資料。For the above case, the selected root index (q) corresponds to the data generated based on the 3 RB length in Tables 6 to 8.
在另一實例中，若Nreference，zc =47(基於4RB長度)，當(1)Nzc=59，(2)Nzc=107，(2)Nzc=139時用以選擇第二組(「u」=1)之方法係如下。在以下實例中，係使用方程式18。In another example, if N reference, zc = 47 (based on 4 RB length), when (1) Nzc = 59, (2) Nzc = 107, (2) Nzc = 139 is used to select the second group ("u The method of =1) is as follows. In the following examples, Equation 18 is used.
(1)Nreference，zc
=47，Nzc RS
=59，u=1，v=0；y=59/47*2，
因此，對於5 RB長度，第二組(u=1)內之第一基本序列數目(v=0)係3(q=3)。Therefore, for a 5 RB length, the number of first basic sequences (v = 0) in the second group (u = 1) is 3 (q = 3).
(2)Nreference，zc
=47，Nzc RS
=107，u=1，v=0；y=107/47*2，
因此，對於9RB長度，第二組(u=1)內之第一基本序列數目(v=0)係5(q=5)。Thus, for a 9 RB length, the number of first base sequences (v = 0) in the second group (u = 1) is 5 (q = 5).
(3)Nreference，zc
=47，Nzc RS
=139，u=1，v=0；y=139/47*2，
因此，對於12 RB長度，第二組(u=1)內之第一基本序列數目(v=0)係6(q=6)。Thus, for a 12 RB length, the number of first base sequences (v = 0) in the second group (u = 1) is 6 (q = 6).
在本發明另一具體實施例中，方程式17及18可被取代如下。In another embodiment of the invention, equations 17 and 18 can be replaced as follows.
其中 among them
其中 among them
因為「round(y)」及「floor(y+0.5)」係實際上相等，方程式20及21具有相同意義。Since "round(y)" and "floor(y+0.5)" are actually equal, equations 20 and 21 have the same meaning.
在本發明另一具體實施例中，方程式17及18可被取代如下。In another embodiment of the invention, equations 17 and 18 can be replaced as follows.
其中 among them
其中 among them
此等方程式對應於針對上述表解釋的各種分組方法。These equations correspond to the various grouping methods explained for the above table.
若序列(其可分組至一組內)的最大數目係預定為2，則方程式17至18、20至21及22至23可分別簡化如下。If the maximum number of sequences (which can be grouped into a group) is predetermined to be 2, then Equations 17 to 18, 20 to 21, and 22 to 23 can be simplified as follows, respectively.
[方程式24]q =round (y )+v ．(-1) floor (2y ) [Equation 24] q = round ( y ) + v . (-1) floor (2 y )
其中 among them
[方程式25]q =floor (y +0.5)+v ．(-1) floor (2y ) [Equation 25] q = floor ( y +0.5) + v . (-1) floor (2 y )
其中 among them
[方程式26]q =round (y )+v ．(-1) floor (2y ) [Equation 26] q = round ( y ) + v . (-1) floor (2 y )
其中 among them
[方程式27]q =floor (y +0.5)+v ．(-1) floor (2y ) [Equation 27] q = floor ( y +0.5) + v . (-1) floor (2 y )
其中 among them
[方程式28]q =round (y )+v ．(-1) floor (2y ) [Equation 28] q = round ( y ) + v . (-1) floor (2 y )
其中 among them
[方程式29]q =floor (y +0.5)+v ．(-1) floor (2y ) [Equation 29] q = floor ( y +0.5) + v . (-1) floor (2 y )
其中 among them
方程式17至18、20至21及22至23係用以選擇ZC根索引以符合使項(s1 /N1 -s2 /N2 )變得接近零之條件。並且，方程式24至29係當使各長度之每一組的序列最大數目限於2時，用以選擇根索引ZC根索引。Equations 17 to 18, 20 to 21, and 22 to 23 are used to select the ZC root index to satisfy the condition that the term (s 1 /N 1 -s 2 /N 2 ) becomes close to zero. Also, Equations 24 to 29 are used to select the root index ZC root index when the maximum number of sequences of each of the respective lengths is limited to two.
但，若使此等方程式更一般化以致項(s1 /N1 -s2 /N2 )變得接近一特定值(T)時，可獲得以下方程式。在此情況下，值「T」可為0、1/2、-1/2、1/3、-1/3。但值「T」可具有其他值。However, if these equations are made more general so that the term (s 1 /N 1 -s 2 /N 2 ) becomes close to a specific value (T), the following equation can be obtained. In this case, the value "T" can be 0, 1/2, -1/2, 1/3, -1/3. But the value "T" can have other values.
在以下方程式中，當各長度之每一組的序列最大數目可具有最大值時，方程式30及31係用以選擇ZC根索引。並且，當使各長度之每一組的序列最大數目限於2時，方程式32及33係用以選擇ZC根索引。In the following equation, Equations 30 and 31 are used to select the ZC root index when the maximum number of sequences for each of the lengths can have a maximum value. Also, when the maximum number of sequences for each of the respective lengths is limited to two, Equations 32 and 33 are used to select the ZC root index.
[方程式30]
其中 among them
其中 among them
[方程式32]q =round (y )+v ．(-1) floor (2y ) [Equation 32] q = round ( y ) + v . (-1) floor (2 y )
其中 among them
[方程式33]q =floor (y +0.5)+v ．(-1) floor (2y ) [Equation 33] q = floor ( y +0.5) + v . (-1) floor (2 y )
其中 among them
熟習此項技術人士應瞭解本發明可依其他特定形式執行而不脫離本發明之精神及基本特徵。因此，以上具體實施例係視為在所有態樣中皆為說明性而非限制性。本發明之範疇應由所附申請專利範圍之合理解釋來決定，且在本發明之等效範疇內的所有變化皆包括在本發明的範疇中。It will be appreciated by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and scope of the invention. The above specific embodiments are, therefore, to be considered in all respect The scope of the invention is to be determined by a reasonable interpretation of the scope of the appended claims, and all modifications within the scope of the invention are included in the scope of the invention.
根據本發明之具體實施例，可使藉由使用可變長度序 列造成的胞間干擾減至最少。並且，若將各分組基本序列分配予特定胞或節點B，UE可將可變長度序列用作參考信號。According to a specific embodiment of the present invention, variable length order can be used The intercellular interference caused by the column is minimized. And, if each packet basic sequence is assigned to a specific cell or Node B, the UE can use the variable length sequence as a reference signal.
此等方法係適用於3GPP LTE(第三代合夥專案長期進化)系統。但熟習此項技術人士可易於理解此等方法可用於將各種長度序列用作參考信號序列之任何無線通信系統。These methods are applicable to the 3GPP LTE (3rd Generation Partnership Project Long Term Evolution) system. Those skilled in the art will readily appreciate that such methods can be used in any wireless communication system that uses various length sequences as reference signal sequences.
儘管本發明之較佳具體實施例已揭示用於說明目的，熟習此項技術人士應會瞭解在不脫離所附申請專利範圍中揭示之本發明之範疇或精神下，各種修改、增加及置換皆屬可行。Although the preferred embodiment of the present invention has been disclosed, it will be understood by those skilled in the art that various modifications, additions and substitutions may be made without departing from the scope or spirit of the invention disclosed in the appended claims. It is feasible.
本發明所包括之附圖提供對本發明、其說明性具體實施例之進一步瞭解，且連同說明用以解說本發明之原理。The accompanying drawings, which are included in the claims
在圖式中：第1圖顯示用以解釋經截斷序列產生方法之概念圖。In the drawings: Figure 1 shows a conceptual diagram for explaining the method of generating truncated sequences.
第2圖顯示用以解釋使用填充部分之產生方法的概念圖。Fig. 2 is a conceptual diagram for explaining a method of generating a filled portion.
第3至5圖顯示根據本發明之一具體實施例分組序列的概念圖。Figures 3 through 5 show conceptual diagrams of packet sequences in accordance with an embodiment of the present invention.
圖中無元件No components in the picture
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| US88806507P | 2007-02-02 | 2007-02-02 | |
| KR20070047494 | 2007-05-16 | ||
| KR1020070099707A KR20080072508A (en) | 2007-02-02 | 2007-10-04 | Method for allocating sequence having various resource block length, and method for grouping sequence for the same |
| KR1020070108226A KR20080072511A (en) | 2007-02-02 | 2007-10-26 | Method for allocating sequence having various resource block length, and method for grouping sequence for the same |
| KR1020070109089A KR20080072512A (en) | 2007-02-02 | 2007-10-29 | Method for allocating sequence having various resource block length, and method for grouping sequence for the same |
| US98438607P | 2007-11-01 | 2007-11-01 | |
| US1958808P | 2008-01-07 | 2008-01-07 |
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| JP5712957B2 (en) * | 2012-03-23 | 2015-05-07 | アイコム株式会社 | COMMUNICATION DEVICE AND COMMUNICATION METHOD |
| US11218994B2 (en) | 2016-12-06 | 2022-01-04 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for demodulating shared reference signal, terminal device, and network device |
| CN108242987B (en) * | 2016-12-23 | 2022-09-13 | 中兴通讯股份有限公司 | Reference signal sending method, base station, configuration determining method and terminal |
| CN108282309B (en) * | 2017-01-06 | 2021-09-07 | 华为技术有限公司 | Reference signal transmission method and device |
| CN110072286A (en) * | 2018-01-23 | 2019-07-30 | 株式会社Ntt都科摩 | For generating the method and corresponding user terminal, base station of reference signal sequence |
| WO2020220176A1 (en) * | 2019-04-28 | 2020-11-05 | 华为技术有限公司 | Communication method and apparatus |
| CN112332943B (en) * | 2019-08-01 | 2022-02-18 | 华为技术有限公司 | Method and device for processing reference signal |
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| US5920591A (en) * | 1995-07-27 | 1999-07-06 | Oki Electric Industry Co., Ltd. | Spreading code generator and CDMA communication system |
| US6226337B1 (en) * | 1993-09-10 | 2001-05-01 | Deutsche Thomson-Brandt Gmbh | Method for the transmission of reference signals in an OFDM system |
| US6542478B1 (en) * | 1998-03-23 | 2003-04-01 | Samsung Electronics, Co., Ltd. | Device and method for generating PN sequence in CDMA communication system |
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| US6226337B1 (en) * | 1993-09-10 | 2001-05-01 | Deutsche Thomson-Brandt Gmbh | Method for the transmission of reference signals in an OFDM system |
| US5920591A (en) * | 1995-07-27 | 1999-07-06 | Oki Electric Industry Co., Ltd. | Spreading code generator and CDMA communication system |
| US6542478B1 (en) * | 1998-03-23 | 2003-04-01 | Samsung Electronics, Co., Ltd. | Device and method for generating PN sequence in CDMA communication system |
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