Multi-user code superposition-based code matrix determining method and device

A coding matrix and user equipment technology, applied in the field of communication, can solve problems such as difficult multi-user detection performance improvement

Active Publication Date: 2016-07-13
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a coding matrix determination method and device based on multi-user coding superposition, thereby solving the problem that it is not easy to improve multi-user detection performance when the coding methods corresponding to multiple users have equal diversity degrees

Method used

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  • Multi-user code superposition-based code matrix determining method and device

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Effect test

Embodiment 1

[0151] Embodiment 1. For N=2, the maximum number of users that can be supported by theoretical capacity enhancement is 3, which is only 1 more than the number of orthogonal multiplexing users 2. Therefore, the actual number of non-orthogonal multiplexing user equipments It is equal to the number of theoretical non-orthogonal multiplexing user equipments, and the second coding matrix determined by the network device is equal to the first coding matrix.

Embodiment 2

[0152] Embodiment 2. For N=3, the maximum number of users that can be supported by its theoretical capacity enhancement is 7, which is 4 more than the number of users of orthogonal multiplexing 3. Therefore, the actual number of non-orthogonal multiplexing users can be 4 or 5 or 6 or 7, depending on how much complexity the system can support. Correspondingly, the actual PDMA coding matrix can have various forms, such as and is equivalent to that corresponding to formula (6) In this case, the capacity multiplexing gains corresponding to different second encoding matrices are shown in Table 2.

[0153] M’

η(%)

4

133

5

167

[0154] 6

200

7

233

[0155] Table 2

[0156] (1) Assuming that N=3, the number of multi-users that the system can actually support is 6, then:

[0157] If the above method 31 is adopted, try to ensure that there is a reasonable degree of inconsistent diversity among the six user...

Embodiment 3

[0169] Embodiment 3. For N=4, the number of multi-user multiplexing corresponding to its theoretical capacity improvement is 15, which is 11 more than the number of users of orthogonal multiplexing 4. Therefore, the actual number of non-orthogonal multiplexing users can be 5 to 11, and the specific number will depend on the complexity that the system can support. Correspondingly, the actual PDMA coding matrix can have 11 forms, namely and It is equivalent to the first encoding matrix shown in formula (8). In this case, capacity multiplexing gains corresponding to different second encoding matrices are shown in Table 3.

[0170] M’

η(%)

5

125

6

150

7

175

8

200

9

225

10

250

11

275

12

300

13

325

14

350

15

375

[0171] table 3

[0172] Below to As an example, the method provided by the embodiment of the present invention is described,...

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Abstract

The embodiments of the invention provide a multi-user code superposition-based code matrix determining method and device. With the method and device adopted, the problem of little possibility of multi-user detection performance improvement which is caused by a situation that code modes corresponding to multiple users have an equal diversity degree can be solved. The method includes the following steps that: a network device determines the number M of user devices which actually multiplex N transmission resources, wherein N and M satisfy the inequation that N+1<=M<=2<N>-1; the network device determines a second code matrix which is formed by code superposition and indicates that M user devices perform multiplexing on the N transmission resources according to a configured first code matrix which is formed by code superposition which indicates 2<N>-1 user devices perform multiplexing on the N transmission resources, wherein each column in the first code matrix is corresponding to a different code mode, and at least two columns in the first code matrix have unequal diversity degrees, and at least two columns in the second code matrix have unequal diversity degrees.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for determining a coding matrix based on multi-user coding superposition. Background technique [0002] The traditional mobile communication system adopts an orthogonal method to realize multi-user multiplexing. For example, the first generation mobile communication system (The First Generation, 1G) adopts the frequency division multiple access technology (Frequency Division Multiple Access, FDMA) access technology, 2G Global System for Mobile communication (GSM) adopts Time Division Multiple Access (TDMA) access technology, 3G adopts Code Division Multiple Access (CDMA) access technology, 4G adopts Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplex) , OFDM) access technology. The advantage of the orthogonal method is that the interference between multiple users is relatively small, and the disadvantage is that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L5/00
Inventor 康绍莉戴晓明秦飞孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD
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