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Resource mapping and code division multiplexing method and device

A technology of resource mapping and mapping scheme, applied in the field of communication, can solve the problems of unbalanced output power of pilot symbols and interference of pilot symbols, and achieve the effect of realizing resource mapping, reducing interference and improving the problem of unbalanced output power.

Active Publication Date: 2011-04-13
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For resource mapping, since each cell adopts the same mapping scheme, the pilot symbols of users at the cell border will be strongly interfered; while in codeword design, since the same codeword is used on the subcarriers where each pilot symbol is located, Then there is the problem of unbalanced output power of pilot symbols

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  • Resource mapping and code division multiplexing method and device
  • Resource mapping and code division multiplexing method and device
  • Resource mapping and code division multiplexing method and device

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Embodiment 1

[0034] see figure 1 , this embodiment provides a resource mapping method, the method flow is as follows:

[0035] 101: Select a mapping scheme from at least two preset mapping schemes, and the pilot symbol with the strongest transmission power corresponding to the selected mapping scheme is the same as the pilot symbol with the highest transmission power corresponding to the mapping scheme selected by at least one neighboring cell. Pilot symbols with strong transmit power are staggered from each other in frequency and / or time;

[0036] 102: Perform resource mapping according to the selected mapping scheme.

[0037] In the method provided in this embodiment, each cell selects a mapping scheme among at least two preset mapping schemes to realize resource mapping. Since the pilot symbol with the strongest transmit power corresponding to the selected mapping scheme is at least The pilot symbols with the strongest transmission power corresponding to the mapping scheme selected by...

Embodiment 2

[0039] This embodiment provides a resource mapping method. For the convenience of description, this embodiment uses figure 2 The shown time-frequency resource block is taken as an example, and the subcarrier where the pilot symbol is located is called a pilot subcarrier, and the resource mapping method provided by this embodiment is described.

[0040] figure 2 Among them, a subframe includes 2 slots (time slots), and there are 7 OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbols in each slot; in each slot, there are 12x7 RE (Resource Element, resource particle). The pilot resource allocation method adopted by this resource block is: introducing CDM (Code Division Multiplexing, Code Division Multiplexing) in the time domain, which can provide 4 orthogonal pilot resources, such as figure 2 The first resource element in ; FDM (Frequency Division Multiplexing, frequency division multiplexing) is introduced in the frequency d...

Embodiment 3

[0086] see Figure 4 , this embodiment provides a resource mapping device, the device includes:

[0087] The storage module 401 is used to store at least two mapping schemes, the mapping scheme is the corresponding relationship between the spatial layer number of the transmission pilot symbol, the codeword used by the pilot symbol, and the subcarrier where the pilot symbol is located;

[0088] A selection module 402, configured to select a mapping scheme from at least two mapping schemes stored in the storage module 401, and the mapping scheme corresponding to the selected mapping scheme has the strongest transmission power and the mapping between the pilot symbol with the strongest transmission power and at least one adjacent cell selection The pilot symbols with the strongest transmit power corresponding to the scheme are staggered in frequency and / or time;

[0089] The mapping module 403 is configured to perform resource mapping according to the mapping scheme selected by ...

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Abstract

The invention discloses a resource mapping and code division multiplexing method and device, belonging to the communication field. The resource mapping method comprises the steps of: selecting one mapping scheme from at least two mapping schemes, mutually staggering a pilot frequency symbol with strongest transmitting power, corresponding to the selected mapping scheme, with a pilot frequency symbol with strongest transmitting power, corresponding to the mapping scheme selected by the least one adjacent cell; and carrying out resource mapping according to the selected mapping scheme. Through selecting one mapping scheme from the at least two mapping schemes by each cell, the invention realizes resource mapping, and effectively reduces the interferences of the pilot frequency symbols of the users at the boundary of the cell; and through carrying out vector exchange on an orthogonal matrix, a plurality of different codeword sequences are obtained, the codeword design is realized, and output power imbalance of the pilot frequency symbols can be effectively improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for resource mapping and code division multiplexing. Background technique [0002] In the LTE (Long Term Evolution, Long Term Evolution) technology, the transmitting end provides pilot symbols to the receiving end, and the user equipment at the receiving end can obtain channel estimation values ​​required for user data demodulation according to the received pilot symbols. In order to ensure the transmission of the pilot symbols, resource mapping needs to be performed to determine the corresponding relationship between the spatial layer number for transmitting the pilot symbols, the subcarriers where the pilot symbols are located, and the codewords used for the pilot symbols. As for the codewords in the resource mapping, there may be multiple design schemes. [0003] In the prior art, when implementing resource mapping, each cell adopts the same mapping schem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/24H04W72/04H04L1/16H04L1/18
CPCH04L5/005H04L5/006H04L5/0007H04L5/0048H04L5/0023H04J13/18H04L27/2613H04L27/262H04L5/0073H04L5/003H04J13/0003H04W72/0453
Inventor 孙卫军周永行
Owner HUAWEI TECH CO LTD
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