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A kind of resource allocation method and device for OFDM relay system

A relay system and resource allocation technology, applied in wireless communication, electrical components, etc., to achieve the effect of narrowing the scope and reducing the complexity

Active Publication Date: 2018-10-23
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This application provides a resource allocation method and device for an OFDM relay system, with the purpose of solving the problem of reducing the complexity of resource allocation under the premise of ensuring the performance of the OFDM relay system

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  • A kind of resource allocation method and device for OFDM relay system
  • A kind of resource allocation method and device for OFDM relay system
  • A kind of resource allocation method and device for OFDM relay system

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Embodiment Construction

[0043] The embodiment of the present application discloses a resource allocation method and device for an OFDM relay system, which can be applied in the OFDM relay system. like figure 1 As shown, in the OFDM relay system, there are K relays between the source node S and the destination node D, and each relay forwards the message received from the source node to the destination node. There are two hops in the relay transmission process: in the first hop, the source node S sends a message to the relay node through all subcarriers; in the second hop, the relay forwards the signal to the destination node.

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by p...

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Abstract

This application provides a resource allocation method and device for an OFDM relay system. Based on the channel gain from each subcarrier to the relay, all subcarriers are divided into M subcarrier groups, wherein each subcarrier group has It includes P subcarriers, and, according to the M subcarrier groups, the objective function of the capacity of the OFDM relay system is simplified, in the simplified objective function, the minimum calculation unit is the subcarrier grouping, and then using the The simplified objective function is to pair the M subcarrier groups, because the simplified objective function no longer uses the subcarrier as the minimum operation unit, but uses the subcarrier group as the minimum operation unit. Compared with the subcarrier, The subcarrier group reduces the scope of carrier pairing, and therefore, can reduce the complexity of subcarrier pairing without affecting system performance.

Description

technical field [0001] The present application relates to the communication field, and in particular to a resource allocation method and device for an OFDM relay system. Background technique [0002] In broadband wireless transmission systems, orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) technology can effectively combat the problems of frequency selective fading and inter-symbol interference, and can provide high spectrum efficiency. Combining relay technology with OFDM transmission technology can improve system capacity more effectively. In the OFDM relay system, the subcarriers in the relay node can relay the signals on the subcarriers in the source node in the form of AF or DF, and the capacity of the OFDM relay carrier depends on the pairing mode of the relay subcarriers and the subcarrier The power allocation strategy of the carrier. [0003] Therefore, how to reasonably allocate the subcarriers to the two hops in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/06
CPCH04W72/0453H04W72/563
Inventor 刘志永王一蓉邓伟王艳茹范军丽阮春青刘凯明
Owner BEIJING UNIV OF POSTS & TELECOMM
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