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An efficient capacity optimization method for multi-antenna transmission under feedback constraints

A multi-antenna transmission and effective capacity technology, applied in radio transmission systems, transmission systems, electrical components, etc., can solve problems such as increased feedback channel capacity, affecting communication quality, and limited channel capacity improvement

Active Publication Date: 2020-12-29
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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Problems solved by technology

In this way, the channel state cannot be perfectly known under the condition of limited feedback amount, and the improvement of channel capacity is limited
Secondly, using feedback at the receiving end can improve the quality of the channel, but if the transmit power is constant and the feedback amount is increased, the capacity of the main channel will increase, but at the same time it will lead to an increase in the capacity of the feedback channel; when the amount of feedback is too large, the channel’s The effective capacity will be reduced, which will affect the quality of communication
In addition, if the amount of feedback is increased, the system complexity will increase

Method used

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  • An efficient capacity optimization method for multi-antenna transmission under feedback constraints
  • An efficient capacity optimization method for multi-antenna transmission under feedback constraints
  • An efficient capacity optimization method for multi-antenna transmission under feedback constraints

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] Such as figure 1 As shown, the system model of this embodiment includes a source node S, and the source node has four antennas A 1 ~A 4 , a destination node D, each antenna sends data information through beamforming; the channel state information of each antenna is independently and identically distributed.

[0021] The flow of this embodiment is as follows figure 2 As shown, the details are as follows.

[0022] 1) The system model contains a source node S, which has 4 antennas A 1 ~A 4, 1 destination node D, each antenna of the source node sends the same data information to the desti...

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Abstract

The invention discloses an effective capacity optimization method of multi-antenna transmission under feedback limitation. Firstly, a source node pre-codes the information, and then performs data transmission with a destination node in a beam forming manner. In the precoding of the source node, channel state information needs to be obtained, so that the destination node performs channel estimationat first, and feeds back the estimated channel state information to the source node after quantifying the same. As the accuracy of channel quantization is higher, the precoding performance of the source node is better, but this also increases the feedback cost. By application of the effective capacity optimization method of multi-antenna transmission under feedback limitation disclosed by the invention, the optimal channel feedback quantization bit is sought, and the effectiveness and the reliability of wireless transmission are improved under the condition of limited feedback cost, and the effective capacity of the multi-antenna transmission is significantly improved at the same time.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a method for optimizing the effective capacity of multi-antenna transmission under limited feedback. Background technique [0002] With the rapid development of wireless communication technology and the increasing number of users, the problem of insufficient spectrum resources has become more and more serious, which has become a bottleneck in the development of wireless communication. Limited spectrum resources. Multi-antenna technology can double the channel capacity of the system and greatly improve the flexibility and transmission efficiency of the system without increasing the spectrum resources and antenna transmission power by processing the air and time domains of the transmitted and received signals. It effectively improves the capacity and quality of the system, thus becoming one of the core technologies of the new generation of wireless communication. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456
CPCH04B7/0456
Inventor 邹玉龙吴彤姚颖朱佳余亮
Owner NANJING UNIV OF POSTS & TELECOMM
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