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A power allocation method and system based on instantaneous channel state information

A state information and instantaneous channel technology, applied in power management, transmission system, digital transmission system, etc., can solve problems such as poor system interruption performance and intersymbol interference

Active Publication Date: 2020-12-11
JIANGSU JEZERO COMM TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Applying the idea of ​​network coding in cooperative relay technology can improve the effectiveness and reliability of cooperative diversity systems without the need for additional frequency resources and transmission power. Space-time coded transmission diversity technology has been proposed in many documents , but it is only suitable for flat fading channels, but under frequency selective channel conditions, the symbol period of space-time codes is smaller than the delay spread of multipath fading, which will lead to serious intersymbol interference and poor system interruption performance

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  • A power allocation method and system based on instantaneous channel state information
  • A power allocation method and system based on instantaneous channel state information
  • A power allocation method and system based on instantaneous channel state information

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Embodiment Construction

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0059] The purpose of the present invention is to provide a power allocation method and system based on instantaneous channel state information, and propose a power allocation scheme based on instantaneous channel state information by combining orthogonal frequency division multiplexing technology with space-time coding technology, For better system interrupt performance.

[0060] In order to make the above objects, features and advantages of the present inven...

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Abstract

The invention discloses a power allocation method and system based on instantaneous channel state information. According to the method and the system, a space-time collaboration system model is established, an end-to-end signal-to-noise ratio relationship in the space-time collaboration system model is analyzed, and a power allocation factor of a subcarrier is determined according to the end-to-end signal-to-noise ratio; and the sending power of each subcarrier in the space-time collaboration system model is allocated according to the power allocation factor, so that a better system interruption performance can be obtained.

Description

technical field [0001] The present invention relates to the technical field of cooperative communication, in particular to a power allocation method and system based on instantaneous channel state information. Background technique [0002] Cooperative diversity is an important technology to overcome fading, expand service coverage and improve system capacity in wireless networks. The single-antenna terminal nodes in the cooperative system share their antennas with each other in a certain way to form a virtual Multiple-Input Multiple-Output (MIMO) transmission and reception array, thereby obtaining higher diversity gain. In a cooperative system, typical cooperative methods are Amplify-and-forward (AF) and Decode-and-forward (DF). AF is easier to implement, but it amplifies the noise as well as the useful signal. In the DF cooperation scheme, the relay receives the data from the source node, decodes, re-encodes, and finally transmits, eliminating the noise doped in the recei...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06
CPCH04B7/0426H04B7/0626H04L1/0618H04W52/34
Inventor 季彦呈董丹凤胡晶晶章国安朱晓军曹娟段玮金丽
Owner JIANGSU JEZERO COMM TECH CO LTD