Power allocation method and system based on instantaneous channel state information
An allocation method and technology of state information, applied in diversity/multi-antenna system, power management, transmission system, etc., can solve the problems of inter-symbol interference, poor system interruption performance, etc.
Active Publication Date: 2018-11-06
江苏杰泽罗通信科技有限公司
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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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[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 of the embodiments of the present invention, not all of them. 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...
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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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Login to View More IPC IPC(8): H04B7/0426H04B7/06H04L1/06H04W52/34
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 江苏杰泽罗通信科技有限公司