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Decoding method and system for analog network codes based on independent component analysis

A technology for simulating network coding and independent component analysis, applied in the field of decoding methods and systems for simulating network coding

Active Publication Date: 2014-07-30
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: how to effectively use the interference between node signals to send signals without consuming more wireless bandwidth resources

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  • Decoding method and system for analog network codes based on independent component analysis
  • Decoding method and system for analog network codes based on independent component analysis
  • Decoding method and system for analog network codes based on independent component analysis

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Embodiment Construction

[0043] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] figure 1 The flow chart of the decoding method for analog network coding based on independent component analysis provided by the embodiment of the present invention, as shown in figure 1 As shown, the decoding method of the analog network coding based on independent component analysis includes:

[0045] The destination node receives the observation signal Y, where Y=KX+N, X is the source signal, K is the channel state factor matrix, and N is the receiver noise;

[0046] Constructing a target matrix G according to the observed signal Y;

[0047] Initialize the separation matrix V to get the initial value V of the separation matrix 0 ;

[0048] Constructing a cos...

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Abstract

The invention discloses a decoding method for analog network codes based on independent component analysis. The decoding method comprises the following steps of: S1: receiving an observing signal Y by a target node, wherein Y is equal to KX+N, in which X refers to a source signal, K refers to a channel state factor matrix, and N refers to noise; S2: constructing a target matrix G according to the observing signal Y; S3: initializing a separation matrix V to obtain an initial value v0 of the separation matrix; S4: constructing a cost function C (G, V) according to the target matrix G and the separation matrix V; S5: substituting the initial value v0 of the separation matrix into the cost function C (G, V), and carrying out iterative optimization on the cost function C (G, V) according to a joint diagonalization principle, so as to obtain the separation matrix V; and S6: estimating the source signal hat(X)=V*Y and channel state factors hat(K)=V+ of the separation matrix V. The invention further discloses a decoding system for the analog network codes based on the independent component analysis. With the adoption of the decoding method and system for the analog network codes based on the independent component analysis provided by the invention, the influence of signals, generated in wireless medium, can be effectively used so as to improve network capability; and therefore, the problem in prior art that an interference elimination technology needs to consume system resources can be solved.

Description

technical field [0001] The invention relates to the technical field of analog transmission and network coding, in particular to a decoding method and system for analog network coding based on independent component analysis. Background technique [0002] Due to the broadcast transmission characteristics of the wireless network, severe interference will occur between the transmission and reception of the nodes exposed in the free space. Therefore, the wireless medium essentially needs to fight against a problem: transmission interference between nodes. Currently existing interference elimination technologies are mostly implemented by consuming system resources, such as increasing transmit power, or occupying more channel bandwidth, and orthogonalizing signals of different nodes (TDMA, FDMA). However, the solution to eliminate interference at the cost of node resources runs counter to the high-speed and large-capacity requirements of future communication systems, and is not an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 陆建华杜冰
Owner TSINGHUA UNIV