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Compression sampling and reconstruction method of high-speed nuclear signal

A technology for compressing sampling and nuclear signals, which is applied in the field of signal processing and can solve problems such as power consumption, measurement time measurement accuracy limitations, etc.

Active Publication Date: 2019-11-08
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology

[0008] The purpose of the present invention is to provide a high-speed nuclear signal compression sampling and reconstruction method, which mainly solves the limitation of the Shannon digital sampling method existing in the prior art on the measurement accuracy of the nuclear signal measurement time and the power consumption, cost and high sampling rate. big data problem

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  • Compression sampling and reconstruction method of high-speed nuclear signal
  • Compression sampling and reconstruction method of high-speed nuclear signal
  • Compression sampling and reconstruction method of high-speed nuclear signal

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Embodiment

[0039] Such as Figure 1 to Figure 7 As shown, a compression sampling and reconstruction method of a high-speed nuclear signal comprises the following steps:

[0040] Introduce compressed sensing theory into high-speed nuclear signal acquisition, establish an over-complete atomic library suitable for asymmetric nuclear signals, and optimize the sparse representation of nuclear signals; adopt a compressed sampling scheme suitable for high-speed nuclear signals; solve the problem of high sampling rate for nuclear signals The constraint of improving the measurement accuracy reduces the amount of redundant data under the premise of ensuring the complete nuclear signal information. The specific steps are:

[0041] The first step is to establish the best over-complete atomic library to adapt to asymmetric nuclear signals; for the problem of high time complexity of the typical sparse decomposition algorithm-matching pursuit algorithm, the genetic algorithm is combined with the match...

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Abstract

The invention discloses a compression sampling and reconstruction method of a high-speed nuclear signal, which mainly solves the problems of limitation of a Shannon digital sampling method on measurement accuracy of nuclear signal measurement time and power consumption, cost and large data volume caused by high sampling rate in the prior art. The method comprises the following steps: (S1) performing sparse decomposition on a high-speed nuclear signal by adopting a genetic algorithm and a matching pursuit algorithm; (S2) based on a compressed sensing framework, performing compressed sampling onthe high-speed nuclear signal through a multi-channel random demodulator; and (S3) reconstructing a high-speed nuclear signal through a least square algorithm. According to the scheme, the purpose ofreconstructing the high-speed nuclear signal is achieved. The method has very high practical value and promotional value.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a compression sampling and reconstruction method of a high-speed nuclear signal. Background technique [0002] In 2004, David L Donoho, E. Candès, Terence Tao and others proposed the theory of compressed sensing (Compressive Sensing, CS). The theory points out that: for sparse signals (signals that can be represented by a linear combination of a few eigenvectors), the original signal can still be accurately restored by sampling the data in a way that is far below the Shannon sampling standard. Once the theory was put forward, it has received high attention in the fields of wireless communication, radar and medical imaging, and it also provides a new method for nuclear data processing and acquisition. [0003] Nuclear signals are discretely distributed on the time axis and have natural sparsity in the time domain, which meets the prerequisites for the applic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30G06K9/00G06K9/46
CPCH03M7/3062G06V10/40G06V10/513G06F2218/22G06F2218/08
Inventor 王琦标庹先国邓超刘福乐石睿郑洪龙张松柏
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING