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Analog signal compressed sampling method

A technology for compressing sampling and analog signals, applied in electrical components, code conversion, etc., can solve problems such as incomplete sampling, and achieve the effect of improving performance and solving the problem of incomplete signal sampling.

Inactive Publication Date: 2013-08-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a method for compressed sampling of analog signals, to solve the incomplete sampling effect caused by the reset time of the integrator, and to improve the performance of compressed sampling signal reconstruction

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Embodiment Construction

[0017] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0018] figure 2 It is a principle block diagram of a specific embodiment of the analog signal compression sampling method of the present invention.

[0019] like figure 2 As shown, in this embodiment, the analog signal compression sampling method of the present invention includes the following steps:

[0020] Step ST1: Obtain a sequence of compressed sampling values.

[0021] The measured analog signal x(t) and the pseudo-random sequence P with the Nyquist frequency of the signal c (t) Random demodulation using a mixer. In this embodiment, in order to meet the requir...

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Abstract

The invention provides an analog signal compressed sampling method. The method includes the steps of providing a compression measurement matrix on the basis of a framework, carrying out synchronous transformation on a compression sampling value sequence and the compression measurement matrix, eliminating the influence of correlation of a matrix vector equation on reconstruction performance of detected analog signals, carrying out reconstruction on the detected analog signals according to the equation, and obtaining sampling sequences of the detected analog signals. When an integrator carries out integration on demodulated signals within a sampling time period, the integrator does not carry out restoration processing. Therefore, the analog signal compressed sampling method solves the problem of signal incompletion sampling caused by charging time of the integrator, and improves the performance of an analog information transpression sampling system.

Description

technical field [0001] The invention belongs to the technical field of high-speed periodic signal sampling, and more specifically relates to an analog signal compression sampling method capable of reducing the difficulty of system design. Background technique [0002] Compressive sampling technology is an under-sampling method based on compressed sensing theory. This technology utilizes the sparse characteristic that only a small number of frequency components have significant amplitude after the Fourier transform of the periodic measured analog signal, and the amplitude of most of the frequency components is zero. The signal is randomly demodulated, the demodulated output signal is compressed by an integrator, and finally the compressed signal is sampled by a low-speed ADC, and the original signal, that is, the measured analog signal, can be accurately reconstructed through an optimization algorithm. [0003] The implementation principle of existing compressed sampling tec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30
Inventor 赵贻玖王厚军王锂戴志坚韩熙利
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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