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A signal period estimation method in the case of single-channel multi-period signal aliasing

A signal period, multi-period technology, applied in computing, informatics, computer parts and other directions, can solve the problems of insufficient information, difficult single-channel signal separation, etc., to achieve the effect of simple operation, easy implementation, and improved blind separation efficiency

Active Publication Date: 2019-06-14
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Since the number of channels is smaller than the number of signals, the amount of information available is insufficient, and single-channel signal separation becomes particularly difficult

Method used

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  • A signal period estimation method in the case of single-channel multi-period signal aliasing
  • A signal period estimation method in the case of single-channel multi-period signal aliasing
  • A signal period estimation method in the case of single-channel multi-period signal aliasing

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Embodiment Construction

[0021] 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 creative efforts fall within the protection scope of the present invention.

[0022] See figure 1 , the period estimation method of the present invention comprises the following steps:

[0023] S1: Acquire the aliased signal for a long enough time and store it as a digital signal. If the aliased signal is already a digital signal, skip this step;

[0024] S2: Modeling aliased signals. The present invention assumes that the single-channel aliasing signal x is composed of n periodic signals s 1 ,s 2 ...,s n Formed by linear superposition,...

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Abstract

The invention discloses a method for estimating the period of a signal in the case of single-channel multi-period signal aliasing. Modeling; traversing all possible periodic combinations of all signals, and reconstructing multi-period aliasing signals under each periodic combination condition; finding the periodic combination of a group of signals with the smallest objective function value in all periodic combinations, the group The combination of signal periods is the period of each signal. The beneficial effect of the present invention is that, compared with the prior art, it has the characteristics of easy implementation and simple operation, and the period of the aliased periodic signal is estimated in advance by using the method of the present invention, which provides period information for the blind signal separation in the next stage, and effectively It is beneficial to improve the efficiency of blind separation.

Description

technical field [0001] The invention relates to the field of electronic information counting, in particular to a method for estimating a signal period in the case of single-channel multi-period signal aliasing. Background technique [0002] Blind Source Separation (BSS) is a very challenging research topic in the field of signal processing. Since blind separation has broad and attractive application prospects in many application fields such as speech recognition, signal denoising, wireless communication, sonar problems, biomedical signal processing, and optical fiber communication, blind separation has become an important part of the signal processing field from the very beginning. Research hotspots in the field of neural networks. [0003] Single-channel blind separation is an extreme case of blind separation, which separates multiple time-frequency aliased signals based on a single-channel mixed signal. In reality, it is a very common phenomenon that a signal received by...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/62
CPCG16Z99/00G06F18/2134
Inventor 何昭水王沛涛谢胜利黄鸿胜
Owner GUANGDONG UNIV OF TECH