A Method for Super-resolution Time Delay Estimation of Narrowband Multipath Signals in Impulse Noise Environment

A multipath signal and time delay estimation technology, applied in the field of signal processing, can solve the problem of time delay estimation accuracy decline and other problems, achieve high accuracy and suppress impulse noise.

Active Publication Date: 2021-09-24
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] In order to solve the problem that the accuracy of time delay estimation decreases rapidly with the decrease of characteristic index and generalized signal-to-noise ratio under the narrowband multipath signal model with impulse noise, the present invention provides a narrowband multipath signal model under impulse noise environment. Super-resolution time delay estimation method for multipath signals

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  • A Method for Super-resolution Time Delay Estimation of Narrowband Multipath Signals in Impulse Noise Environment
  • A Method for Super-resolution Time Delay Estimation of Narrowband Multipath Signals in Impulse Noise Environment
  • A Method for Super-resolution Time Delay Estimation of Narrowband Multipath Signals in Impulse Noise Environment

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specific Embodiment approach

[0018] The specific embodiments of the present invention will be further described below with reference to the drawings and technical solutions, and the steps are as follows:

[0019] The first step, the signal model of the super-resolution time delay rate of multipath signal is established

[0020] Idelect Wireless Signal Propagation Model Assume that the signal received by the Q air in the space is the source signal delay, the attenuation signal, and the combination of additive noise. Queen Quali line received signal R q In mathematics can be expressed:

[0021] r q = Λ q S (N-T-F q (τ)) + w q (n), q = 0, 1, 2 ..., q-1 (1)

[0022] Medium, λ q Is the attenuation coefficient of communication, S (n) is a source signal, T is the absolute time delay of the source signal to a reference receiver, f q (τ) = kτ is a relative delay between the linear arrangement reference receiver and other receivers, W q (n) a pulse noise that is not related to the noise of the source signal and other r...

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Abstract

The invention discloses a method for super-resolution time delay estimation of a narrowband multipath signal in an impulse noise environment, and belongs to the technical field of signal processing. It is characterized in that the exponential Gaussian kernel function is used to suppress impulse noise to obtain a higher accuracy rate of time delay estimation; the multipath signal model is converted by using Fourier transform and inverse Fourier transform to obtain a false signal suitable for the MUSIC algorithm model to achieve super-resolution time delay estimation. Experiments prove that the present invention can obtain a higher correct rate of time delay estimation under the condition of strong impulsive noise.

Description

Technical field [0001] The present invention belongs to the field of signal processing, and the method of narrowband multipath signal super resolution in a pulse noise environment, during the radio target monitoring and positioning, when the received signal is a narrowband multipath signal and When there is a pulse noise, the present invention can reduce the effect of pulsed noise, thereby precisely estimating the time delay between the multipath signal. Background technique [0002] Time delay estimate is an important part of radio signal positioning and parameter estimation in modern signal processing. The key to research is to accurately estimate the time delay between the received signal and the reference signal. The resolution problem of the traditional time delay rate is mainly reflected in the time delay of narrowband signals, when estimating the narrowband signal time delay, the related peak envelope is widely fused, and it cannot be combined. Dismissal multipath delay. I...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/364G06F17/14
CPCG06F17/141H04B17/364
Inventor 邱天爽刘浩李景春李蓉唱亮
Owner DALIAN UNIV OF TECH
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