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Method and Device for Extracting Impulse Response of Time Domain Signals

A time-domain signal and impulse response technology, applied in the field of communication, can solve the problems of impulse response error and system parameter estimation error, and achieve the effect of improving accuracy and performance

Inactive Publication Date: 2017-09-22
NANJING ZHONGXING XIN SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] The main purpose of the present invention is to provide a time-domain signal impulse response extraction scheme to at least solve the problem in the above-mentioned related art that the error in the channel impulse response extraction using the CLEAN algorithm is serious, resulting in incorrect estimation of system parameters

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  • Method and Device for Extracting Impulse Response of Time Domain Signals
  • Method and Device for Extracting Impulse Response of Time Domain Signals
  • Method and Device for Extracting Impulse Response of Time Domain Signals

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Embodiment 1

[0061] This embodiment provides a method for extracting the impulse response of a time-domain signal, that is, the channel impulse response is regarded as the product of a constant and a unit impulse response Find out the multipath gain and delay information by directly taking the peak value, and then extract the channel impulse response, which can avoid the interference of waveform distortion. This method is not only effective in the wideband range but also can deal with some waveform distortion signals to make up for the shortcomings of the CLEAN algorithm.

[0062] During implementation, the method may include the following steps:

[0063] Step 1, obtain a single template signal by measurement, and record its peak value a m and pulse width T m . Image 6 A schematic diagram of a template signal according to Embodiment 1 of the present invention, such as Image 6 As shown, record the peak a of the single-template signal m and pulse width T m .

[0064] Step 2, find t...

Embodiment 2

[0070] In the implementation process, the pulse peak value a of the received signal in the above step 2 can be obtained in the following two ways k and its occurrence time t k .

[0071] Method 1, use the Mspeaks function of the MATLAB tool to perform two iterations to find the multipath peak. For example, use the Mspeaks function to capture Figure 8 The extreme value of the medium waveform, that is, the envelope of the waveform can be obtained by using the Mspeaks function once for the multi-carrier Gaussian pulse signal, and the peak values ​​of the multipath signal can be obtained by using it again.

[0072] Method 2, first intercept Image 6 The time domain width T of the template signal in m ; Second, first find out Figure 8 The peak value of the first pulse in , record the time delay t corresponding to the peak value 1 and amplitude a 1 , then, according to the width T of the template signal m , taking the time delay as t 1 center, set the width to T m Set th...

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Abstract

The invention discloses an extraction method and device for a time domain signal impulse response. The method comprises the following steps of: receiving a time domain signal of a single template signal via a channel to obtain a peak value ak of each pulse of the time domain signal and a moment tk corresponding to ak, wherein k is a positive integer; and according to ak, tk and the peak value am of the single template signal, obtaining the channel impulse response. According to the extraction method and device for the time domain signal impulse response, the precision and the performance of the system are improved.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for extracting impulse responses of time-domain signals. Background technique [0002] Wireless communication is developing in the direction of broadband and multi-point integration. At present, the hardware conditions for transmitting / receiving broadband (or ultra-wideband) have matured, and the research on wireless channels has become a bottleneck restricting the development of wireless communication. [0003] The channel refers to the physical channel for transmitting information. Different channels have different influences on the transmission of signals, and each parameter of the channel determines the degree of influence of the channel on the signal. Through channel modeling, it is possible to understand the influence of the channel on the transmission signal, explore system capacity, and optimize system performance. Channel modeling refers to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L25/03
Inventor 袁家劼李永杨雪松
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD
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