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A signal power measuring method suitable for a scattering channel

A technology of scattering channel and signal power, which is applied in the field of signal power measurement of scattering channel, can solve the problems of long signal acquisition time and reduced influence of time selective fading, etc., and achieve the goal of reducing signal acquisition time, reducing influence and broad market prospect Effect

Active Publication Date: 2019-05-31
北京慧清科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a signal power measurement method suitable for scattering channels, to solve the signal power measurement of scattering channels proposed in the above background technology because the signal acquisition time is too long due to the implementation of fixed frequency, and it is impossible to reduce the time selection. The problem of reducing the influence of frequency selective fading while reducing the influence of frequency selective fading

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for measuring signal power applicable to scattered channels, comprising the following steps:

[0022] 1) Determine the coherent bandwidth: determine the fading period and coherent bandwidth of the scattering channel according to the experimental and data analysis results (coherent bandwidth is an index describing the delay extension and an important parameter to characterize the characteristics of a multipath channel. It refers to a specific Any two frequency components in the frequency range have a strong correlation, that is, within the coherent bandwidth range, the multipath channel has constant gain and linear phase);

[0023] 2) Frequency hopping design: Carry out frequency hopping design according to the determined coherent bandwidth of the scattering channel. The frequency interval of frequency hopping is greater than the coherent bandwidth of the channel, so that the signals within each frequency hopping time can be independent of each other. If a certa...

Embodiment 2

[0028] In this embodiment, a signal power measurement method suitable for a diffuse channel, taking the Ku band under a diffuse channel as an example, describes the signal power measurement method under a fading channel in detail:

[0029] 1) Determine the fading period and related bandwidth of the scattered channel

[0030] According to the results of experiments and data analysis, it is obtained that the fading period of the Ku-band of the scattering channel is about 50-1000 milliseconds and the channel correlation bandwidth is about 3 MHz in some application environments;

[0031] 2) Determine the frequency hopping scheme

[0032] Select the communication frequency band as the 14.5G-14.9G range of the Ku band, the frequency interval is 40MHz, and the frequency hopping frequency points are 8, respectively f 0 , f 1 , f 2 , f 3 , f 4 , f 5 , f 6 , f 7 , where f 0 14.58GHz, f 1 14.62GHz, f 2 14.66GHz, f 3 14.70GHz, f 4 14.74GHz, f 5 14.78GHz, f 6 14.82GHz, f 7 ...

Embodiment 3

[0042]A method for measuring signal power applicable to scattered channels, comprising the following steps:

[0043] 1) Determine the coherent bandwidth: determine the fading period and coherent bandwidth of the scattering channel according to the experimental and data analysis results (coherent bandwidth is an index describing the delay extension and an important parameter to characterize the characteristics of a multipath channel. It refers to a specific Any two frequency components in the frequency range have a strong correlation, that is, within the coherent bandwidth range, the multipath channel has constant gain and linear phase);

[0044] 2) Frequency hopping design: frequency hopping design is carried out according to the determined coherent bandwidth of the scattering channel, and the frequency interval of frequency hopping is greater than the coherent bandwidth of the scattering channel; in order to perform time synchronization, the scattering communication system gen...

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PUM

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Abstract

The invention discloses a signal power measurement method suitable for a scattering channel, which relates to the field of wireless communication and comprises the following steps of: 1) determining acoherent bandwidth; 2) frequency hopping design; and 3) determining and calculating the time length of the signal average power. The invention aims to solve the problems that the signal acquisition time is long during scattering channel signal power measurement; the problem that the frequency selective fading influence cannot be reduced while the time selective fading influence is reduced is solved; according to the invention, the frequency diversity and time diversity thought is combined; through short-time statistics of frequency hopping signals, the influence of frequency selective fadingand time selective fading is greatly reduced, accurate measurement of signal power can be rapidly realized, and the method can be applied to signal power measurement under various fading channels, andplays a key role in application of antenna alignment, fading channel analysis and the like.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for measuring signal power applicable to scattered channels. Background technique [0002] At present, with the continuous development of science and technology, there are more and more application occasions for wireless communication systems, and the channel environment is becoming more and more complex. Usually, the signal arriving at the receiving end is superimposed after passing through multiple paths, and the amplitude of each path component , phase, etc. will lead to fast fading of the signal at the receiving end (forming a fading channel), that is, the amplitude of the signal at the receiving end exhibits rapid fluctuations, and this rapid change in amplitude will lead to inaccurate signal power measurement in a fading channel sex. [0003] Fast fading shows different characteristics at different times, different frequencies and different spaces, so it is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/30H04B17/391H04B7/22
Inventor 杨晓青石全旺刘鹏
Owner 北京慧清科技有限公司
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