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Method for modeling Nakagami repeated fading channel

A channel modeling and complex fading technology, which is applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problems that the first-order channel characteristics and second-order channel characteristics cannot be obtained at the same time, and the Doppler effect is not considered.

Inactive Publication Date: 2014-09-17
XIDIAN UNIV
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Problems solved by technology

In general, the simulation of Nakagami by existing methods cannot obtain good first-order channel characteristics and second-order channel characteristics at the same time
In addition, the Brute Force method, the inverse transformation method and the discarding method do not consider the Doppler effect caused by the relative movement between the transmitter and the receiver or the movement of environmental objects.

Method used

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  • Method for modeling Nakagami repeated fading channel
  • Method for modeling Nakagami repeated fading channel
  • Method for modeling Nakagami repeated fading channel

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Embodiment Construction

[0063] Please refer to figure 1 , a kind of Nakagami complex fading channel modeling method of the present invention, it comprises the following steps:

[0064] S1 adopts sinusoidal superposition method to generate length N=10 6 The p+1 Rayleigh channel random sequence;

[0065] S1.1 Calculate the Doppler coefficient c i,n , discrete Doppler frequency f i,n and Doppler phase θ i,n :

[0066] c i , n = 2 σ 0 N i - 1 2 sin ( nπ ...

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Abstract

The invention relates to a method for modeling a Nakagami repeated fading channel. The method includes the following steps: S1, growing a p+1-channel Rayleigh channel random sequence which is N in length with a sine superposition method; S2, generating Nakagami enveloping distribution, wherein generation of Nakagami enveloping distribution includes the steps of S2.1 calculating coefficients including pi, alpha, beta and gamma, wherein the pi is an integer part of the m, and S2.2 substituting the p+1-channel Rayleigh channel random sequence into an equation, and generating a Nakagami enveloping random sequence R(t) which is N in length; S3, generating a Nakagami phase random sequence with the even cap abandoning method; S4, generating the repeated fading channel by superposing enveloping random sequence and the phase random sequence.

Description

technical field [0001] The present invention is a wireless channel modeling for Nakagami complex fading, and more specifically, the present invention relates to a modeling and simulation method for Nakagami complex fading wireless channel. Background technique [0002] In wireless communication, signal transmission is mainly affected by three mechanisms of reflection, refraction and diffraction in radio wave propagation. The above-mentioned effects of various objects in the transmission environment between the sending end and the receiving end cause the transmitted signal to reach the receiver through different paths. The received signal is essentially the superposition of different path signals and noise. Since the signals of each path have different amplitudes, phases, and time delays, the combined signals may enhance or cancel each other, that is, different degrees of signal fading. This process will lead to rapid and time-varying deep fading of the received signal, maki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00
Inventor 石磊郭振刘彦明赵蕾李小平姚博
Owner XIDIAN UNIV
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