Systematic simulation method and apparatus for wireless communication system

A technology of wireless communication and system simulation, applied in the field of system simulation, can solve problems such as low efficiency, achieve the effects of saving development costs, improving simulation time efficiency, and shortening the development cycle

Inactive Publication Date: 2008-12-31
李利军
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method and device for system simulation in a wireless communication system, which solves the problem that the efficiency of existing methods for simulating Rayleigh fading paths through computer calculations is very low due to computer hardware bottlenecks. By applying the present invention, It can improve computing efficiency, reduce development time, and save development costs

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  • Systematic simulation method and apparatus for wireless communication system
  • Systematic simulation method and apparatus for wireless communication system
  • Systematic simulation method and apparatus for wireless communication system

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] In the simulation research of the wireless communication system, it is found that the relative time of the Rayleigh signal envelope is,

[0032] t=9 / (16*π*fm)

[0033] Among them, fm is the maximum Doppler frequency deviation. The movement of the received signal frequency caused by motion is called Doppler frequency deviation. It is proportional to the relative movement speed between the signal source and the signal receiving end. Since the base station in the WCDMA system is fixed, so The relative speed here is the movement speed of MS.

[0034] The Doppler shift Δf is given by:

[0035] Δf = υ λ cos θ

[0036] where θ is the angle of arrival of the received signal;

[0037] υ is the movement speed of MS;

[0038] λ is the carrier wavelength.

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Abstract

Provided is a method system simulation in a wireless system and a device, comprising: obtaining related parameters of a mobile device in a district, under special condition, obtaining a rayleigh fading length, obtaining all fast fading data in the district in the rayleigh fading length, wherein T-limit is the correlation time threshold, with the value larger than the rayleigh fading correlation time value corresponding to the smallest user speed required to be simulated by the system. In the system simulation system, for each fast fading path of each activation link of each mobile device in the district, corresponding fast fading data are read spacingly in smallest time of rayleigh fading, finally, the whole system simulation is completed, wherein the read time interval is larger than T-limit. According to the invention, under the condition that the hardware of the computer is limited, wireless communicating system simulation of rayleigh fading is computed according to the smallest time grain, thereby greatly advancing simulation time efficiency, shortening development cycle, saving development cost.

Description

technical field [0001] The invention relates to a wireless communication system, in particular to a system simulation method and device under the condition of limited computer hardware resources. Background technique [0002] System simulation, through the computer to model the system, can optimize the system parameters, shorten the development cycle, and save a lot of development funds, so it is widely used in the field of product development. Take the Wideband Code Division Multiple Access (WCDMA) system as an example to illustrate . [0003] Generally, the propagation environment of the wireless communication system is very bad, and it basically belongs to the ground plane propagation, because the mobile device (MS) antenna is very low, and the signal wavelength is much smaller than that of the building. experience severe fast fading. [0004] like figure 1 As shown, the fast fading is superimposed on the slow fading signal. The fading speed changes rapidly. In additio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/34H04B17/00H04W24/06
Inventor 王东韩玮郝瑞晶阮玉峰况振东
Owner 李利军
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