Wireless channel real-time simulation method and device in dynamic scene

Abstract

The invention discloses a wireless channel real-time simulation method and device in a dynamic scene. At first, a user inputs channel dynamic scene parameters of motion tracks of a receiving and sending end, communication scenes and the output channel state update rate; according to the parameters, a channel parameter estimation unit (1-2) carries out parameter estimation on all channel states, and the channel states comprise maximum Doppler frequency shift, multi-path delay and propagation loss; a channel parameter interpolation unit (1-3) carries out determined and randomly mixed interpolation on the estimated parameters of the channel states according to setting of the user; finally, a channel real-time simulation unit (1-4) simulates and generates time-varying channels in real time according to the interpolated channel parameters, a delay tap wire model generates the channel impact response and superposes the channel impact response to input signals sampled through an A / D unit (1-5), and finally output signals are output after being converted through a D / A unit (1-6).

Description

technical field The invention relates to a wireless channel simulation method and device in a dynamic scene, belongs to the field of wireless information transmission, and is particularly aimed at a time-varying wireless channel simulation method in a dynamic mobile environment. Background technique Wireless fading channel modeling and simulation refers to the establishment of a mathematical model based on the analysis of channel characteristics, and the simulation similar to the actual channel in the laboratory environment. Compared with the traditional on-site measurement, this method can greatly reduce the difficulty and cost of communication system testing and has been widely used. When the wireless signal encounters undulating terrain during propagation, it will cause energy absorption and penetration, as well as reflection, scattering and diffraction of radio waves, etc. The signal reaching the antenna of the mobile station does not come from a single path, but from m...

AI Technical Summary

Problems solved by technology

At present, most mobile channel simulation methods are only aimed at channel simulation or simulation in static scenarios. If such methods are directly applied to dynamic scenarios, it will lead to problems such as channel state parameter mutation and signal phase discontinuity, which is different from the actual channel state. Continuity feature does not match

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