Method and device for real-time simulation of wireless channel in dynamic scene

Abstract

The invention discloses a wireless channel real-time simulation method and device in a dynamic scene. First, the user inputs channel dynamic scene parameters such as the movement trajectory of the transceiver end, the communication scene, and the update rate of the output channel state; accordingly, the channel parameter estimation unit 1-2 performs parameter estimation on each channel state, including the maximum Doppler frequency shift, multiple path delay and propagation loss, etc.; then, the channel parameter interpolation unit 1-3 determines and randomly interpolates the estimated channel state parameters according to user settings; finally, the channel real-time simulation unit 1-4 performs interpolation according to the interpolation The final channel parameters are simulated in real time to generate a time-varying channel, and the channel impulse response is generated through the delayed tap line model and superimposed on the input signal sampled by the A / D unit 1‑5, and the final output signal is transformed by the D / A unit 1‑6 output.

Description

technical field [0001] 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 [0002] 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. [0003] 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...

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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