Short-wave aviation mobile channel modeling method based on Wutson model

Abstract

The invention belongs to the technical field of short-wave data communication, and particularly relates to a short-wave aviation mobile channel modeling method based on a Wutson model, which comprises the following steps: acquiring the running state of an aircraft, wherein the running state of the aircraft comprises the maximum moving speed, the acceleration, the maneuvering frequency and the motion trail of the aircraft; constructing a short-wave aviation mobile channel model according to the operation state of the aircraft and the improved Wutson model; and in the improved Woltson model, modeling Doppler frequency shift of a channel again, and constructing the Doppler frequency shift into time-varying Doppler frequency shift related to the motion state. According to the method, the influence of factors such as the maximum moving speed, the acceleration, the maneuvering frequency and the motion trail of the aircraft on the short-wave aviation mobile channel is studied, the complexity of a mobile scene is combined with channel fading, and all characteristics of short-wave mobile communication are reflected; and the method has an important reference value for further research of a short-wave aviation mobile communication system.

Description

technical field [0001] The invention belongs to the technical field of short-wave data communication, and in particular relates to a modeling method of short-wave aviation mobile channel based on Watson model. Background technique [0002] Short-wave communication (3-30MHz) uses the mechanism of ionosphere reflection of high-frequency electromagnetic waves to realize over-the-horizon communication of thousands of kilometers, and can achieve global coverage after multiple reflections. basic means. In the case of failure of the satellite communication system, short-wave communication is the main means, and sometimes even the only means, for remote command and control of aircraft beyond visual range. In the aeronautical mobile communication system, when the aircraft is moving linearly or circularly with variable speed, the relative motion of the transceiver will cause time-varying Doppler frequency shift and expansion of the received signal. Combined with the signal distortio...

AI Technical Summary

Problems solved by technology

[0004] However, due to the imperfect functionality of the existing Watterson model, when establishing a shortwave channel model, the model has a simple structure, does not combine the complexity of the mobile scene with channel fading, and cannot reflect all the characteristics of the shortwave mobile channel

Therefore, there is a lack of a standard channel model for HF aeronautical mobile channels

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