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

A real-time simulation, dynamic scene technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problems of inconsistent channel state continuous characteristics, channel state parameter mutation, signal phase discontinuity, etc.

Active Publication Date: 2016-11-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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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  • Method and device for real-time simulation of wireless channel in dynamic scene
  • Method and device for real-time simulation of wireless channel in dynamic scene
  • Method and device for real-time simulation of wireless channel in dynamic scene

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Embodiment Construction

[0033] The specific implementation manner of the present invention will be further described in conjunction with the accompanying drawings and examples. The following examples are used to explain the present invention, but do not limit the scope of application of the present invention.

[0034] Step 1: The interval T between different dynamic scenarios provided by the user c =5s, the number of channel scenes C=10. The channel dynamic scene input unit 1-1 records the motion trajectory of the transceiver end in real time and calculates motion parameters, including motion speed, spatial distance, and reflection point position, etc.; in this implementation case, the simulator outputs the channel status update time T r = 0.005s, that is, the number of channel scenes after interpolation R = 1000, where the linear interpolation unit 1-7 channel state update time T s = 0.5s.

[0035] Step 2: Real-time estimation of channel state parameters, including multipath delay τ, through moti...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/00
Inventor 朱秋明刘星麟周生奎戴秀超陈小敏虞湘宾黄攀薛翠薇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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