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Realization method of Doppler effect based on 5G wireless channel emulator

A technology of Doppler effect and wireless channel, applied in the field of Doppler effect realization of wireless channel emulator, can solve the problems of reducing the input signal-to-noise ratio, affecting the performance of bit error rate, etc., to achieve harmonic suppression, suppression effect, good harmonic effect

Active Publication Date: 2021-02-19
CHENGDU KSW TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase of the Doppler frequency shift Δf will lead to a decrease in the input signal-to-noise ratio of the receiver, thereby affecting its bit error rate performance

Method used

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  • Realization method of Doppler effect based on 5G wireless channel emulator
  • Realization method of Doppler effect based on 5G wireless channel emulator
  • Realization method of Doppler effect based on 5G wireless channel emulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] Such as figure 1 As shown, the Doppler effect of the 5G channel is simulated in the hardware emulator, and the implementation steps are as follows:

[0038] 1. Set a relatively reasonable channel half-wavelength sampling density S D , the relative motion distance of the mobile terminal is divided into several sampling segments. In order to satisfy the sampling law, the half-wavelength sampling density cannot be less than 2. However, if the half-wavelength sampling density is too large, the calculation complexity will be too high. Generally, the half-wavelength sampling density is set to 2. ~8. Assuming that the movement is a distance of L meters in length, the total number of sampled segments is

[0039]

[0040] where f c is the carrier frequency, and c is the speed of light. Each sampling point will calculate the channel impulse response matrix h on each position segment according to the location, so as to obtain the channel matrix sequence h1 on the motion tra...

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Abstract

The invention discloses a method for realizing the Doppler effect of a 5G-based wireless channel emulator, setting a relatively reasonable channel half-wavelength sampling density S D , divide the relative motion distance of the mobile terminal into several sampling segments; where f c is the carrier frequency, and c is the speed of light. According to the channel matrix formula of the 5G fading model, the channel impulse response matrix h on each position segment is calculated to obtain the channel matrix sequence h1 on the trajectory. In the present invention, the Doppler effect of the 5G channel model is realized in a hardware emulator, and on the basis of controllable complexity and calculation amount, the Doppler frequency shift and Doppler expansion of the system-level simulation of complex scenes are accurately simulated, And it has a very good harmonic suppression effect.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for realizing the Doppler effect of a 5G-based wireless channel emulator. Background technique [0002] The modeling methods for various wireless channel models are mainly based on two categories: statistical models and geometric models. The statistical model method refers to the channel propagation characteristics, select typical situations to carry out probability statistics measurement on the signal transmission process, and use the corresponding formula fitted by the statistics obtained by the statistical parameters as the channel propagation model, such as the common Rayleigh channel model, Rice Channel model, etc.; and the geometric model is a channel model obtained by studying the transmission characteristics of signals in wireless channels and using geometric ray tracing modeling. The common wireless MIMO channels defined in the 4G communicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/00H04B17/391H04W24/06
CPCH04B17/0087H04W24/06H04B17/3912
Inventor 沈亮房保卫张吉林李文军李小红
Owner CHENGDU KSW TECH
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