Method and device for simulating shadow fading

Abstract

The invention discloses a method for simulating shadow fading. The method comprises the following steps of: generating an independent Gauss random number matrix; generating a wave filter according to a relevant function of a shadow fading space needed by simulation; applying the independent Gauss random number matrix to the wave filter to obtain a Gauss random number matrix that meets the relativity of the shadow fading space; corresponding the matrix to a grid chart; calculating shadow fading si and s0 on a simulation position in a corresponding grid chart and a public grid chart of a simulation base station respectively; and superposing the si and the s0 by using the angle relativity of the shadow fading needed by the simulation to obtain a final shadow fading simulation result. The invention also discloses a device for simulating the shadow fading. Due to the adoption of the method and the device for simulating the shadow fading, the space relativity and the angle relativity of theshadow fading can be met while simulating the shadow fading.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a shadow fading simulation method and device. Background technique [0002] Shadow fading, also known as lognormal fading, is an integral part of wireless channels. The main reason for the formation of shadow fading is that there are obstacles such as buildings, trees or mountains at the transmitter and receiver of the communication transceiver, so that the signal cannot be transmitted and received in the way of line-of-sight in the link. Therefore, even if the distance between the transmitting and receiving ends is the same and the path loss between them is the same, if the receiving end is located in a different environment, the received signal power will be different. Since the positions of obstacles are randomly distributed, the size of shadow fading is also randomly distributed. [0003] In general, shadow fading is spatially dependent. That is: the shadow fading of a ce...

AI Technical Summary

Problems solved by technology

At present, there are generally two methods for the simulation of shadow fading: one is to simulate through a grid map. With this method, since there is only one grid map, it can only be used for the spatial correlation and angle correlation of shadow fading. One of the characteristics is simulated, and the spatial correlation and angular correlation cannot be satisfied at the same time, so the simulation results are inaccurate; another more common method is to use an approximate method to simulate shadow fading. The simulation results of this method are for Both spatial and angular dependencies are difficult to satisfy

In short, according to the existing simulation methods, the spatial correlation and angular correlation of shadow fading cannot be satisfied at the same time

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