Method for testing transmission distance of built-in data radio based on GNSS receiver

Abstract

The invention provides a method for testing the transmission distance of a built-in data radio based on a GNSS receiver, which comprises the steps that a tool for detecting the internal signal-to-noise ratio of the data radio is manufactured; the data radio is enabled to be connected to an external display screen, and a program of the data radio transforms the calculated signal-to-noise ratio intovoltage and displays the voltage on the display screen; the frequency of the data radio is set to be consistent with the frequency of a transmitting radio; a test site is selected, radio signals of the transmitting radio are received by using the data radio, and it is indicated that the data radio can normally receive the radio signals sent by the transmitting radio of a base station if a voltagevalue corresponding to the bottom noise is less than the maximum preset voltage value and the difference between a voltage value generated by the data radio when receiving the radio signals and the voltage value corresponding to the bottom noise is greater than the minimum preset voltage value; and the test site is changed until the voltage value corresponding to the bottom noise is greater thanthe preset voltage preset, and the distance between the data radio and the base station in the condition is the farthest transmission distance of the data radio.

Description

technical field [0001] The invention relates to the field of surveying and mapping, in particular to a method for testing the transmission distance of a built-in digital transmission station based on a GNSS receiver. Background technique [0002] There are two differential data transmission methods for GNSS receivers, namely GPRS and digital radio. In some places where the mobile phone network coverage is not very good, only digital radio stations can be used for transmission. However, the transmission distance of the digital transmission station is affected by factors such as the internal electromagnetic compatibility of the receiver, building occlusion, performance of the digital transmission station, and environmental factors. The usual test method is to set up a base station, and then take the mobile station to a place a certain distance from the reference station. Receive and check that the farthest distance that can be received is the longest distance that the digital...

AI Technical Summary

Problems solved by technology

This method cannot reflect the true transmission distance of the digital radio station very well, and cannot rule out the electromagnetic compatibility factor inside the receiver.

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