Wireless multipath fading channel simulation system and method

Abstract

The embodiment of the invention relates to the technical field of simulation test, and discloses a wireless multipath fading channel simulation system and a method. The system comprises a host computer, a frequency conversion unit and a baseband processing unit. The host computer comprises a user control unit and a channel coefficient generation unit. The user control unit is used for setting thechannel model parameters, and the channel coefficient generating unit is used for calculating the impulse response coefficient of the channel fading model according to the channel model parameters. The frequency conversion unit is used for converting a radio frequency test signal into a signal of a preset frequency band and transmitting the signal to a baseband processing unit. The baseband processing unit is used for performing multipath delay processing on the signal of the preset frequency band, and calculating the faded baseband signal according to the impulse response coefficient and thesignal of the preset frequency band processed by the multipath delay processing. By adopting the embodiment of the invention, the wireless communication performance of the equipment can be comprehensively tested, the test is convenient and the cost is low.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of simulation testing, in particular to a wireless multipath fading channel simulation system and method. Background technique [0002] High maneuvering objects such as trains or cloud rails exchange information and data with ground platforms through the wireless electromagnetic environment during their travel. The wireless electromagnetic environment factors of signals in the vehicle-ground communication link are complex and diverse, which poses great challenges to the testing of vehicle-ground communication link equipment. For example, due to the rapid movement of high maneuvering targets such as trains or cloud tracks, the Doppler frequency shift phenomenon of communication signals will be caused, resulting in inconsistencies in the frequency points of the signals at the transmitter and receiver; the rapid switching of trains at the edge of the cell, from a When the situation ch...

AI Technical Summary

Problems solved by technology

The wireless electromagnetic environment factors of signals in the vehicle-to-ground communication link are complex and diverse, which poses great challenges to the testing of vehicle-to-ground communication link equipment

For example, due to the rapid movement of high maneuvering targets such as trains or cloud tracks, the Doppler frequency shift phenomenon of communication signals will be caused, resulting in inconsistencies in the frequency points of the signals at the transmitter and receiver; the rapid switching of trains at the edge of the cell, from a When the situation changes to another working condition, the characteristics of the communication channel will also change, resulting in a delay in communication signal switching, which may cause packet loss in communication signal transmission; the real-time performance of signal transmission in the vehicle-to-ground communication link is also a factor that needs to be considered. It involves the signal transmission delay phenomenon in the vehicle-ground communication link; in the process of vehicle-ground communication interaction, interference from the outside, such as noise, will also have a serious impact on the transmission quality of the vehicle-ground communication link signal

[0003] The inventor found that there are at least the following problems in the prior art: currently, the vehicle-to-ground communication link equipment is generally tested through field tests, which is costly, difficult, and long-term, and the wireless communication performance of the equipment cannot be fully tested.

Images