Signal path signal transmission system, method and device for wireless channel experiment

Abstract

The invention belongs to the technical field of wireless communication experiment teaching, and discloses a signal path signal transmission system, method and device for a wireless channel experiment.An input port is connected to a transmitting antenna end of a wireless communication system through a radio frequency cable; anoutput port is connected to areceiving antenna end of the wireless communication system to form a complete wireless transceiving communication system; and attenuation of signals on each path is adjusted by adjusting avariable resistor on each microstrip line. According tothe invention, a plurality of microstrip lines and a plurality of variable resistors are used to simulate the multipath phenomenon in a wireless channel, the mode of wireless communication experimentteaching is changed, and students are helped to master the multipath phenomenon in the wireless channel and the influence of the multipath phenomenon on the performance of a wireless communication system. According to the invention, a hardware circuit is used to simulate a wireless channel, which is closer to an actual wireless communication system. The multipath module can be directly connectedwith a receiver and a transmitter in a communication system, thereby facilitating the development of a wireless communication teaching experiment.

Description

technical field [0001] The invention belongs to the technical field of wireless communication experiment teaching, and in particular relates to a signal path signal transmission system, method and device for wireless channel experiments. Background technique [0002] At present, the closest existing technology: wireless communication uses the characteristics of electromagnetic waves propagating in free space to realize information exchange, and the wireless channel environment composed of free space is very complicated, resulting in multiple signals when the wireless signal reaches the receiving end from the sending end path. Multiple signal paths cause the transmitted signal to suffer from inter-symbol interference, which seriously affects system performance and increases the bit error rate of the communication system. In terms of wireless communication theory, a large number of models have been established for wireless channels, including closed models, parametric models,...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: wireless channel modeling is highly complex and difficult to implement; it cannot be effectively connected with the channel model implemented by software, and other wireless communication modules can only use software simulation methods at this time. Big difference from the actual situation

Images