Vehicle-mounted bidirectional transceiver based on millimeter wave active phased array

Abstract

The invention provides a vehicle-mounted bidirectional transceiver based on a millimeter wave active phased array. The vehicle-mounted bidirectional transceiver comprises a first active transmit-receive array, a second active transmit-receive array, a GNSS receiving antenna, a frequency source module, a power supply module and a digital intermediate frequency board card, wherein the first active transmit-receive array and the second active transmit-receive array respectively comprise a millimeter wave phased array antenna array. The millimeter wave phased array antenna array is adopted to replace a traditional fixed beam antenna, reconstruction of beam pointing and beam performance can be achieved through flexible beam switching, beam tracking of a vehicle-mounted terminal and a ground base station of rail transit in a straight lane and a bent lane is achieved, and the reliability and the safety of a communication link are improved.

Description

technical field [0001] The invention relates to the technical field of millimeter waves, in particular to a vehicle-mounted two-way transceiver based on a millimeter wave active phased array. Background technique [0002] Extremely High Frequency ("EHF") is the International Telecommunication Union ("ITU") designation for a radio frequency band in the electromagnetic spectrum from about 28 to 300 gigahertz ("GHz"). Radio waves in this frequency band have wavelengths from 10 millimeters to 1 millimeter and are thus called millimeter waves (“mmWave” or “mmWaves”). [0003] In recent years, rail transportation represented by subways, high-speed railways, and maglev trains has developed rapidly around the world, greatly improving people's travel efficiency and improving the level of social and economic development. In the rail transit system, wireless communication is generally used between the train and the ground to realize the two-way data interconnection between the vehicle...

AI Technical Summary

Problems solved by technology

[0004] However, as the speed of trains continues to increase, from the current mature technology of 350km / h high-speed rail wheel-rail traffic to the 600km / h magnetic levitation system, and even the vacuum pipeline traffic of the order of 1,000 km / h, the continuous increase in speed has caused The time delay, reliability, bit error rate and other indicators of wireless communication links for transmission of traction and control information are becoming more and more stringent

Traditional communication systems such as GSM-R and LTE-M can no longer meet the signal transmission requirements of rail transit such as maglev and vacuum pipelines. There is an urgent need to achieve lower delay and higher reliability based on high-performance wireless transceiver equipment and customized networks. and security

Images