Multiple Input Multiple Output (MIMO) is a new key technology for mobile communications. This technology can multiply the bandwidth capacity and spectrum utilization of the communication system without increasing the burden on the network. MIMO technologies include spatial multiplexing, spatial division multiple access, precoding, and open loop transmit diversity. MIMO technology optimizes the multipath wireless channel as a whole with transmission and reception, and is relatively close to the optimal airspace time-domain joint diversity and interference cancellation processing.
The most basic configuration of MIMO technology is to use the 2×2 antenna configuration for downlink dual-income and dual-receiving and the 1×2 antenna configuration for uplink and dual-send, and the high-end configuration supports downlink MIMO and antenna diversity. 4x4 antenna configuration or 4x2 antenna configuration for 4x. Currently, MIMO technology has been widely used in broadband technologies such as LTE, and it has become increasingly mature. It will also play a huge role in the future of urban rail transit communications.
The most basic configuration of MIMO technology is to use the 2×2 antenna configuration for downlink dual-income and dual-receiving and the 1×2 antenna configuration for uplink and dual-send, and the high-end configuration supports downlink MIMO and antenna diversity. 4x4 antenna configuration or 4x2 antenna configuration for 4x. Currently, MIMO technology has been widely used in broadband technologies such as LTE, and it has become increasingly mature. It will also play a huge role in the future of urban rail transit communications.
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