Receiving method and system based on combination of space diversity and site diversity

Abstract

An embodiment of the invention discloses a receiving method and system based on combination of space diversity and site diversity. The receiving method comprises steps as follows: millimeter-wave signals of a front base station and a rear base station of a train are received through multiple receiving channels in two groups of directive antennae respectively; the received millimeter-wave signals are subjected to down-conversion to demodulation intermediate frequency for demodulation; the demodulated signals are subjected to same-frequency receiving diversity, and two ways of signals are formed; the two ways of signals formed by the two groups of directive antennae are subjected to diversity reception on the basis of two vehicle-mounted control units on the train; the received signals are output on the basis of external interfaces of the two vehicle-mounted control units. With the implementation of the receiving method and system based on the combination of space diversity and site diversity in the embodiment, power of the received signals is utilized to the greatest extent, reception of core data in the signals is completed, the communication performance is improved, and the influence of radio wave transmission characteristic change factors is reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a receiving method and system based on the combination of space diversity and position diversity. Background technique [0002] When a high-speed railway train is running, the train-ground communication system plays an important role in train servo, traffic safety, and command and dispatch. The high-speed rail system puts forward strict requirements on the reliability of the vehicle-ground communication system. Compared with traditional low-speed trains, high-speed train vehicle-ground communication systems have the following characteristics: [0003] (1) High moving speed. The running speed of high-speed railway trains is high, up to 380km / h or even higher, and the high moving speed leads to Doppler expansion, which will have an adverse effect on wireless communication; [0004] (2) The entire system has many devices and is widely distributed. During the opera...

AI Technical Summary

Problems solved by technology

[0005] (3) Large data traffic

There are severe Doppler spread and large dynamic fast fading in the working channel environment. In the case of single-channel reception, even if the transmission power can be increased, the ideal communication effect cannot be obtained.

Images