A smart reflective surface-assisted channel estimation and detection method under high-speed rail
An auxiliary channel and detection method technology, applied in vehicle wireless communication services, location information-based services, transmission monitoring, etc., can solve problems such as low data rate, mobile interruption, strong penetration loss, etc., to improve accuracy, reduce Small impact, the effect of reducing channel error
Active Publication Date: 2021-03-02
EAST CHINA JIAOTONG UNIVERSITY
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The traditional high-speed rail scene has the characteristics of high-speed movement, strong penetration loss, mobile interruption, and low data rate.
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[0020] The present invention will be described in further detail below in combination with examples of implementation and with reference to the accompanying drawings.
[0021] The invention is an intelligent reflective surface-assisted channel estimation and detection method under high-speed rail. In the invention, the train mobile relay acts as an intermediary for communication between users and source base stations, and users in the train communicate with the train mobile relay. In the present invention, the base station in the fixed orbit environment is the source base station, and a plurality of IS auxiliary communication devices are arranged beside the source base station, and channel estimation and detection are performed on fast time-varying channels through IS compensation and using historical experience channels.
[0022] The channel estimation and detection method of the present invention comprises the following steps:
[0023] Step 1. The train mobile relay replaces...
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The invention discloses an intelligent reflective surface (IS)-assisted channel estimation and detection method under high-speed rail, which belongs to the field of rail transit wireless communication. Aiming at the problem of fast time-varying channel estimation caused by IS-assisted mobile communication, a method of channel estimation accuracy and signal recovery after IS-assisted communication is proposed through historical experience channel estimation and synthetic channel detection. The method includes the following steps: firstly, a flow chart of the present invention is given, and a high-speed rail wireless channel estimation mathematical model is established according to the block diagram; then, channel estimation is performed on the channel; finally, through a signal detection method, a higher channel estimation With high accuracy, the input bit stream can be recovered better. The intelligent reflective surface (IS) assisted channel estimation and detection method under the high-speed rail of the present invention can accurately estimate the current channel characteristics by using the historical channel estimation value, and recover the input signal bit stream better through synthetic channel detection.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to an intelligent reflective surface-assisted channel estimation and detection method under high-speed rail. Background technique [0002] The wireless communication technology under the high-speed rail channel is constantly innovating and improving. The traditional high-speed rail scene has the characteristics of high-speed movement, strong penetration loss, mobile interruption, and low data rate. Compared with the traditional direct channel, the intelligent reflective surface (IS) assisted communication can dynamically compensate the deficiencies such as Doppler shift, high mobile interruption, and multipath effect of the communication while adding a reflective channel to the communication. Therefore, it is necessary to study the application of IS-assisted communication in high-speed rail scenarios. Contents of the invention [0003] The purpose of the present i...
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IPC IPC(8): H04B17/309H04L25/02H04W4/029H04W4/42
CPCH04L25/0256H04B17/309H04W4/029H04W4/42
Inventor 丁青锋石辉罗静
Owner EAST CHINA JIAOTONG UNIVERSITY