A large-scale mimo beam-domain channel tracking method in high-speed rail scenarios

A beam-domain, large-scale technology, applied in the field of massive MIMO beam-domain channel tracking, can solve problems such as high pilot overhead and high complexity of channel tracking algorithms

Active Publication Date: 2021-03-02
NANJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

Its shortcoming is that when this paper performs time-domain channel tracking, the pilot overhead is relatively large, and the complexity of the channel tracking algorithm is relatively large

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  • A large-scale mimo beam-domain channel tracking method in high-speed rail scenarios
  • A large-scale mimo beam-domain channel tracking method in high-speed rail scenarios
  • A large-scale mimo beam-domain channel tracking method in high-speed rail scenarios

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Embodiment Construction

[0052] The invention discloses a massive MIMO beam domain channel tracking method in a high-speed rail scene. combine figure 1 As shown, the communication system and its channel model involved in this embodiment are:

[0053] To establish a widely used two-hop high-speed rail communication system, it is assumed that the base station and the top of the train are deployed with a uniform linear array, with 64 antennas on the base station side and 41 terminals on the top of the train, with one antenna for each terminal. The specific communication process is as follows: the antenna array on the top of the train is responsible for receiving signals from the base station, and the user communicates with the antenna array on the top of the train through the WiFi AP deployed inside the train. The present invention only considers the communication layer between the base station and the antenna array on the top of the train.

[0054] Considering the downlink, since there are 64 antennas...

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Abstract

The invention provides a large-scale MIMO beam space channel tracking method under a high-speed railway scene. Firstly, aiming at the large-scale MIMO high-speed railway scene, according to LTE-R criteria, The transfer equations of beam space channel (see description ) and beam space channel autocorrelation R are established respectively, and the state equations between the received signal y and the transmitted signal s are also established. Then, according to the state equation and the transfer equation, Kalman filter is used to track the channel in the beam space. Using the tracking results,the performance is evaluated by the normalized channel tracking error nrmsen. The method of the invention greatly reduces the pilot overhead and the complexity of the channel tracking algorithm, thereby improving the channel tracking performance of the whole high-speed railway large-scale MIMO system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a massive MIMO beam domain channel tracking method in a high-speed rail scene. Background technique [0002] In recent years, with the popularization of high-speed railways, wireless communication technology in high-mobility scenarios has gradually become a research hotspot. With the advent of the 5G (Fifth Generation Communication) era, when the speed of the train reaches or even exceeds 350km / h, the 5G communication system must be able to provide good services for the users, mainly reflected in the high transmission rate and low delay. At present, the most popular high-speed rail mobile communication system is GSM-R (Global System for Mobile Communications-Railway), which supports a maximum transmission rate of less than 200Kbps, while 5G requires a data transmission rate of 150Mbps or even higher in high-mobility scenarios. Obviously Traditional GSM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04B7/0413H04W4/42
CPCH04B7/0413H04L25/0204H04L25/0228H04W4/42
Inventor 徐友云周乔李大鹏陈建平王云峰
Owner NANJING UNIV OF POSTS & TELECOMM
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