Method for carrier frequency offset compensation of receiving signals under high-speed rail environment

A technology of carrier frequency offset and receiving signals, applied in the shaping network in the transmitter/receiver, communication between multiple stations, baseband system components, etc., can solve problems such as fast channel estimation difficulties, and achieve calculation methods The effect of simple and efficient, good performance

Inactive Publication Date: 2012-08-22
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, these methods require accurate channel estimation. It is very difficult to achieve fa

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  • Method for carrier frequency offset compensation of receiving signals under high-speed rail environment
  • Method for carrier frequency offset compensation of receiving signals under high-speed rail environment
  • Method for carrier frequency offset compensation of receiving signals under high-speed rail environment

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[0018] The present invention will be further described below in conjunction with the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation mode and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0019] Such as figure 1 As shown in the present invention, a carrier frequency offset compensation method used in a high-speed railway environment has specific steps as follows:

[0020] (1) In the high-speed railway communication system, the high-speed rail train obtains the current train's position information through GPS positioning or wheel-rail positioning technology. When the high-speed rail train receives the i-th symbol y of the downlink communication data sent by the base station i Calculate the horizontal distance d between the train and the base station at this time according to the pos...

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Abstract

A method for the carrier frequency offset compensation of receiving signals under high-speed rail environment comprises the steps of obtaining the position information of a current train by a high-speed rail train, calculating the horizontal distance between the train and a base station; calculating a carrier frequency offset value fd needing to be compensated currently; and conducting direct carrier frequency offset compensation on the signals received by a receiver of the high-speed rail train. According to the method, the carrier frequency offset value can be calculated without channel estimation, and the simplicity and the high efficiency are achieved.

Description

Technical field: [0001] The invention relates to the technical field of wireless communication, in particular to a method for the high-speed train to perform carrier frequency offset compensation on received signals when a base station performs downlink communication to the high-speed train in a high-speed railway environment. Background technique: [0002] After my country's railways have undergone several substantial speed increases, the trains are running faster and faster. The speed of the currently running high-speed railway trains has reached and exceeded 350km / h, and the requirements for the type and quality of communication services in the high-speed environment are getting higher and higher, which undoubtedly puts forward more stringent requirements for railway wireless communication. [0003] In high-speed mobile communication, Doppler frequency shift is one of the important factors affecting system performance. When the electromagnetic wave transmitter and the re...

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Application Information

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IPC IPC(8): H04B7/26H04L25/03
Inventor 熊箭邱晨归琳刘勃侯金鑫
Owner SHANGHAI JIAO TONG UNIV
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