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Timing synchronization method under high-speed mobile condition

A technology of timing synchronization and high-speed movement, applied in space transmit diversity, electrical components, transmission systems, etc., can solve problems such as performance degradation

Inactive Publication Date: 2013-05-08
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
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Problems solved by technology

Performance of such timing synchronization methods degrades in high-speed mobile environments

Method used

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  • Timing synchronization method under high-speed mobile condition
  • Timing synchronization method under high-speed mobile condition

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with accompanying drawing.

[0038] A timing synchronization method in a high-speed mobile environment, the method is based on orthogonal angle domain subspace projection, and is used to improve the frame timing synchronization performance in a high-speed mobile environment. The method specifically includes the following steps:

[0039] Step (1). Using the pre-constructed orthogonal angle domain space basis vector , for the received multi-antenna signal Orthographic projection, that is, ;

[0040] in

[0041]

[0042] In the formula, the direction vector details as follows:

[0043]

[0044] in, is the normalized length of the receiving antenna normalized by the carrier wavelength, is the normalized separation between antennas, is the number of receiving antennas, .

[0045] Step (2). On each orthogonal angle domain space, the received signal on the mth angle domain space after...

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Abstract

The invention relates to a timing synchronization method under a high-speed mobile condition. The timing synchronization method under the high-speed mobile condition includes the steps: 1, constructing space base vectors of right crossing angle domains, 2, carrying out projection on the right crossing angle domains of received signals, 3, carrying out rough timing synchronization on the right crossing angle domains, 4, carrying out equivalent Doppler estimate and compensation on the right crossing angle domains, 5, carrying out fine timing synchronization on the right crossing angle domains, and 6, carrying out fine synchronized signal combination and timing judgment on each right crossing angle domain space. According to the timing synchronization method under the high-speed mobile condition, the process of timing synchronization is divided into the rough timing synchronization and the fine timing synchronization, reference synchronization frame header is adopted to carry out frame timing synchronization, and the reference synchronization frame header comprises Q short training sequences with the cycle length of D and one long training sequence with the length of K. A first part of the reference synchronization frame header is mainly used for the rough timing synchronization and frequency synchronization, and a second part of the reference synchronization frame header is mainly used for the fine timing synchronization. When the timing synchronization method under the high-speed mobile condition is used for frequency offset estimation, acquired estimate range is large, estimate accuracy is high, and the function of noise suppression of a synchronizing system can be further improved.

Description

technical field [0001] The invention relates to a timing synchronization method in a multi-antenna system, in particular to a timing synchronization method in a high-speed mobile environment. Background technique [0002] With the continuous development and expansion of mobile communication applications, in some special occasions such as high-speed railways, it is required to achieve high-speed data transmission in a high-speed mobile environment. Among them, frame timing synchronization technology, as an important part of mobile communication transmission, is very important to mobile communication systems. How to realize time and timing synchronization of mobile communication systems in high-speed mobile environments (such as high-speed railways) is an arduous and challenging task for modern mobile communication systems. [0003] Timing synchronization techniques in mobile communication systems are mainly divided into two categories: data-assisted timing synchronization me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7077H04B7/04
Inventor 曾嵘
Owner HANGZHOU DIANZI UNIV
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