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A satellite communication burst timing synchronization system

A technology of timing synchronization and satellite communication, which is applied in the field of satellite wireless communication, can solve problems such as large timing errors, and achieve the effect of overcoming large synchronization errors

Active Publication Date: 2018-10-12
成都国恒空间技术工程股份有限公司
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Problems solved by technology

However, the timing synchronization method using a voltage-controlled oscillator to control the sampling moment is not suitable for burst timing synchronization; the timing synchronization method based on autocorrelation processing has the disadvantage of large timing errors when there are few known unique codes

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  • A satellite communication burst timing synchronization system
  • A satellite communication burst timing synchronization system
  • A satellite communication burst timing synchronization system

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Embodiment Construction

[0022] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0023] After the receiving end completes the whole network frequency synchronization and the whole network clock synchronization processing, the received burst has a small frequency deviation and time deviation (the frequency deviation is less than one thousandth of the symbol rate, and the time deviation is within a few symbols predicted ). Bursts will occur within pre-known time windows, ie slots. The timing synchronization of the burst is transformed into the location of the best sampling point of the burst in the known time slot.

[0024] Due to the small number of unique codes contained in the burst, there is an error in the best sampling point found by using the correlation energy algorithm; therefore, the present invention uses a tw...

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Abstract

The invention discloses a satellite communication burst timing synchronization system, comprising a first timing synchronization unit and a second timing synchronization unit, wherein the first timing synchronization unit comprises a first timing synchronization module for acquiring the position of burst signals in a received signal sequence, a first cache module for caching the received signal sequence, and a first extraction module for extracting complete burst signals from the received signal sequence in the first cache module according to the position of the burst signals in the received signal sequence; and the second timing synchronization unit comprises a second timing module for acquiring and outputting an optimal sampling point of the burst signals, a second cache module for caching the burst signals, and a second extraction module for extracting an optimal sampling sequence of the burst signals from the burst signals in the second cache module according to the optimal sampling point of the burst signals. The system can accurately locate the optimal sampling position of a little unique code burst.

Description

technical field [0001] The invention relates to the technical field of satellite wireless communication, in particular to a satellite communication burst timing synchronization system. Background technique [0002] Time Division Multiple Access (TDMA) satellite communication system uses burst mode communication. A known unique code field is included in the burst for synchronization at the receiving end. It is known that the more unique code fields, the better the synchronization performance of the receiving end, but the lower the data transmission efficiency. Due to the extremely precious satellite bandwidth resources used in satellite communications, in time-division multiple access satellite communication systems, bursts containing more unique codes are usually used for network-wide synchronization, and bursts containing fewer unique codes are used for transmission services data or system information. [0003] The burst timing synchronization technology is a technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06
CPCH04J3/0635
Inventor 朱南赵深林邹刚姜彬丁伟
Owner 成都国恒空间技术工程股份有限公司
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