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High-speed burst demodulation synchronizing device

A synchronization device, high-speed technology, applied in the direction of the synchronization device, the shaping network in the transmitter/receiver, electrical components, etc., to reduce the probability of false alarms, improve data transmission efficiency, and facilitate hardware implementation

Active Publication Date: 2013-05-15
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual solution is to insert a preamble with a specific pattern before each burst data packet for clock and carrier synchronization. The preamble as a system overhead reduces data transmission efficiency, and the transmission efficiency is even lower for short burst data packets

Method used

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  • High-speed burst demodulation synchronizing device

Examples

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Embodiment Construction

[0023] refer to Figure 1 to Figure 4 , the present invention's analog-to-digital converter (A / D) 1, down-conversion unit 2, first to second matched filters 3-1 to 3-2, frame header positioning 4, timing recovery 5, decoding 6; as figure 1 as shown, figure 1 It is the electric principle block diagram of the embodiment of the present invention, and the embodiment is according to figure 1 Connect the lines. Among them, the role of the analog-to-digital converter (A / D) 1 is to perform analog-to-digital conversion on the demodulated signal; the role of the down-conversion unit 2 is to down-convert the signal, convert the intermediate frequency signal into a low-frequency baseband signal, and use one signal Two channels of information are recovered. The effect of the first to the second matched filter 3-1 to 3-2 is to filter out the noise and image frequency in the signal, so as to obtain more accurate information to facilitate better demodulation later; the effect of frame h...

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Abstract

The invention discloses a high-speed burst demodulation synchronizing device, and relates to symbol timing synchronization in burst communication in the communication field. The device comprises an analog-to-digital converter, a down-conversion unit, a first match filter, a second match filter, a timing recovery unit and a decoding unit, as well as a frame header positioning unit. The device realizes carrier synchronization and timing synchronization on the basis of a preferential sequence of a specific pattern rather than a feedback loop, and realizes timing synchronization of symbols by adopting a method of combining symbol sequence energy matching and threshold adaptability. The device has the characteristics of short synchronization time, high efficiency and wide application range, and carries out windowing at the moment of grouping a synchronization sequence by combing the cross-layer optimization design and with the auxiliary complexing.

Description

technical field [0001] The invention relates to a grouping fast synchronization technology in the high-speed burst communication occasion, it relates to the symbol timing synchronization in the burst communication in the communication field, and is especially suitable for the burst data communication system application with high-speed modulation and demodulation. Background technique [0002] Burst communication is widely used in communication systems such as TDMA system and wireless ad hoc network. In these systems, data communication is carried out in a burst mode, and its information transmission is discontinuous, which determines that it is difficult to realize carrier synchronization and timing synchronization through a feedback loop in such systems. The usual solution is to insert a preamble with a specific pattern before each burst data packet for clock and carrier synchronization. The preamble as a system overhead reduces data transmission efficiency, and the transm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03H04W56/00
Inventor 石玉景张永杰卢泳兵
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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