Reliable frame synchronizing technology in data communication

A technology of data communication and frame synchronization, which is applied in the field of electrical communication, can solve problems such as difficult acquisition and frame synchronization technology, and achieve the effect of large fault tolerance, less resources, and improved quality

Inactive Publication Date: 2004-06-30
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And such frame synchronization technology i...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reliable frame synchronizing technology in data communication
  • Reliable frame synchronizing technology in data communication
  • Reliable frame synchronizing technology in data communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Accompanying drawing is also embodiment. In this embodiment, the synchronization code is formed by a group of 7-bit Barker codes 1110010 with the characteristics of a sharp autocorrelation function, and each group is composed of m (m is an odd number) Barker codes. In the way of centralized insertion, a frame synchronization code group is inserted in front of each data frame. Such as figure 2 As shown, among them, M is the synchronous code group, and U is the start word of the data frame. In order to facilitate the processing of the receiving end, the 7-bit Barker code is expanded into an 8-bit code word B, 01110010, and the inverse code of the start word is B is modulated and sent to the upper channel. Serial-to-parallel conversion is performed at the receiving end, and the data after serial-to-parallel conversion enters the frame synchronization judgment module. The frame synchronization judgment module is a software module that uses a large number of judgments to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Using corrective grouping bit sequence output from demodulator, the invented technique is completed through decision module in frame synchronization. Synchronous code is composed of 7 bits barker code. Data at sending end are sent according to frame. Frame synchronization code group and data frame start-up word are inserted in front of each data frame, which is modulated and then sent to channel. Serial-parallel conversion is carried out at receiving end. Hardware sends each word received at the receiving end to decision module in frame synchronization for further processing. The decision module in frame synchronization is controlled by specific mathematic mode. The invention combines hardware with software, providing features of simple circuit, reliable synchronization, small program size and less resources needed. Good fault tolerant capability is kept under low S/N ratio. It is easy to modify and upgrade software. Thus, the invention raises quality and security greatly.

Description

technical field [0001] The invention relates to the technology of electric communication, especially the technology of radio data communication, especially the reliable frame synchronization technology of mobile data communication. Background technique [0002] Frame synchronization is applied in various types of communication networks. There are many frame synchronization technologies, but most of them are formulated for the better transmission conditions. In the case of relatively good transmission conditions, the processing of frame synchronization is relatively simple, and the receiver can realize frame synchronization very quickly. However, it is difficult to guarantee the reliability of frame synchronization when the channel condition is poor. Although the establishment of the frame synchronization of the main components takes into account a certain channel bit error rate, if the system's fault tolerance is to be increased, the hardware implementation will become very...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04W28/02H04B7/26
Inventor 姜永广曾浩洋
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap