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
CN1509088AInactive Publication Date: 2004-06-30NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
Publication Date
2004-06-30
Estimated Expiration
Not applicable · inactive patent

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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.
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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

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