Frame synchronization method and device applicable to burst communication system

Abstract

The invention discloses a frame synchronization method applicable to a burst communication system. A multi-path segmented coherence relevance mode with different segmentation lengths is adopted in an initial signal channel access stage, the maximum relevance value of each branch path is adopted for carrying out double-threshold value (relative threshold value and absolute value) judgment, the synchronous confirmation is carried out from the position with the relevance value exceeding the threshold value, and the influence of severe environment factors in the initial signal channel access stage is overcome through the setting of proper double threshold values and conforming windows; and a full coherence relevance mode is adopted in a stable communication stage, the prior double threshold values and conforming window width are set according to the signal channel information recorded in the conforming windows in the initial signal channel access stage, and the method and the device have higher adaptability through different frame synchronization methods adopted in different communication stages.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a frame synchronization method suitable for a burst communication system. The invention also relates to a frame synchronization device suitable for burst communication systems. Background technique [0002] The multi-access technology is one of the key technologies in the modern communication field. Its core problem is how to realize channel sharing and information exchange among multiple communication users in a specific transmission environment in a timely, concurrent and accurate manner. The application of channel time-division multiplexing technology makes multiple communication users become information sources with burst characteristics. When there is data to be transmitted, the users realize the burst transmission of data within their allowed time slots. Bursty communication systems have widely existed in multi-access communication systems. With the significant growth of ...

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Problems solved by technology

Because the main lobe of the correlation peak curve usually has a certain width, there is usually more than one point exceeding the threshold, and this method cannot determine whether to find the point with the largest correlation peak

Moreover, since the correlation peak at the wrong position is greater than the correlation peak at the correct position, the setting of a single relative threshold is prone to missynchronization

In view of the complex network environment of the channel, the synchronizer cannot find a universal threshold that is suitable for all situations

When this method adopts a single threshold setting and is applied to an actual system, it is prone to missed detection, false detection or false alarm events, thereby reducing the synchronization performance of the system

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