Frame synchronization method and realizing device based on paralleling tactic

Abstract

The invention discloses a frame synchronization method and an implementation device based on the parallel strategy, belonging to the digital information transmission technical field. The method includes the steps as follows: the synchronization position, the maintaining process and the update process are initialized; the detection is processed and the detection result is recorded and stored; the maintaining process is judged if the maintaining process is failed; meanwhile, the update process is judged if the update process is successful and the judgment result is stored; under the situation that the maintaining process is failed and the update process is successful, the original synchronization is replaced with a new synchronization; otherwise, the original synchronization is maintained and the frame synchronization information is outputted; the implementation device comprises six modules, including a cross-operation operation module, a synchronization position detection module, a non-synchronization position detection module, a synchronization maintaining module, a synchronization update module and a state update module. The frame synchronization method and the implementation device realize the reliable frame synchronization under the unknown fading channel situation through the receiving of the cross-correlation operation, the parallel strategy, the detection sub-strategy, fault-tolerance sub-strategy and the adjustment sub-strategy of the sequence; the frame synchronization method and the implementation device can overcome a plurality of channel non-ideal properties in the broadband wireless transmission system.

Description

technical field [0001] The invention belongs to the field of digital information transmission, and in particular relates to a parallel strategy-based frame synchronization method against unknown fading in a broadband wireless mobile communication channel and a realization device thereof. Background technique [0002] Almost all digital communication systems require reliable frame synchronization technology to obtain the starting position of the data frame at the receiving end. Receiver frame synchronization can be performed by means of known synchronization information contained in the transmitted signal. For a continuous stream system, the synchronization information is generally a training sequence periodically inserted in the transmitted data stream; for a burst mode system, the synchronization information is generally a preamble sequence placed in front of each transmitted data packet. According to the signal estimation theory, in the absence of prior information, the o...

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the frame synchronization method based on the "keeping strategy" in the known technology is easy to frequently enter the out-of-synchronization state under an unknown fading channel and cannot quickly return to the synchronization state after entering the out-of-step state and other defects, re-develop a frame synchronization method and its implementation device to overcome these defects

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