Spread spectrum synchronization method and device based on adaptive threshold

An adaptive threshold and adaptive gate technology, applied in the field of spread spectrum communication, can solve the problems of many false alarms and low synchronization accuracy, and achieve the effect of eliminating false alarms and precise system synchronization
CN105049080AActive Publication Date: 2015-11-11SICHUAN JIUZHOU ELECTRIC GROUP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN JIUZHOU ELECTRIC GROUP
Publication Date
2015-11-11

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Abstract

The invention discloses a spread spectrum synchronization method and device based on an adaptive threshold, belongs to the technical field of spread spectrum communication, and aims to solve the technical problems of the presence of a large quantity of false-alarm phenomena and low synchronization accuracy in an existing spread spectrum synchronization method. The spread spectrum synchronization method based on the adaptive threshold comprises the following steps: performing statistics on a segment of receipt signal according to a local spread spectrum sequence in a clock period to form a comparison decision value, and meanwhile forming an adaptive threshold value based on the segment of receipt signal; and if a comparison decision value formed in a middle clock period is greater than the comparison decision values formed in other clock periods in a plurality of clock periods, and the comparison decision values formed in the middle clock period and two clock periods before and after the middle clock period are greater than the adaptive threshold values formed in the clock periods respectively, judging that the receipt signal of the middle clock period is synchronous to the local spread spectrum sequence.
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Description

technical field

[0001] The invention relates to the technical field of spread spectrum communication, in particular to a spread spectrum synchronization method and device based on an adaptive threshold. Background technique

[0002] During data communication, the receiver must have precise synchronization in order to accurately recover the transmitted data. For burst data communication, the information transmission is discontinuous, so it is difficult to achieve synchronization through the feedback loop. The usual solution is to use spread spectrum technology to insert a set of spread spectrum sequences before the transmitted data frame as a system Synchronize. The receiving end forms a judgment quantity by performing correlation statistics calculation on the spread spectrum sequence, and judges a position exceeding a threshold in the judgment quantity as a synchronous position.

[0003] In a wireless communication system, the received signal will be affected by the wirele...

Claims

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