A method of time synchronization signal processing based on fm frequency modulation broadcasting signal

A time synchronization and signal processing technology, applied in synchronization devices, wireless communication, multiplexing communication, etc., can solve the problems of high energy consumption, large computing overhead, high cost, and achieve high timing accuracy, wide application range, The effect of strong environmental adaptability

Active Publication Date: 2018-04-20
ZHEJIANG UNIV
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Problems solved by technology

GPS has high synchronization accuracy, but its cost is high, energy consumption is high, and synchronization accuracy will be greatly affected in harsh environments
NTP can achieve high-precision computer time calibration on the network, but it is computationally intensive and has a large computational overhead

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  • A method of time synchronization signal processing based on fm frequency modulation broadcasting signal
  • A method of time synchronization signal processing based on fm frequency modulation broadcasting signal
  • A method of time synchronization signal processing based on fm frequency modulation broadcasting signal

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Such as image 3 Shown, the system that the inventive method implements can adopt and comprise FM broadcast audio signal sampling module I, FM broadcast audio signal characteristic detection module II and time synchronous control module III; D sampling, the sampling result is the digitized voltage value of the FM broadcast audio signal, and then the digitized voltage value of the FM broadcast audio signal is sent to the FM broadcast audio signal characteristic detection module II; the FM broadcast audio signal characteristic detection module II is under the control of the time synchronization state machine According to the different states of the time synchronization state machine, the digitized voltage value of the FM broadcast audio signal is detected, and the detection result is sent to the time synchronization control module III; Judgment, a...

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Abstract

The invention discloses a time synchronization signal processing method based on FM broadcast signals. The method comprises the steps that the FM broadcast audio signals are subjected to A / D sampling and converted into digital voltage values; real-time detecting and processing are conducted to obtain feature results of the FM broadcast audio signals; the feature results are judged and matched with five-short-and-one-long signals to complete time synchronization. When integral time approaches, the digital voltage values are processed and judged in real time so as to start real-time detection of the five-short-and-one-long signals for FM integral time broadcasting. According to the method, time synchronization is realized through a mode matching method; since time synchronization can be realized just by conducting simple A / D sampling on the FM broadcast audio signals, the implementation difficulty is low, and cost is low; moreover, the time synchronization accuracy is high and can reach 20 micron seconds theoretically; a common microprocessor can be used for time synchronization, so that the application range is wide.

Description

technical field [0001] The invention relates to a method for time synchronization of a wireless sensor network, in particular to a method for processing time synchronization signals based on FM broadcast signals. Background technique [0002] Wireless sensor network (Wireless Sensor Networks, WSN) is a frontier hot research field that is currently attracting attention, involving a high degree of cross-discipline and highly integrated knowledge. In wireless sensor networks, time synchronization is an important part. Sensor data fusion and sensor node self-location require the clocks between nodes to be synchronized. [0003] At present, the methods widely used in time synchronization of wireless sensor networks mainly include GPS (Global Positioning System)) and NTP (Network Time protocol). GPS has high synchronization accuracy, but its cost is high, energy consumption is large, and synchronization accuracy will be greatly affected in harsh environments. NTP can realize hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04J3/06
CPCH04J3/0635H04W56/00
Inventor 张富军史治国陈积明程鹏罗尧治沈雁彬
Owner ZHEJIANG UNIV
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