Adaptive system and method based on Manchester encoding and decoding
An adaptive system, coding and decoding technology, applied in the field of communication, can solve problems such as improving transmission performance, unable to reduce communication costs, etc., to achieve the effect of reducing bit error rate, chip cost, and power consumption
Active Publication Date: 2018-10-12
CHONGQING CHUANYI AUTOMATION
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[0004] In view of the above-mentioned shortcoming of the prior art, the purpose of the present invention is to provide a kind of adaptive system and method thereof based on Manchester codec, for solving the communication between fieldbus instruments in the prior art, when using Manchester codec communication , unable to reduce communication cost and improve transmission performance
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[0038] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0039] see Figure 1 to Figure 7 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arb...
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The invention provides a self-adaptive system based on Manchester coding and decoding, and a method thereof. The system comprises a receiving circuit suitable for adjusting a corresponding baud rate according to a baud rate control signal and decoding a Manchester signal so as to generate a corresponding waveform signal; a processing suitable for detecting whether the waveform signal has a falling edge, calculating an average time of three lead code levels corresponding to the falling edge when a falling edge waveform signal is detected, adjusting the baud rate by using half of the average time as a period, generating a corresponding baud rate control signal, and stopping receiving when the values corresponding to any three continuous lead code levels are unchanged; a protocol conversion unit suitable for converting source data into data according with a preset format; and a sending circuit suitable for the baud rate identical with the Manchester signal according to the baud rate control signal and sending the Manchester signal. The baud rate is adjusted in the self-adaptive manner according to different transmission distances, the communication speed is lowered, and the transmission accuracy is improved.
Description
technical field [0001] The invention relates to the field of communication technology, in particular to an adaptive system and method based on Manchester codec communication. Background technique [0002] Manchester code Manchester code (split-phase code or two-way code), is a code that uses level jumps to represent 1 or 0, and its change rule is very simple, that is, each symbol uses two level signals with different phases Indicates that it is a periodic square wave, but the phases of the two code bits 0 and 1 are just opposite. [0003] Fieldbus instruments usually use Manchester code for communication. However, the cost of communication is high and the performance of data transmission is not good. The power consumption of the chip is relatively high, generally requires 100mA working current, which increases the cost of system operation; second, when the fieldbus instrument is transmitted over a long distance, the baud rate cannot be automatically adjusted according to th...
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IPC IPC(8): H03M5/12
Inventor 赵俊奎饶晓红张仪
Owner CHONGQING CHUANYI AUTOMATION