A Dynamically Adjusted Bit Synchronization Decoding Method Based on Carrier Communication
A technology of dynamic adjustment and bit synchronization, applied in synchronization devices, digital transmission systems, electrical components, etc., it can solve the problems of carrier signal attenuation, unreliable reception, distortion, etc., and achieve the effect of transparent data signal transmission
Active Publication Date: 2015-12-09
厦门市致创能源技术有限公司
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Problems solved by technology
Due to the influence of line load characteristics, load size, line length and other factors, the carrier signal will have certain attenuation, distortion, and ringing effects when transmitted through the line, resulting in irregular demodulated waveforms at the receiving end (carrier modulation unit) Waveform, resulting in the inability to reliably, real-time, and transparently receive the information sent by the host
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[0012] like figure 1 As shown, ① is the TTL level signal, ② is the carrier signal modulated by the carrier modulation unit, ③ is the irregular level signal demodulated by the carrier demodulation unit, ④ is the TTL level output by the voltage comparator Signal, ⑤ is the TTL level signal restored by the single-chip microcomputer, which is consistent with the signal of ①, and the analog signal waveform of ③ is shown in the figure.
[0013] A carrier communication dynamic adjustment bit synchronous decoding method based on a DC power supply line or an ordinary data transmission line of the present invention includes a host at the data sending end and a slave at the data receiving end, and the TTL level signal sent by the host is modulated into a carrier signal by a carrier modulation unit After that, it is transmitted to the carrier demodulation unit of the data receiving end through the carrier wave, and the carrier signal is demodulated by the carrier demodulation unit into a l...
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The invention discloses a dynamic adjustment bit synchronization decoding method based on carrier communication. Before a master computer of a data delivering end sends data each time, N 0xAAs are continuously sent to be as a learning code of tracing, adjusting and locking for a subordinate computer of a data receiving end. After the subordinate computer receives the learning code sent by the master computer, the learning code is input into a voltage comparator of the subordinate computer. When the data delivering end begins to send the learning code to the data receiving end, a decimal add (DA) output pin outputs electrical level, and ceaselessly traces and adjusts the output electrical level until duration of high-low electrical level sent by the data delivering end is kept in accordance with duration of high-low electrical level sent by the data receiving end, and therefore accurate, reliable, real-time, and transparent data signal transmission is achieved.
Description
technical field [0001] The invention relates to the field of carrier communication of DC power supply lines or ordinary data transmission lines, in particular to a dynamic adjustment bit synchronous decoding method based on carrier communication of DC power supply lines or ordinary data transmission lines. Background technique [0002] The traditional method is to perform bit synchronous decoding processing in a static manner. Due to the influence of line load characteristics, load size, line length and other factors, the carrier signal will have certain attenuation, distortion, and ringing effects when transmitted through the line, resulting in irregular demodulated waveforms at the receiving end (carrier modulation unit) Waveform, resulting in the inability to reliably, real-time, and transparently receive the information sent by the host. Contents of the invention [0003] The present invention provides a dynamically adjusted bit synchronous decoding method based on ca...
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IPC IPC(8): H04L7/00
Inventor 陈聪敏潘云相张炳炎陈志亮陈洪新
Owner 厦门市致创能源技术有限公司