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Decoding system and decoding method of BMC code

A jumping, sub-module technology, applied in the field of communication, can solve the problems of uneven transmission medium, large frequency deviation of the receiving end, noise, electromagnetic environment, etc., to achieve the effect of eliminating burr interference, low cost, and high decoding accuracy

Inactive Publication Date: 2018-09-18
AMICRO SEMICON CORP
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Problems solved by technology

The PD protocol allows the code to have a frequency deviation of + / -10%. However, in practical applications, due to the uneven quality of the transmission medium, the length of the channel, or the influence of noise and electromagnetic environment, BMC coded signals are very common. end frequency deviation tends to be larger

Method used

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  • Decoding system and decoding method of BMC code
  • Decoding system and decoding method of BMC code
  • Decoding system and decoding method of BMC code

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Embodiment Construction

[0017] The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention. It should be understood that the specific embodiments described below are only used to explain the present invention, not to limit the present invention.

[0018] like figure 1 The decoding system of the BMC code shown includes a filtering module, a transition analysis module and a data decoding module connected in series. Wherein, the filtering module is used to receive the input signal encoded by BMC, and output the filtered signal after filtering the input signal. The transition analysis module is configured to receive the filter signal output by the filter module, and analyze whether the current transition is a data transition according to the transition edge and transition time interval of the filter signal. The data decoding module is used to control the shift register in the data decodi...

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Abstract

The invention relates to a decoding system and decoding method of a BMC code. The decoding method of the BMC code includes the following steps: firstly, filtering an input signal by using a filteringmodule, eliminating burr interference, and then performing jump edge detection and analysis on the filtered signal to avoid the effect of strong pulse width distortion on the signal, and finally, carrying out decoding according to a jump edge detection result. High decoding accuracy and decoding efficiency can be achieved. In addition, the decoding system using the decoding method is simple in structure and low in cost.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a decoding system and a decoding method of a BMC code. Background technique [0002] The USB Type-C Power Delivery protocol (hereinafter referred to as the PD protocol) is a power transmission protocol based on the Type-C interface. USB PD supports a variety of voltage and current combinations, up to 100W (20V / 5A) power transmission, and supports power supply role switching to meet the power supply needs of most electronic devices. In the USB Type-C interface, the CC line is used as a dedicated plug detection and PD communication channel. It uses a half-duplex communication mechanism and uses BiphaseMark Coding (BMC) to transmit data. This method is simple and flexible, has been published as a PD communication standard, and is gradually being widely used. BMC coding belongs to a phase modulation coding technology, which is a coding method that mixes clock and data for tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H03M5/12
CPCH03M5/12H04L25/03828
Inventor 赵旺
Owner AMICRO SEMICON CORP
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