PAM-M fault-tolerant transmission system and PAM-M fault-tolerant transmission method

A transmission system, M-ary technology, applied in the field of data transmission, can solve the problems of reducing, AC coupling cannot transmit the DC component of the signal, and cannot completely eliminate the signal-to-noise ratio of the baseband drift

Active Publication Date: 2021-03-12
NOREL SYST
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In the prior art, multi-ary PAM-M coding has been used for data transmission. Compared with NRZ coding, multi-ary coding represented by PAM-M coding (M=2 N , N is an integer and N>1) has the advantage of low cable bandwidth required, but the eye diagram amplitude of PAM-M is 9.6dB smaller than that of NRZ coding, and it is more sensitive to noise, signal distortion and circuit linearity
[0006] AC coupling is often used in long-distance transmission to eliminate the influence of the ground level voltage difference between the transmitting and receiving ends on the signal, but AC coupling cannot transmit the DC component in the signal. If t

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[0113] The PAM-M fault-tolerant transmission system and method of the present invention will be further described below in conjunction with the embodiments in the accompanying drawings.

[0114] Such as figure 1 As shown, it is an embodiment of the PAM-M fault-tolerant transmission system of the present invention. In this embodiment, the PAM-M fault-tolerant transmission system includes a fault-tolerant sending device 1, a fault-tolerant receiving device 2, and a cable 3. The fault-tolerant sending device 1 passes through the cable 3 Connect the fault-tolerant receiving device 2.

[0115] The error-tolerant sending device 1 includes an M-ary error-tolerant encoding module 11 , a first serial interface 12 , and a reverse data decoding module 13 , and the error-tolerant sending device 1 may also include a sync block adding module 14 .

[0116] The error-tolerant receiving device 2 includes a reverse data encoding module 21 , a second serial interface 22 , and a forward data dec...

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Abstract

The invention provides a method for splitting data into N binary data, respectively performing error correction coding and scrambling operations, then performing binary direct-current balance coding,and finally synthesizing the N binary direct-current balance data subjected to error correction coding into M-ary direct-current balance data for data fault-tolerant transmission. The invention further provides a PAM-M fault-tolerant transmission system, forward data and reverse data are simultaneously transmitted on a cable, the forward data are subjected to M-ary direct-current balance encoding,the reverse data rate is lower than the forward data rate, the energy of the reverse data is in a low-frequency part of a frequency spectrum, and the energy of the forward data is in a high-frequencypart of the frequency spectrum. The beneficial effects of simplifying the circuit design and reducing the data error rate are achieved.

Description

technical field [0001] The invention relates to the technical field of data transmission, in particular to the technology of bidirectional fault-tolerant transmission through multi-ary PAM-M coding. Background technique [0002] With the rapid development of automatic driving and assisted driving technology, the demand for high-speed data transmission in vehicle electronic systems is increasing day by day. Wired transmission technology uses cables to transmit data. Compared with wireless transmission, wired transmission is faster and more stable. High security and thus gaining mass adoption. [0003] The main applications in vehicle data transmission are vehicle radar data, display video data and camera data. The image resolution of the display screen and the camera has undergone a stage of rapid development, and has been upgraded from standard definition and high definition (1080P) to ultra high definition (2K / 4K). The popularization has put forward higher requirements fo...

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/004H04L1/0058H04L1/0061
Inventor 王元龙陈淼
Owner NOREL SYST
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