A data precoder, system and encoding method
A precoder and data encoding technology, which is applied in the field of communication, can solve the problems of exceeding the dispersion tolerance requirements, severe dispersion, and high bit error rate of optical signal transmission.
Active Publication Date: 2019-04-19
HUAWEI TECH CO LTD
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Problems solved by technology
If the transmission rate of the PON system is increased from 10Gbps to 25Gbps, the dispersion tolerance of the PON system will be reduced from 1000ps / nm to 160ps / nm, that is, for a PON system with a transmission rate of 25Gbps, the use of existing technologies will lead to very serious system dispersion , which far exceeds the dispersion tolerance requirements of the system, which will make the bit error rate during optical signal transmission extremely high, which in turn will cause the receiving end to fail to receive the optical signal correctly
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[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0050] figure 1 A schematic block diagram of a data precoder is shown. The data precoder includes:
[0051] A parallel-to-serial and serial-to-parallel converter, which is used to convert the input serial data stream from serial to parallel based on the reference clock, output the converted parallel data stream, and generate a data recovery clock; and The coded parallel data stream read from the buffer is converted from parallel to serial, and the serial...
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Disclosed in the present invention is a data pre-coder for performing serial-to-parallel conversion on an inputted serial data stream on the basis of a reference clock, outputting the converted parallel data stream, and generating a data recovery clock; performing the parallel-to-serial conversion on the coded parallel data stream read out by buffer, and outputting the serial data stream; synchronously XOR coding the converted parallel data stream based on the data recovery clock, and outputting the coded parallel data stream; writing the coded parallel data stream into the buffer based on the data recovery clock; and reading out, based on the data transmission clock, the coded parallel data stream which is buffered, and transmitting the coded parallel data stream which is read out to the serial-to-parallel and parallel-to-serial converter for being processed. With said pre-coding method, the coding and decoding of high-speed data stream is simpler, and data code rate in the transmission process is very low thus significantly enhancing the performance of high-speed transmission system.
Description
technical field [0001] The present invention relates to the communication field, in particular to a data precoder, a system and a coding method in the communication field. Background technique [0002] With the large-scale deployment of optical fiber access, the bandwidth requirements of optical access are increasing. At present, the mainstream of optical access adopts Passive Optical Network (PON) technology. PON network is a point-to-multipoint Passive optical network system. A PON network includes an optical line terminal (Optical Line Terminal, OLT) installed in a central control station, and a batch of supporting Optical Network Units (Optical Network Unit, ONU) installed in user sites. An optical distribution network (Optical Distribution Network, ODN) between the OLT and the ONU includes optical fibers and passive optical splitters or couplers. [0003] PON technology continues to evolve and develop, and the rate continues to increase. The Ethernet Passive Optical ...
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IPC IPC(8): H04B10/516H04L1/00
CPCH04L1/00
Inventor 叶志成李胜平
Owner HUAWEI TECH CO LTD