PS-64-QAM IMDD transmission method and system based on polar code coding

A technology of PS-64-QAMIMDD and transmission method, applied in the field of transmission method and system based on polar code coding PS-64-QAMIMDD, to achieve the effect of system performance improvement

Active Publication Date: 2020-04-14
SUZHOU UNIV
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However, CCDM requires long block lengths and is

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  • PS-64-QAM IMDD transmission method and system based on polar code coding
  • PS-64-QAM IMDD transmission method and system based on polar code coding
  • PS-64-QAM IMDD transmission method and system based on polar code coding

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Embodiment Construction

[0044]The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0045] PAPR suppression becomes particularly important in OFDM systems. Selective Mapping (SLM) can multiply different phase sequences with the same OFDM signal to select the phase sequence corresponding to the smallest PAPR for transmission. Also, polar codes reach the Shannon limit at the cost of lower complexity and have no error floor compared to LDPC codes. Therefore, it is attractive to concatenate probability shaping based on look-up table and polarity coding for improving the performance of PS-64-QAM system.

[0046] figure 1 The polar code PS system architecture is shown. First, the uniformly distributed binary bits are input into the PS encoder to create a transmission mode ...

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Abstract

The invention discloses a PS-64-QAM IMDD transmission method and system based on polar code coding. The method is used in a transmitting end, and comprises the steps: inputting binary bits which are uniformly distributed into a PS encoder, and creating a transmission mode lookup table, thereby generating K data bits and M selection bits; performing pseudo-random interleaving operation on the K bits, and inputting the K bits into a system polarization code encoder. The invention has the beneficial effects that experiments prove that in an IM/DD 64-QAM OFDM transmission system, the performance of the system is greatly improved through probability shaping and PAPR suppression in combination with system polarization code error correction. It can be seen that 7dB and 4dB performance improvements are obtained under the condition that the BER is 3.8 * 10 <-3 > before FEC and after FEC according to the scheme of the invention. Moreover, the redundant information of the PS and the SLM is skillfully put into the frozen bit of the polar code, so the redundancy of the whole transmission system is ensured to be constant.

Description

technical field [0001] The invention relates to the field of communications, in particular to a PS-64-QAM IMDD transmission method and system based on polar code coding. Background technique [0002] With the rapid development of digital communication in recent years, people's demand for high-speed data transmission in optical networks is constantly increasing. In order to ensure the reliable, efficient and stable long-distance transmission of the system, the probability shaping technology has a good application prospect with its flexible information rate and excellent OSNR tolerance. [0003] Intensity-modulated direct detection (IM / DD) orthogonal frequency division multiplexing (OFDM) is a very promising candidate for next-generation passive optical networks (NG-PON) due to its simple configuration and low cost. However, the requirement of Hermitian symmetry almost halved the spectral efficiency. Compared with the 16-QAM signal, the 64-QAM signal can increase the spectra...

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Application Information

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IPC IPC(8): H04L1/00H04L27/26
CPCH04L1/0057H04L27/2617H04L1/0071
Inventor 高明义沙炎平
Owner SUZHOU UNIV
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