Strong truncation photon compression system and method under ultra-large constellation scale

A compression system and constellation technology, applied in the transmission system, multi-carrier system, modulated carrier system, etc., can solve the problem of unable to decode the original information normally, and achieve the effect of size reduction

Active Publication Date: 2020-04-21
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

When the constellation scale exceeds 1024QAM, the system will not be able to decode and obtain the original information normally

Method used

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  • Strong truncation photon compression system and method under ultra-large constellation scale
  • Strong truncation photon compression system and method under ultra-large constellation scale
  • Strong truncation photon compression system and method under ultra-large constellation scale

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Embodiment Construction

[0054] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] The embodiment is to the 16384QAM signal (constellation diagram such as figure 2 shown) for strong truncated photon compression modulation.

[0056] refer to figure 1 , a strongly truncated photon compression system under a super-large constellation scale of the present invention can convert a super-large-scale constellation into a non-uniformly distributed small-scale constellation, thereby realizing reliable transmission of signals, specifically including a constellation probability distribution matcher unit, a photon Compression and data projection unit, photon truncation and data modulation unit, channel estimation unit, channel feedback unit, probability adaptive unit, carrier modulation unit, optical modulator unit, channel unit, optical amplifier unit, photodetector unit, channel blind equalization unit, probabilistic dematcher...

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Abstract

The invention discloses a strong truncation photon compression system and method under an ultra-large constellation scale so that ultra-large constellation scale is reduced to a small-scale constellation for light transmission. The compression degree of the whole constellation is changed by changing the compression parameters, so that the size of the constellation is greatly reduced. In the compression process, the constellation point probability is in Maxwell Boltzmann distribution, the center probability is the highest, and the probabilities of the two sides are gradually reduced, so that compared with an original signal under an ultra-large constellation scale, the signal has lower transmitting power, and the overall cost of optical communication is saved. Different compression parameters can change the size of a constellation to form constellation diagrams with different probability distributions, information entropies can be different along with the difference of the probability distributions, and the transmission bit rate can be changed along with the information entropies under the condition that the Baud rate is not changed. At a receiving end, if signals with different compression parameters are received, the access rates are different, so that the optical communication system also has certain flexibility.

Description

technical field [0001] The invention belongs to the technical field of optical modulation transmission, and in particular relates to a strongly truncated photon compression system and method at a super large constellation scale. Background technique [0002] Since the 21st century, with the rapid development of global information technology, the network traffic generated by cloud computing, Internet of Things, multimedia services and other emerging business applications has grown rapidly, and the requirements for communication network bandwidth and capacity are getting higher and higher. . The rapid development of science and technology has promoted the continuous increase of information services, and the existing low-order digital modulation format will be difficult to meet the requirements of future communication for bandwidth, information capacity and transmission rate. Ultra-high-capacity optical communication systems urgently need to realize ultra-high-order digital mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/70H04B10/69H04L27/34
CPCH04B10/6971H04B10/70H04L27/3483
Inventor 刘博张丽佳毛雅亚姜蕾忻向军孙婷婷赵立龙吴泳锋刘少鹏宋真真王俊锋哈特
Owner NANJING UNIV OF INFORMATION SCI & TECH
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