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Secondary channels in pam/qam systems using redundant constellation points

An optical communication system and signal technology, applied in transmission systems, multi-carrier systems, digital transmission systems, etc., can solve problems such as weak timing functions

Active Publication Date: 2021-07-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some imperfections such as bandwidth limitation and chromatic dispersion can result in very poor timing capabilities

Method used

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  • Secondary channels in pam/qam systems using redundant constellation points
  • Secondary channels in pam/qam systems using redundant constellation points
  • Secondary channels in pam/qam systems using redundant constellation points

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Embodiment Construction

[0040] In some embodiments, the present invention relates to wireless communications, and more particularly, but not exclusively, to methods and systems for wireless communications through access points (APs).

[0041] Big data centers in a large campus may be far away from each other, for example, a few hundred meters to 2 kilometers (km) apart or even farther. figure 2 The two data centers in (denoted A and B) are connected via two transceivers and connected by multiple links. Data centers exchange digital information. Each data center has a transceiver 101,102. However, these transceivers may reside in a common data center. Transceivers are assembled by the DSP at the transmit and receive ends (referred to herein as Tx and Rx) to improve performance. The best performance can be achieved with optimal Tx / Rx DSP configuration. To configure Tx / Rx, additional DSP information is exchanged between Tx and Rx. For example, Tx DSP information is used to shape the transmitted si...

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PUM

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Abstract

An optical communication system comprising a transmitter adapted to generate a signal by modulating transmission data into low power consumption symbols of an amplitude modulation format and modulating monitoring data (MD) into high power consumption symbols of the amplitude modulation format , the MD includes at least one transmitter parameter and / or at least one receiver parameter for communicating the transmission data. The binary logarithm of the total number of low-power symbols and high-power symbols is a non-integer.

Description

Background technique [0001] In some embodiments, the present invention relates to communications, and more particularly, but not exclusively, to optical methods and systems for communications. [0002] Manufacturers of ultra-high-speed short-reach fiber-optic links aim to produce transceivers that are small, inexpensive, and consume little power. The main reason for these requirements is limited space for data center equipment. These transceivers are designed to support intra-data center connections as well as inter-data center connections from a few hundred meters to tens of thousands of meters. [0003] In order to reduce costs, intensity modulation (intensity modulation, IM) and direct detection (direct detection, DD) schemes are generally used. A well-established on-off keying modulation format widely used in non-coherent systems has been investigated for applications at speeds of 100 Gbit / s per wavelength. However, this solution requires expensive high-bandwidth optics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/54H04L27/34
CPCH04B10/541H04B2210/07H04L27/3477H04B10/61H04L1/0047
Inventor 内博伊沙·斯托亚诺维奇张亮克里斯汀·保罗但尼克魏金龙解长松
Owner HUAWEI TECH CO LTD