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Signal sending device, carrier phase recovery device and method

A signal transmission device and signal technology, applied in the field of communication, can solve the problems of laser phase noise sensitivity, limiting system transmission efficiency, bit errors, etc., and achieve the effect of reducing redundancy and low computational complexity

Active Publication Date: 2017-09-05
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complex modulation format is particularly sensitive to laser phase noise, which will lead to severe bit errors, which greatly limits the transmission efficiency of the system

Method used

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  • Signal sending device, carrier phase recovery device and method
  • Signal sending device, carrier phase recovery device and method
  • Signal sending device, carrier phase recovery device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] figure 1 It is a schematic diagram of the signal sending device according to Embodiment 1 of the present invention. Such as figure 1 As shown, the device 100 includes:

[0047] Insertion unit 101, configured to insert at least one amplitude-variable phase modulation signal into the data modulation signal for carrier phase recovery at the receiving end;

[0048] The sending unit 102 is configured to send a sending signal formed by inserting the phase modulation signal into the data modulation signal.

[0049] It can be seen from the above embodiments that by inserting a phase modulation signal with variable amplitude into the data modulation signal, the carrier phase recovery of the received signal is performed at the receiving end according to the phase modulation signal, which can be applied to communication systems of various modulation formats and is compatible with existing Some communication systems are compatible and have lower computational complexity. In add...

Embodiment 2

[0076] The embodiment of the present invention also provides a carrier phase recovery device, Figure 14 It is a schematic diagram of a carrier phase recovery device according to Embodiment 2 of the present invention. Such as Figure 14 As shown, the device 1400 includes:

[0077] The extraction unit 1401 is configured to extract a phase modulation signal in the received signal, wherein the phase modulation signal is a phase modulation signal with variable amplitude inserted in the data modulation signal sent by the transmitting end;

[0078] An estimation unit 1402, configured to estimate the phase noise of the received signal according to the phase modulation signal in the received signal;

[0079] The compensation unit 1403 is configured to perform phase compensation on the received signal according to the phase noise of the received signal.

[0080] It can be seen from the above embodiments that by inserting a phase modulation signal with variable amplitude into the dat...

Embodiment 3

[0105] The embodiment of the present invention also provides a transmitter, Figure 18 is a schematic diagram of the transmitter according to Embodiment 3 of the present invention. Such as Figure 18 As shown, the transmitter 1800 includes a signal sending device 1801, the structure and function of the signal sending device 1801 are the same as those described in Embodiment 1, and will not be repeated here.

[0106] Figure 19 It is a schematic block diagram of the system configuration of the transmitter according to Embodiment 3 of the present invention. Such as Figure 19 As shown, the transmitter 1900 includes: an insertion unit 1901, a sending unit 1902, a digital-to-analog conversion unit 1903, and an optical modulator unit 1904, wherein:

[0107] The insertion unit 1901 inserts at least one amplitude-variable phase modulation signal into the data modulation signal for carrier phase recovery at the receiving end; the transmission unit 1902 transmits the transmission s...

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PUM

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Abstract

The embodiments of the invention provide a signal sending device, a carrier phase recovery device and method. Amplitude variable phase modulation signals are interpolated into data modulation signals, and carrier phase recovery on received signals is performed at a receiving end according to the phase modulation signals, so that the carrier phase recovery device and method can be applied to communication systems of various modulation formats, are compatible with the existing communication systems and have relatively low computing complexity. In addition, the interpolated phase modulation signals are variable in amplitude and can be flexibly configured in the data modulation signals, so that redundancy is reduced and the capacity of a system is influenced little.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a signal sending device, a carrier phase recovery device and a method. Background technique [0002] The optical communication system occupies an important position in the communication transmission network due to the advantages of huge transmission bandwidth, great expansion potential, extremely low transmission loss and low cost. With the development of high-speed digital-to-analog conversion (DAC) chips, analog-to-digital conversion (ADC) chips and digital signal processing (digital signal processing, DSP) chips, digital coherent optical communication Technology has become the mainstream trend of next-generation communication. [0003] In order to construct a low-cost, large-capacity, and high-spectrum-efficient optical communication network, choosing a suitable modulation format is the key. As the most effective way to increase the transmission rate, the flex...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04L27/20
CPCH04L25/03273H04L27/2082H04L2025/03401H04B10/541H04B10/5561H04B10/6165H04L27/3405H04L27/361H04L27/3827H04B10/548H04L7/0075
Inventor 宿晓飞窦亮陶振宁
Owner FUJITSU LTD
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