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A signal transmitting method, a signal receiving method, and related equipment and system

A signal transmission and signal technology, applied in the field of communication, can solve the problems of high cost and difficult implementation.

Active Publication Date: 2020-11-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Embodiments of the present invention provide a signal transmitting method, a signal receiving method, and related equipment and systems, so as to solve the problems of high cost and difficult implementation in existing methods for improving the reliability of QAM systems

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  • A signal transmitting method, a signal receiving method, and related equipment and system
  • A signal transmitting method, a signal receiving method, and related equipment and system
  • A signal transmitting method, a signal receiving method, and related equipment and system

Examples

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Embodiment 1

[0089] In order to solve the problems of high cost and difficult implementation in the existing methods for improving the reliability of the QAM system, the first embodiment of the present invention provides a signal transmission method, specifically, as image 3 As shown, it is a schematic flowchart of the signal transmission method described in Embodiment 1 of the present invention, and the signal transmission method may specifically include the following steps:

[0090] Step 301: Generate a single-wavelength optical carrier;

[0091] Step 302: Split the single-wavelength optical carrier into N sub-carriers with the same wavelength based on the splitting device, and the value of N is a positive integer not less than 2;

[0092] Step 303: Perform data modulation and amplitude spread spectrum modulation on the N channels of subcarriers according to N channels of low-speed data signals and N channels of spreading codes to obtain N channels of modulated spread spectrum signals; the N ch...

Embodiment 2

[0119] The second embodiment of the present invention provides a signal receiving method, specifically, as Figure 4 As shown, it is a schematic flowchart of the signal receiving method described in Embodiment 2 of the present invention, and the signal receiving method may specifically include the following steps:

[0120] Step 401: Receive the signal transmitted by the signal transmitting device. The signal is based on the N low-speed data signals and N low-speed data signals after the signal transmitting device splits the generated single-wavelength optical carrier into N sub-carriers with the same wavelength by the splitting device. Channel spreading codes, data modulation and amplitude spread spectrum modulation are performed on N channels of subcarriers to obtain N channels of modulated spread spectrum signals, and the N channels of modulated spread spectrum signals are combined;

[0121] Step 402: Perform photoelectric conversion and analog-digital conversion processing on the...

Embodiment 3

[0135] Based on the same inventive concept as the first embodiment of the present invention, the third embodiment of the present invention provides a signal transmission device. Specifically, as shown in 5, it is a schematic structural diagram of the signal transmission device described in the third embodiment of the present invention. . by Figure 5 It can be seen that the signal transmitting device may include a light source 51, a serial-to-parallel converter 52, a first splitting device 53, a first combining device 54, and N modulation and spreading devices 55, and the value of N is not less than 2. A positive integer, where:

[0136] The light source 51 can be used to generate a single-wavelength optical carrier and output it to the first branching device 53;

[0137] The serial-to-parallel converter 52 can be used to serial-parallel convert the received high-speed data signals into N channels of low-speed data signals, and output them to the N modulation and spread spectrum d...

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Abstract

A signal transmitting method, a signal receiving method, and related equipment and systems. For the generated single-wavelength optical carrier, it can be split into N subcarriers with the same wavelength through a splitting device, and the received high-speed data can be used to The N channels of low-speed data signals obtained by serial-to-parallel conversion of the signal, and the N channels of spreading codes perform corresponding data modulation and amplitude spread spectrum modulation on the N channels of subcarriers to obtain N channels of modulated spread spectrum signals, and then modulate the N channels of The spread spectrum signals are combined and output. Since there is no need to use a multi-carrier generating device with a relatively complex structure when performing optical carrier splitting, and when performing spread spectrum, there is no need to use a phase modulation method that requires multiple delay units or controllable phase units, thereby increasing the On the basis of system reliability, it solves the problems of high cost and difficult implementation in existing solutions for improving the reliability of QAM systems.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a signal transmission method, a signal reception method, and related equipment and systems. Background technique [0002] Due to transmission distortion, transmission loss, etc., baseband signals are usually not suitable for long-distance transmission on various channels. In order to enable long-distance transmission in various channels, it is necessary to carry out corresponding carrier modulation to move its signal spectrum to a high frequency, making it a form suitable for long-distance channel transmission. [0003] Specifically, at present, digital modulation methods such as QPSK (Quadrature Phase Shift Keying) and 16QAM (Quadrature Amplitude Modulation) can be used for carrier modulation. Moreover, with the successive commercialization of QPSK and 16QAM, as well as increasing transmission capacity requirements, signal modulation has begun to progress to higher-order QAM. Ho...

Claims

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Application Information

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IPC IPC(8): H04B10/50H04L27/34
CPCH04B10/50H04L27/34H04B10/5053H04B10/54H04J14/005H04B7/216H04B10/697H04B1/7087H04B10/2507H04B10/2569H04B10/5161H04B2201/709709H04L27/366
Inventor 黄远达李良川
Owner HUAWEI TECH CO LTD