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Signal transmitting method, signal receiving method, related equipment and system

A signal transmission and signal technology, applied in the field of communication, can solve the problems of poor performance of high-order QAM and limited device bandwidth, etc.

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

[0006] Embodiments of the present invention provide a signal transmitting method, a signal receiving method, related equipment, and a system to solve the problem of poor performance of high-order QAM due to limited device bandwidth in the transmission system

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  • Signal transmitting method, signal receiving method, related equipment and system
  • Signal transmitting method, signal receiving method, related equipment and system
  • Signal transmitting method, signal receiving method, related equipment and system

Examples

Experimental program
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Embodiment 1

[0095]In order to solve the problem of poor high-order QAM performance in the prior art due to limited device bandwidth, Embodiment 1 of the present invention provides a signal transmission method. Specifically, see figure 1 , figure 1 The method flow chart of the signal transmission method provided by the embodiment of the present invention, the signal transmission method may specifically include the following steps:

[0096] Step S101, generating a single-wavelength optical carrier.

[0097] Step S102, splitting the single-wavelength optical carrier into N sub-carriers with the same wavelength.

[0098] Step S103, generating spreading codes corresponding to each channel of the subcarriers to obtain N channels of spreading codes.

[0099] Step S104, serial-parallel converting the data signal to be transmitted into N channels of sub-data signals.

[0100] Step S105: Modulate the N channels of sub-carriers according to the N channels of sub-data signals and the N channels of...

Embodiment 2

[0115] According to the description of Embodiment 1, it can be seen that the code pattern of the spreading code is set according to the preset rules, therefore, on the basis of meeting the preset rules, the code patterns of any two spreading codes may be the same or different, and when When the patterns of the two spreading codes are the same, their bit delays are different. In view of this, in order to save costs and simplify the structure of the signal transmitting device, in this embodiment, spreading codes with the same pattern can be generated by the same spreading code generator.

[0116] Specifically, when the spreading code pattern corresponding to the nth subcarrier is different from the spreading code pattern of the (n+1)th subcarrier, the mth spreading code generator can be used to generate the nth subcarrier corresponding spreading code, and use the (m+1)th spreading code generator to generate the spreading code corresponding to the (n+1)th subcarrier, that is, use...

Embodiment 3

[0126] Corresponding to the signal transmitting methods in Embodiment 1 and Embodiment 2, this embodiment proposes a signal receiving method, see figure 2 , figure 2 The method flowchart of the signal receiving method provided by the embodiment of the present invention, the signal receiving method includes the following steps:

[0127] Step S201, receiving a signal transmitted by a signal transmitting device.

[0128] Step S202, performing photoelectric conversion and analog-to-digital conversion processing on the received signal to obtain a digital signal.

[0129] Step S203, despread the digital signal based on the N-channel spreading codes to obtain N-channel despread signals.

[0130] Step S204, performing low-pass filtering on each of the N despread signals to obtain N data signals.

[0131] That is to say, the signal receiving device performs photoelectric conversion on the received signal through the photoelectric converter, and performs analog-to-digital conversio...

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Abstract

An embodiment of the present invention provides a signal transmitting method, a signal receiving method, related equipment, and a system, wherein the signal transmitting method includes: generating a single-wavelength optical carrier; splitting the single-wavelength optical carrier into N beams with the same wavelength Road subcarriers; generating spreading codes corresponding to each of the subcarriers to obtain N spreading codes; wherein, the bandwidth of each of the spreading codes is less than or equal to a preset threshold; the data signal to be transmitted is serially converted into N channels of sub-data signals; modulate the N channels of sub-carriers according to the N channels of sub-data signals and the N channels of spreading codes to obtain N channels of modulated signals; combine the N channels of modulated signals into one channel of combined signals for output. It can be seen that this solution can reduce the demand of each signal on ENOB, thereby effectively reducing the impact of the quantization noise of the DAC and the electrical noise of other electrical devices, and improving the performance of high-order QAM.

Description

technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular, to a signal transmitting method, a signal receiving method, related equipment and a system. Background technique [0002] In the process of signal transmission, usually the longer the transmission distance, the greater the transmission loss of the signal, and the frequency of the baseband signal sent by the transmitting end of the transmission system is low, and the spectrum starts from near zero frequency, so the baseband signal is not suitable for various long-distance transmission over the channel. In order to enable the baseband signal to be transmitted over a long distance, it needs to be modulated by a corresponding carrier to move its signal spectrum to a high frequency, so that it can be modulated into a form suitable for long-distance channel transmission. [0003] Specifically, at present, QAM (Quadrature Amplitude Modulation, Quadr...

Claims

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Application Information

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IPC IPC(8): H04J13/10H04B1/707H04L27/00H04L27/34
CPCH04B1/707H04J13/10H04L27/00H04J13/0003H04J14/02H04B1/69H04B7/0413H04B10/541H04B10/6161
Inventor 余毅黄远达李良川
Owner HUAWEI TECH CO LTD