Quadrature amplitude modulation (QAM) signal modulation and demodulation method and device

A technology of quadrature amplitude modulation and signal modulation, which is applied in modulation carrier system, error detection by signal space coding, forward error control, etc. It can solve the problems of poor applicability, low efficiency and high complexity, and achieve applicability Strong, efficient, and complexity-reduced effects

Active Publication Date: 2020-07-03
HISILICON OPTOELECTRONICS CO LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current DM encoding process is highly complex, and its mapping depth will increase sharply with the increase of the input data volume, which makes the modulation and demodulation process of the existing PS-QAM system highly complex and efficient. low, poor applicability

Method used

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  • Quadrature amplitude modulation (QAM) signal modulation and demodulation method and device
  • Quadrature amplitude modulation (QAM) signal modulation and demodulation method and device
  • Quadrature amplitude modulation (QAM) signal modulation and demodulation method and device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0049] See figure 2 , figure 2 It is a schematic flow chart of a QAM signal modulation method provided by an embodiment of the present invention. This method can be executed by a network device with a QAM signal modulation function such as an optical transceiver. For the convenience of understanding and description, in this embodiment, the network device is used as the execution subject. describe. In this example, the modulated figure 1 Taking the QAM signal corresponding to one or more constellation points in the first quadrant as an example, the entire QAM signal modulation method is described. The method includes the steps of:

[0050] S101. Perform distribution matching DM coding on N1 first bits to obtain N2 first symbols.

[0051] In some feasible implementation manners, the network device may perform DM encoding on the N1 first bits, and encode the N1 first bits into N2 first symbols. Here, the signal power corresponding to the above-mentioned N2 first symbols in...

Embodiment 2

[0074] Please also see image 3 , image 3 It is a QAM signal demodulation method provided by the embodiment of the present invention, the QAM signal demodulation method corresponds to the QAM signal modulation method described in Embodiment 1, and is used to modulate one or more QAM signal modulation methods obtained by the above QAM signal demodulation method A QAM signal is demodulated to obtain a plurality of first bits or second bits. The method can be executed by a network device with a QAM signal demodulation function such as an optical transceiver. For the convenience of understanding and description, the network device is used as the execution subject for description in this embodiment. . Above-mentioned QAM signal demodulation method comprises steps:

[0075] S201. Perform QAM demapping on N2 QAM signals to obtain N9 QAM demapping bits.

[0076] In some feasible implementation manners, after acquiring the N2 QAM signals, the network device demaps the N2 QAM signa...

Embodiment 3

[0093] See Figure 4 , Figure 4 It is a schematic structural diagram of a QAM signal modulation device provided by an embodiment of the present invention. The above-mentioned QAM signal modulation device includes:

[0094] The DM encoding unit 101 is configured to perform distribution matching DM encoding on N1 first bits to obtain N2 first symbols. Here, the signal power corresponding to the N2 first symbols includes at least the first power and the second power.

[0095] A phase modulation unit 102, configured to determine the N4 symbols to be phase-modulated whose signal power is a preset signal power from the N2 first symbols obtained by the DM encoding unit 101, and based on the N3 second bit pairs. Perform phase modulation on the N4 symbols to be phase-modulated to obtain N4 second symbols. Here, the preset signal power is part or all of the signal power corresponding to the N2 first symbols.

[0096] A BL encoding unit 103, configured to perform the N4 second symb...

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Abstract

The embodiment of the invention discloses a quadrature amplitude modulation QAM signal modulation method. The modulation method comprises the following steps: performing DM coding on N1 first bits toobtain N2 first symbols; and determining N4 to-be-modulated coincidence signals of which the signal power is the preset signal power from the N2 first symbols, and performing phase modulation on the N4 to-be-modulated coincidence signals based on the N3 second bits to obtain N4 second symbols; performing BL encoding on the N4 second symbols and the N2-N4 first symbols to obtain N5 BL encoding output bits; performing FEC encoding on the N5 BL encoding output bits to obtain N6 FEC redundant bits; performing QAM mapping based on the N6 FEC redundant bits and the N5 BL coding output bits to obtainN2 target QAM signals. By adopting the embodiment of the invention, the complexity of DM coding can be reduced, and the efficiency and applicability of the QAM signal modulation and demodulation method based on probability shaping are improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a quadrature amplitude modulation QAM signal modulation and demodulation method and device. Background technique [0002] With the increasing service demands of the mobile Internet and the Internet of Things, emerging services such as ultra-clear video and virtual reality (virtual reality, VR) have also achieved considerable development. What follows is that people's demand for the capacity of the transmission network becomes larger and larger, which makes how to realize a higher rate modulation and demodulation technology to improve the network transmission capacity has become a current research hotspot. [0003] In the prior art, with the development of modulation and demodulation technology, a quadrature amplitude modulation (QAM) system (hereinafter referred to as PS-QAM system) based on probabilistic shaping (PS) has been proposed. Compared with the traditional QAM system, the spe...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L27/36H04L27/38
CPCH04L27/36H04L27/38H04L1/004H04L1/0042H04L1/0047H04L1/0058H04L27/3405H03M13/25H04L1/0041
Inventor黄远达肖可鑫夏斌
OwnerHISILICON OPTOELECTRONICS CO LIMITED