A modulator, modulation system and method for realizing high-order modulation

Abstract

The embodiment of the present invention discloses a modulator, including: a first modulation module, used to receive the first data to be modulated, and output a first transmission curve according to the first data to be modulated; a second modulation module, used to receive the second Data to be modulated, and output a second transmission curve according to the second data to be modulated, wherein the period of the second transmission curve is half of the period of the first transmission curve; the synthesis module is used to combine the first transmission curve with the first transmission curve The phase superposition of the two transmission curves is performed to obtain a synthesized linear result. In addition, this solution also provides a modulation system and a method for realizing high-order modulation, which can obtain a modulable linear result by controlling the superposition ratio between transmission curves, thereby realizing the transmission of linear curves, which is suitable for various modulation scenarios, Enhance program flexibility.

Description

technical field [0001] The invention relates to signal modulation in the communication field, in particular to a modulator, a modulation system and a method for realizing high-order modulation. Background technique [0002] Mobile communication network news With the rapid development of data communication and Internet, network point-to-point, online applications and video services have shown explosive growth. Massive digital media content has triggered a rapid increase of ten times or even a hundred times in Internet traffic. At present, the system with a transmission speed of 100,000 megabits per second (100Gbps) has been commercialized by major operators. The 400G system can further increase the network capacity and reduce the transmission cost per bit on the basis of 100G, effectively solving the business traffic faced by operators. And the pressure of continuous growth of network bandwidth. [0003] The quadrature phase shift keying (English full name: quadrature phase ...

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Problems solved by technology

[0004] The OSNR limitation, noise and nonlinearity brought by the 400G system will limit the transmission distance. From the current mainstream equipment, dual carrier and quadrature amplitude modulation (English full name: quadrature amplitude modulation, English abbreviation: 16QAM) modulation technology are used. The transmission distance of the current 400G system is only about 1 / 3 of that of the 100G system, so the construction of a high-speed system needs to comprehensively consider the system capacity and transmission distance requirements

[0006] However, since the modulation curve is a sinusoidal curve, when used for high-order modulation such as 16QAM, a digital-to-analog converter (English full name: digital to analog converter, English abbreviation: DAC) is required for nonlinear compensation, which will increase the number Signal processor (English full name: digital signal processor, English abbreviation: DSP) compensation power consumption and chip size, especially in the case of high-order modulation, the required compensation power consumption and chip size will be larger

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