Electrical absorption modulation laser device-based high frequency vector radiofrequency signal generation system and precoding method

Abstract

The invention belongs to the technical field of optical fiber communication and optical network transmission and specifically relates to an electrical absorption modulation laser device-based high frequency vector radiofrequency signal generation system and a precoding method. The system mainly consists of an integrated electrical absorption modulation laser device, an optical cross wavelength division multiplexer and a photoelectric detector. Precoding operation is performed based on different modulation formats, magnitude of offset voltage and driving signals of the electrical absorption modulation laser device is set, optical signals are modulated, the optical cross wavelength division multiplexer is adopted, detection operation is performed via the photoelectric detector, and finally optical vector radiofrequency signals that are robust for optical frequency noise and phase noise are finally stably generated. After the optical vector radiofrequency signals that are pre-coded are detected via the photoelectric detector, optical vector radiofrequency signals can still processed via an electric coherent reception and digital signal processing algorithm, transmission rates of a communication system and sensitivity of a receiver can be improved, and transmission performance can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of optical-borne wireless communication and optical signal transmission, and in particular relates to a radio frequency signal generation system and a precoding method based on an electroabsorption modulation laser. Background technique [0002] The application of high-speed access network, various data services of intelligent terminals, multimedia broadcasting system and many big data services poses a great challenge to high-speed data wireless communication. Radio-over-fiber and high-frequency high-order vector radio frequency signals have the characteristics of large bandwidth and low attenuation, making it possible for future high-speed wireless communications. [0003] figure 1 It is a block diagram of prior art 1: a block diagram of a traditional generation scheme of high-frequency vector radio frequency signals based on electrical frequency multiplication. Due to the high frequency band of high-freq...

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Problems solved by technology

[0006] In order to solve or avoid the above three problems, namely (1) to avoid the electronic bottleneck that is difficult to implement frequency doubling in the high frequency band; (2) to avoid the frequency noise and phase noise caused by different source photon-assisted technologies; (3) to reduce the The high cost introduced by the intensity modulator, the present invention proposes a low-cost, stable vector radio frequency signal generation system and precoding method based on electroabsorption modulation laser

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