Asymmetric double single sideband modulated polarization multiplexing photo-generated millimeter wave method and system

Abstract

The invention discloses a polarization multiplexing photo-generated millimeter wave method and a polarization multiplexing photo-generated millimeter wave system for asymmetric double single sideband modulation, and belongs to the technical field of communication. Two vector modulation signals and two unmodulated signals are simultaneously modulated on two optical carrier asymmetric sidebands at a transmitting end, and four vector modulation signals and four unmodulated signals can be generated by using a polarization multiplexing technology. At a receiving end, the signals are separated, and finally four independent millimeter waves with the same frequency are generated. According to the method, multiple paths of same-carrier-frequency millimeter wave signals suitable for MIMO can be generated at the same time, the technical problem that only one path of photo-generated millimeter wave signals and symmetrical sideband modulation sideband crosstalk can be generated in the prior art is solved, and power attenuation caused by dispersion does not exist; and digital compensation algorithms such as phase recovery, dispersion compensation and channel equalization are not needed, and additional digital signal processing is not needed at a receiver end.

Description

technical field [0001] The present invention belongs to the technical field of communication, and more specifically relates to a method and system for polarization-multiplexing optically-generated millimeter waves with asymmetric double-single-sideband modulation. Background technique [0002] There are two types of carrier frequencies used in 5G mobile communications: Sub-6G and millimeter wave. Among them, many frequency bands of Sub-6G have been occupied, and spectrum resources are limited. However, millimeter wave frequency bands have not been used on a large scale. Abundant spectrum resources can better meet the demand for large bandwidth of 5G communication. The traditional electrical way to generate millimeter wave signals is limited by the bandwidth of electronic devices, and the transmission distance of signals in atmospheric channels is also extremely limited. Optically generated millimeter waves can avoid these problems and are a promising solution. Massive mult...

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Problems solved by technology

[0004] Aiming at the defects and improvement needs of the prior art, the present invention provides a polarization-multiplexed optically-generated millimeter-wave method and system with asymmetric dual-single-sideband modulation, the purpose of which is to simultaneously generate multiple millimeter-waves with the same carrier frequency suitable for MIMO signal, thereby solving the technical problem that only one optically-generated millimeter-wave signal and symmetrical sideband modulation sideband crosstalk can be generated in the prior art

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