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Multi-carrier multiplexing optical wireless link system and digital pre-distortion method thereof

A digital pre-distortion and wireless link technology, applied in the direction of optical multiplexing system, multiplexing communication, synchronization/start-stop system, etc., can solve the problem that the optical wireless link system cannot process a variety of different bandwidth signals at the same time Transmission and other issues to achieve the effect of reducing hardware equipment requirements and improving dynamic range

Inactive Publication Date: 2013-09-11
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: how to provide a multi-carrier multiplexing optical-carrying wireless link system and its digital pre-distortion method, so as to solve the problem that the existing optical-carrying wireless link system cannot simultaneously process the transmission of signals with different bandwidths

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  • Multi-carrier multiplexing optical wireless link system and digital pre-distortion method thereof
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  • Multi-carrier multiplexing optical wireless link system and digital pre-distortion method thereof

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Embodiment Construction

[0053] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

[0054] In order to solve the problem that the existing optical carrier wireless link system cannot handle multiple signal transmissions with different bandwidths at the same time. The present invention provides a multi-carrier multiplexing optical carrier wireless link system and its digital predistortion method. The system of the present invention includes:

[0055] A data processor for predistorting the input signal, a polarization controller for adjusting the optical carrier, an electro-optical modulator for loading the signal processed by the data processor onto the optical carrier, and a The output signal of the electro-optical modulator is processed and fed back to the feedback processo...

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Abstract

The invention discloses a multi-carrier multiplexing optical wireless link system and a digital pre-distortion method thereof. The multi-carrier multiplexing optical wireless link system comprises a data processor for conducting pre-distortion treatment on input signals, a polarization controller used for adjusting light carrier, an electrooptical modulator used for loading signals processed by the data processor to the light carrier, and a feedback processor used for processing output signals of the electrooptical modulator and feeding the output signals back to the data processor. The data processor and the polarization controller are respectively connected with the electrooptical modulator. The electrooptical modulator is connected with the feedback processor. The feedback processor is connected with the data processor. The multi-carrier multiplexing optical wireless link system improves the transmission quality of all the frequency components of frequency division multiplexing signals, restricts adjacent channel disturbance, improves the dynamic range of the transmission signals of the system, and can be used in radio frequency division multiplexing optical wireless systems of wide bands.

Description

technical field [0001] The present invention relates to the technical field of communication signal processing, in particular to a multi-carrier multiplexing optical carrier wireless link system and a digital predistortion method thereof. Background technique [0002] Wireless over optical technology combines the advantages of flexible access of wireless communication and high bandwidth, low cost, and low loss of optical fiber communication, and is widely regarded as the most attractive solution for future wireless access networks. The optical carrier wireless link can modulate any wireless signal onto the optical carrier, transmit it for a certain distance in the optical fiber, and then restore it to the original wireless signal through photoelectric conversion and directly transmit it into the wireless channel. The fiber link loss is extremely low, so the coverage of the transmitted wireless signal can be greatly extended. At the same time, compared with the macro base st...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/04H04L25/49H04J14/00
Inventor 李建强徐坤裴寅清戴一堂尹飞飞
Owner BEIJING UNIV OF POSTS & TELECOMM
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