2x2 MIMO (Multiple Input Multiple Output) radio-over-fiber fusion method and system based on optical independent sideband modulation of I/Q (In-phase/Quadrature-phase) modulator

A technology of independent sideband and fusion method, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve problems such as increasing the complexity of the system architecture, and achieve the effect of avoiding the use of optical polarization diversity and increasing flexibility.

Active Publication Date: 2016-11-09
FUDAN UNIV
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Problems solved by technology

However, in order to be able to simultaneously generate multiple wireless millimeter-wave signals for wireless MIMO transmission, existing MIMO-type fiber-optic wireless fusion systems usually need to adopt optical polarization multiplexing and optical polarization diversity, which greatly increases the complexity of the system architecture. X. Li, Z. Dong, J.

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  • 2x2 MIMO (Multiple Input Multiple Output) radio-over-fiber fusion method and system based on optical independent sideband modulation of I/Q (In-phase/Quadrature-phase) modulator

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing, the present invention is described in detail.

[0037] figure 1 It is a schematic diagram of a 2×2 MIMO fiber-to-wireless fusion system using optical ISB modulation based on an I / Q modulator, which includes:

[0038] Two digital baseband vector signal generation modules 1 and 2 are used to generate two independent digital baseband vector signals s1 and s2 . The two digital baseband vector signals can have the same or different baud rates and the same or different vector modulation formats, including QPSK, 8QAM, 16QAM, 64QAM, etc. Subsequently, the digital baseband vector signal s1 via digital multiplier 5 with positive frequency f s1 The digital complex sinusoidal RF source is multiplied by 3, thus being up-converted into a carrier frequency of f s1 The upper sideband digital vector signal; the digital baseband vector signal s2 via digital multiplier 6 with negative frequency- f s2 The digital complex sinusoidal...

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Abstract

The invention belongs to the technical field of radio-over-fiber communication systems, in particular to a 2x2 MIMO (Multiple Input Multiple Output) radio-over-fiber fusion method and system based on optical independent sideband (ISB) modulation of an I/Q (In-phase/Quadrature-phase) modulator. In the 2x2 MIMO radio-over-fiber fusion system, two paths of independent vector millimeter wave signals are generated at the same time through the optical ISB modulation based on the I/Q modulator. The use of optical polarization multiplexing and optical polarization diversity is avoided, so that a system framework is simplified greatly, and the system stability is enhanced. The system is suitable for MIMO type radio-over-fiber communications of different modulation formats, different Baud rates and different carrier frequency reuses.

Description

technical field [0001] The invention belongs to the technical field of optical wireless communication systems, and in particular relates to a 2×2 MIMO optical fiber wireless fusion method and system using optical independent sideband modulation based on an I / Q modulator. Background technique [0002] Radio-over-Fiber (RoF for short) fusion system integrates high-capacity long-distance optical fiber communication and high-mobility wireless communication, and is expected to provide large-capacity long-distance wireless transmission links for mobile data communications. Among the many optical fiber wireless fusion systems reported in the scientific research community recently, the wireless multiple-input multiple output (MIMO) technology is used to increase the wireless transmission capacity to match the large optical fiber transmission capacity [X. Li, Z. Dong, J. Yu, N. Chi, Y. Shao, and G. K. Chang, “Fiber wirelesstransmission system of 108-Gb / s data over 80-km fiber and 2×2...

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Application Information

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IPC IPC(8): H04B10/516
CPCH04B10/5161
Inventor 李欣颖余建军肖江南
Owner FUDAN UNIV
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