Method and system for generating multi-frequency millimeter wave and applying same to multi-base station ROF communication system

Abstract

The invention discloses a method and a system for generating multi-frequency millimeter wave and applying the same to a multi-base station ROF (radio over fiber) communication system. The method comprises the following steps of: generating double sideband modulation in a central station by adopting a modulator and a radio-frequency source, coupling the double sideband modulation and one of carriers of different frequencies transmitted by a plurality of laser devices to a fiber channel, transmitting the double sideband modulation and the carrier to a base station, decomposing the carriers of two frequencies in the base station through a WDM (wavelength division multiplexer), generating four-wave hybrid frequency through a semiconductor optical amplifier, finally generating beat frequency by a detector to acquire millimeter wave, and transmitting the millimeter wave by an antenna. Antenna received data are modulated onto the carriers of different frequencies on an uplink and then transmitted to the central station, and the data are received by a receiver of the central station. The invention provides an effective path for generation and application of the millimeter wave in the multi-base station ROF system.

Description

technical field

[0001] The invention belongs to the technical field of optical fiber wireless communication, and particularly relates to the generation of millimeter waves and the optical fiber wireless access technology of microwave over optical (ROF). Background technique

[0002] In recent years, Internet services based on Internet Protocol (IP), such as distance education, video-on-demand and high-definition TV, have continued to grow, not only putting forward higher and higher requirements for the bandwidth capacity of existing networks, but also The flexibility of network networking puts forward new requirements, especially for broadband flexible access network technology. Therefore, the broadband access technology of optical fiber and wireless integration will be one of the preferred solutions for future access networks. Radio over Fiber (ROF, Radio over Fiber) system is the main technology of optical fiber wireless convergence, which is mainly composed of four parts:...

Examples

Embodiment Construction

[0027] The millimeter wave generation of the ROF system of the present invention and the method and system for its application in the multi-base station ROF system will be further described in detail below with reference to the specific embodiments.

[0028] figure 1 The block diagram of mmWave generation and ROF system based on SOA and WDM demultiplexer is described, which mainly consists of two lasers, two MZM modulators, EDFA, transmission fiber, SOA, WDM demultiplexer, detector, transmit / receive Antenna, optical / electrical conversion and receiver composition. The ROF millimeter wave generation and the specific implementation steps of the ROF system in the present invention are as follows: in the CS of the ROF, the output frequency of the laser a is f. a The optical signal is input to the MZM modulator, which modulates the data to a frequency of f a on the carrier wave, and then with the output frequency of laser b at f b One of the optical signals is coupled to the Fibr...

technical field

[0001] The invention belongs to the technical field of optical fiber wireless communication, and particularly relates to the generation of millimeter waves and the optical fiber wireless access technology of microwave over optical (ROF). Background technique

[0002] In recent years, Internet services based on Internet Protocol (IP), such as distance education, video-on-demand and high-definition TV, have continued to grow, not only putting forward higher and higher requirements for the bandwidth capacity of existing networks, but also The flexibility of network networking puts forward new requirements, especially for broadband flexible access network technology. Therefore, the broadband access technology of optical fiber and wireless integration will be one of the preferred solutions for future access networks. Radio over Fiber (ROF, Radio over Fiber) system is the main technology of optical fiber wireless convergence, which is mainly composed of four parts:...

Examples

Embodiment Construction

[0027] The millimeter wave generation of the ROF system of the present invention and the method and system for its application in the multi-base station ROF system will be further described in detail below with reference to the specific embodiments.

[0028] figure 1 The block diagram of mmWave generation and ROF system based on SOA and WDM demultiplexer is described, which mainly consists of two lasers, two MZM modulators, EDFA, transmission fiber, SOA, WDM demultiplexer, detector, transmit / receive Antenna, optical / electrical conversion and receiver composition. The ROF millimeter wave generation and the specific implementation steps of the ROF system in the present invention are as follows: in the CS of the ROF, the output frequency of the laser a is f. a The optical signal is input to the MZM modulator, which modulates the data to a frequency of f a on the carrier wave, and then with the output frequency of laser b at f b One of the optical signals is coupled to the Fibr...

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