Fiber wireless communication system and method for generating downlink multi-service millimeter wave

Abstract

The invention relates to a fiber wireless communication system and a method for generating downlink multi-service millimeter wave. The system comprises a central station and a base station. The central station comprises a light source, a first modulation module and a second modulation module, wherein the light source is used for generating optical signals of single wavelength; the first modulationmodule uses a radio-frequency signal to carry out optical carrier suppression modulation for the optical signals to generate two optical carrier signals; and the second modulation module uses a radio-frequency signal and an intermediate-frequency signal carried with data information to carry out optical single-sideband carrier suppression modulation for the two optical carrier signals to generatea radio-frequency optical output signal. The base station is connected with the central station through a fiber, and comprises a filter module and a photoelectric conversion module, wherein the filter module filters unneeded middle components in the radio-frequency optical output signal; and the photoelectric conversion module carries out photoelectric conversion for the optical signal output bythe filter module to output the multi-service millimeter wave. The system and the method have the advantages of simple structure, reliable performance and low cost.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an optical fiber wireless communication system and a downlink multi-service millimeter wave generation method thereof. Background technique [0002] In today's information society, wireless communication has become one of the most widely used, largest and fastest growing fields. The development trend of wireless communication systems to provide broadband multi-service services including voice, image, multimedia, etc., makes the system necessarily require higher data transmission capacity. Due to its limited operating bandwidth and frequency reuse rate, the existing wireless cellular system is far from meeting the requirements of "high speed, large capacity, and seamless coverage" for wireless access methods in the future. Therefore, there is an increasingly urgent need to extend broadband wireless signals and carrier frequencies to high-frequency millimeter wave bands (such ...

AI Technical Summary

Problems solved by technology

This method requires high-frequency millimeter-wave sources, millimeter-wave mixers, electro-optic modulators in the millimeter-wave band, and other devices, which are expensive, especially for generating multiple millimeter-wave signals.

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