CN103840885A - High carrier frequency and high speed light millimeter wave generating and long-span transmission system - Google Patents
High carrier frequency and high speed light millimeter wave generating and long-span transmission system Download PDFInfo
- Publication number
- CN103840885A CN103840885A CN201410077500.5A CN201410077500A CN103840885A CN 103840885 A CN103840885 A CN 103840885A CN 201410077500 A CN201410077500 A CN 201410077500A CN 103840885 A CN103840885 A CN 103840885A
- Authority
- CN
- China
- Prior art keywords
- optical
- millimeter wave
- carrier frequency
- laser
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Lasers (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a high carrier frequency and high speed light millimeter wave generating and long-span transmission system, wherein the high carrier frequency is 40 GHz, the data speed is 10 Gbit/s, and the relay-free long span is 84.7 km. NRZ electrical data signals of 10 Gbit/s are amplified through an SHF803P and then enter a 40G intensity modulator, ninety percent of DFB lasers simultaneously enter the modulator through a polarization controller, and the laser is subjected to intensity modulation by electrical data to generate high-speed modulated light. Ninety percent of a spectrum is amplified by an erbium-doped optical fiber amplifier and is filtered by XTM50 to obtain a 40 GHz multiplicity clock spectrum, and the clock spectrum and ten percent of the high-speed modulated light are subjected to adjustment range by a VOA and then combined to obtain high-speed light millimeter waves. The light millimeter waves are amplified through a KPS fiber optic amplifier and then enter a dispersion flattened fiber set to be transmitted, and the electrical millimeter waves are formed after beat frequency in a remote base station. The method can be used for extension research of high bit rate light millimeter wave systems with the carrier frequency being 20 GHz, 30 GHz and 50 GHz, and can be used for the fields such as microwave photonics.
Description
Affiliated technical field
The present invention relates to a kind of high carrier frequency high rate optical millimeter wave and produce and long span transmission system, can be applicable to the fields such as Microwave photonics, optical fiber communication, wireless optical fiber access.
Background technology
In recent years, the miscellaneous services such as large data, mobile traffic, broadband streaming media constantly increase severely, and High rate and large capacity wireless communication needs increases day by day.In order to realize wireless broadband communication, improve its operating frequency, the optical millimeter wave communication technology Radio-over-Fiber (RoF) that Fibre Optical Communication Technology and high frequency wireless access are merged should need and give birth to.At present, optical millimeter wave generation, transmission and reception technique have become the study hotspot of realizing ultra broadband access as a kind of emerging communication technology growing up.
In view of optical millimeter wave system is to device performance parameter, Fiber-optic parameter etc. require harsh, optical millimeter wave produces in experimental technique at present, mostly adopt data compared with low rate, the short situation of transmission single spanning distance, as NRZ optical millimeter wave signal 60GHz, 2.5Gbit/s, 50km[1Hongjun Zheng, Shanliang Liu, Xin Li, Weitao Wang, Zhen Tian.Generation and transmission simulation of60G millimeter-wave by using semiconductor optical amplifiers for radio-over-fiber systems.Optics Communications.282 (22): 4440-4444 (2009)], OFDM form optical millimeter wave signal 19GHz, 4Gbps, 50km[2C.Lin, Y.Lin, J. (J.) Chen, S.Dai, P.T.Shih, P.Peng, and S.Chi, " Optical direct-detection OFDM signal generation for radio-over-fiber link using frequency doubling scheme with carrier suppression, " Opt.Express16, 6056-6063 (2008)], OOK optical millimeter wave 60GHz and 56GHz, 1Gbps, 50km[3Liang Zhang, Ming Zhu, Chenhui Ye, Shu-Hao Fan, Cheng Liu, Xiaofeng Hu, Pan Cao, Qingjiang Chang, Yikai Su, and Gee-Kung Chang, " Generation and transmission of multiband and multi-gigabit60-GHz MMW signals in an RoF system with frequency quintupling technique, " Opt.Express21, 9899-9905 (2013)], OFDM optical millimeter wave 60GHz, 4.65Gbps × 8channels, 40km[4Li Tao, Jianjun Yu, Qi Yang, Yufeng Shao, Junwen Zhang, and Nan Chi, " A novel transform domain processing based channel estimation method for OFDM radio-over-fiber systems, " Opt.Express21, 7478-7487 (2013)].But China is vast in territory, populous, information communication demand rapid growth, high bit rate optical millimeter wave produces with the demand of long span transmission and becomes day by day urgent.
Content of the patent
In the day by day urgent situation of optical millimeter wave two-forty, long span demand, the present invention proposes a kind of high carrier frequency high rate optical millimeter wave and produce and long span transmission system, system high carrier frequency 40GHz, data high-speed rate 10Gbit/s, long span 84.7km; Adjustment System parameter, carrier frequency can be extended to 20GHz, 30GHz, 50GHz.
The technical solution adopted for the present invention to solve the technical problems is:
For 40GHz, 10Gbit/s high rate optical millimeter-wave systems, the present invention proposes a kind of high carrier frequency high rate optical millimeter wave and produce and long span transmission system, intend the technical scheme adopting: the 10Gbit/s two-forty NRZ pseudo-random pulse sequence electrical data signal number that Agilent 43Gbit/s Error Detector 81250 is exported is amplified into 40G high-speed wideband intensity modulator MOD via broadband electric amplifier SHF803P; The laser that narrow linewidth Distributed Feedback Laser produces is after 10:90 splitter OC1 shunt, and wherein 10% laser can be used for producing long-range trimmed book vibration source, does not discuss herein; Wherein 90% laser enters 40G high-speed wideband intensity modulator MOD through optical polarization controller PC simultaneously; Narrow-linewidth laser is produced two-forty wide-band modulation light by electric intensity data modulation, here the two-forty wide-band modulation light producing can be that this system produces optical millimeter wave and long-range light generation source simultaneously as the part of descending optical millimeter wave signal along separate routes, but only discuss the optical millimeter wave situation that produces here; Two-forty wide-band modulation light by 10:90 splitter OC2 along separate routes after, wherein 90% light wave is amplified into optical filter XTM50 through erbium-doped optical fiber amplifier EDFA 1, after filtering, obtain many times of clock spectrum of 40GHz, 10% the laser spectroscopy that this clock spectrum and splitter OC2 separate obtains high rate optical millimeter wave after being adjusted by adjustable optical attenuator VOA behind 50:50 mixer OC3He road; Optical millimeter wave is amplified into nearly Dispersion Flattened Fiber group Fiber transmission, single spanning distance Transmission Fibers group length 84.7km (being connected to form by G655 optical fiber 8.47km and Dispersion Flattened Fiber 76.23km) through KPS erbium-doped fiber amplifier; Optical millimeter wave forms electric millimeter-wave signal after arriving remote base stations beat frequency.Adopt spectrometer AQ6319, oscilloscope DSA8300 to carry out measure spectrum, eye pattern information in the access of light path link wire jumper.
The invention has the beneficial effects as follows:
In 40GHz, 10Gbit/s high rate optical millimeter-wave systems, the present invention proposes a kind of high carrier frequency high rate optical millimeter wave and produce and long span transmission system; Adopt same DFB LASER Light Source to produce high rate optical millimeter wave and long-range trimmed book vibration source simultaneously, can effectively suppress phase noise; The laser adopting has the performance such as narrow linewidth, high side mode suppression ratio, effectively inhibition strength noise; Adopt 10Gbit/s high data rate to go intensity modulated DFB laser can improve data rate by a broadband intensity modulator.Adopt the nearly Dispersion Flattened Fiber group of G655 and Dispersion Flattened Fiber composition to transmit, can effectively improve signal input power and reduce full span dispersion, improve transmission performance; With adopt radio frequency and baseband signal respectively phase modulation and intensity two kinds produce optical millimeter wave methods and compare, the present invention can produce high rate optical millimeter wave and long-range trimmed book vibration source simultaneously, optical millimeter wave produces and transmission plan novelty, span are long.This patent method and apparatus can be used as the important references of exploratory development high bit rate optical millimeter wave system, can be applicable to the field such as Microwave photonics, optical fiber communication.
Brief description of the drawings
Fig. 1 is that a kind of high carrier frequency high rate optical millimeter wave produces and long span transmission system installation drawing.The 1st, Agilent 43Gbit/s Error Detector 81250, the 2nd, broadband electric amplifier SHF803P, the 3rd, 40G high-speed wideband intensity modulator MOD, the 4th, narrow linewidth Distributed Feedback Laser, the 5th, 10:90 splitter OC1, the 6th, optical polarization controller PC, the 7th, be 10:90 splitter OC2, the 8th, erbium-doped optical fiber amplifier EDFA 1,9th, optical filter XTM50, the 10th, adjustable optical attenuator VOA, the 11st, 50:50 mixer OC3, the 12nd, KPS erbium-doped fiber amplifier, the 13rd, nearly Dispersion Flattened Fiber group Fiber, the 14th, spectrometer AQ6319, the 15th, oscilloscope DSA8300.
Fig. 2 is two-forty wide-band modulation spectrum (a) and the eye pattern (b) thereof obtaining.
Fig. 3 is (KPS pumping current I after KPS erbium-doped fiber amplifier amplifies
p=0.4A) optical millimeter wave.
Fig. 4 is the eye pattern of two-forty wide-band modulation light after nearly dispersion flattene Optical Fiber Transmission 84.7km, and Fig. 4 (a) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A), Fig. 4 (b) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.6A).
Fig. 5 is the spectrum of optical millimeter wave after nearly dispersion flattene Optical Fiber Transmission 84.7km, is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A)
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described with enforcement.
Shown in Fig. 1, the 10Gbit/s two-forty NRZ pseudo-random pulse sequence electrical data signal number of Agilent 43Gbit/s Error Detector 81250 (1) outputs is amplified into 40G high-speed wideband intensity modulator MOD (3) via broadband electric amplifier SHF803P (2); The laser that narrow linewidth Distributed Feedback Laser (4) produces is after 10:90 splitter OC1 (5) shunt, and wherein 10% laser can be used for producing long-range trimmed book vibration source, does not discuss herein; Wherein 90% laser enters 40G high-speed wideband intensity modulator MOD through optical polarization controller PC (6) simultaneously; Narrow-linewidth laser is produced two-forty wide-band modulation light by electric intensity data modulation, here the two-forty wide-band modulation light producing can be that this system produces optical millimeter wave and long-range light generation source simultaneously as the part of descending optical millimeter wave signal along separate routes, but only discuss the optical millimeter wave situation that produces here; Two-forty wide-band modulation light by 10:90 splitter OC2 (7) along separate routes after, wherein 90% light wave is amplified into optical filter XTM50 (9) through erbium-doped optical fiber amplifier EDFA 1 (8), after filtering, obtain many times of clock spectrum of 40GHz, 10% the laser spectroscopy that this clock spectrum and splitter OC2 separate obtains high rate optical millimeter wave after being adjusted by adjustable optical attenuator VOA (10) after 50:50 mixer OC3 (11) closes road; Optical millimeter wave is amplified into nearly Dispersion Flattened Fiber group Fiber (13) transmission, single spanning distance Transmission Fibers group length 84.7km (being connected to form by G655 optical fiber 8.47km and Dispersion Flattened Fiber 76.23km) through KPS erbium-doped fiber amplifier (12); Optical millimeter wave arrives the electric millimeter-wave signal forming after remote base stations beat frequency.Finally, adopt spectrometer AQ6319 (14) to carry out spectral detection analyzing and processing to signal transmission characteristics.The optical patchcord of connection spectrometer AQ6319 input port can directly be received oscilloscope DSA8300 (15) after pulling up and go to measure the characteristics such as eye pattern.Other light path links also can wire jumper access be carried out measure spectrum, eye pattern information.
Fig. 2 is two-forty wide-band modulation spectrum (a) and the eye pattern (b) thereof obtaining.What dotted ellipse indicated in Fig. 2 (a) is the clock spectrum of 40GHz, to its amplification, filtering and close the processing such as ripple with main ripple and can obtain optical millimeter wave; Fig. 2 (b) is visible, and eye pattern is clear, eyelid is thin, opening width is good.
Fig. 3 is (KPS pumping current I after KPS erbium-doped fiber amplifier amplifies
p=0.4A) optical millimeter wave.Visible, optical millimeter wave spectrum is clear, and data center's spectrum and clock spectrum interval are stabilized in 40GHZ (0.319nm), after two spectrum beat frequencies, is electric millimeter wave, carrier frequency 40GHz, data rate 10Gbps; Two spectrum peak value differences are 3.9dBm; Can be by regulating the passband centre wavelength of filter XTM50, two spectrum intervals can be extended to 20GHz, 30GHz, 50GHz; The adjusting that regulates erbium-doped optical fiber amplifier EDFA 1, filter XTM50 bandwidth, adjustable attenuator can realize two spectrum peaks changes.
Fig. 4 is the eye pattern of two-forty wide-band modulation light after nearly dispersion flattene Optical Fiber Transmission 84.7km, and Fig. 4 (a) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A), Fig. 4 (b) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.6A).Fig. 4 (a) is visible, the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A) time, the eye pattern after transmission is better, but poorer than eye pattern before transmission, and eyelid thickening, shake become large; Fig. 4 (b) is visible, and Fig. 4 (b) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.6A) under, eye pattern and I after transmission
prelatively, eyelid is thicker, eye opening is irregular for Fig. 4 (a) of=0.4A situation.This shows, is not that KPS erbium-doped fiber amplifier pumping current is the bigger the better, and is not that power is the bigger the better.
Fig. 5 is the spectrum of optical millimeter wave after nearly dispersion flattene Optical Fiber Transmission 84.7km, is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A), visible, due to the loss of long span optical fiber, after transmission, spectrum is slightly poorer than the spectrum (Fig. 3) before transmitting, optical power down; But still can keep good definition.
Claims (1)
1. high carrier frequency high rate optical millimeter wave produces and a long span transmission system, it is characterized in that: the 10Gbit/s two-forty NRZ pseudo-random pulse sequence electrical data signal number of Agilent Error Detector 81250 (1) outputs is amplified into 40G high-speed wideband intensity modulator MOD (3) via broadband electric amplifier SHF803P (2); The laser that narrow linewidth Distributed Feedback Laser (4) produces is after 10:90 splitter OC1 (5) shunt, and wherein 10% laser can be used for producing long-range trimmed book vibration source, does not discuss herein; Wherein 90% laser enters 40G high-speed wideband intensity modulator MOD through optical polarization controller PC (6) simultaneously; Narrow-linewidth laser is produced two-forty wide-band modulation light by electric intensity data modulation, two-forty wide-band modulation light by 10:90 splitter OC2 (7) along separate routes after, wherein 90% light wave is amplified into optical filter XTM50 (9) through erbium-doped optical fiber amplifier EDFA 1 (8), after filtering, obtain many times of clock spectrum of 40GHz, 10% the laser spectroscopy that this clock spectrum and splitter OC2 separate obtains high rate optical millimeter wave after being adjusted by adjustable optical attenuator VOA (10) after 50:50 mixer OC3 (11) closes road; Optical millimeter wave is amplified into nearly Dispersion Flattened Fiber group Fiber (13) transmission through KPS erbium-doped fiber amplifier (12), single spanning distance Transmission Fibers group length 84.7km, wherein optical fiber group is connected to form by G655 optical fiber 8.47km and Dispersion Flattened Fiber 76.23km; Optical millimeter wave arrives the electric millimeter-wave signal forming after remote base stations beat frequency; Adopt spectrometer AQ6319 (14) to carry out spectral detection analyzing and processing to signal transmission characteristics; The optical patchcord of connection spectrometer AQ6319 input port can directly be received oscilloscope DSA8300 (15) after pulling up and go to measure the characteristics such as eye pattern; Other light path links also can wire jumper access be carried out measure spectrum, eye pattern information; Can expand the high bit rate optical millimeter wave system of research carrier frequency 20GHz, 30GHz, 50GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410077500.5A CN103840885B (en) | 2014-02-27 | 2014-02-27 | High carrier frequency and high speed light millimeter wave generating and long-span transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410077500.5A CN103840885B (en) | 2014-02-27 | 2014-02-27 | High carrier frequency and high speed light millimeter wave generating and long-span transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103840885A true CN103840885A (en) | 2014-06-04 |
| CN103840885B CN103840885B (en) | 2017-02-08 |
Family
ID=50804072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410077500.5A Active CN103840885B (en) | 2014-02-27 | 2014-02-27 | High carrier frequency and high speed light millimeter wave generating and long-span transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103840885B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429979A (en) * | 2019-06-21 | 2019-11-08 | 南方科技大学 | Data transmission method, device, equipment and storage medium |
| CN112217572A (en) * | 2020-10-13 | 2021-01-12 | 聊城大学 | Multi-carrier generation system based on two-stage modulation |
| CN112217566A (en) * | 2020-10-22 | 2021-01-12 | 聊城大学 | Remote high-frequency microwave oscillation source system based on single-stage nonlinear spectrum expansion |
| CN112272059A (en) * | 2020-10-29 | 2021-01-26 | 聊城大学 | Remote high-frequency microwave oscillation source system based on two-stage nonlinear spectrum expansion |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080298461A1 (en) * | 2007-06-04 | 2008-12-04 | Samsung Electronics Co., Ltd. | Video signal processing apparatus, display apparatus and video signal processing method |
| CN103095377A (en) * | 2012-12-21 | 2013-05-08 | 聊城大学 | New method and device for generating high speed light millimeter waves of 40GHz and 10Gbit/s |
| CN103475416A (en) * | 2012-06-06 | 2013-12-25 | 中国联合网络通信集团有限公司 | Central station, and method and system for downlink signal processing based on millimeter wave communication |
| CN103490817A (en) * | 2013-09-30 | 2014-01-01 | 中国人民解放军理工大学 | Photonic generation device for high-frequency microwaves and millimeter waves and feeding method |
-
2014
- 2014-02-27 CN CN201410077500.5A patent/CN103840885B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080298461A1 (en) * | 2007-06-04 | 2008-12-04 | Samsung Electronics Co., Ltd. | Video signal processing apparatus, display apparatus and video signal processing method |
| CN103475416A (en) * | 2012-06-06 | 2013-12-25 | 中国联合网络通信集团有限公司 | Central station, and method and system for downlink signal processing based on millimeter wave communication |
| CN103095377A (en) * | 2012-12-21 | 2013-05-08 | 聊城大学 | New method and device for generating high speed light millimeter waves of 40GHz and 10Gbit/s |
| CN103490817A (en) * | 2013-09-30 | 2014-01-01 | 中国人民解放军理工大学 | Photonic generation device for high-frequency microwaves and millimeter waves and feeding method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429979A (en) * | 2019-06-21 | 2019-11-08 | 南方科技大学 | Data transmission method, device, equipment and storage medium |
| CN110429979B (en) * | 2019-06-21 | 2021-08-10 | 南方科技大学 | Data transmission method, device, equipment and storage medium |
| CN112217572A (en) * | 2020-10-13 | 2021-01-12 | 聊城大学 | Multi-carrier generation system based on two-stage modulation |
| CN112217572B (en) * | 2020-10-13 | 2023-09-12 | 聊城大学 | Multi-carrier generating system based on two-stage modulation |
| CN112217566A (en) * | 2020-10-22 | 2021-01-12 | 聊城大学 | Remote high-frequency microwave oscillation source system based on single-stage nonlinear spectrum expansion |
| CN112217566B (en) * | 2020-10-22 | 2023-09-08 | 聊城大学 | Remote high-frequency microwave oscillation source system based on single-stage nonlinear spectrum expansion |
| CN112272059A (en) * | 2020-10-29 | 2021-01-26 | 聊城大学 | Remote high-frequency microwave oscillation source system based on two-stage nonlinear spectrum expansion |
| CN112272059B (en) * | 2020-10-29 | 2023-09-29 | 聊城大学 | Remote high-frequency microwave oscillation source system based on two-stage nonlinear spread spectrum |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103840885B (en) | 2017-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Smolorz et al. | Demonstration of a coherent UDWDM-PON with real-time processing | |
| CN101742738B (en) | Full duplex optical carrier radio frequency RoF link system | |
| Yu et al. | Cost-effective optical millimeter technologies and field demonstrations for very high throughput wireless-over-fiber access systems | |
| Zhao et al. | 200 Gb/s FSO WDM communication system empowered by multiwavelength directly modulated TOSA for 5G wireless networks | |
| Amiri et al. | W-Band OFDM transmission for radio-over-fiber link using solitonic millimeter wave generated by MRR | |
| CN103516429A (en) | W waveband broadband millimeter wave full duplex access method and system based on local oscillation broadcasting | |
| CN103840885B (en) | High carrier frequency and high speed light millimeter wave generating and long-span transmission system | |
| Sarup et al. | Performance analysis of an ultra high capacity 1 Tbps DWDM-RoF system for very narrow channel spacing | |
| Cvijetic et al. | 4+ G mobile backhaul over OFDMA/TDMA-PON to 200 cell sites per fiber with 10Gb/s upstream burst-mode operation enabling< 1ms transmission latency | |
| Salgals et al. | Hybrid ARoF-WDM PON infrastructure for 5G millimeter-wave interface and broadband internet service | |
| CN103905123B (en) | The adjustable remote local-oscillator source of a kind of Frequency and Amplitude in optical millimeter wave system | |
| CN103684610B (en) | A kind of remote high-frequency microwave generating source in optical millimeter wave system | |
| CN103825659B (en) | A kind of high rate optical millimeter wave is produced and non-relay long span Transmission system | |
| CN208337586U (en) | A kind of fiber radio integration communication system of more scene applications | |
| Chowdhury et al. | Demonstration of simultaneous all-optical up-conversion of gigabit wireless services at 60-GHz and 64-GHz in converged optical wireless system carried by single wavelength lightwave | |
| Guan et al. | Enabling 5G services in PON with a novel smart edge based on SiP MRM | |
| Chaibi et al. | Directly-modulated IM/DD OFDM transmission over 100-km SSMF using SSB filtering with two silicon micro-ring resonators | |
| Kanno et al. | All-spectrum fiber-wireless transmission for 5G backhaul and fronthaul links | |
| CN101217317A (en) | A millimeter wave generation method and system with single phase modulator | |
| Salgals et al. | Research of PAM-4 Modulated WDM-PON Architecture for 5G Millimeter-wave Hybrid Photonics-wireless Interface | |
| Al-Hetar et al. | 10Gbps MMW backhaul network based on FBMC-PON-WDM | |
| CN108521299A (en) | A kind of the fiber radio integration communication system and signal processing method of more scene applications | |
| Jia et al. | A bi-directional radio-over-fiber system with all-optical up-converted DPSK for downstream and re-modulated OOK for upstream | |
| Ostrovskis et al. | Demonstration of Ka-band mm-wave ARoF signal transmission | |
| Lakshmijayasimha et al. | Optical frequency comb and active demultiplexer-enabled 60 GHz mmW ARoF transmission using directly modulated 64-QAM UF-OFDM signals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |