60 GHz毫米波在光纤与无线中的传输实验研究

Tang, Qi; Chen, Lin; Xiao, Jiangnan; Cao, Zizheng

doi:10.3788/col201109.050601

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…Other than attenuation, the major impairments in the wireless link are jitter, additional white noise, and distortion. For optical transmission, the inter symbol interference (ISI) due to fiber dispersion plays a significant role in the limitations in a converged RF and fiber system [17]. The best optimal solution to take advantage of free large bandwidth of 60 GHz band is to converge it with PON, which can provide high speed wireless internet to new generation of smart phones and tablets by utilizing the existing infrastructure of PON.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Generations of Independent Millimeter Wave and 10 Gbit/s Wired Signal by Single Electrode Modulator in TDM-PON Network

Niazi¹,

Zhang

et al. 2013

J. Opt. Commun.

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We propose and present a cost effective and simple technique of simultaneous generation and propagation of millimeter wave with recently standardized 10 giga bit passive optical network (GPON) by mixing of 2.5 Gbit/s, 30 GHz radio wave with 10 Gbit/s based band signal and then modulated by single Mach Zehnder modulator (MZM). In this scheme, we have applied 1490 nm for downstream, 1310 nm for upstream transmission and ON OFF keying (OOK) modulation format to make it fully align with existing standards and infrastructure. Simulation results show error free transmission performance with negligible power penalty over 25 km bidirectional fiber. We also highlight the principles and discuss the main technical challenges for commercial realization of 60 GHz spectrum.Keywords: radio over fiber (RoF), division m (TDM), passive optical network (PON), on off keying (OOK), wave

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Section: Introductionmentioning

confidence: 99%

Simultaneous Generations of Independent Millimeter Wave and 10 Gbit/s Wired Signal by Single Electrode Modulator in TDM-PON Network

Niazi¹,

Zhang

et al. 2013

J. Opt. Commun.

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“…As previously demonstrated, the proposed configuration works at a higher frequency band such as 40 GHz [6] . The result is also expected to suit 60 GHz millimeter-wave systems [7] with sufficient modulator bandwidth.Generally, a radial distortion is introduced to the VMS constellation through nonlinearity when the input power increases. The process results in various link coefficients, including gain (or loss) and photodiode (PD) response, which are common divisors divided from the error term and the distortion-free signal term of the EVM calculation.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Highly linear transmission and EVM improvement of vector modulation signals for radio-over-f iber applications

Yu¹,

Li²,

Zheng³

et al. 2012

中国光学快报

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The principle of error vector magnitude (EVM) against modulator nonlinearity for vector modulation signal (VMS) transmission in radio-over-fiber (RoF) systems is theoretically and experimentally investigated. A highly linear modulation scheme is proposed and demonstrated using a single-drive dual parallel Mach-Zehnder modulator (MZM). This method improves EVM performance and enlarges the linear input dynamic range of the VMS transmission. An index of maximum allowable input power difference (MAIPD) that reflects the difference of upper input power limits between these two schemes is measured. An EVM limitation of 5% MAIPD has 5 dB. Both 16-and 64-QAM results indicate that the proposed scheme supports VMS transmission better than the MZM one.OCIS codes: 060.2360, 060.4080, 060.5625. doi: 10.3788/COL201210.100606.The combination of wireless and fiber access technology makes radio-over-fiber (RoF) application a promising tool in bringing high-speed broadband wireless services into reality [1] . Recent studies have increasingly focused on complex modulation formats, such as quadrature phase shift keying (QPSK), quadrature amplitude modulation (QAM), and even orthogonal frequency-division multiplexing (OFDM), including the transmission quality of these formats. Previous reports have demonstrated the performances of each signal in different RoF systems [2−4] . Moreover, input signal power increase is effective, to some extent, in combating noise [3] and fiber dispersion [4] . Unfortunately, the applicable range is too narrow because nonlinearity, especially modulator nonlinearity, seriously worsens signal-to-noise ratio (SNR) and error vector magnitude (EVM) when more power is added. We have previously reported a highly linear modulation by optically mitigating the third-order inter-modulation distortion (IMD) [5] . The proposed scheme demonstrates better linear transmission capability, with 16-QAM modulation signals compared with the results of a quadrature biased Mach-Zehnder modulator (QB-MZM). Nevertheless, such finding lacks theoretical explanation for EVM improvement, an area that should be studied further for guidance in real applications.In this letter, experiments are conducted between systems that use a single-drive dual-parallel MZM (SD-DPMZM) and a QB-MZM, respectively. The study is conducted with EVM serving as critical evaluations of vector modulation signal (VMS) transmission in a RoF system. The proposed technique is then extended to incorporate the capability of reducing the EVM of VMS for application in high-power input scenarios. To the best of our knowledge, it is the first time to present the evolution of EVM versus modulator nonlinearity in RoF schemes.Compared with previous studies, the work presented here focuses on lower RF carrier frequency (5 GHz) and bit-rates (up to 300 Mbps). This work, however, is acceptable in cellular and WLAN applications, where the wireless band rangs from 900 MHz to 5.2 GHz [2] . As previously demonstrated, the proposed configuration works at a higher frequency ban...

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“…Moreover, holographic techniques can be easier to achieve in the MMW band than optic waves, as we can get the amplitude and phase of the MMW signal easily. Additionally, the extreme development of MMW chips, modules and communication and system techniques make MMW security detection possible [2][3][4][5][6][7][8][9] . MMW imaging can be classified as a passive imaging system and an active imaging system.…”

mentioning

confidence: 99%

Practical millimeter-wave holographic imaging system with good robustness

Zhu

Yang

et al. 2016

中国光学快报

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A practical millimeter-wave (MMW) holographic imaging system with good robustness is developed for the detection of concealed weapons at security checkpoints, especially at the airport. The system is used to scan the passenger and detect any weapons hidden in their clothes. To reconstruct the three dimensional image, a holographic MMW imaging algorithm based on aperture synthesis and backscattering is presented. The system is active and works at 28-33 GHz. As a practical imaging system, the robustness is analyzed in detail in terms of the peak signal-to-noise ratio. With the growing threat of terrorism around the world nowadays, security detection of airplane passengers is becoming more and more important [1] . Conventional systems for security detection include metal detectors for personnel and x ray scanners for luggage. Compared with these methods, millimeter-wave (MMW) imaging is more effective and safe. MMW imaging combines the advantages of both optical and microwave imaging systems, particularly the high resolution of optical imaging due to the short wavelength and penetration through most clothing of microwave imaging. Moreover, holographic techniques can be easier to achieve in the MMW band than optic waves, as we can get the amplitude and phase of the MMW signal easily. Additionally, the extreme development of MMW chips, modules and communication and system techniques make MMW security detection possible [2][3][4][5][6][7][8][9] . MMW imaging can be classified as a passive imaging system and an active imaging system. There is no illuminating source in a passive system [10][11][12][13][14][15][16][17] . It only records the intensity of objects and works through these signals. Scattering information of the target can be obtained because different electromagnetic strengths are emitted due to the different temperatures. An active system transmits MMW signals, receives them reflected by the objects [18][19][20][21][22][23][24] , and interferes them with the transmitting ones. Then, both the amplitude and phase can be recorded.Because of the advantages of MMW imaging systems, we present an active MMW holographic imaging system. A practical system has been realized in our lab, and good robustness of the system is achieved. When it comes to the word "practical," we mean the system can work even if some useful electromagnetic information is missing, which could happen in practical, complicated circumstances. In other words, the system does not just work in a perfect lab environment. The less electromagnetic data is necessary when reconstructing the image, the more practical the system is. First, the imaging system is described in detail, and then the imaging algorithm is presented. Next, an analysis of the robustness of the imaging system through the peak signal-to-noise ratio (PSNR) is demonstrated. Finally, conclusions are drawn at the end of the Letter.A practical implementation of an MMW holographic imaging system is performed. It takes quite a long time to scan a single transceiver over the whole aperture,...

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60 GHz毫米波在光纤与无线中的传输实验研究

Cited by 3 publications

References 5 publications

Simultaneous Generations of Independent Millimeter Wave and 10 Gbit/s Wired Signal by Single Electrode Modulator in TDM-PON Network

Simultaneous Generations of Independent Millimeter Wave and 10 Gbit/s Wired Signal by Single Electrode Modulator in TDM-PON Network

Highly linear transmission and EVM improvement of vector modulation signals for radio-over-f iber applications

Practical millimeter-wave holographic imaging system with good robustness

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