Cost-Effective Optical Millimeter Technologies and Field Demonstrations for Very High Throughput Wireless-Over-Fiber Access Systems

Yu, Jianjun; Chang, Gee‐Kung; Jia, Zhensheng; Chowdhury, Arshad; Huang, Ming-Fang; Chien, Hung‐Chang; Hsueh, Yu-Ting; Jian, Wei; Liu, Cheng; Dong, Ze

doi:10.1109/jlt.2010.2041748

Cited by 104 publications

(2 citation statements)

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“…Furthermore, the higher operation frequency presents more capacity to the system to increase the bitrate or bandwidth. [8][9][10][11][12][13][14][15][16][17][18][19][20]21,22 Another advantage of moving to these two bands is the inherent security of the signal in this range. The millimeter wave signal has a relatively very short propagation distance over-the-air due to the atmospheric substances.…”

Section: Introductionmentioning

confidence: 99%

Expandable high-capacity wavelength division multiplex-over-optical code division multiple access millimeter wave radio-over-fiber system

Eghbal

Shadaram

2019

Opt. Eng.

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The design and performance evaluation of a W-band wavelength division multiplexed-over-optical code division multiple access radio-over-fiber system are presented. The system's performance introduces expansion in the number of channels and bit rate per channel for millimeter wave signals by optically encoding signals in a multiwavelength transmission system. The performance of the system is verified based on software simulation of three channels that carry six users' encoded data. The achieved results are measured in bit-errorrate and eye-diagram figures. The obtained results are analyzed for each wavelength channels and each code families used. Bit error rates of 10 −2 to 10 −6 are obtained for channels operating at 10 Gb∕s.

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Section: Introductionmentioning

confidence: 99%

Expandable high-capacity wavelength division multiplex-over-optical code division multiple access millimeter wave radio-over-fiber system

Eghbal

Shadaram

2019

Opt. Eng.

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“…Among mm-wave bands, W band (75-110 GHz) with high bandwidth and less than 0.5 dB/km atmospheric loss [1] is very suitable for high capacity wireless transmission over long distance. Because of the constraint of electrical component bandwidth, photonic mm-wave technique is adopted to generate the W band signal, which further promotes the seamless integration of wireless and fiber-optic networks [2]- [7].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Fiber-Wireless MIMO System With Different LO at W Band

et al. 2015

IEEE Photonics J.

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We experimentally demonstrate an optical-wireless transmission system at W band, which can support long-distance wireless transmission and tolerate some frequency difference of the local oscillators (LOs) at the receiver. The generation of millimeterwave signal is based on the photonic technique by heterodyne mixing of an optical polarization division multiplexing quadrature phase shift keying (PDM-QPSK) signal and an optical LO signal. After 20-km fiber transmission, tens of gigabit-per-second millimeter-wave signals are delivered over multiple-input-multiple-output (MIMO) wireless links by different polarization antennas. Then, analog downconversion is performed before the received signal is demodulated by coherent detection and advanced digital signal processing. Using this system, we experimentally demonstrate the transmission of 18.7-, 29.9-, and 37.4-Gb/s PDM-QPSK wireless signals at W band over 80-, 40-, and 20-m wireless links, respectively, with bit error rate less than the forward error correction threshold of 3:8 Â 10 À3 . In addition, we investigate the effect of different frequency LOs on the MIMO system performance, finding that the system can tolerate about 1.25-GHz frequency difference for a 10-Gbaud signal. The proposed system can be suitable for the building-to-building broadband connection, inbuilding hybrid fiber-wireless access networks, and some scenarios that bridge natural obstacles and difficult-to-access terrain.

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Signal upconversion for a radio‐over‐fiber system with modulation types based on a frequency quadrupling technique

Lin

Chang

et al. 2014

Micro & Optical Tech Letters

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It is observed from the Eq. (1) that the length parameter "t" is nearly equal to k/4 for all tuning frequencies (6.096-3.51 GHz). Maximum difference for the calculation of "t" from the Eq. (1) and Table 1 is about 0.5 mm, which is very small. Fabricated prototypes of the Antenna 3 (for t 5 13.25 mm and t 5 21.6 mm) are shown in Figures 3(a)-3(c). Measurement results for reflection coefficient are carried out using VNA (Agilent N5 230A). Comparisons between simulated and measured reflection coefficient are shown in Figure 4. Measured resonant frequencies are 3.486 GHz for the antenna with t 5 21.6 mm [Figs. 3(a) and 3(c)] and 5.664 GHz for the antenna with t 5 13.25 mm [Figs. 3(a) and 3(b)]. Measured 210 dB impedance bandwidths are about 180 MHz for t 5 21.6 mm and 420 MHz for t 5 13.25 mm. However, the discrepancy between the measured and simulated results is (about 0.85% for t 5 21.6 mm and 3.1% for t 5 13.25 mm in resonance frequencies) due to the effect of soldering of SMA connector and fabrication tolerance. Measured radiation patterns at 5.664 and 3.486 GHz are shown in Figures 5(a) and 5(b). Resolution of the measurement is 10 for h and u of the spherical coordinate systems. The directions of the maximum radiations for E-plane (u 5 0 ) copolarization are 0 and 260 at 5.664 GHz [Fig. 5(a)]. At 3.486 GHz, the directions of the E-plane copolarization broadside patterns are seen in 16-88 and 254 [Fig. 5(b)]. The antenna with t 5 21.6 mm, shows its minimum E-plane copolarization gain in 210 (blind point) direction. The cross polarization level at 5.664 GHz [ Fig. 5(a)] is less than 221 dB. However, at lower frequency (3.486 GHz), the antenna cross polarization level is increased (about 211 dB) due to the unsymmetrical voltage distribution between the two radiating edges of the patch. The gain of the antenna for t 5 13.25 mm is 2.16 dB and t 5 21.6 mm is 1.13 dB. CONCLUSIONA compact bandwidth enhanced microstrip antenna with frequency tuning capability has been proposed in this article. Parametric study of the RGS was carried out and results were validated by the measurement results. It has been observed that the ground slot length is nearly equal to the quarter wavelength of the proposed antenna over the whole tuning frequencies (6.096-3.51 GHz) and, thus, size reduction is obtained. The tuning bandwidth of the proposed antenna is about 53.84%. The antenna can also operate in IEEE 802.11a WLAN band (5.12-5.86 GHz) with bandwidth of about 13.48% and compactness of 53.67%.ABSTRACT: In this study, optical upconverted microwave frequency generation was experimentally demonstrated using a frequency quadrupling technique based on two types of baseband signal modulation in a radio-over-fiber (RoF) system. The measured results revealed that an error-free transmission could be achieved without causing the periodic power fading affect, and that clear eye diagrams were obtained after a 20-km transmission by using baseband/RF mixed-signal external modulation. The proposed method is a feasible technique for generating a 622 ...

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Cost-Effective Optical Millimeter Technologies and Field Demonstrations for Very High Throughput Wireless-Over-Fiber Access Systems

Cited by 104 publications

References 91 publications

Expandable high-capacity wavelength division multiplex-over-optical code division multiple access millimeter wave radio-over-fiber system

Expandable high-capacity wavelength division multiplex-over-optical code division multiple access millimeter wave radio-over-fiber system

Experimental Investigation on Fiber-Wireless MIMO System With Different LO at W Band

Signal upconversion for a radio‐over‐fiber system with modulation types based on a frequency quadrupling technique

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