Browsing by Author "Chi, Sien"

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100-GHz DD-OFDM-RoF system over 150-km fiber transmission employing pilot-aided phase noise suppression and bit-loading algorithm
(2014-02-24)
Huang, Hou-Tzu
;
Liang, Wan-Ling
;
Lin, Chun-Ting
;
Wei, Chia-Chien
;
Chi, Sien
This study extended the transmission distance of a 100-GHz DD-OFDM-RoF system through the reduction of chromatic dispersion-induced phase noise. The implementation of a pilot-aided phase noise suppression (PPNS) scheme enabled the transmission of distance-insensitive 16.97-Gbps QPSK OFDM over 0 similar to 150-km fiber and 2-m air transmission via a DFB laser with linewidth of 1 similar to 10-MHz. We applied a bit-loading algorithm in conjunction with PPNS to maximize spectral efficiency, resulting in a 93% improvement in the data rate from 11.53 to 22.27 Gbps at a fiber transmission of 150 km. (C) 2014 Optical Society of America
12.5-Gb/s Wireless Data Transmission by Using Bias Modulation of NBUTC-PD Based W-Band Photonic Transmitter-Mixer
(2010)
Kuo, F. -M.
;
Yen-Lin, Ho
;
Shi, J. -W.
;
Chen, Nan-Wei
;
Jiang, Wen-, Jr.
We demonstrated near-ballistic uni-traveling-carrier photodiode based broadband photonic transmitter-mixers with quasi-Yagi radiators fed horn antennas. 100GHz wireless transmission with date rate as high as 12.5-Gb/s via bias modulation under high photocurrent (20mA) has been achieved. (C)2009 Optical Society of America
13.75-Gb/s OFDM Signal Generation for 60-GHz RoF System within 7-GHz License-Free Band via Frequency Sextupling
(2009)
Shih, Po-Tsung
;
Lin, Chun-Ting
;
Huang, Han-Sheng
;
Jiang, Wen-Jr
;
Chen, Jyehong
A 60-GHz RoF system with frequency sextupling is experimentally demonstrated. Based on modified SSB, a 13.75-Gb/s OFDM signal is generated within the 7-GHz license-free band. No penalty is observed after transmission over 25-km single-mode fiber.
14 dB gain, 1.3 mu m diode laser amplifier with reshaping capability using main-mode suppression and injection technique
(2006)
Chien, Hung-Chang
;
Lee, Chien-Chung
;
Chi, Sien
;
光電工程學系
;
Department of Photonics
A novel and cost-effective 1.3 mu m diode laser amplifier with reshaping capability using main-mode suppression and injection technique is proposed. 14-dB gain and 10-Gb/s transmission over 60-km with power penalty < 0.84 dB are achieved.
14 Gbps 60 GHz RoF Link Employing a Simple System Architecture and OFDM Modulation
(2009)
Ng\'oma, Anthony
;
Sauer, Michael
;
Annunziata, Frank
;
Jiang, Wen-, Jr.
;
Shih, Po-Tsung
A radio-over-fiber system with a simple architecture is used to transport a 14 Gbps OFDM signal occupying the full 60 GHz band. Fiber lengths exceeding 3km are supported without any dispersion compensation.
150-km 103-GHz Direct-Detection OFDM-RoF System Employing Pilot-aided Phase Noise Suppression
(2014-01-01)
Huang, Hou-Tzu
;
Liang, Wan-Ling
;
Wei, Chia-Chien
;
Lin, Chun-Ting
;
Chi, Sien
Pilot-aided phase noise suppression (PPNS) is employed to demonstrate distance-and linewidth-insensitive 103-GHz DD-OFDM-RoF systems. With 10.3-MHz linewidth, PPNS lowers BER of -6-dBm signal from >10(-2) to <10(-3) over 150-km fiber and 2-m wireless transmission.
2.5 dB sensitivity improvement by optimizing the driving voltage of an MZM and electrical filter bandwidth of optical duobinary transmission systems
(2006)
Lu, Yu-Chang
;
Wei, Chia-Chien
;
Chen, Jason (Jyehong)
;
Tsao, Cheng
;
Chi, Sien
We numerically and experimentally demonstrated that 100% driving voltage doesn't necessarily yield optimal results in duobinary systems. Compared with conventional condition, a 2.5 dB sensitivity improvement is obtained using 3 GHz LPFs with optimum voltage. (C) 2006 Optical Society of America.
21 Gbps OFDM Wireless Signal Transmission at 60 GHz Using a Simple IMDD Radio-over-Fiber System
(2010)
Ng\'oma, Anthony
;
Shih, Po-Tsung
;
George, Jacob
;
Annunziata, Frank
;
Sauer, Michael
A simple double-sideband IMDD RoF system is successfully employed to directly transport a 21 Gbps OFDM signal at 60 GHz over 500 m of standard single-mode fiber and 10 m wireless distance. (C)2010 Optical Society of America
28-Gb/s 16-QAM OFDM Radio-over-Fiber System Within 7-GHz License-Free Band at 60 GHz Employing All-Optical Up-conversion
(2009)
Lin, Chun-Ting
;
Wong, Er-Zih
;
Jiang, Wen-Jr
;
Shih, Po-Tsung
;
Chen, Jason (Jyehong)
A record 28-Gb/s 16-QAM OFDM system within 7-GHz license-free band at 60 GHz employing all-optical up-conversion with frequency quintupling is experimentally demonstrated. Negligible penalty is observed following 100-km SMF transmission without any dispersion compensation. (C)2008 Optical Society of America
2x21 Gbps Symmetrical Full-Duplex Transmission of OFDM Wireless Signals over a Bidirectional IMDD Radio-over-Fiber System at 60 GHz
(2010)
Shih, Po-Tsung
;
Ng'oma, Anthony
;
Lin, Chun-Ting
;
Annunziata, Frank
;
Chen, Jyehong
A full-duplex bidirectional 60 GHz RoF system for in-building wireless applications employing DSB IMDD techniques is experimentally demonstrated. Symmetrical 2x21 Gbps transmission over 500-m standard single mode fiber and 2.5-m wireless distance is successfully achieved.
31 Gbps RoF System Employing Adaptive Bit-Loading OFDM Modulation at 60 GHz
(2011-01-01)
Ng'oma, Anthony
;
Lin, Chun-Ting
;
He, Li-Ying Wang
;
Jiang, Wen-, Jr.
;
Annunziata, Frank
Record wireless data transmission of 31.4 Gbps within 7 GHz license-free band at 60 GHz is experimentally demonstrated using adaptive bit-loading OFDM modulation. Adaptive bit-loading OFDM also enables extended fiber transmission distances beyond 5km.
32.65-Gbps OFDM RoF Signal Generation at 60GHz Employing an Adaptive I/Q Imbalance Correction
(2010)
Jiang, Wen-Jr
;
Lin, Chun-Ting
;
He, Li-Ying Wang
;
Wei, Chia-Chien
;
Ho, Chun-Hung
We experimentally demonstrated an adaptive I/Q imbalance correction scheme to compensate I/Q-imbalance. With I/Q correction, a 32.65-Gbps OFDM signal at 60 GHz within 7-GHz license-free band is successfully generated and, following 25km SMF transmission, negligible power penalty is observed.
43.63-Gbit/s Multiple-User SC-FDMA PON With Sub-Nyquist Receiver and PAPR Reduction
(2018-10-01)
Lin, Chi-Hsiang
;
Fang, Ruei
;
Lin, Chun-Ting
;
Wei, Chia-Chien
;
Chi, Sien
In this letter, we propose a novel delay-division-multiplexing (DDM) scheme to enable SC-FDMA PON with a sub-Nyquist sampling rate ADC and lower PAPR, named time-interleaved FDMA (TI-FDMA). The proposed pre-processing method reduces the sampling rate of the ADC to 1/2 similar to 1/32 of the Nyquist sampling rate. The FFT size can be reduced to 1/32 (i.e., from 1024 to 32) due to lower sampling ratio and each user just needs to recover and demodulate their corresponding data without any additional DSP, which greatly reduces the complexity of the receiver. Meanwhile, the proposed TI-FDMA has lower PAPR than traditional localized FDMA (L-FDMA), interleaved FDMA (I-FDMA), and OFDM. Such the PAPR reduction makes TI-FDMA support the modulation format of 1 order higher compared to OFDM, thereby, leading to 12.5% capacity improvement. Employing the proposed scheme, up to 43.63-Gbps PON is experimentally demonstrated, and each of 32 users requires only 0.5-GSample/s ADC.
43.63-Gbit/s Multiple-User SC-FDMA PON with sub-Nyquist Receiver and PAPR Reduction
(2018-01-01)
Chang, Hao-Hsiang
;
Lin, Chi-Hsiang
;
Fang, Ruei
;
Lin, Chun-Ting
;
Wei, Chia-Chien
We demonstrate 43.63-Gbps SC-FDMA with 0.5-GSample/s sampling-rate receiver (1/32 Nyquist sampling rate) for each 32-user, which was experimentally demonstrated in commercial optical transmitter and receiver. A brief introduction of traditional SC-FDMA including L-FDMA and I-FDMA is contained. Meanwhile, a PAPR reduction is included in the proposed SC-FDMA system. The method of PAPR reduction makes the PAPR of SC-FDMA be isolated with the number of users and be lower than that of OFDM over 1-dB. Compared to OFDM, such reduction enables SC-FDMA to carry higher-order modulation format, achieving 12.5% capacity improvement (i.e. increases from 37.76 Gbit/s to 43.63 Gbit/s). Moreover, receivers' FFT size will be reduce to 1/32 of that in conventional SC-FDMA. We also compare results with L-FDMA, I-FDMA, and OFDM utilizing high sampling-rate ADC.
5-bit/s/Hz 50-Gbps W-band Optical/Wireless System Employing Single-Sideband Single-Carrier Modulation
(2014-01-01)
Ho, Chun-Hung
;
Cheng, Yu-Hsuan
;
Huang, Hou-Tzu
;
Lin, Chun-Ting
;
Wei, Chia-Chien
We experimentally demonstrate W-band radio-over-fiber system employing single-sideband single-carrier modulation with lower PAPR than OFDM. Up to 50-Gbps wireless transmission with the highest spectral efficiency of 5-bit/s/Hz at 103GHz can be achieved over 25-km fiber.
58.74-Gb/s 2 x 2 MIMO 60-GHz Optical/Wireless System With Simple Power-Detector Down-Conversion
(2019-06-01)
Chen, Wen-Huang
;
Chen, Chao-Wei
;
Lin, Chun-Ting
;
Wei, Chia-Chien
;
Chi, Sien
We demonstrate a 58.74-Gb/s V-band orthogonal frequency-division multiplexing (OFDM) radio-over-fiber (RoF) system employing the 2 x 2 multiple-input-multiple-output (MIMO) technology and power detector for down-conversion for the first time. Additional radio frequency (RF) tone is generated and transmitted from central station to replace the local oscillator at wireless receiver for power detector down-conversion. To enhance spectrum efficiency, the gap between OFDM signal and RF tone is not needed. However, the down-converted signal will suffer signal-to-signal beating interference (SSBI). In this letter, we propose and successfully employ the 2 x 2 MIMO SSBI mitigation schemes to mitigate SSBI, resulting in 45% capacity improvement.
60-GHz Photonic Vector Signal Generation Employing Frequency Quadrupling Scheme for Radio-over-Fiber Link
(2009)
Jiang, Wen-Jr
;
Lin, Chun-Ting
;
Huang, Han-Sheng
;
Shih, Po-Tsung
;
Chen, Jason(Jyehong)
A novel 60-GHz photonic millimeter-wave signal generation using a frequency quadrupling technique is proposed for the first time. A 312.5-MSym/s 8-QAM millimeter-wave signal at 60 GHz is demonstrated with negligible penalty following 25-km SMF transmission. (C) 2008 Optical Society of America
A continuously tunable and filterless optical millimeter-wave generation via frequency octupling
(2009-10-26)
Lin, Chun-Ting
;
Shih, Po-Tsung
;
Jiang, Wen-Jr
;
Chen, Jason (Jyehong)
;
Peng, Peng-Chun
This work proposes a cost-effective, continuously tunable and filterless optical millimeter-wave (MMW) signal generation employing frequency octupling. Optical MMW signals with 30-dB undesired sideband suppression ratios can be obtained. Since no optical filtering is required, the proposed system can be readily implemented in wavelength-division-multiplexing (WDM) systems. V-band 60-GHz and W-band 80-GHz optical MMW signals are experimentally demonstrated. Because of the high undesired sideband suppression ratio, 60-GHz waveform with 50% duty cycle is observed. The single-sideband (SSB) phase noise of the generated 60-GHz signal is -73 dBc/Hz at 10 kHz. The proposed system is a viable solution for the future ultra-high frequency MMW applications up to 320 GHz using the external modulator with a limited bandwidth of 40 GHz. (C) 2009 Optical Society of America
A Full duplex radio-over-fiber link with Multi-level OFDM signal via a single-electrode MZM and wavelength reuse with a RSOA
(2010-02-01)
Jiang, Wen-Jr
;
Lin, Chun-Ting
;
Shih, Po-Tsung
;
Chen, Jason (Jyehong)
;
Peng, Peng-Chun
This work demonstrates the feasibility of a full duplex Radio-over-fiber (RoF) link employing multi-level OFDM signal via a single-electrode Mach-Zehnder modulator and wavelength reuse for uplink utilizing a reflective semiconductor optical amplifier (RSOA). A High spectral efficiency 5-Gb/s 16-QAM OFDM signal with frequency multiplication for the RoF downstream link is demonstrated, and negligible penalty is achieved after 25-km standard single mode fiber transmission. Furthermore, wavelength reuse for a 1.25-Gb/s OOK signal via a RSOA for the upstream link is also demonstrated with a receiver penalty of less than 0.5 dB following 25-km SMF transmission. (C) 2010 Optical Society of America
A good performance 3-dB splitter based on coupling-weighted and velocity-tapered waveguides
(2015-09-01)
Wang, Hseng-Tsong
;
Chen, Chi-Feng
;
Chi, Sien
;
光電工程學系
;
Department of Photonics
A coupling-weighted and velocity-tapered 3-dB splitter with a symmetric triple-mode evolution structure weighted by the Blackman function is analytically and numerically investigated for C+L-band passive optical network applications. The splitter is analyzed by the coupled-mode theory and simulated by the use of three-dimensional finite-difference beam propagation method. It is found that the power uniformity, wavelength dependent loss, excess loss and polarization dependent loss of the proposed 3-dB splitter in the whole C+L-band are better than 2.49 x 10(-3) dB, 0.018 dB, 0.14 dB, and 0.004 dB, respectively. It is evident that the 3-dB splitter can achieve the good performances for C+L-band passive optical network applications. (C) 2015 Elsevier B.V. All rights reserved.