Browsing by Author "Shih, Po-Tsung"

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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 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.
2 x 2 MIMO OFDM-RoF System Employing LMS-Based Equalizer With I/Q Imbalance Compensation at 60 GHz
(2014-06-01)
Huang, Hou-Tzu
;
Shih, Po-Tsung
;
Lin, Chun-Ting
;
Cheng, Yu-Hsuan
;
Liang, Wan-Ling
Multiple-input-multiple-output (MIMO) technology is a promising method to increase spectral efficiency in wireless communications. In this paper, a 60-GHz orthogonal frequency-division multiplexing radio over fiber (OFDM-RoF) system employing 2 x 2 MIMO wireless technology is demonstrated. With the proposed equalizer employing least mean squares (LMS) algorithm, MIMO channel mixing and I/Q-mismatch can be compensated simultaneously. 16-QAM and 32-QAM OFDM signal transmissions under forward error correction (FEC) threshold (1 x 10(-3)) are demonstrated. A data rate of 76.3 Gb/s can be achieved with a bit-loading algorithm over 25-km fiber transmission and 3.5-m wireless transmission.
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.
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 Novel Optical Direct-Detection I/Q Up-Conversion with I/Q Imbalance Compensation via Gram-Schmidt Orthogonalization Procedure
(2009)
Jiang, Wen-Jr
;
Lin, Chun-Ting
;
Wong, Er-Zih
;
Shih, Po-Tsung
;
Chen, Jason (Jyehong)
We proposed RF detect-detection vector signal generation using optical I/Q up-conversion. The Gram-Schmidt orthogonalization procedure is employed to compensate I/Q imbalance. After transmission over 100-km SMF, penalties of 5-Gb/s QPSK signals can be ignored.
A W-Band Photonic Transmitter-Mixer Based on High-Power Near-Ballistic Uni-Traveling-Carrier Photodiodes for BPSK and QPSK Data Transmission Under Bias Modulation
(2009-08-01)
Shi, Jin-Wei
;
Kuo, F. -M.
;
Wu, Y. -S.
;
Chen, Nan-Wei
;
Shih, Po-Tsung
In this study, we demonstrate wireless binary phase-shift keying (BPSK) and quadrature phase-shift keying (QPSK) data transmission at the-band by use of bias modulation on photonic transmitters-mixers, which are composed of near-ballistic uni-traveling-carrier photodiodes and quasi-Yagi antennas without the integration of an Si-lens. By use of such a device and a novel optical millimeter-wave source with octupling optical frequency, we can successfully achieve 1.25-Gb/s BPSK and 0.625-Gb/s QPSK data-transmission at 105 GHz with 5-GHz intermediate-frequency signals.
Experimental demonstration of a novel filterless frequency quadrupling technique for colorless WDM millimeter-wave up-conversion systems
(2009)
Jiang, Wen-Jr
;
Lin, Chun-Ting
;
Huang, Han-Sheng
;
Shih, Po-Tsung
;
Chen, Jason (Jyehong)
This study demonstrates a novel filterless frequency quadrupling technique for optical millimeter-wave generation and WDM up-conversion. After transmission of 50-km SMFF, the sensitivity penalty of each channel is less than 1.5 dB. (C)2008 Optical Society of America
Full duplex 60-GHz RoF link employing tandem single sideband modulation scheme and high spectral efficiency modulation format
(2009-10-26)
Shih, Po-Tsung
;
Lin, Chun-Ting
;
Jiang, Wen-Jr
;
Chen, Yu-Hung
;
Chen, Jason (Jyehong)
This study proposes a full duplex 60-GHz band radio-over-fiber (RoF) link using a modified tandem single sideband (TSSB) modulation scheme with frequency doubling. Based on the modified TSSB modulation scheme, no dispersion induced fading is observed; high spectral efficiency vector signal can be utilized; and wavelength reuse can also be achieved. Both single carrier 8-QAM and QPSK-OFDM signals for down-link transmissions are experimentally demonstrated. After transmission of 50-km SSMF, no significant receiver power penalties are observed. Wavelength reuses with 1.25-Gb/s OOK using a reflective semiconductor optical amplifier (RSOA) for up-link transmission are also demonstrated. After transmission of 50-km SSMF, no significant receiver power penalties are also observed. (c) 2009 Optical Society of America
Hybrid Access Network Integrated with Multi-level RF Vector Signal and Baseband Signal without Optical Filtering
(2009)
Shih, Po-Tsung
;
Lin, Chun-Ting
;
Chen, Yu-Hung
;
Jiang, Wen-Jr
;
Chen, Jason (Jyehong)
Hybrid access network integrated with multi-level wireless vector signal and wireline OOK signal without optical filter is proposed for the first time. 312.5-MSymbol/sec RF 8-PSK signal and 1.25-Gb/sec BB signal are experimentally demonstrated. (C) 2009 Optical Society of America
Hybrid Access Network Integrated With Wireless Multilevel Vector and Wired Baseband Signals Using Frequency Doubling and No Optical Filtering
(2009-07-01)
Shih, Po-Tsung
;
Lin, Chun-Ting
;
Jiang, Wen-Jr
;
Chen, Yu-Hung
;
Chen, Jason (Jyehong)
This letter experimentally demonstrated a hybrid access network which supports both radio-over-fiber and fiber-to-the-x systems. A 20-GHz radio-frequency (RF) 312.5-MSymbol/s M-ary phase-shift keying (PSK) signal and a baseband (BB) 1.25-Gb/s on-off keying signal are simultaneously generated and transmitted over an identical distributed infrastructure. The wired BB signal is compatible with the existing passive optical network (PON) system, and the wireless RF PSK signal can also share the same distributed infrastructure. The proposed system has no RF fading issue, no narrowband optical filter at remote node to separate the RF and BB signals, and can carry vector signals. Moreover, a frequency doubling for optical RF signal generation is achieved to reduce the bandwidth requirement of the transmitter. After transmission over 25-km standard signal-mode fiber, the receiver sensitivity penalties are less than 0.5 dB for both the RF and BB channels.
Hybrid Access Networks Integrated with Wireline and Wireless Services without Optical Filtering at Remote Nodes
(2008)
Shih, Po-Tsung
;
Lin, Chun-Ting
;
Chen, Jason (Jyehong)
;
Peng, Peng-Chun
;
Chi, Sien
A multi-services hybrid access network has been experimentally demonstrated. The scheme has no RF fading issue; can carry vector signals, and requires no optical filter at remote nodes.
Optical access system for dual service network
(2010-01-14)
Chen, Jyehong
;
Lin, Chun-Ting
;
Shih, Po-Tsung
;
Peng, Peng-Chun
;
Dai, Sheng-Peng
The present invention relates to an optical access system for dual service network, which mainly comprises an optical modulation device which is used to receive on-off keying (OOK) signal from cable network and radio frequency (RF) signal from wireless network, the optical modulation device then modulates the OOK signal and the RF signal to an optical signal and send out an output optical signal. Lastly, the output optical signal is being delivered to an optical receiving device through an optical fiber transmission channel, and the optical receiving device can access the OOK signal and RF signal from the output optical signal. In addition, the present invention does not require remote nodes (receiver side) to use any optical filter to discern on-off keying signal from cable network and RF signal from wireless network. The present invention can also apply to the field of wavelength-division multiplexing system.
Optical millimeter-wave signal generation using frequency quadrupling technique and no optical filtering
(2008-05-01)
Lin, Chun-Ting
;
Shih, Po-Tsung
;
Chen, Jason (Jyehong)
;
Xue, Wen-Qiang
;
Peng, Peng-Chun
This letter demonstrates a novel method to generate high-purity optical millimeter-wave signals with carrier suppression by using a frequency quadrupling technique. To the authors' knowledge, this is the first time that a frequency quadrupling system requires only a single integrated Mach-Zehnder modulator without a narrowband optical filter to remove undesired optical sidebands. Since no optical filter is needed, fast frequency tuning is straightforward and this approach will be particularly attractive for optical up-conversion in wavelength-division-multiplexing radio-over-fiber systems. This letter provides both theoretical analysis and experimental demonstration. The generated optical millimeter-wave signals have very high quality with an optical carrier and harmonic distortion suppression ratio of more than 38 and 36 dB at 40 and 72 GHz, respectively.