Browsing by Author "Li, Che-Hao"

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V-band Gapless OFDM RoF System with Power Detector Down-conversion and Novel Volterra Nonlinear Compensation
(2016)
Chiang, Shou-Chih
;
Li, Che-Hao
;
Lin, Chun-Ting
;
Huang, Hou-Tzu
;
Lin, Chi-Hsiang
V-band gapless OFDM RoF system with power detector down-conversion is proposed. We propose and successfully employ a novel Volterra nonlinear compensation to mitigate signal-to-signal beating interference, resulting in 22% data rate improvement with bit-loading algorithm.
V-band gapless OFDM RoF system with power detector down-conversion and novel Volterra nonlinear filtering
(2017-01-15)
Lin, Chun-Ting
;
Chiang, Shou-Chih
;
Li, Che-Hao
;
Huang, Hou-Tzu
;
Lin, Chi-Hsiang
This Letter presents a V-band gapless orthogonal frequency division multiplexing (OFDM) RoF system at 60 GHz employing a power detector to support vector signal down-conversion. Additional RF tone is generated and transmitted from a central station to replace the local oscillator at a wireless receiver for power detector down-conversion. To enhance the spectrum efficiency, the gap between the OFDM signal and the RF tone is not needed. However, the down-converted signal will suffer signal-to-signal interference (SSBI). In this Letter, we propose and successfully employ a novel Volterra nonlinear compensation to mitigate SSBI, resulting in a 22% data rate improvement with a bit-loading algorithm. (C) 2017 Optical Society of America
W-band DD-OFDM-RoF System Employing Pilot-aided PAPR Reduction
(2014-01-01)
Huang, Hou-Tzu
;
Lin, Chun-Ting
;
Liu, Huan-Ching
;
Hsu, Hsun-Hao
;
Wu, Meng-Fan
We propose and experimental demonstrate a high spectral efficiency direct-detection radio-over-fiber (DD-RoF) system in W-band. To overcome the issue of peak-to-average power ratio (PAPR) in orthogonal frequency-division multiplexing (OFDM) signals, this study proposes a pilot-aided PAPR reduction simplified from Tellado's tone reservation. Using a 10-GHz 16-QAM OFDM signal, BER was improved from 1.3 x 10(-3) to 5.0 x 10(-4) over 4-km fiber and 2-m wireless transmission. Using a 32-QAM OFDM signal, the pilot-aided PAPR reduction improved the data rate from 45.2 Gbps to 47.6 Gbps under FEC limits (BER=3.8 x 10(-3)).
W-band OFDM Radio-over-Fiber system with power detector for vector signal down-conversion
(2015-06-01)
Lin, Chun-Ting
;
Wu, Meng-Fan
;
Ho, Chun-Hung
;
Li, Che-Hao
;
Lin, Chi-Hsiang
This Letter proposes a W-band OFDM RoF system at 103.5 GHz employing power detector to support vector signal down-conversion. Additional RF tone is generated and transmitted from central office to replace the local oscillator at a wireless receiver. With a proper frequency gap and power ratio between the RF tone and the OFDM-modulated signal, the impact from signal-to-signal beating interference can be minimized. The data rate can achieve a 40 Gbps 16 QAM OFDM signal over 25 km fiber and 2 m wireless transmission. (C) 2015 Optical Society of America
W-band OFDM RoF System with Simple Envelope Detector Down-Conversion
(2015)
Li, Che-Hao
;
Wu, Meng-Fan
;
Lin, Chi-Hsiang
;
Lin, Chun-Ting
;
光電系統研究所
This article proposes W-hand OFDM RoF system at 103.5 GHz employing envelop detector (ED) down-conversion. It can support vector signal down-conversion and doesn\'t need the LO in BS, The data rate of W-band OFDM signals with 10-GHz bandwidth can achieve 40 Gbps over 25-km fiber and 2-m wireless transmission.