Browsing by Author "Shih, Boris (Po-Tsung)"

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Direct-Detection PDM-OFDM RoF System for 60-GHz Wireless VHMO transmission without Polarization Tracking
(2015)
Huang, Hou-Tzu
;
Sun, Chung-Shin
;
Lin, Chun-Ting
;
Wei, Chia-Chien
;
Zeng, Wei-Siang
This work experimentally demonstrates a 60-GHz direct-detection PDM-OFDM system without polarization tracking at the receiver. A BER of 3.8x10(-3) was achieved with all states of polarization over 10-km fiber and 3-m wireless MIMO transmission.
Theoretical and Experimental Investigation of a 2 x 2 MIMO OFDM Radio-Over-Fiber System at 60-GHz With I/Q Imbalance Compensation
(2014-10-15)
Ho, Chun-Hung
;
Lin, Chun-Ting
;
Lu, Tsung-Hung
;
Huang, Hou-Tzu
;
Shih, Boris (Po-Tsung)
This paper investigates the efficacy of two methods for compensating I/Q imbalance, which causes serious performance problems in wideband (6.98-GHz spectrum) millimeter-wave systems employing MIMO signal transmission. A 60-GHz orthogonal frequency division multiplexing (OFDM) RoF system employing 2 x 2 MIMO technology is implemented using a commonly used training symbol arrangement and a proposed method. We experimentally demonstrate that the proposed training symbol arrangement performed significantly better than the commonly used approach. By combining the proposed training symbol arrangement with LMS I/Q compensation and bit-loading, we achieve an extremely high wireless data rate transmission of 75.211 Gb/s over both 50 km of standard single-mode fiber and 3.5-m wireless distance. The optical power penalty after 50-km fiber transmission was only similar to 1 dB.