Browsing by Author "Wang, Chih-Yun"

Now showing 1 - 6 of 6

2 x 2 MIMO radio-over-fiber system at 60 GHz employing frequency domain equalization
(2012-01-02)
Lin, Chun-Ting
;
Ng'oma, Anthony
;
Lee, Wei-Yuan
;
Wei, Chia-Chien
;
Wang, Chih-Yun
This work experimentally demonstrates the efficacy of the 2 x 2 multiple-input multiple-output (MIMO) technique for capacity improvement of a 60-GHz radio-over-fiber (RoF) system employing single-carrier modulation format. We employ frequency domain equalization (FDE) to estimate the channel response, including frequency response of the 60 GHz RoF system and the MIMO wireless channel. Using FDE and MIMO techniques, we experimentally demonstrate the doubling the of wireless data capacity of a 60 GHz RoF system to 27.15 Gb/s using 16-QAM modulation format, with transmission over 25 km of standard single-mode fiber and 3 m wireless distance. (C) 2011 Optical Society of America
Direct-detection polarization division multiplexed orthogonal frequency-division multiplexing transmission systems without polarization tracking
(2012-12-15)
Wang, Chih-Yun
;
Wei, Chia-Chien
;
Lin, Chun-Ting
;
Chi, Sien
;
光電系統研究所
We experimentally demonstrate a direct-detection polarization division multiplexed (PDM) orthogonal frequency-division multiplexing (OFDM) scheme without dynamic polarization tracking. Simply using a polarization-diverse receiver, the proposed multiple-input multiple-output assisted system can achieve bit-error rate of 10(-3) over all possible received states of polarization. Moreover, 50 Gbps PDM-OFDM transmission over 100 km single-mode fiber is successfully demonstrated without dispersion-induced penalty. (C) 2012 Optical Society of America
MIMO-Enhanced Radio-over-Fiber System at 60 GHz
(2011-01-01)
Lin, Chun-Ting
;
Ng'oma, Anthony
;
Lee, Wei-Yuan
;
Wang, Chih-Yun
;
Lu, Tsung-Hung
We employ 2x2 MIMO spatial multiplexing to double the spectral efficiency of a 60GHz RoF system. A 27.15-Gbps 16-QAM MIMO signal with 3m wireless transmission is experimentally demonstrated within 7-GHz license -free spectrum at 60 GHz.
Performance Evaluation of a 60 GHz Radio-over-Fiber System Employing MIMO and OFDM Modulation
(2013-12-01)
Ho, Chun-Hung
;
Jiang, Wen-Jr
;
Sambaraju, Rakesh
;
Lee, Wei-Yuan
;
Lu, Tsung-Hung
Multiple-input-multiple-output (MIMO) technique for wireless communications is extensively used these days, especially to increase the spectral efficiency of new wireless communication systems like LTE, WiMAX, etc. MIMO in combination with robust modulation techniques like orthogonal frequency division multiplexing (OFDM) provides a good solution for high data rate wireless links. In this paper, the performance of MIMO for a 60 GHz OFDM radio over fiber link is analyzed. System performance of the MIMO system for different antenna spacing is also studied. Using the optimum system parameters, a MIMO OFDM wireless link of up to 51 Gb/s was successfully demonstrated at 60 GHz in a bandwidth of <7 GHz, with a wireless transmission distance of up to 4 m and optical fiber transmission of 1 km. To our knowledge this is the highest data rate demonstrated in the 7 GHz band of 60 GHz.
PMD tolerant direct-detection polarization division multiplexed OFDM systems with MIMO processing
(2012-03-26)
Wei, Chia-Chien
;
Lin, Chun-Ting
;
Wang, Chih-Yun
;
光電系統研究所
;
Institute of Photonic System
This work proposes a novel direct-detection polarization division multiplexed OFDM scheme without the need of dynamic polarization control at a polarization-diverse receiver, and the proposed scheme is robust against polarization mode dispersion. Setting the frequency difference between two polarization-orthogonal reference carriers as one subcarrier spacing, possible signal fading can be avoided, and the corresponding interference from adjacent subcarriers is eliminated by a novel MIMO algorithm. The penalty caused by high channel matrix condition number can be decreased by inserting empty tones among subcarriers, and the polarization-dependent OSNR penalty at the BER of 10(-3) is <3.6 dB with an empty tone inserted every 8 subcarriers. Moreover, the numerical results demonstrate the 16 x 10(3)-ps/nm chromatic dispersion and the 300-ps differential group delay will not induce additional penalty. (C) 2012 Optical Society of America
Study of Wireless Channel Characteristics of 2x2 60-GHz MIMO OFDM RoF System Employing Lattice Reduction-aided Detection
(2013)
Huang, Hou-Tzu
;
Ho, Chun-Hung
;
Lu, Tsung-Hung
;
Wang, Chih-Yun
;
Lin, Chun-Ting
We experimentally investigate the wireless channel characteristics of 2x2 60-GHz MIMO OFDM RoF system with 3.5-m wireless distance. With lattice-reduction-aided detection, the achievable data rate can be improved from 0.58Gbps to 12.61Gbps for the worst case.