Browsing by Author "Chiang, Ya-Tang"

Now showing 1 - 3 of 3

Simple 2 x 2 MIMO 60-GHz Optical/Wireless System With Extending Fiber Transmission Distance
(2014-10-15)
Huang, Hou-Tzu
;
Lin, Chun-Ting
;
Chiang, Ya-Tang
;
Wei, Chia-Chien
;
Ho, Chun-Hung
This paper presents a simple 2 x 2 multiple-input multiple-output (MIMO) 60-GHz radio-over-fiber system. Due to the proposed specific frequency arrangement of driving signals, each optical transmitter requires only a single-drive Mach-Zehnder modulator with 3-dB bandwidth of less than 35 GHz. This arrangement of frequencies can increase the tolerance of optical signals to dispersion-induced RF fading, thereby extending fiber transmission distance. Unfortunately, this scheme leads to signal-to-signal beating interference (SSBI), which can deteriorate system performance. Thus, we employed a 2 x 2 MIMO scheme to enhance data capacity by combining two data streams and two corresponding SSBIs prior to signal demodulation. We also developed a novel iterative equalization technique to mitigate SSBI in the MIMO system. The proposed system achieved a maximum capacity of 55.9-Gb/s in the transmission of 7-GHz orthogonal frequency division multiplexing signals over 12-km fiber and 3.5-m air transmission using a bit-loading algorithm.
Simple 2x2 MIMO 60-GHz OFDM RoF System with Single-Electrode MZMs Employing Beating Interference Mitigation and IQ Imbalance Compensation
(2013)
Huang, Hou-Tzu
;
Chiang, Ya-Tang
;
Lin, Chun-Ting
;
Wei, Chia-Chien
;
Ho, Chun-Hung
We propose simple 2x2 MIMO 60-GHz RoF systems using single-electrode MZMs. Employing signal-signal beating interference mitigation, IQ imbalance compensation, and bit-loading technique, >40-Gbps OFDM signals over 12-km fiber and 3.5-m wireless transmission are achieved.
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.