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A simple low-sampling-rate receiving scheme is proposed for W-band OFDM-RoF systems. Using the proposed preprocess, aliasing-free subcarriers can be received, and employing the optimized delays to ADCs can achieve the performance insensitive to sampling rate.
We experimentally demonstrate a 50-Gbps PDM-OFDM system with a direct-detection BLAST-aided receiver. Without dynamic polarization tracking, the PDM-OFDM system can achieve BER of 10-3 over all possible SOP with <;2.8-dB difference of OSNR requirement.
We experimentally demonstrate WDM-VLC employing CAP modulation and commercially available RGB-type LED. The record aggregate data rate of 3.22 Gb/s with the BER of less than 10-3 is successfully achieved over >25-cm air-transmission.
We demonstrate 1.1-Gb/s visible light communication (VLC) employing carrier-less amplitude and phase modulation (CAP) and a commercially available phosphorescent white light emitting diode (LED). Optical blue filtering, precompensation, and decision feedback equalization are used to compensate the frequency response of the phosphor-based white LED. Various modulation orders of CAP signals are investigated...
We demonstrate a 40-Gb/s OFDM radio-over-fiber system with 10-m wireless distance at 60-GHz by employing simple IM-DD modulation with DSP-based bit-loading and I/Q imbalance compensation. Spectral efficiency of 6-bit/s/Hz was achieved with BER of 9×10−4.
Generation and transmission of a 4-Gb/s electrical single-sideband single carrier QPSK signal within 2-GHz bandwidth in a 60-GHz Radio-over-Fiber system are experimentally demonstrated. After transmission over 50-km single-mode fiber, a negligible power penalty is observed.
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.
For OFDM RoF systems at 60-GHz band, dispersion-induced phase noise (PN) could heavily degrade transmission performance. We propose an algorithm to suppress PN and experimentally demonstrate the algorithm can extend the transmission distance by >;60%.
In this paper, we apply simulation-based optimization methods to detect quadrature amplitude modulated (QAM) MIMO signals. The first one is the so-called Cross-Entropy (CE) method which enables the corresponding CE-based detector to provide bit-error-rate (BER) performance close to that achievable by the maximum-likelihood (ML) detector when the signal-to-noise ratio (SNR) is relatively low. Unfortunately,...
A simultaneous extinction-ratio enhancement and light reuse scheme was proposed for RSOA-based WDM-PONs to enhance 10/1.25-Gbps downstream and upstream transmissions. This scheme greatly reduces the power penalty for both downstream and upstream transmissions.
We proposed RF direct-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.
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