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We propose and experimentally demonstrate a novel channel-independent multi-band orthogonal circulant matrix transform (MB-OCT) precoding, to efficiently combat the severe frequency-selective fading induced by the limited modulation bandwidth of visible light communication (VLC). The proposed MB-OCT precoding exhibits ladder-like signal-to-noise-ratio (SNR) profile, thus significant BER reduction...
A bend-insensitive wideband multimode fiber has been fabricated via PCVD process. The fiber is designed to support four SWDM channels at speeds of over 25 Gb/s between 850 nm and 953 nm to realize a 150 meters transmission link at least.
We present a simple and low-cost method for estimating the symbol error rate (SER) and bit error rate (BER) for 4-ary pulse amplitude modulation (PAM-4) signals from the reconstructed eye diagrams obtained by using asynchronous sampling technique. The reconstructed PAM-4 eye diagram is divided into three separate sub-eyes. The optimal sampling position of the signal phase is obtained by overlapping...
In this paper, we mainly focus on the optimization of multi-level coded modulation scheme in terms of sub-channel code rate optimal assignment and irregular QC-LDPC code construction with the aid of EXIT chart analysis. Simulation results show that the proposed MLCM scheme can achieve additional 0.1dB NCG compared with the UEP coded modulation scheme.
In this paper the time-slot coding scheme is experimentally demonstrated using imaging receiver to provide multiple access for indoor optical wireless communications. The system capacity of 8 Gb/s is achieved for up to 12 users.
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