Zhenshan Zhang

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In this paper, three basic intensity-modulated and direct-detected (IM/DD) fast orthogonal frequency division multiplexing (FOFDM) schemes are compared, including Flip-FOFDM, asymmetrically clipped optical FOFDM (ACO-FOFDM) and DC-offset FOFDM (DCO-FOFDM). The modulation/demodulation processing of FOFDM employs the discrete cosine transform. Compared with(More)
In this paper, we propose a coherent optical interleaved single-carrier frequency-division multiplexing (CO-I-SC-FDM) uplink scheme for the long-reach passive optical network (LR-PON). I-SC-FDM is a modified form of orthogonal frequency-division multiplexing (OFDM) with low computational complexity and low peak-to-average power ratio (PAPR). By designing a(More)
The effect of microwave (MW) pre-treatment on the extraction of flaxseed oil was investigated by hot extraction (HE). Nine MW pre-treatments were established, combining three MW radiation intensities (12, 18 and 24 W/g) and three MW radiation times of pre-treatment (90, 150 and 210 s). Extraction yield increased significantly with MW pre-treatments of(More)
The heat flow control is an important link in directional solidification. Mathematical model for unidirectional solidified ingot with multiple sets of cooling system was established. Temperature field and flow field influenced by traditional water-cooled stool and improved one during solidification of a 45 t was carried out by using ProCAST software. The(More)
Visible light communication (VLC) has recently emerged to become a promising wireless communication technology. It is attractive if the mobile phone camera can be used as the visible light communication receiver. In this paper, a feasible digital image processing scheme for the application of VLC using mobile phone camera as receiver is proposed. The camera(More)
With the popularity of mobile phone, the mobile-phone camera used as visible light communication (VLC) receiver is attractive. However, a mobile-phone-based VLC system suffers from a high extinction ratio (ER) fluctuation for high data rate, which effects the bit error rate (BER) performance, transmission distance, and data rate. In this paper, we propose(More)
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