Tongyang Xu

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We propose and demonstrate a new optical spectrally efficient frequency division multiplexing (O-SEFDM) system, where non-orthogonal and overlapping sub-carriers are employed to provide higher spectral efficiency relative to opticalorthogonal frequency division multiplexing (O-OFDM). The O-SEFDM technique can increase spectral efficiency in both the(More)
This letter proposes a hybrid soft iterative method together with Fixed Sphere Decoding (FSD) concurrently optimize performance and complexity. We show that for bandwidth compression factors of up to 25 percent, we can achieve the same performance as Orthogonal Frequency Division Multiplexing (OFDM). For systems with bandwidth compression higher than 25(More)
Visible light communications is a technology with enormous potential for a wide range of applications within next generation transmission and broadcasting technologies. VLC offers simultaneous illumination and data communications by intensity modulating the optical power emitted by LEDs operating in the visible range of the electromagnetic spectrum(More)
Spectrally Efficient Frequency Division Multiplexing (SEFDM) is a non-orthogonal multicarrier communication technique that can pack more sub-carriers than Orthogonal Frequency Division Multiplexing (OFDM) in a given bandwidth. In this work, we propose a multi-band architecture named Block-Spectrally Efficient Frequency Division Multiplexing (B-SEFDM) for a(More)
A novel nonsubsampled contourlet Bi-linear interpolation algorithm for remote sensing image is proposed, which is based on the estimation of detail nonsubsampled contourlet coefficients at high resolution scales. The method employs Bi-linear interpolation algorithm to anticipate the high frequency component on high resolution from the high frequency(More)