tailieunhanh - Báo cáo hóa học: " Optical Wavelet Signals Processing and Multiplexing Gabriella Cincotti"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Optical Wavelet Signals Processing and Multiplexing Gabriella Cincotti | EURASIP Journal on Applied Signal Processing 2005 10 1574-1583 2005 Hindawi Publishing Corporation Optical Wavelet Signals Processing and Multiplexing Gabriella Cincotti Department of Applied Electronics University Rome Tre Via della Vasca Navale 84 00146 Roma Italy Email Michela Svaluto Moreolo Department of Applied Electronics University Rome Tre Via della Vasca Navale 84 00146 Roma Italy Email svaluto@ Alessandro Neri Department of Applied Electronics University Rome Tre Via della Vasca Navale 84 00146 Roma Italy Email neri@ Received 31 March 2004 Revised 1 February 2005 We present compact integrable architectures to perform the discrete wavelet transform DWT and the wavelet packet WP decomposition of an optical digital signal and we show that the combined use of planar lightwave circuits PLC technology and multiresolution analysis MRA can add flexibility to current multiple access optical networks. We furnish the design guidelines to synthesize wavelet filters as two-port lattice-form planar devices and we give some examples of optical signal denoising and compression decompression techniques in the wavelet domain. Finally we present a fully optical wavelet packet division multiplexing WPDM scheme where data signals are waveform-coded onto wavelet atom functions for transmission and numerically evaluate its performances. Keywords and phrases optical communication system wavelet transforms wavelet packet division multiplexing planar lightwave circuits optical signal processing. 1. INTRODUCTION Global communication networks infrastructure has been expanded thanks to recent advances in optical technology such as transparent photonic switches and ultra-long-haul transmission systems and the increase of multimedia data traffic is strengthening the demand for ultra-high-capacity photonic networks. The key feature of ultrafast optical networks is that the electrical conversion is avoided until data signals reach the most .