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This paper discusses a multi-user access technique for Ultra-wideband Impulse Radio (UWB-IR) system in energy detection receiver. The UWB-IR system is modulated by On-Off shift Keying (OOK). As multi-users access scheme, the Code Division Multiple Access (CDMA) using the Optical Orthogonal Code (OOC) sequence is adopted. The integral interval and the sample energy threshold value are optimized to...
This paper discusses Inter-symbol Interference (ISI) cancellation technique and the optimized energy detection receivers in ultra-wide-band impulse radio (UWB-IR) systems. As schemes of optimizing receivers, the integration interval and the sample energy threshold value are investigated. And, ISI cancellation depends on decision feedback equalization (DFE) is used. The performances are evaluated by...
This paper describes a 500-Mb/s 12-mW pulsed UWB transceiver in 1.8-mum CMOS technology for sub-meter short-range wireless communication. The transceiver employs two functional blocks for reducing power dissipation: one is an on-chip transformer-based DC-RF pulse power converter and another is an asynchronous RF-baseband direct demodulator. The prototype chip with printed dipole antenna can operate...
The world's fastest BB84 QKD through a 97-km installed fiber was demonstrated using PLC-based interferometers, SSPDs and WDM synchronization. By suppressing nonlinear crosstalk induced by the multiplexed clock, QBER of 2.8% was obtained after 97-km transmission.
We experimentally demonstrate a new scheme for the discrimination of binary-encoded optical coherent states. We show that the average error probability of our approach beats the ones obtained by standard receiver schemes for any signal amplitude.
We report an entanglement-based BBM92 quantum key distribution experiment using superconducting single photon detectors. A 16-kbit sifted key with a quantum bit error rate of 6.9 % was successfully generated after 100 km fiber transmission.
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