Ultra-wideband radio signals distribution in FTTH networks

The use of an ultra-wideband (UWB) radio technique is proposed as a viable solution for the distribution of high-definition audio/video content in fiber-to-the-home (FTTH) networks. The approach suitability is demonstrated by the transmission of standards-based UWB signals at 1.25 Gb/s along different FTTH fiber links with 25 km up to 60 km of standard single-mode fiber length in a laboratory experiment. Experimental results suggest that orthogonal frequency-division-multiplexed UWB signals exhibit better transmission performance in FFTH networks than impulse radio UWB signals

Integrated performance analysis of UWB wireless optical transmission in FTTH networks

The optical transmission of full standard ECMA_368 OFDM_UWB signals 400 Mbit/s per single user over 50 km SSMF, and the impact of optical transmission in the radio performance experimentally analyzed in this paper

Photonic ultrawideband pulse generation with HNL-DSF-based phase and intensity modulator

We propose and experimentally demonstrate a photonic ultrawideband (UWB) pulse (monocycle and doublet) generator based on a highly nonlinear dispersion-shifted fiber (HNL-DSF). The pulsed pump, located in the anomalous group-velocity dispersion regime of the HNL-DSF, performs as both an intensity and a phase modulator in our scheme. We experimentally prove, for the first time to the best of our knowledge, that the UWB doublet pulse can be generated when the optical carrier is located at the center of a narrow tunable filter's passband. Furthermore, the encoded doublet signal, fully compliant with the Federal Communications Commission (FCC) regulations, is transmitted at 950 Mb/s through a 25-km single-mode fiber without introducing any obvious pulse distortion. © 2006 IEEE.published_or_final_versio

Optical frequency up-conversion of UWB monocycle pulse based on pulsed-pump fiber optical parametric amplifier

Optical Transmission Systems, Switching, and Subsystems VII, 2009; Asia Communications and Photonics Conference and Exhibition, ACP, 2009We propose a method to realize frequency up-conversion of UWB monocycle pulse using pulsed-pump fiber optical parametric amplifier (OPA). The spectrum of the amplified signal contains many discrete frequency components which are separated by the modulation frequency of the pump. Each frequency components contain the same spectral information as that of the original signal. By selecting the first-order or higher-order frequency components of the amplified signal and beating in the photodetector, up-converted signal at different frequencies are obtained. We demonstrate frequency up-conversion of baseband UWB monocycle pulse from 3-GHz to 19-GHz in the experiment and frequency up-conversion of pseudo-random binary sequence (PRBS) signal from 3-GHz to 60-GHz in the simulation. © 2009 SPIE-OSA-IEEE.published_or_final_versio

A Low-power CMOS 2-PPM Demodulator for Energy Detection IR-UWB Receivers

This paper presents an integrated 2-PPM CMOS demodulator for non-coherent energy detection receivers which inherently provides analog-to-digital conversion. The device, called Bi-phase integrator, employs an open loop Gm - C integrator loaded with a switched capacitor network. The circuit has been simulated in a mixed-mode UMC 0.18mum technology and its performance figures are obtained through a mixed-signal simulation environment developed with the aid of ADVanceMS (ADMS, mentor graphics). Bit-error-rate simulations show that the circuit performance is about the same of an ideal energy detection receiver employing infinite quantization resolution. In addition, the simulations show that the circuit provides a complete offset rejection. Thanks to its low power consumption (1 mW during demodulation), its application is appealing for portable devices which aim at very low-power consumption