UWB-Over-Fiber Communications: Modulation and Transmission

Integrated 16-ps Pulse Generator Based on a Reflective SOA-EAM for UWB Schemes

“…Although versatile and functional, since the UWB spectrum range was regulated by the Federal Communications Commission (FCC) to be allocated between the 3.1 and 10.6 GHz band with a power spectral density of -41.3 dBm/MHz [3], there is a tradeoff between the achievable data rate and coverage area. In order to meet this requirement and increase the transmission Manuscript distance, Ultrawideband over Fiber (UWBoF) has emerged as a solution based on merging this wireless technology and Microwave Photonics (MWP) not only for signal distribution [4], but also for signal generation purposes. The pulse shapes that are directly generated within the optical domain [5][6][7] are based on high order derivatives of the Gaussian pulse so they can meet the standard requirements.…”

High order UWB pulses generation based on a scalable phase-to-intensity technique

“…Several techniques to generate modulate and distribute UWB pulses have been proposed 3 , not only to increase the scope of coverage area but also to provide undisrupted service across different networks. Generating directly in the optical domain avoids any extra electrical to optical conversion.…”

Photonic generation of background-free millimeter-wave ultra-wideband signals (Invited Paper)

“…The Federal Communications Commission (FCC) defined the UWB signal as a radio frequency (RF) signal that occupies a spectral bandwidth of more than 500 MHz or more than 20% fractional bandwidth with a power density no more than −41.3 dBm∕MHz [2] . Up to now, various approaches have been proposed to generate UWB signals in the centimeter-wave (CMW) band (3.1 to 10.6 GHz) for indoor communications [3][4][5][6][7] and in the millimeter-wave (MMW) band (22 to 29 GHz) for outdoor communications [8][9][10][11][12][13][14][15][16][17][18][19] . In this Review, we review recent progress on the photonic generation of UWB signals in the MMW band with emphasis on the generation of background-free and FCC compliant MMW-UWB pulses.…”

“…As a result, the signal is significantly weakened and the generated UWB signal is power-inefficient [19] . It is known that the main limitation of the UWB technology is the limited transmission distance, which is around 10 m. In order to extend the transmission distance and to overcome the limitation of the electrical mixerbased approach, photonic generation of the UWB signal as well as UWB-over-fiber has been proposed [3,4] . Photonic frequency upconversion, which is similar to the electrical method, has been widely used for MMW-UWB signal generation.…”