Recently, ultra-wideband (UWB) technology based on the transmission of short duration pulses has gained much interest for its application to wireless communications. UWB small scale channel modeling work, including statistical characterization and potential models, are discussed. The significance, in terms of performance, of the channel impulse response model chosen for the simulation of UWB co...

This paper presents an ultra-wideband (UWB) low noise amplifier (LNA) using two stage cascading topology to obtain high gain. Inductive degeneration and peaking inductor techniques are used to obtain wideband matching and flatness of gain. The proposed UWB LNA is implemented by using 180nm based CMOS TSMC technology using Advanced Design System (ADS) software.LNA achieves maximum gain of 15.5dB...

MIMO techniques promise a significant boost in the capacity of wireless systems. In this paper, MIMO system is designed using a compact double-sided printed antenna having ultra-wideband and band-notched characteristic. The UWB antennas are designed on CST Microwave studio simulation software with return loss less than -10dB, and further using the results from CST, performance analysis of diffe...

Ultra-wideband (UWB) radio is a fast emerging technology with uniquely attractive features inviting major advances in wireless communications, networking, radar, imaging, and positioning systems. UWB radios offer great flexibility and shows enormous potential in view of future fourth generation (4G) broadband wireless access in dense multipath environments. In this paper jointly PHY and MAC lay...

In this paper, the suitabilities of direct sequence ultra wideband (DS-UWB) and ultra wideband frequency modulation (UWB-FM) are studied for medical applications. The system performances are studied by applying the measured hospital channels. The channel measurements were done at the Oulu University hospital in 2005. The measurement campaign included three different hospital environments, i.e. ...

An energy efficient ultra-wideband (UWB) transmitter based on the novel transmitted reference pulse cluster (TRPC) modulation scheme is presented. The TRPC-UWB transmitter integrates, namely, wideband active baluns, wideband I-Q modulator based up-conversion mixer, and differential to single-ended converter. The integrated circuits of TRPC-UWB front end is designed and implemented in the 130-nm...

Pulsed ultra-wideband (UWB) transceivers offer the potential for ultra-low-energy/bit operation because the signals are inherently duty-cycled. By eliminating components with long startup times, such as a phase-locked loop, all components in a pulsed-UWB transceiver can be disabled during the interval between pulses. This work focuses on an all-digital, pulsed-UWB transmitter that requires no a...

In February of 2002, the FCC approved the use of ultra-wideband (UWB) technology for commercial use. UWB has since been considered as a solution for the next generation of personal area networks (PANs) and wireless local area networks (WLANs). UWB (or impulse) radio employs short duration pulses to communicate, thereby spreading signal energy very “thinly” from DC to a few gigahertz [1]. The “u...

a fully integrated, ultra low-power, varying pulse width fifth-order derivative Gaussian pulse generator designed and fabricated in a commercial 0.18μm CMOS technology is reported for 3-10GHz impulse ultra wideband (UWB) transceivers. The fifth-order derivative Gaussian pulse generator circuit consists of four parallel Gaussian pulse formation blocks and an output stage. It can generate UWB pul...

In this paper, the significance of linearity for UWB front-end circuit is discussed. The effects of strong narrow band interferer on UWB signal are investigated. Wideband linearization techniques for UWB LNA are first proposed in this work. A high linearity UWB LNA is designed in TSMC 0.18μ CMOS process The simulation results show that the designed LNA exhibits very high IIP3 (6.9~13.8 dBm) whi...