Ultra-wideband (UWB)system communicates with a base-band signal composed of sub-nanosecond pulses (referred to as monocycle). A new monocycle shape based on wavelet is presented whose spectrum meets the Federal Communication Commission (FCC) spectral mask. In many literatures, it is usually assumed that the synchronization has been achieved between the receiver and the transmitter, actually it ...

In this paper, a range difference estimation technique with NLOS error mitigation by using biased Kalman filter for ultra-wideband (UWB) environments is presented. NLOS error is considered one of the major error sources in wireless location systems. To improve TDOA location accuracy in UWB location systems, NLOS identification and mitigation techniques suitable for UWB systems are derived. Kalm...

This paper presents a low-cost Ultra Wideband (UWB) pulse generator that can vary the pulse duration digitally by using a Step Recovery Diode (SRD), microstrip transmission lines and PIN diodes. First, a sharp edge is generated by using a SRD circuitry. Then a pulse is formed from the sharp edge through the use of transmission lines and the PIN diodes. Based on the number of transmission lines ...

A novel ultra-wideband (UWB) bandpass filter (BPF) with notched band based on microstrip/slotline ring resonators is presented in this paper. The UWB BPF is fabricated with two microstrip ring resonators on the top copper layer and a slotline ring resonator on the bottom ground layer. Thus, an ultra-wide passband can be achieved owing to the coupling effects and microstrip/slotline transitions ...

The ultra wideband (UWB) radio has been a promising technology for the short range wireless systems. The frequencydependent behavior of the antennas are not negligible in UWB systems, especially in the impulse radio (IR). This letter presents the extension of the Friis’ transmission formula for the link budget estimation of UWB radio, considering the transmit signal waveform and the imperfect a...

The capacity of time-hopping pulse position modulation (PPM) and pulse amplitude modulation (PAM) for an ultra-wideband (UWB) communication system is investigated based on the multipath fading statistics of UWB indoor wireless channels. A frequency-selective fading channel is considered for both single-user and multiple-user UWB wireless systems. A Gaussian approximation based on the single-use...

© 2013 Jung-Nam Lee et al. 1075 http://dx.doi.org/10.4218/etrij.13.0113.0472 This paper describes an ultra-wideband (UWB) antenna that uses a ring resonator concept. The proposed antenna can operate in the entire UWB, and the IEEE 802.11a frequency band can be rejected by inserting a notch stub into the ring resonator. The experiment results indicate that the measured impedance bandwidth of the...

In this paper we study the information theoretic capacity of Pulse Position Modulation (PPM) Ultra Wideband (UWB) communications for single user channels. The capacity is studied with a link impulse response with delay spread and Inter Pulse Interference (IPI). The objective is to consider the effect of IPI on capacity and quantify the capacity with IPI. An expression for the signal-tonoise rat...

This paper presents a fully integrated all-digital ultra-wideband (UWB) transmitter. All functional blocks in the transmitter are implemented with digital standard cells and automatically placed-and-routed (APR-ed) by design tools. The center frequency and the bandwidth of the UWB pulses are digitally tuned to compensate for variations, and a calibration scheme utilizing APR mismatch is explore...

A distributed waveform generator is presented for sub-nanosecond pulse generation in UWB impulse radios. It timeinterleaves multiple digital pulse generators, and uses an on-chip transmission line for wideband pulse combining. Compared to other UWB pulse generation and shaping solutions, it is low power and fully reconfigurable. A 10-tap, 10GS/s prototype was implemented in standard digital CMO...