The ultra-wideband (UWB) system, which transmits information using nanosecond or even sub-nanosecond pulses, has been widely applied in precise positioning. In this paper, we investigate the problem of time arrival (TOA) estimation and direction (DOA) UWB systems with antenna array propose a joint TOA DOA algorithm doubled frequency sample points extended number clusters. Specifically, proposed...

An easy-to-manufacture and efficient four-port-printed Multiple Input Output (MIMO) antenna operating across an ultra-wideband (UWB) region (2.9–13.6 GHz) is proposed investigated here. The phenomenon of the polarization diversity used to improve isolation between MIMO elements by deploying four orthogonal elements. printed (40 × 40 1.524 mm3) made compact optimizing circular-shaped radiating c...

ABSTRACT: The printed antenna is one of the best antenna structures, due to its low cost and compact design. In this paper, we present a new approach to improve the radiation effectiveness and the performance of antennas by miniaturization of the size. Indeed, we have studied the performance of ultra wideband antenna which consists of a ring-shaped patch. This study was made for the whole frequ...

This paper presents the design and realization of a compact printed ultra-wideband (UWB) antenna with notching characteristics for devices using genetic algorithm. The is capable mitigating an adjacent sub-band ranging from 3.75 to 4.875 GHz, mainly used by many applications standards such as WiMAX, WLAN sub-6-GHz. notch band functionality achieved etching out two symmetrical slots pentagonal r...

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...

Accurate wireless indoor positioning in non line-of-sight (NLoS) environments is an open research topic due to interfering dense multipath propagation. The key challenge is to reliably detect the direct path (DP) from the transmitter to the receiver so as to enable accurate positioning calculations. In our contribution a novel approach called ”BeamLoc” has been introduced to perform this task. ...

In practical situations such as hostage rescue, earthquake and other similar events, the ultra-wideband (UWB) life-detection radar echo response from respiration motion of trapped person is always quasi-/non-periodic in frequency or very weak amplitude, which can be called quasi-static vital sign. Although it an extremely difficult task, considering economic cost, detection ability traditional ...

Developing a cost-effective security system has been an important issue in crime prevention. Although cameras have been known as an effective candidate for this purpose, they have some downside, such as difficulty in accurately estimating the three-dimensional shape of a target, and the exact distance to a target [1], [2]. Ultra-wideband (UWB) pulse radar is an alternative for resolving these p...

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...

Ultra-wideband antenna with band notch for rejecting bands. Rectangular slots are introduced on an arborescent patch to get UWB, coverage from 3.1–10.6 GHz. The structure is fancied FR4 the substrate a size of 24 mm×24 mm×1.6 mm, located at 4.7 GHz generated by adding rectangular slot this microstrip simulated computer simulation technology, and manufactured results show wireless communication,...