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Recently finite-resolution digital receivers have been proposed for weighted-transmitted reference ultra-wideband (WTR-UWB) systems. However, employing a finite-resolution receiver severely degrades the performance due to a sever quantization noise. In this paper, two novel iterative algorithms are proposed to recover the reference pulse based on the detected data pulses and employing nonlinear signal...
This paper explains a methodology for beamforming of an ultrawideband signal (UWB). Tapped delay line (TDL) has been chosen as the beamformer structure and the channel environment considered is multipath and non line of sight in nature, compliant to IEEE 802.15.3a standards. The entire procedure for beamforming was done in the frequency domain owing to the nanosecond duration of ultrawideband pulses,...
An ultra-wideband (UWB) multistatic radar system, typically composed of one transmitter and several receivers, is a promising solution for tracking an intruder moving within a given surveillance area, because of its extraordinary localization accuracy and very low probability of intercept. In this paper, a new pixel-based localization approach using constant false alarm rate (CFAR) detector is proposed...
Wireless Body Area Networks (WBANs) offer coarse but stand-alone motion capture and navigation capabilities through peer-to-peer ranging and on-body nodes positioning, relying uniquely on transmitted radio signals and exchanged data packets. This paper accounts for new field experiments based on integrated ultra low power Impulse Radio − Ultra Wideband (IR-UWB) devices in the WBAN context. One first...
In this paper, we propose an efficient channel shortening algorithm, applied to OFDM systems, exploiting a particular decomposition of the Toeplitz convolution channel matrix and of the channel shortening filter (CSF). Unlike classical methods which optimize the CSF following one single criterion applied to the whole response of the filter, our decomposition allows for addition of complementary criteria...
In this paper, the integration of UWB and UHF technologies for RFID systems is investigated. A fast and energy efficient identification algorithm that makes use of UWB ranging is proposed for ISO/IEC 18000-6C tags. Compatibility with the standard, cooperation between the UHF and UWB technologies and solutions for asynchronism management are the main subjects of our analysis. Numerical results show...
This paper presents a rigorous millimeter-wave spectral domain approach for an efficient analysis of asymmetric coupled microstrip-type structures on anisotropic multilayered substrates. A suitable choice of basis functions with metallic edge effects is proposed via the Galerkin's procedure. This technique leads to faster and accurate characterization with simulated results successfully compared with...
Using UWB for wireless short range, low rate communication is attracting growing interest due to its low power consumption and very high bandwidth. Regarding these qualities, it is comprehensible that there is an interest in the automation industry to use ultra wideband based wireless sensor nodes to replace wired systems, to save energy and to save costs without reducing the reliability of the whole...
A fast and accurate radar imaging algorithm is proposed that is a hybrid of the Kirchhoff migration and Stolt's frequency-wavenumber (F-K) migration. The latter is known as a fast imaging method in the F-K domain using the fast Fourier transform. Kirchhoff migration is reported to be more accurate than Stolt's F-K migration, but requires locating reflection points. For this reason, Kirchhoff migration...
For the goal of an Object Recognition (OR) Radar system, a feature extraction algorithm is proposed in this paper. Conventional radar imaging method based on Kirchhoff Migration and the revised range point migration method are known to obtain fast and accurate images. However, these methods are not suitable for feature extraction as the Kirchhoff Migration method processes the whole evolution of the...
In this paper, we investigate the performance of a 3D-printed plastic lens operating in the 120 GHz frequency band. An Integrated Passive Device module with built-in linearly polarized patch antenna is used as the source of the lens. The profile of the lens is based on elliptical shape. It is first optimized with Geometrical Optics (GO) and Physical Optics (PO) methods. Then, full-wave simulations...
This paper describes a method of human being detection that involves eigenvalue estimation and analysis. This is a tag-free live human body detection method that looks for small changes in the reflected Ultra Wideband (UWB) signals in an indoor environment. As chest movement of the human body leaves a distinguishable effect on the reflected UWB signal hence it is an observable and detectable phenomenon...
Generalized frequency division multiplexing (GFDM) is a new flexible multicarrier waveform. With the flexibility of pulse shaping techniques and a tail-biting cyclic prefix, it has very low out of band leakage. This makes this potential 5G waveform suitable for cognitive radio opportunistic access with lower interference to the adjacent legacy/primary users. Because of the per-subcarrier pulse shaping...
Experimental evaluation of ultra wideband (UWB) wireless transmission was carried out with a view to replacing wired interface buses in spacecrafts. Application of wireless technologies within the spacecrafts could contribute to reduction in cable weight; reduction in the cost of design, manufacture, and test; more flexibility in layout of spacecraft subsystems; and reliable connections at rotary,...
This work proposes a novel framework for the organization and the management of a mobile cognitive radio network, focusing on the network performance in terms of cooperative spectrum sensing and data throughput. It relies on cooperation between secondary devices, that organize themselves in clusters defined according to both spectrum sensing reliability and mobility behavior of each secondary user...
This paper describes a monolithic integrated single-chip transceiver intended for impulse radio (IR) — Ultra-wide Band (UWB) applications compliant to the IEEE 802.15.4a standard. The transceiver operates in the higher UWB band on four different channels, which fit into the European spectral mask (defined by the ECC). In accordance to the standard, several data rates up to 27.24 MB/sec have been implemented...
In this paper, we perform comparative cost-capacity analysis of the heterogeneous wireless networks deployed in separate 4G cellular micro-wave bands, Wi-Fi 5 GHz band and 5G 28 GHz cellular millimeter-wave band. We consider the standardized Long Term Evolution Release 10 and 11 and IEEE 802.11ac, alongside with the forthcoming radio access technology to be utilized by the millimeter-wave systems...
Dual Carrier Modulation (DCM) is widely used as the higher data rate modulation technique for Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) Ultra Wideband (UWB) in European Computer Manufacture Association (ECMA-368) standard. DCM is one of the high data rate modulation technique that provides a significant frequency diversity improvement by modulating the information symbols across...
For many modern communication and measurement systems, continuous signals of wide bandwidth are required. Maximum length sequences generated in linear feedback shift registers are a proven way to generate signals meeting these criteria. We present a number of discrete implementations that allow signal generation in both laboratory andbproduction environments with higher flexibility and lower initial...
A digital baseband was designed and implemented according to the standard IEEE802.15.4a both in FPGA and as well as ASIC. The baseband supports data rates 850 Kb/s, 6.81 Mb/s and 27.24 Mb/s running at the clock speed of 31.2 MHz. The transmitter and receiver were tested by introducing various distortions to the signal being received. The baseband was shown to be fully functional being able to receive...
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