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The discrimination of alcoholic and normal person using electroencephalogram (EEG) signal is a challenging task in the field of biomedical research. To solve this task, this research work uses Empirical mode decomposition (EMD) method for the discrimination of alcoholic and normal person using EEG signal. The EMD is very useful method to deal with non-linear and non-stationary EEG signals, it decompose...
Advanced wireless radio standards set stringent requirements on the bandwidth, frequency range and reconfigurability of base-station transmitters. Recently, the outphasing concept has shown promise of wide bandwidth while taking advantage of process scaling with extensive exploitation of rail-to-rail signaling. Recent outphasing transmitter designs have often focused on power-amplifier (PA) and power-combiner...
A channel measurement campaign was carried out in Berlin, Germany, aiming to provide multi-frequency data for the urban microcellular (UMi) access channel in the street canyon. Four bands (10.25, 28.5, 41.5 and 82.5 GHz) were measured simultaneously. In this paper, statistical evaluations on the frequency dependence of the root-mean-square delay spread (DS) under line of sight (LOS) conditions are...
Future communication systems will utilize multiple antennas and beamforming to a larger extent than what has been done before. Design and evaluation of systems with many antennas and large bandwidth requires channel models with good accuracy in angle and delay. An angular resolution down to one degree, and bandwidths of several GHz, are foreseen for the future 5G wireless systems. For this purpose,...
This paper investigates the large scale parameters (LSPs) of wireless channels with measurements at frequencies of 7.5 GHz, 28 GHz and 73 GHz for indoor light-of-sight (LOS) and non-light-of-sight (NLOS) scenarios. Comparison of the measured LSPs (RMS-DS, ASA, ESA) of these channels at different frequencies shows some differences between high and low frequency measurements. These studies indicate...
We propose a spherical ultra-wideband antenna based on the self-complementary structure. The antenna employs a loop comprising of two symmetric teardrop shaped arms conformally printed on a three-dimensional sphere. To enhance the impedance matching bandwidth, the capacitive and inductive loading techniques are applied by broadening the antenna's front part and adding shorting strips at the rear part,...
In this paper, a dual-orthogonal polarized Vivaldi antenna with high port isolation is presented. The dual-polarized antenna structure is achieved by inserting two orthogonal Vivaldi antennas in a cross-shaped form without a galvanic contact. To satisfy the low-end bandwidth requirements and improve the radiation characteristics in the lower frequencies, a novel exponential tapered slot edge (ETSE)...
This paper presents the design of a wide-band frequency quadrupler in the 240 GHz frequency regime fabricated in a 0.13 μm SiGe BiCMOS process. Frequency multiplication is performed in two stages: in the first stage, two push-push doublers with quadrature input double the input frequency and in the second stage, a bootstrapped Gilbert-cell doubler delivers quadrupled signal at the output. A Marchand...
This paper introduce design, implementation and measurement of front end crystal video receiver (CVR) that operates in the frequency range of 8–10 GHZ to intercept short duration pulse radar signals. The proposed receiver is designed with two outputs, video signal for real-time signal processing and an amplified version of the received signal for frequency measuring and/or determine the presence of...
Artificial Magnetic Conductors (AMCs) design and characterization in the UHF band is a big challenge while realizing low-profile antenna. In fact, AMCs unit cell often balance large geometries with high dielectric constants to achieve the desired frequency target while maintaining a minimal thickness. A compact AMC unit cell achieving a 37% reduction in the largest dimension (or 60% of surface reduction)...
The most important characteristic of a multipath radio channel is its impulse response. For wideband radio channels in the lower part of the THz-band (Low-THz, 300 GHz–1 THz), the coefficients of this characteristic depend on the frequency, and are determined by the phase changing of the primary and delayed rays, and the variance of the reflection coefficients of electromagnetic waves. In this work...
A multi-resolution technique is presented for sound field recovery based on measurements of one or multiple moving microphones. The interpolation of the spatial samples enables us to set up a system of linear equations that recovers room impulse responses on a virtual uniform grid in space. The spacing of the virtual grid must be very small when directly recovering for the entire bandwidth, thus,...
In this paper, origami antennas are proposed for military field deployment. A high gain tetrahedron origami antenna (antenna #1) is introduced and then extended to circularly polarized antenna (antenna #2) for military satellite applications. Both the antennas are realized on paper substrate by using origami tetrahedron structure. The radiating aperture of antenna #1 comprises a triangular shaped...
A reference-free stochastic ADC is proposed by utilizing both spatial averaging and oversampling noise-shaping schemes. By implementing multiple VCO-based quantizers in parallel, stochastic spatial averaging for quantization errors is inherently obtained. In addition, 1st-order noise shaping of a VCO-based quantizer is achieved in an open-loop oversampling configuration. By resolving a faster conversion...
This paper presents the robust characterization of nonlinear microwave devices driven by broadband modulated multi-sine stimuli by using a refined multi-tone waveform measurement system. The substantial contribution comes from the capability of the measurement system to measure and average the time domain waveforms of adjacently modulated signals on a similar time scale for different modulation frequencies...
The paper presents a novel uniplanar integrated filtering dipole with a second-order filtering response of enhanced frequency selectivity. The first stage of the filter is a U-shaped half-wavelength resonator, whereas the second one is the planar dipole antenna. The bandwidth of the dipole is controlled by the edge coupling between the two stages. The U-shape resonator also acts as a balun. A truncated...
Universal Software Radio Peripheral (USRP) and GNU Radio are well known Software Defined Radio (SDR) tools. The USRPs designed by Ettus Research are used without a deep knowledge of their performances. In this paper, we report our output power measurements using a USRP B210 driven by a GNU Radio program. Our results show that the obtained output power decreases as the selected central frequency increases...
The implementation of a 64x time-interleaved ADC in 32nm CMOS SOI is analyzed. Measurement results confirm 33 dB SNDR up to 19.9 GHz at 90 GS/s and 1.2V supply. Architecture details and analysis show insights into limitations and potentials of the chosen architecture. In par-ticular the input bandwidth is of concern for ADCs at more than 64 GS/s, as a larger number of sampling switches in-creases...
We present power amplifier ICs with a small-signal measured 3dB-bandwidth spanning from 24 GHz to 114 GHz, implemented in a 130 nm InP HBT process. The PAs were designed using sub-quarter wavelength transmission-line baluns for output matching and series power combining. The small signal gain is 15 dB and the DC power consumption is 800 mW in low power operation. The measured output power at 3-dB...
This paper represents an ultra-wide band low noise amplifier (LNA) that stands out for it high degree of simplicity, small size, extremely low power consumption and impressive broadband performance. Smart choice of topology, device scaling and Active Impedance Matching Technique enabled a good broadband matching off the amplifier. The measured performance featuring 10.2 dB transducer gain with -3...
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