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This paper demonstrates a high frequency power detector with high conversion gain for frequency-shift sensing applications used in biosensing systems. The proposed design comprises an amplitude-to-voltage convertor (AVC), a peak detector, and a bandgap. To increase the operating frequency range, AVC utilizes half of an RMS power detector to attain the power measure of an input signal. Since the input...
This paper describes a VLSI automatic quality control pitch detector circuit which can be used for detecting the identity of a unique bird. The detector is based on a previous VLSI model of the local gain control mechanism of the outer hair cells of the biological cochlea. This work presents characterization results from a 20-channel chip fabricated in a 4-metal 2-poly CMOS 0.35 μm technology with...
This paper focuses on the problem of single-channel noise reduction in a transient noise environment for speech enhancement application. A typical speech enhancement algorithm requires an estimate of the noise statistics. However, the problem of noise estimation is challenging when the statistics of the noise vary significantly with time. By exploiting the fact that for speech signal most of the energy...
This paper presents a new data-aided timing recovery algorithm for channels with data-dependent noise. Based on a data-dependent Gauss-Markov model of the noise, a maximum-likelihood timing recovery scheme is derived. The proposed timing recovery algorithm incorporates data-dependent noise prediction parameters in the form of linear prediction filters and prediction error variances. Moreover, because...
Progress in bio-printing techniques has accentuated the need for non-invasive imaging modalities with high sensitivity, high resolution, and imaging depth of a few millimeters. Mesoscopic Fluorescence Molecular Tomography (MFMT) is a promising imaging modality for 3D localization and quantification of fluorescent labeled cells in thick scaffolds. Here we report on the characterization of our second...
In this paper, the problem of cooperative spectrum sensing of cyclostationary signals for cognitive radios is considered. It has been shown that the MMSE optimal filters for cyclostationary signals involve one or more frequency shift branches and are called FRESH (FREquency SHift) filters. Adaptive FRESH filters have been used in the past to enhance cyclostationary signals so as to ease their detection...
Antenna coupled Infrared (IR) detectors attracted many authors for its promising room temperature operation, high speed, CMOS compatibility and low design complexity. Due to many factors, however, sever losses are introduced limiting the detectivity of these devices. One of the major sources of these losses is the substrate modes. We present for the first time a design simulation for a spherical reflector...
This paper introduces a high frequency power detector with high conversion gain for frequency-shift applications. The proposed design comprises an amplitude-to-voltage converter (AVC), a peak detector, and a bandgap. To increase the operating frequency range, AVC utilizes the half of an RMS power detector to attain the power measure of an input signal. Since the input power is converted to a DC voltage...
A successful OpenPET electronics system needs to provide electronics, especially front-end electronics that are powerful enough to accommodate cutting-edge research. While there are a tremendous number of variations, the relatively simple nature of the data ultimately collected implies that there can be a common set of requirements. In this paper, we describe a 32-channel high-performance Detector...
The challenges and issues related to the application in IEEE 802.11ac systems of lattice reduction (LR) techniques for the implementation of successive interference cancellation (SIC) receivers in single-user (SU) and multi-user (MU) orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO) transceivers are investigated in this paper. The shown simulation results, validated...
The paper investigates the performance of the energy detector in fading environments under the constraint, that each sensor has only a limited dynamic range. First, the effects which limit the dynamic of a sensor node are discussed before the influence on the energy detector is analyzed. Simulations are presented how cooperative spectrum sensing affects the detection probability and it is shown that...
This paper presents the design and implementation of an electronic front-end intended for spatial detection of ion beams at counting rates higher than 106 particles per second. The readout system is made up of three main multi-channel building blocks, namely: a transimpedance preamplifier, a signal-conditioning line receiver and a charge-to-digital converter, which are properly combined with some...
This paper introduces a novel class of linear soft-input soft-output detectors with boosted communications performance. The detector showed an SNR gain of up to 2.4 dB compared to state-of-the-art linear detectors. We introduce a low-complexity algorithm tailored for VLSI implementation, and propose a suitable architecture. The developed ASIC demonstrates the feasibility and efficiency of the concept,...
One way of performing indoor localization of objects is by means of Angle of Arrival (AoA). This technology is based on a phased antenna array which estimates the angle of arrival of an incident wave transmitted by a mobile node. This is achieved by measuring the relative phase shifts between the received signals. This paper presents the construction of a Phase Locked Loop (PLL) which synchronizes...
In this work the design and characteristics of an extended hemispherical dielectric lens applied to a non-planar antenna for the detection of THz radiation is presented. Antenna and lens behavior is numerically investigated in a large frequency range around the central frequency of 1 THz. Common printable materials widely characterized at THz range are used for the lens realization. Numerical results...
The TileCal Demonstrator is a prototype for a future upgrade to the ATLAS hadron calorimeter when the Large Hadron Collider increases its luminosity in year 2023 (HL-LHC). It will be used for functionality and performance tests. The Demonstrator has 48 channels of upgraded readout and digitizing electronics and a new digital trigger capability, but stays backwards compatible with the present detector...
A built-in calibration technique for radio-frequency low-noise amplifiers (LNAs) is presented in this paper. By means of two fully-integrated amplitude detectors, two transimpedance amplifiers (TIAs), a successive approximation register (SAR) controller, and a digital-to-analog converter (DAC), the gain of a LNA can be calibrated precisely by programming the ratio of on-chip resistance. By using a...
In the paper, a high-precision all-digital automatic gain control (AGC) algorithm for broadband real-time spectrum analyzer is proposed, which provides gain to weak signals, after the large signals and out-of-band noise have been filtered out, to ensure that weak signals have sufficient bit resolution, accuracy and quantization noise ratio in the output formatter. The effective mathematical analysis...
Broadband microwave receivers with electronic warfare applications often exhibit frequency variations that degrade performance. Most notably, a negative gain slope is inherent to an RF/Microwave receiver chain, in-part, because of attenuation that results from frequency-dependent ohmic losses in the dielectric. We present a novel approach to tunable gain slope equalization that solves this problem...
This paper presents a temperature compensated logarithmic amplifier (log-amp) RF power detector implemented in CMOS 0.18µm technology. The input power can range from −50 to +10 dBm for RF signals ranging from 100MHz to 1.5 GHz. This design attains a typical DR of 39 dB for a ±1 dB log-conformance error (LCE). Up to 900MHz the temperature drift is never larger than ±1.1 dB for all 24 measured samples...
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