نتایج جستجو برای: detector

تعداد نتایج: 58684  

Journal: :رادار 0
معین احمدی کمال محامدپور محمد علایی محمدعلی سبط

in this paper, the detection of moving targets in airborne widely separated phased multiple input multiple output (mimo) radars which are located on moving platform is investigated. in order to derive the detector, the generalized likelihood ratio test is applied. the proposed detection rule, exploits the clutter subspace information and its maximum likelihood estimation, to improve the detecti...

The present study was designed to develop a simple, validated liquid chromatographic method for the analysis of azithromycin in bulk and pharmaceutical dosage forms using ultraviolet detector. The best stationary phase was determined as C18 column, 5 µm, 250 mm × 4.6 mm. Mobile phase was optimized to obtain a fast and selective separation of the drug. Flow rate was 1.5 mL/min, Wavelength was se...

The present study was designed to develop a simple, validated liquid chromatographic method for the analysis of azithromycin in bulk and pharmaceutical dosage forms using ultraviolet detector. The best stationary phase was determined as C18 column, 5 µm, 250 mm × 4.6 mm. Mobile phase was optimized to obtain a fast and selective separation of the drug. Flow rate was 1.5 mL/min, Wavelength was se...

Journal: :Journal of biomedical optics 2007
Xinmai Yang Lihong V Wang

We image a rat cerebral cortex in situ by using a ring-based ultrasonic virtual point detector developed previously. Compared to the image generated by a finite-aperture detector, the image generated by the virtual point detector has a uniformly distributed resolution throughout the imaged area, owing to the lack of aperture effect of the ultrasonic detector. At the periphery of the image, the ...

A.R. Khoshbin Khoshnazar, M.T. Bahreyni Toossi,

Background: Radiosurgery is a focal brain irradiation technique that delivers, usually in a single session, high dose of ionizing radiation. The presence of lateral electronic disequilibrium and steep dose gradients in small fields demands special attention to the selection of a suitable detector with respect to its size, composition and response. Materials and Methods : Small circular fields w...

Journal: :EURASIP J. Adv. Sig. Proc. 2002
Xiaodong Cai Hongya Ge Ali N. Akansu

We first develop a reduced-rank minimum mean square error (MMSE) detector for direct-sequence (DS) code division multiple access (CDMA) by forcing the linear MMSE detector to lie in a signal subspace of a reduced dimension. While a reduced-rank MMSE detector has lower complexity, it cannot outperform the full-rank MMSE detector. We then concentrate on the blind reduced-rank MMSE detector which ...

2009
Jungwon Lee Dimitris Toumpakaris Hui-Ling Lou

The detection problem in the Gaussian interference channel is addressed, when transmitters employ non-Gaussian schemes designed for the single-user Gaussian channel. A structure consisting of a separate symbol-by-symbol detector and a hard decoder is considered. Given this structure, an optimal detector is presented that is compared to an interferenceunaware conventional detector, an interferen...

Journal: :Signal Processing 2000
Hong Gil Kim Iickho Song Sun Yong Kim Jooshik Lee

In this paper, we propose to use a new nonparametric noncoherent detector for PN code acquisition in DS/CDMA systems. Because this detector is nonparametric, we can decide the threshold of the detector without "rst having to estimate the variance of time-varying interference. We compare the single-dwell scheme using the proposed detector with that using the conventional detector. From the simul...

Journal: :Optics Express 2021

Superconducting nanostrip photon detectors have been used as single detectors, which can discriminate only photons' presence or absence. It has recently found that they the number of photons by analyzing output signal waveform, and are expected to be in various fields, especially optical quantum information processing. Here, we improve photon-number-resolving performance for light with a high-a...

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