نتایج جستجو برای: noise performance

تعداد نتایج: 1201599  

Journal: :IEEE Trans. on Circuits and Systems 2015
Mark Stoopman Yao Liu Hubregt J. Visser Kathleen Philips Wouter A. Serdijn

The aim of this brief is to point out the importance of co-designing electrically-short antenna-electronics interfaces as a way to improve the system performance. This can be achieved if both the antenna and electronic circuit designer have a common optimization target. In this brief, the co-design principles are presented for antenna systems in the receiving mode, which includes reception of w...

2006
M. K. Simon

The tracking (mean-square timing-error) performance of a linearized datatransition tracking loop (LDTTL) is presented. The difference between the LDTTL and the conventional DTTL is that the hard-limiter nonlinearity in the conventional DTTL’s inphase arm is replaced by a linear device, as suggested by the maximum a posteriori (MAP) open-loop estimate of symbol timing at low symbol signal-to-noi...

2010
R. Vanithamani G. Umamaheswari

Speckle is a random multiplicative noise which obscures the perception and extraction of fine details in ultrasound image and despeckling is necessary to improve the visual quality for better diagnoses. Preliminary treatment of images before segmentation and classification includes despeckling as one of the important steps. This paper aims at introducing the possible range of image speckle corr...

2005
Thibault Damour Bala R. Iyer

We compare the performances of the templates defined by three different types of approaches: traditional post-Newtonian templates (Taylor-approximants), “resummed” post-Newtonian templates assuming the adiabatic approximation and stopping before the plunge (P-approximants), and further “resummed” post-Newtonian templates going beyond the adiabatic approximation and incorporating the plunge with...

2016
Hamid Eghbal-zadeh Gerhard Widmer

In music information retrieval (MIR), dealing with different types of noise is important and the MIR models are frequently used in noisy environments such as live performances. Recently, i-vector features have shown great promise for some major tasks in MIR, such as music similarity and artist recognition. In this paper, we introduce a novel noise-robust music artist recognition system using i-...

2001
Mario Rafael Hueda Carlos A. Marqués

We present a simple and accurate semi-analytic methodology for performance evaluation of wireless video transmission in multicode DS-CDMA (MC-CDMA). Based on the novel approach (as well as on entire system simulations), we analyze performance of H.263 in an IS-95B system over slow fading channels at low bit rates. Peak signal-to-noise ratio (PSNR) values for various video test sequences demonst...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده نقشه برداری 1389

بازیابی میدان جاذبه زمین در مقیاس جهانی به صورت ضرایب هارمونیک کروی با استفاده از مشاهدات ماهواره های اختصاصی ثقل سنجی، به روش های مختلفی صورت می گیرد. برای بازیابی از روش اندازه گیری شتاب و روش انتگرال انرژی استفاده شده است. در این دو روش، محاسبه بردار شتاب و سرعت ماهواره برای بازیابی میدان جاذبه با استفاده از روش های مشتق گیری عددی ضروری می باشد. روش های مشتق گیری نیوتن، اسپیلاین و تیلور و فو...

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