نتایج جستجو برای: linear frequency modulation nlfm

تعداد نتایج: 1063936  

2005
Daniel Nordin Kalevi Hyyppä

Daniel Nordin Kalevi Hyyppä Luleå University of Technology EISLAB SE-971 87, Luleå, Sweden E-mail: [email protected] Abstract. The lasing wavelength of a single-section distributed feedback DFB laser diode can be modulated by modulating the drive current. This makes it possible to utilize the DFB laser diode in a frequencymodulated continuous wave FMCW range and velocity measuring system...

The accuracy of target position detection in IR seeker depends on the accuracy of tracking error signal (TES) extraction from seeker Field of View (FOV). The type of reticle inside the seeker determines the output modulation signal that carries the TES. In this paper, the stationary wagon wheel reticle is used, which makes the type of the output signal as FM modulation in the linear region of F...

2001
Shmuel Ben-Yaakov Stanislav Glozman

SPICE-compatible equivalent circuits were developed to facilitate the analysis and envelope simulation of electric circuits driven by modulated signals. The circuits are based on a novel complex phasor-domain transformation. The proposed method facilitates simulation of any general linear circuit driven by a modulated signal such as amplitude modulation, frequency modulation, or phase modulatio...

Journal: :The Journal of the Acoustical Society of America 2016

Journal: :Optics letters 1984
B Y Kim H J Shaw

An open-loop, all-fiber-optic gyroscope with wide dynamic range and linear scale factor is described. This novel approach converts the Sagnac phase shift into a phase shift in a low-frequency electronic signal by using optical phase modulation followed by amplitude modulation verify the theoretical predictions.

Journal: :IEEE Trans. Automat. Contr. 2002
Joon-Young Choi Miroslav Krstic Kartik B. Ariyur Jin Soo Lee

We present an extremum seeking control algorithm for discrete-time systems applied to a class of plants that are represented as a series combination of a linear input dynamics, a static nonlinearity with an extremum, and a linear output dynamics. By using the two-time scale averaging theory, we derive a mild sufficient condition under which the plant output exponentially converges to an ( ) nei...

Journal: :EURASIP J. Adv. Sig. Proc. 2017
Xiurong Ma Dan Liu Yunlong Shan

Intra-pulse modulation recognition under negative signal-to-noise ratio (SNR) environment is a research challenge. This article presents a robust algorithm for the recognition of 5 types of radar signals with large variation range in the signal parameters in low SNR using the combination of the Short-time Ramanujan Fourier transform (ST-RFT) and pseudo-Zernike moments invariant features. The ST...

2012
John Wyrwas John Michael Wyrwas

Linear, Low Noise Microwave Photonic Systems using Phase and Frequency Modulation by John Michael Wyrwas Doctor of Philosophy in Engineering Electrical Engineering and Computer Sciences University of California, Berkeley Ming C. Wu, Chair Photonic systems that transmit and process microwave-frequency analog signals have traditionally been encumbered by relatively large signal distortion and noi...

Journal: :Vision Research 2013
Zachary M. Westrick Christopher A. Henry Michael S. Landy

The processing of texture patterns has been characterized by a model that postulates a first-stage linear filter to highlight a component texture, a pointwise rectification stage to convert contrast for the highlighted texture into mean response strength, followed by a second-stage linear filter to detect the texture-defined pattern. We estimated the spatial-frequency bandwidth of the second-st...

Journal: :IEEE Transactions on Communications 2019

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