Results 241 to 250 of about 201,828 (293)
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IEEE Transactions on Magnetics, 1976
Small media defects are a major limitation to data reliability at high magnetic recording densities. One way of overcoming this limitation is to use an error correction code. In this paper, Pulse-Compression Recording (PCR) is proposed as a method in which the energy of each data bit is spatially dispersed in such a manner that the recorded information
R. Dent, R. Schneider
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Small media defects are a major limitation to data reliability at high magnetic recording densities. One way of overcoming this limitation is to use an error correction code. In this paper, Pulse-Compression Recording (PCR) is proposed as a method in which the energy of each data bit is spatially dispersed in such a manner that the recorded information
R. Dent, R. Schneider
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Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509), 2004
Pulse compression is essentially an estimation procedure in which the complex amplitude for a given range cell is to be estimated while mitigating the interference from neighboring range cells that results from the convolution of the transmitted waveform with the range swath of interest.
S.D. Blunt, K. Gerlach
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Pulse compression is essentially an estimation procedure in which the complex amplitude for a given range cell is to be estimated while mitigating the interference from neighboring range cells that results from the convolution of the transmitted waveform with the range swath of interest.
S.D. Blunt, K. Gerlach
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Proceedings of the IEEE, 1984
The seismic method in petroleum exploration is an echo-location technique to detect interfaces between the subsurface sedimentary layers of the earth. The received seismic reflection record (field trace), in general, may be modeled as a linear time-varying (LTV) system.
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The seismic method in petroleum exploration is an echo-location technique to detect interfaces between the subsurface sedimentary layers of the earth. The received seismic reflection record (field trace), in general, may be modeled as a linear time-varying (LTV) system.
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Relativistic pulse compression
Journal of the Optical Society of America B, 1991Tunable radiation can be produced by Doppler upshifting light from a laser-generated moving ionization front. We analyze this technique as a method of generating ultrashort tunable light pulses in the UV to extreme UV (XUV) regions of the spectrum and demonstrate the possibility of generating subfemtosecond short-wavelength light pulses.
Henry C. Kapteyn, Margaret M. Murnane
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IEEE Transactions on Aerospace and Electronic Systems, 2006
Pulse compression can be performed in noncoherent radars by using coded on-off keying (OOK). We show how any bipolar pulse-compression code (e.g., Barker) can be modified into unipolar OOK through Manchester coding. The resulted transmitted signal is a burst of dense subpulses, with pulse position modulation.
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Pulse compression can be performed in noncoherent radars by using coded on-off keying (OOK). We show how any bipolar pulse-compression code (e.g., Barker) can be modified into unipolar OOK through Manchester coding. The resulted transmitted signal is a burst of dense subpulses, with pulse position modulation.
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Pulse compression for a simple pulse
IEEE Transactions on Aerospace and Electronic Systems, 2008A new pulse compression method for a simple pulse is proposed. The proposed method has a filter with impulse response h(t) whose Fourier transform H(f) is given by D(f)/S(f), where D(f) is the Fourier transform of desired output waveform d(t) and S(f) is the Fourier transform of input signal s(t).
Masanori Shinriki +2 more
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Nonlinear second-harmonic pulse compression with tilted pulses
Optics Letters, 1997We demonstrate that the group velocities of interacting pulses can be adjusted by pulse tilting to optimize second-harmonic pulse compression for a variety of nonlinear crystals and wavelengths. As an experimental proof we present results of ninefold compression of 1.3-ps Nd:glass laser pulses in beta -barium borate crystal.
A, Dubietis +4 more
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Nonlinear Pulse Compression in Pulse-Inversion Fundamental Imaging
Ultrasonic Imaging, 2007Coded excitation can be applied in ultrasound contrast agent imaging to enhance the signal-to-noise ratio with minimal destruction of the microbubbles. Although the axial resolution is usually compromised by the requirement for a long coded transmit waveforms, this can be restored by using a compression filter to compress the received echo.
Cheng, Y.-C., Shen, C.-C., Li, P.-C.
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Wave collapse and optical-pulse compression
Physical Review A, 1993The past several decades of development of nonlinear optics clearly demonstrated an important role playing by universal nonlinear models. Simply formulated, but, at the same time, rich in content, the models such as the nonlinear Schrödinger equation, the sine-Gordon equation, the system describing three-wave resonant interaction, and others occur in a
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1968
The problem of optimal processing of radar signals maybe formulated as follows. A signal, s(t), reflected from a target is mixed with noise, n(t), when it enters the input of a receiver : $$ x\left( t \right) = s\left( t \right) + n\left( t \right) $$ (1-1) .
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The problem of optimal processing of radar signals maybe formulated as follows. A signal, s(t), reflected from a target is mixed with noise, n(t), when it enters the input of a receiver : $$ x\left( t \right) = s\left( t \right) + n\left( t \right) $$ (1-1) .
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