comparison between time reversal and inverse filter focusingdoi:10.1007/0-306-47107-8_13Jean-François AubryMickaël TanterJean-Louis ThomasMathias FinkSpringer USF. Aubry, M. Tanter, J. L. Thomas, and M. Fink, "Comparison between time reversal and inverse filter focusing," Acoustical Imaging...
Time reversal mirror (TRM) technology is the adaptive focusing method evolved from the phase conjugate method in optics. Conventional incentive method in TRM technology is a narrow pulse signal with a high bandwidth. In this paper, the autocorrelation property of the TRM was proved from the time...
Time reversal and the inverse filter. To focus ultrasonic waves in an unknown inhomogeneous medium using a phased array, one has to calculate the optimal set of signals to be applied on the tra... Tanter,J L,Thomas,... - 《Journal of the Acoustical Society of America》 被引量: 284发表...
Timereversalprincipleanditsapplicationtopassivecommunicationwereintroduced. 分析了时反法的理论基础,并对其用于浅海被动通信进行了仿真研究。 www.ceps.com.tw 4. Therelationbetweenspatiotemporalinversefilterandtimereversalisanalyzed,andtheiterativetimereversal ispresented. ...
K. Gruber, "Time-reversal-based imaging and inverse scattering of multiply scattering point targets," J. ... EA Marengo,FK Gruber - 《Journal of the Acoustical Society of America》 被引量: 56发表: 2006年 Target characterization using decomposition of the time-reversal operator: electromagnetic ...
Time reversal technique consists in using the time inverse of the propagation channel impulse response (between a transceiver and a receiver) as a prefilter. Such pre-filtered signal is received with a stronger power (this is spatial focusing) and with a strong main echo, relatively to ...
The time-reversal mirror (TRM) prescribes the reverse playback of a signal to focalize an acoustic excitation as a Loschmidt echo. In the quantum domain, the perfect inverse filter (PIF) processes this signal to ensure an exact reversion provided that the excitation originated outside the ...
We find that the electron affinity, which is very sensitive to the ionic valence and the cluster geometry, depends strongly on the photoemission process, and that the time-reversal symmetry is completely broken between the photemission and its inverse process. This is due to large structural ...
Chapter Four. The Fast Fourier Transform Chapter Four. The Fast Fourier Transform RELATIONSHIP OF THE FFT TO THE DFT HINTS ON USING FFTS IN PRACTICE FFT SOFTWARE PROGRAMS DERIVATION OF THE RADIX-2 FFT ALGORITHM FFT INPUT/OUTPUT DATA INDEX BIT REVERSAL ...
The concept of time reversal (TR) of a scalar wave is reexamined from basic principles. Five different time-reversal mirrors (TRMs) are introduced and their relations are analyzed. For the boundary behavior, it is shown that for a paraxial wave only the monopole TR scheme satisfies the exact...