Frequency spreads of broadband signals reflecting from a random surface
نویسندگان
چکیده
منابع مشابه
Broadband vibrational sum frequency generation spectroscopy of a liquid surface.
An important advance in surface science has been the evolution of sum frequency generation to the application of studying surface structure and chemistry of liquid surfaces at the molecular-level by probing the vibrational signatures of surface molecules. Recently, broad-bandwidth sum frequency generation (BBSFG) spectroscopy has become an important tool for investigating gas-solid interfaces. ...
متن کاملSensor and Simulation Notes Note 506 January 2006 A Frequency Selective Surface Used as a Broadband Filter to Pass Low-Frequency UWB while Reflecting X–Band Radar
Airborne ultra wideband (UWB) impulse-radiating antennas (IRAs) present an especially large radar cross section to X–band radar. To mitigate this problem, we have numerically and experimentally investigated the use of a frequency selective surface (FSS) as a broadband filter to reflect X–band radar while transmitting lower-frequency UWB signals without loss or dispersion. We present here result...
متن کاملDetecting weak sinusoidal signals embedded in a non-stationary random broadband noiseラA simulation study
In the present study, a simple numerical function is proposed for use together with the time–frequency analysis in the detection of very weak sinusoidal signals embedded in a non-stationary random broadband background noise. Its performance is studied through the use of two numerical examples. It is found that the present method enables good recovery of the sinusoidal signals and the instants o...
متن کاملPartial spreads in random network coding
ABSTRACT. Following the approach by R. Kötter and F. R. Kschischang, we study network codes as families of k-dimensional linear subspaces of a vector space Fq , q being a prime power and Fq the finite field with q elements. In particular, following an idea in finite projective geometry, we introduce a class of network codes which we call partial spread codes. Partial spread codes naturally gene...
متن کاملExplicit neural signals reflecting reward uncertainty
The acknowledged importance of uncertainty in economic decision making has stimulated the search for neural signals that could influence learning and inform decision mechanisms. Current views distinguish two forms of uncertainty, namely risk and ambiguity, depending on whether the probability distributions of outcomes are known or unknown. Behavioural neurophysiological studies on dopamine neur...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1983
ISSN: 0001-4966
DOI: 10.1121/1.2021135