* Discrete-time signal, a time series consisting of a sequence of quantities ; a function over a domain of discrete integers

In signal processing, the Poisson summation formula leads to the Discrete-time Fourier transform and the Nyquist – Shannon sampling theorem.

Discrete-time filter design is beyond the scope of this article ; however, a simple example comes from the conversion of the continuous-time high-pass filter above to a discrete-time realization.

Its Fourier transform ( bottom ) is a periodic summation ( Discrete-time Fourier transform | DTFT ) of the original transform.

Discrete-time high-pass filters can also be designed.

Discrete-time signals are often referred to as time series in other fields.

* OGATA, K. Discrete-time control systems.

* reverse echo-a swelling effect created by reversing an audio signal and recording echo and / or delay whilst the signal runs in reverse.

: Plotted on the x-axis is the retention time and plotted on the y-axis a signal ( for example obtained by a spectrophotometer, mass spectrometer or a variety of other detectors ) corresponding to the response created by the analytes exiting the system.

Through signal generation, voice and instrument-level processing, a signal flow is created and controlled either by MIDI capabilities or voice and instrument-level controls.

And yet is fully recoverable as the real part of The product of with function shifts the < u > one-sided </ u > Fourier transform by amount No negative-frequency components are created, so the result is an analytic representation of the single sideband signal:

As the more complex sound signal is broken into the smaller sub-sounds, different levels are created, where at the top level we have complex sounds, which are made of simpler sounds on lower level, and going to lower levels even more, we create more basic and shorter and simpler sounds.

For velocity measurement, Professor Wolman of Dresden created an alternative of his Doppler tracking system in 1940 – 41, which used a ground signal transponded by the A-4 to measure the velocity of the missile.

The composite video signal created by devices such as most newer VCRs, game consoles and DVD players is a commonly used baseband signal.

Heterodyning is a radio signal processing technique invented in 1901 by Canadian inventor-engineer Reginald Fessenden, in which new frequencies are created by combining or mixing two frequencies.

Each of these techniques employs pseudorandom number sequences — created using pseudorandom number generators — to determine and control the spreading pattern of the signal across the alloted bandwidth.

* reverse echo-a swelling effect created by reversing an audio signal and recording echo and / or delay whilst the signal runs in reverse.

In this method, peaks are identified in frames using the STFT of the signal, and sinusoidal " tracks " are created by connecting peaks in adjacent frames.

If this wavelet were to be convolved at periodic intervals with a signal created from the recording of a song, then the results of these convolutions would be useful for determining when the Middle C note was being played in the song.

Activated IRS-1 molecules enhance the signal created by insulin.

It can be traced back to 1823 when it was created as a signal flag, never intended as a civil jack.

Mixing the playback signal back into the record input also created a primitive echo generator.

The intermediate frequency is created by mixing the carrier signal with a local oscillator signal in a process called heterodyning, resulting in a signal at the difference or beat frequency.

The DAC is driven with a pulse-density modulated signal, created with the use of a low-pass filter, step nonlinearity ( the actual 1-bit DAC ), and negative feedback loop, in a technique called delta-sigma modulation.

When the NTSC standard was created in the 1950s, this was not a real concern since the quality of the image was limited by the monitor equipment, not the limited-bandwidth signal being received.

He promoted the purchase of a VAX-11 / 780 for ' real-time ' signal processing research and created the Peripheral Signal Processor board ( PSP ).

By this standard, it is determined that where two stations operating on the same frequency are involved, objectionable interference from station A exists at any point within the service area of station B where station A's signal is of an intensity one-twentieth or more of the strength of station B's signal at that point.

But during nighttime hours the skywave radiations are reflected from the ionosphere, thereby creating the possibility of one station's rendering service, via skywave, at a much greater distance than it can through its groundwave signal, and at the same time vastly complicating the interference problem because of the still greater distance over which these skywave signals may cause interference to the signals of stations on the same and closely adjacent frequencies.

The electrical signal from the autocollimator is amplified and supplied to the Z-gyro torquer.

She went in to get the hamburgers, and I switched on the device again and kept the signal from Dowling's car coming in steady and clear until I saw her starting back with the hamburgers.

Mr. Phillips had only to signal from his doorway to summon aid from the ubiquitous bilingual children who played on the sidewalks of Mission Street.

As soon as that one man is appointed by himself or the others or by a signal from Spencer, we are going to be rushed.

His election was the signal for seven southern slave states to declare their secession from the Union and form the Confederacy.

Since altruism takes away resources from the altruist it can be a " honest signal " of resource availability and the abilities needed to gather resources.

It may also be a signal of interactive and cooperative intentions since those not interacting further in the future gain nothing from the costly signaling.

It differs from a digital signal, in which a continuous quantity is represented by a discrete function which can only take on one of a finite number of values.

A high enough opening bid could signal a player's determination to be first ranked in that attribute, thereby dissuading others from competing.

These devices convert a sound pressure wave to or from an electric signal.

* 1977 – The Big Ear, a radio telescope operated by Ohio State University as part of the SETI project, receives a radio signal from deep space ; the event is named the " Wow!

signal " from the notation made by a volunteer on the project.

They had some signal instances to point to, especially from the long years of the Peloponnesian War.

A distress signal from the sleeper ship eventually reaches " Relay ", a major node in the galactic communications network.

In these systems, the external adaptor also included its own clock, and used that to signal the SCC instead of it taking its signal from the SCC's internal clock.

Raymond Williams argues that there is no unique and or individual aesthetic object which can be extrapolated from the art world, but that there is a continuum of cultural forms and experience of which ordinary speech and experiences may signal as art.

The statue is an icon of freedom and of the United States: a welcoming signal to immigrants arriving from abroad.

The analog television signal contains timing and synchronization information so that the receiver can reconstruct a two-dimensional moving image from a one-dimensional time-varying signal.

A channel actually consists of two signals: the picture information is transmitted using amplitude modulation on one frequency, and the sound is transmitted with frequency modulation at a frequency at a fixed offset ( typically 4. 5 to 6 MHz ) from the picture signal.