Frequency modulation (5112 bytes)
1: ... [[amplitude]] of the carrier is varied while its frequency remains constant.)
3: ... a set of discrete values, a technique known as [[frequency-shift keying]].
5: FM is commonly used at [[VHF]] [[radio frequency|radio frequencies]] for [[high-fidelity]] [[radio...
7: ...size sound. This technique, known as [[frequency modulation synthesis|FM synthesis]], was popularized by earl...
10: ...ier wave. The bottom diagram shows the resulting frequency-modulated signal.]]

Frequency modulation synthesis (3453 bytes)
1: ...esized tone timbres is available [[media:frequencymodulationdemo-cf220mf440.ogg|here]].</small></td></tr></tab...
2: <tr><td>[[Image:frequencymodulationdemo-fd.png]]</td></tr></table>
3: ...ation|frequency modulating]] it with a modulating frequency that is also in the audio range, resulting in a m...
5: ... the original carrier signal. As the amount of FM modulation increases, the sound grows progressively more com...
16: ...is of Complex Audio Spectra by Means of Frequency Modulation," Journal of the Audio Engineering Society 21(7),...

Modified Frequency Modulation (1095 bytes)
1: '''Modified Frequency Modulation''', commonly '''MFM''', is the magnetic data reco...
3: ...is a modification to the original FM ([[frequency modulation]]) scheme for encoding data on single-density flo...
12: [[de:Modified Frequency Modulation]]
13: [[ja:Modified Frequency Modulation]]

Orthogonal frequency division modulation (7629 bytes)
1: ... multitone modulation''' ('''DMT'''). OFDM is the modulation method used in the IEEE [[802.11]]a/g WLAN standa...
4: ...nstance using some type of [[Quadrature amplitude modulation|QAM]] or [[phase-shift keying|PSK]]) by its own d...
9: OFDM modulation and demodulation are typically (as of 2001) implemented using [[di...
11: ...scribed as '''coded orthogonal frequency division modulation''' ('''COFDM'''). As the overhead of doing this i...
15: ...g codes, adaptive equalization and reconfigurable modulation, COFDM has the following properties:

Modulation (2664 bytes)
1: For the [[music]]al use of "modulation", see '''[[modulation (music)]]'''.
5: ...ly a [[sine-wave]] signal. A device that performs modulation is known as a '''modulator'''.
7: Modulation techniques include:
8: *[[Amplitude modulation]] (AM)
9: *[[Phase modulation]] (PM, includes [[BPSK]], QPSK, etc.)

Metric modulation (1239 bytes)
1: ... [[Elliott Carter]], who prefers to call it tempo modulation.
3: ...alues will be in each measure before or after the modulation:

Phase modulation (1004 bytes)
1: '''Phase modulation''' (PM) is the encoding of information into a car...
3: ...requency modulation]] where the carrier frequency modulation is the time derivative of the PM modulating signa...
5: ...arded as a special case of [[quadrature amplitude modulation]].
7: ...ft keying]]''' refers to the simple case of phase modulation by a simple signal with a discrete number of stat...
11: *[[modulation]] for a list of other modulation techniques

Delta modulation (818 bytes)
1: '''Delta modulation''' (DM): Analog-to-[[digital signal]] conversion...
3: ...], [[delta-sigma modulation]], and [[differential modulation]].

Ring modulation (2699 bytes)
1: ...ther simple waveform. It is referred to as "ring" modulation because the [[analog]] [[electric circuit|circuit...
3: ...ess of [[ring modulation]], also called amplitude modulation, produces a signal rich in [[overtone]]s, suitabl...
7: ... domain]] is the same as [[convolution]] in the [[frequency domain]], so the output waveform contains the sum...
9: ...the operation or filter the signals prior to ring modulation.
11: ...the [[C64]] [[MOS Technology SID|SID]] chip, ring modulation multiplies a [[triangle wave]] with a [[square wa...

Envelope modulation (993 bytes)
1: ... '''envelope modulation''' is the amount that a [[modulation envelope]] effects a certain parameter ([[filter ...

Intensity modulation (741 bytes)
1: ...(IM): In optical [[communications]], a form of [[modulation]] in which the optical [[Power (physics)|power]] ...
3: In [[intensity]] modulation, there are no discrete upper and lower sidebands ...

Modulation factor (480 bytes)
1: ...o the maximum design variation in a given type of modulation.
3: ...[signal]] reaches zero. When zero is reached, the modulation is considered 100%.

Modulation rate (416 bytes)
1: In [[telecommunication]], the term '''modulation rate''' has the following meanings:
3: ...t the [[information]] in a [[digital signal]]. [[Modulation]] rate and [[information transfer]] rate are not ...

Jaxon modulation (898 bytes)
1: '''Jaxon modulation''' is a [[modulation]] system for placing [[information]] on a [[bitst...
5: ...istics. A three to one bit state bias would allow modulation of information onto the stream at 3/16ths of the ...
7: 3/4*((N-2)/(N+1)) = rate of modulation factor for N to 1 bit state biased carrier stream...

Video modulation (3621 bytes)
3: ...ero transmitter power. This is known as positive modulation.
5: ...lses to peak transmitter power. This is negative modulation.
7: ... first broadcast television systems used positive modulation, probably for no reason other than it seemed an o...
9: Experience showed that positive modulation had some serious disadvantages.
13: ...ation, and developed their service using negative modulation. This provided 2 important advantages. First, i...

Covalent modulation (196 bytes)
1: '''Covalent modulation''' is the alteration of a [[protein]]'s shape and...

Trellis modulation (1808 bytes)
1: ...ted channels such as [[telephone line]]s. Trellis modulation was invented by [[Gottfried Ungerboeck]].
9: ...shed a paper describing the principles of trellis modulation.
10: ...ion]] published modem standards utilizing trellis modulation to achieve rates of 19.2 kbit/s and higher.
12: Once manufacturers introduced modems with trellis modulation, transmission rates increased dramatically to the...
20: * G. Ungerboeck, "Trellis-coded modulation with redundant signal sets part I: introduction,"...

Eight-to-Fourteen Modulation (1588 bytes)
1: '''Eight-to-Fourteen Modulation''' ('''EFM''') is an encoding technique used in t...
15: [[de:Eight-to-Fourteen-Modulation]]

Modulation (music) (9047 bytes)
1: ... be accompanied by a change in [[key signature]]. Modulations articulate or create the structure or [[musical ...
3: ...dulatory space''' is the [[pitch space]] in which modulation is possible. For twelve tone [[equal temperament]...
5: ==Types of modulation==
7: ...(music)|key]], which helps to establish it. Brief modulations are often considered [[tonicization]]s.
9: ===Common chord modulation===

Modulation index (189 bytes)
1: ...ency deviation]] &sigma; to the modulating signal frequency ''fi'', i.e.,

<< Prev 20 Result Pages:   1  2  3  4  5  6  7  8  9  10  Next 20 >>