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,"...

Trellis (191 bytes)
1: A [[trellis]] is a frame-like structure on which [[vine|vined...
3: For an intrepretation in [[coding]], see [[Trellis network]].

Trellis drainage system (263 bytes)
1: Trellis drainage systems tend to occur where there is str...

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.)

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===

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...

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:

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

Allosteric modulation (159 bytes)
1: '''Allosteric modulation''' is the control of a [[protein]]'s [[binding si...

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...
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...
16: ...ulation/ Harmony Central: Effects Explained: Ring Modulation] by Scott Lehman

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 ...

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%.

Amplitude modulation (6350 bytes)
1: ...dulating signal. (Contrast this with [[frequency modulation]], in which the [[frequency]] of the carrier is v...
6: ...odulation.png|right|frame|An example of amplitude modulation. The top diagram shows the modulating signal sup...
12: ...ent is one of the primary advantages of amplitude modulation. This was especially important in the early days...
18: In its basic form, amplitude modulation produces a signal with power concentrated at the ...
22: ...e of the sidebands. This is '''[[single-sideband modulation]]''', widely used in [[amateur radio]] due to its...

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

Frequency modulation (5112 bytes)
1: ...[carrier wave]]. (Contrast this with [[amplitude modulation]], in which the [[amplitude]] of the carrier is v...
7: ...size sound. This technique, known as [[frequency modulation synthesis|FM synthesis]], was popularized by earl...
10: ...odulation.png|right|frame|An example of frequency modulation. The top diagram shows the modulating signal sup...
11: ...ances in Radio Signaling by a System of Frequency Modulation", which first described FM radio, before the [[Ne...
13: ...re still used in place of the somewhat mysterious modulation technique name).

Modulation index (189 bytes)
1: The '''modulation index''' (''m''f) is defined as the ratio of the ...

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]]

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

Adaptive modulation (1177 bytes)
1: '''Adaptive modulation''' is a transmission scheme in [[digital communic...
3: ... model wireless propagation enviroments, adaptive modulation systems exhibit great performance enhancements co...

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