22-747: (Redirected from Channels ) [REDACTED] Look up channel or Channel in Wiktionary, the free dictionary. Channel , channels , channeling , etc., may refer to: Geography [ edit ] Channel (geography) , a landform consisting of the outline (banks) of the path of a narrow body of water. Australia [ edit ] Channel Country , region of outback Australia in Queensland and partly in South Australia, Northern Territory and New South Wales. Channel Highway ,
44-667: A certain protocol layer . Underlying protocol layers are replaced by a simplified model. The model may reflect channel performance measures such as bit rate , bit errors , delay , delay variation , etc. Examples of digital channel models include: In an analog channel model, the transmitted message is modeled as an analog signal . The model can be a linear or non-linear , time-continuous or time-discrete (sampled) , memoryless or dynamic (resulting in burst errors ), time-invariant or time-variant (also resulting in burst errors), baseband , passband (RF signal model), real-valued or complex-valued signal model. The model may reflect
66-614: A chain of eight islands located in the Pacific Ocean off the coast of Southern California, United States Channel Lake, Illinois , a census-designated place in Lake County, Illinois, United States Channels State Forest , a state forest in Virginia, United States Channel, Channel-Port aux Basques , Newfoundland, Newfoundland and Labrador, Canada; a town district Other places [ edit ] Channel Glacier ,
88-438: A channel refers to a theoretical channel model with certain error characteristics. In this more general view, a storage device is also a communication channel, which can be sent to (written) and received from (reading) and allows communication of an information signal across time. Examples of communications channels include: All of these communication channels share the property that they transfer information. The information
110-432: A defunct British airline Channel Home Centers , a defunct home improvement chain based in the northeastern United States Business and legal terms [ edit ] Channel (chart pattern) , a pair of parallel trend lines that form a chart pattern for a stock or commodity Distribution channel , a chain of intermediaries, each passing the product down the chain to the next organization, before it finally reaches
132-687: A glacier in the Palmer Archipelago, Antarctica Channel Rock (disambiguation) , various rocks English Channel (Tabuaeran) , "A deep opening, thereafter called the English Channel , was blasted on the west side of the atoll." Arts, entertainment, and media [ edit ] Television [ edit ] Channel Television , a division of British ITV Channels TV (Niger) A company of Tele Sahel . Other uses in arts, entertainment, and media [ edit ] Channeler ( The Wheel of Time ) , fictional characters in
154-906: A physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel in telecommunications and computer networking . A channel is used for information transfer of, for example, a digital bit stream , from one or several senders to one or several receivers . A channel has a certain capacity for transmitting information, often measured by its bandwidth in Hz or its data rate in bits per second . Communicating an information signal across distance requires some form of pathway or medium. These pathways, called communication channels, use two types of media: Transmission line -based telecommunications cable (e.g. twisted-pair , coaxial , and fiber-optic cable ) and broadcast (e.g. microwave , satellite , radio , and infrared ). In information theory ,
176-775: A regional highway in Tasmania, Australia. Europe [ edit ] Channel Islands , an archipelago in the English Channel, off the French coast of Normandy Channel Tunnel or Chunnel, a rail tunnel underneath the English Channel English Channel , called simply "The Channel", the part of the Atlantic Ocean that separates Great Britain from northern France North America [ edit ] Channel Islands of California ,
198-420: A transition probability p(i, o) . Semantically, the transition probability is the probability that the symbol o is received given that i was transmitted over the channel. Statistical and physical modeling can be combined. For example, in wireless communications the channel is often modeled by a random attenuation (known as fading ) of the transmitted signal, followed by additive noise. The attenuation term
220-409: A transition probability that specifies an output distribution for each possible sequence of channel inputs. In information theory , it is common to start with memoryless channels in which the output probability distribution only depends on the current channel input. A channel model may either be digital or analog. In a digital channel model, the transmitted message is modeled as a digital signal at
242-419: A transmission medium used to convey information Audio channel , a communications channel in a storage device used in operations such as multitrack recording and playback Channel (broadcasting) , a range of frequencies assigned for the operation of a television, radio, or other broadcast station Television channel , a television station or its cable/satellite counterpart Channel (digital image) ,
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#1732780253654264-584: Is a simplification of the underlying physical processes and captures the change in signal power over the course of the transmission. The noise in the model captures external interference or electronic noise in the receiver. If the attenuation term is complex it also describes the relative time a signal takes to get through the channel. The statistical properties of the attenuation in the model are determined by previous measurements or physical simulations. Communication channels are also studied in discrete-alphabet modulation schemes. The mathematical model consists of
286-439: Is carried through the channel by a signal . Mathematical models of the channel can be made to describe how the input (the transmitted signal) is mapped to the output (the received signal). There exist many types and uses of channel models specific to the field of communication. In particular, separate models are formulated to describe each layer of a communication system. A channel can be modeled physically by trying to calculate
308-568: Is different from Wikidata All article disambiguation pages All disambiguation pages channel Too Many Requests If you report this error to the Wikimedia System Administrators, please include the details below. Request from 172.68.168.226 via cp1108 cp1108, Varnish XID 222728536 Upstream caches: cp1108 int Error: 429, Too Many Requests at Thu, 28 Nov 2024 07:50:53 GMT Communication channel A communication channel refers either to
330-589: The Wheel of Time fantasy book series by Robert Jordan Channeling (Rolemaster) , a magic element in the Rolemaster role-playing game Channels (band) , fronted by former Jawbox singer/guitarist J. Robbins Channels (film) , a 2008 film The Channel (film) , a 2023 film Pre-chorus , or build or channel, part of a song structure of popular music Science and technology [ edit ] Communications [ edit ] Communication channel ,
352-416: The consumer Legal channeling , the act of legally making one entity responsible for an event, and thereby dismissing other parties from liability Marketing channel , set of activities necessary to transfer the ownership of goods from the point of production to the point of consumption Sports [ edit ] Channel (association football) , football (soccer) terminology for particular areas of
374-442: The following channel impairments: These are examples of commonly used channel capacity and performance measures: In networks, as opposed to point-to-point communication, the communication media can be shared between multiple communication endpoints (terminals). Depending on the type of communication, different terminals can cooperate or interfere with each other. In general, any complex multi-terminal network can be considered as
396-407: The grayscale representation of a primary color in a digital image Channel (programming) , in computer science, a tool used for interprocess communication Channel I/O , in computing, a high-performance input/output (I/O) architecture Video blog , hosted by a video-sharing website or channel Other uses in science and technology [ edit ] Channel (semiconductor) , a part of
418-498: The physical processes which modify the transmitted signal. For example, in wireless communications, the channel can be modeled by calculating the reflection from every object in the environment. A sequence of random numbers might also be added to simulate external interference or electronic noise in the receiver. Statistically, a communication channel is usually modeled as a tuple consisting of an input alphabet, an output alphabet, and for each pair (i, o) of input and output elements,
440-896: The pitch Channel (horse) , a racehorse Channel Football Club , an Australian football club in Tasmania Other uses [ edit ] Channel catfish , a catfish species in North America Meridian (Chinese medicine) , or channels, a concept central to traditional Chinese medical techniques such as acupuncture, and to martial arts such as tai chi and qigong Mediumship or channelling, communication with spirits See also [ edit ] [REDACTED] Search for "channel" on Misplaced Pages. Canal (disambiguation) Chanel (disambiguation) Channeling (disambiguation) All pages with titles beginning with Channel All pages with titles containing Channel Topics referred to by
462-411: The same term [REDACTED] This disambiguation page lists articles associated with the title Channel . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Channel&oldid=1242266293 " Category : Disambiguation pages Hidden categories: Short description
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#1732780253654484-503: The structure of a field-effect transistor Ion channel , a protein that allows ion flow through a cell membrane Scattering channel , a concept in quantum mechanics Strut channel , a standardized formed structural system used in the construction and electrical industries Structural channel Brands and enterprises [ edit ] The Channel (nightclub) , a music venue in Boston, Massachusetts, U.S. Channel Express ,
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