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{{Short description|Map of radio signal strength in an area}} ...ps''. Signal strength maps provide a metric that quantifies the [[Received signal strength indicator|received power]] at each location. In turn, propagation ...

...generated [[radio frequency]] [[alternating current]] and was used as a [[radio transmitter]].<ref name="Graf">{{cite book ...it was used briefly around World War I in a few high power [[longwave]] [[radio station]]s to transmit transoceanic [[radiotelegraphy]] traffic, until the ...

...ng as the number of bits increases. In multiphase power lines, a separate signal might be sent on each phase to speed up the transmission. ...common power line noise), lack of intermodulation distortion, and adaptive signal detection. ...

| Type = [[Outline of radio science|Radio science]]/[[Transponder]] ...aRa will monitor the [[Doppler effect|Doppler frequency shift]] of a radio signal traveling between the Martian lander and the [[Earth]]. These Doppler measu ...

{{short description|Class of obsolete radio navigation systems}} ...ence locates the receiver on a branch of a hyperbola focused on the ground stations. The receiver is then located at one of the two intersections. Other naviga ...

...bounces off an object, and the receiver of the sensor reads the reflected signal. They are fast, require less processing power and are affected less by weat ...radar when it encounters an object. Depending on the time it took for the signal to bounce back, the distance between the object and the radar is calculated ...

{{Short description|Maximum occupancy of a route in a given time}} ...e, or amount of freight than can travel a given route in a given amount of time, usually an hour. It may be limited by the worst [[bottleneck (engineering) ...

...with a progressive phase difference between elements such that the beam of radio transmission is in the desired direction. The beam direction is controlled ...eams with [[Orthogonality|orthogonal]] phase-modes so that multiple mobile stations can all simultaneously use the same frequency, each using a different phase ...

...the defense mechanism to be able to monitor a lot of vehicles at the same time. They can listen to VANET messages and they are all connected to each other ...ation algorithm. After witnesses sampling RSSIs for a sufficient amount of time, the localization algorithm will use these samples to estimate the position ...

...tenna]]s which work together as a single antenna, to transmit or receive [[radio wave]]s.<ref name="Carr">{{cite book ...ted in other directions. Similarly, when used for receiving, the separate radio frequency currents from the individual antennas combine in the receiver wit ...

...ad.php?t=36027 |title=625-Line Television Broadcast Standards - UK Vintage Radio Repair and Restoration Discussion Forum}}</ref><ref>{{cite web |url=https:/ .../forum/showthread.php?t=83653 |access-date=2021-12-31 |website=www.vintage-radio.net}}</ref>).<ref name=":0" /> At a CCIR Geneva meeting in July 1950 Dr. G ...

...ties are often based on concepts from [[information theory]] such as the [[signal-to-interference-plus-noise ratio]], which forms the mathematical basis for ...as network links, many of which will be simultaneously active at any given time. ...

{{Short description|Type of satellite that transmits over amateur radio frequencies}} {{amateur radio}} ...

|fields = [[Antenna theory]]<br> [[Radar signal processing]] ...>, that "''it is not possible to recover the information from the received signal, even in the case of an ideal channel.''"<ref>W. Kozek and A. F. Molisch.“N ...

...p>}} and {{math|''h'' {{=}} 3 m}} gives 2940&nbsp;J. Dividing this by the time taken (5&nbsp;s) gives a power of 588&nbsp;W. }} ...that 1 watt was defined as the quantity of energy transferred in a unit of time, namely 1&nbsp;J/s. In this new definition, 1 ''absolute'' watt&nbsp;= 1.00 ...

! [[Real-time clock|RTC]] | Real-time clock, watches; allows binary division to 1&nbsp;kHz signal (2⁵×1&nbsp;kHz). ...

{{Short description|Metal structure which confines microwaves or radio waves for resonance}} ...the type of resonator|the particle acceleration technology|Superconducting radio frequency|and|cryomodule}} ...

{{broader|History of radio}} [[Radio wave]]s were first identified in German physicist [[Heinrich Hertz]]'s 1887 ...

...e radio transmitter from 1938.jpg|thumb|Tuned circuit of a [[shortwave]] [[radio transmitter]]. This circuit does not have a resistor like the above, but al ...ner (electronics)|tuning]] to select a narrow frequency range from ambient radio waves. In this role, the circuit is often referred to as a tuned circuit. A ...

...d]]. The most commonly used approaches are the rulers, followed by transit-time methods and the interferometer methods based upon the [[speed of light]]. [ ==Transit-time measurement== ...