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Low-power FM Radio Stations In Washington (state)
Low power may refer to: * Radio transmitters that send out relatively little power: ** QRP operation, using "the minimum power necessary to carry out the desired communications", in amateur radio. ** Cognitive radio transceivers typically automatically reduce the transmitted power to much less than the power required for reliable one-way broadcasts. ** Low-power broadcasting that the power of the broadcast is less, i.e. the radio waves are not intended to travel as far as from typical transmitters. ** Low-power communication device, a radio transmitter used in low-power broadcasting. * Low-power electronics, the consumption of electric power is deliberately low, e.g. notebook processors. * Power (statistics), in which low power is due to small sample sizes or poorly designed experiments See also * Power (other) Power may refer to: Common meanings * Power (physics), meaning "rate of doing work" ** Engine power, the power put out by an engine ** Electric power, a type of e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
QRP Operation
QRP may refer to: * QRP operation in amateur radio, low-power transmitting * Queen retinue pheromone, a type of honey bee pheromones * Queens Road Peckham railway station, National Rail code * Quadratic residuosity problem in mathematics * Questionable research practices, see Research ethics#Scientific integrity, research ethics {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cognitive Radio
A cognitive radio (CR) is a radio that can be programmed and configured dynamically to use the best channels in its vicinity to avoid user interference and congestion. Such a radio automatically detects available channels, then accordingly changes its transmission or reception parameters to allow more concurrent wireless communications in a given band at one location. This process is a form of dynamic spectrum management. Description In response to the operator's commands, the cognitive engine is capable of configuring radio-system parameters. These parameters include " waveform, protocol, operating frequency, and networking". This functions as an autonomous unit in the communications environment, exchanging information about the environment with the networks it accesses and other cognitive radios (CRs). A CR "monitors its own performance continuously", in addition to "reading the radio's outputs"; it then uses this information to "determine the RF environment, channel condit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low-power Broadcasting
Low-power broadcasting is broadcasting by a broadcast station at a low transmitter power output to a smaller service area than "full power" stations within the same region. It is often distinguished from "micropower broadcasting" (more commonly " microbroadcasting") and broadcast translators. LPAM, LPFM and LPTV are in various levels of use across the world, varying widely based on the laws and their enforcement. Canada Radio communications in Canada are regulated by the Radio Communications and Broadcasting Regulatory Branch, a branch of Industry Canada, in conjunction with the Canadian Radio-television and Telecommunications Commission (CRTC). Interested parties must apply for both a certificate from Industry Canada and a license from CRTC in order to operate a radio station. Industry Canada manages the technicalities of spectrum space and technological requirements whereas content regulation is conducted more so by CRTC. LPAM stations are authorized to operate with l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low-power Communication Device
A short-range device (SRD), described by Electronic Communications Committee, ECC Recommendation 70-03, is a radio-frequency transmitter device used in telecommunication that has little capability of causing radio interference, harmful interference to other radio equipment. Short-range devices are low-power transmitters, typically limited to 25–100 mW effective radiated power (ERP) or less, depending on the frequency band, which limits their useful range to a few hundred meters, which do not require licenses to use. Short-range wireless technologies include Bluetooth, Wi-Fi, NearLink, near-field communication (NFC), Low-power_wide-area_network, LPWAN, ultra-wideband (UWB) and IEEE 802.15.4. They are implemented by chips semiconductor device fabrication, fabricated as RF CMOS integrated circuit (RF circuit). , short-range wireless chips ship approximately billion units annually, with Bluetooth accounting for over 55% of shipments and Wi-Fi around 35% of shipments. Applica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low-power Electronics
Low-power electronics are electronics designed to consume less electrical power than usual, often at some expense. For example, notebook processors usually consume less power than their desktop counterparts, at the expense of computer performance. History Watches The earliest attempts to reduce the amount of power required by an electronic device were related to the development of the wristwatch. Electronic watches require electricity as a power source, and some mechanical movements and hybrid electromechanical movements also require electricity. Usually, the electricity is provided by a replaceable battery. The first use of electrical power in watches was as a substitute for the mainspring, to remove the need for winding. The first electrically powered watch, the Hamilton Electric 500, was released in 1957 by the Hamilton Watch Company of Lancaster, Pennsylvania. The first quartz wristwatches were manufactured in 1967, using analog hands to display the time. Eric A. Vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power (statistics)
In frequentist statistics, power is the probability of detecting a given effect (if that effect actually exists) using a given test in a given context. In typical use, it is a function of the specific test that is used (including the choice of test statistic and significance level), the sample size (more data tends to provide more power), and the effect size (effects or correlations that are large relative to the variability of the data tend to provide more power). More formally, in the case of a simple hypothesis test with two hypotheses, the power of the test is the probability that the test correctly rejects the null hypothesis (H_0) when the alternative hypothesis (H_1) is true. It is commonly denoted by 1-\beta, where \beta is the probability of making a Type I and type II errors#Type II error, type II error (a false negative) conditional probability, conditional on there being a true effect or association. Background Statistical testing uses data from Sampling (statisti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
