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2. Wireless power transfer - Wikipedia

   en.wikipedia.org/wiki/Wireless_power_transfer

   Wireless power transfer ( WPT ), wireless power transmission, wireless energy transmission ( WET ), or electromagnetic power transfer is the transmission of electrical energy without wires as a physical link. In a wireless power transmission system, an electrically powered transmitter device generates a time-varying electromagnetic field that ...

3. Multichannel multipoint distribution service - Wikipedia

   en.wikipedia.org/wiki/Multichannel_Multipoint...

   MMDS microwave dish. Multichannel multipoint distribution service ( MMDS ), formerly known as broadband radio service ( BRS) and also known as wireless cable, is a wireless telecommunications technology, used for general-purpose broadband networking or, more commonly, as an alternative method of cable television programming reception.

4. Cable television - Wikipedia

   en.wikipedia.org/wiki/Cable_television

   Cable television is a system of delivering television programming to consumers via radio frequency (RF) signals transmitted through coaxial cables, or in more recent systems, light pulses through fibre-optic cables. This contrasts with broadcast television, in which the television signal is transmitted over-the-air by radio waves and received ...

5. Signal transmission - Wikipedia

   en.wikipedia.org/wiki/Signal_transmission

   Signal transmission. Antenna used for transmission of radio signals. In telecommunications, transmission is the process of sending or propagating an analog or digital signal via a medium that is wired, wireless, or fiber-optic. [ 1][ 2] Transmission system technologies typically refer to physical layer protocol duties such as modulation ...

6. Orthogonal frequency-division multiplexing - Wikipedia

   en.wikipedia.org/wiki/Orthogonal_frequency...

   Conceptually, OFDM is a specialized frequency-division multiplexing (FDM) method, with the additional constraint that all subcarrier signals within a communication channel are orthogonal to one another. In OFDM, the subcarrier frequencies are chosen so that the subcarriers are orthogonal to each other, meaning that crosstalk between the sub ...

7. Television transmitter - Wikipedia

   en.wikipedia.org/wiki/Television_transmitter

   A television transmitter is a transmitter that is used for terrestrial (over-the-air) television broadcasting. It is an electronic device that radiates radio waves that carry a video signal representing moving images, along with a synchronized audio channel, which is received by television receivers ('televisions' or 'TVs') belonging to a ...

8. Wireless telegraphy - Wikipedia

   en.wikipedia.org/wiki/Wireless_telegraphy

   Wireless telegraphy or radiotelegraphy, commonly called CW ( continuous wave ), ICW (interrupted continuous wave) transmission, or on-off keying, and designated by the International Telecommunication Union as emission type A1A or A2A, is a radio communication method. It was transmitted by several different modulation methods during its history.

9. Wireless - Wikipedia

   en.wikipedia.org/wiki/Wireless

   Characteristics. Techniques. v. t. e. Wireless communication (or just wireless, when the context allows) is the transfer of information ( telecommunication) between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most common wireless technologies use radio waves.