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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.
Local multipoint distribution service (LMDS) is a broadband wireless access technology originally designed for digital television transmission (DTV). It was conceived as a fixed wireless, point-to-multipoint technology for utilization in the last mile. [1] LMDS commonly operates on microwave frequencies across the 26 GHz and 29 GHz bands. In ...
The passband of an FDM channel carrying digital data, modulated by QPSK quadrature phase-shift keying.. The multiple separate information (modulation) signals that are sent over an FDM system, such as the video signals of the television channels that are sent over a cable TV system, are called baseband signals.
In a hybrid fiber-coaxial cable system, television channels are sent from the cable system's distribution facility, the headend, to local communities through optical fiber subscriber lines. At the local community, an optical node translates the signal from a light beam to radio frequency (RF), and sends it over coaxial cable lines for ...
A 1 Gbit/s point-to-point millimeter-wave link installed in the UAE A point-to-point wireless unit with a built-in antenna at Huntington Beach, California. With the exception of passive optical networks, modern Ethernet is exclusively point-to-point on the physical layer – any cable only connects two devices.
Cable television is the most common transmission method in all urban areas of mainland China – television aerials are an extremely rare sight. Cable systems in China usually carry all the CCTV channels in Mandarin, along with all the channels of municipal, provincial or regional networks in question.
Not only does it allow us to plug in our USB devices but it gives us more outlets for lamps, TV, media devices, etc. Very handy and seems to provide adequate USB power." Amazon Qinliaf 5-Outlet ...
ATSC and DVB-T specify the modulation used for over-the-air digital television; by comparison, QAM is the modulation method used for cable. The specifications for a cable-ready television, then, might state that it supports 8VSB (for broadcast TV) and QAM (for cable TV). 8VSB is an 8-level vestigial sideband modulation.