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Frequency-division multiple access (FDMA) is a channel access method used in some multiple-access protocols. FDMA allows multiple users to send data through a single communication channel, such as a coaxial cable or microwave beam, by dividing the bandwidth of the channel into separate non-overlapping frequency sub-channels and allocating each sub-channel to a separate user.
Single-carrier FDMA (SC-FDMA) is a frequency-division multiple access scheme. Originally known as Carrier Interferometry , it is also called linearly precoded OFDMA ( LP-OFDMA ). Like other multiple access schemes (TDMA, FDMA, CDMA, OFDMA), it deals with the assignment of multiple users to a shared communication resource.
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.
ALOHAnet, also known as the ALOHA System, [1] [2] [3] or simply ALOHA, was a pioneering computer networking system developed at the University of Hawaii.ALOHAnet became operational in June 1971, providing the first public demonstration of a wireless packet data network.
Network architecture is the design of a computer network.It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as communication protocols used.
Janet respects Harris’ dual heritage as both Black and Indian and apologizes for any confusion caused. She values the diversity Harris represents and understands the importance of celebrating ...
In the early 1980s a standardisation and interconnection effort started, hosted on an expansion of the SERCnet X.25 research network. [nb 1] [13] [14] [15] The JANET effort was based on the Coloured Book protocols developed by the British academic community, which provided the first complete X.25 standard, [16] [17] and gave the UK "several years lead over other countries". [18]
Here’s a mission that may or may not be impossible: figuring out what the biggest movie star on Planet Earth was doing in Charlotte on Friday.