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The signal-to-interference ratio (SIR or S/I), also known as the carrier-to-interference ratio (CIR or C/I), is the quotient between the average received modulated carrier power S or C and the average received co-channel interference power I, i.e. crosstalk, from other transmitters than the useful signal. [1] [2]
Larger than most UAVs, the WZ-7 features a tandem, joined-wing design, which allows for a more rigid, less flexible wing than other configurations, with benefits said to include an increased lift-to-drag ratio and less complex flight controls than a HALE UAV with a conventional wing.
Carrier-sense multiple access with collision avoidance (CSMA/CA) in computer networking, is a network multiple access method in which carrier sensing is used, but nodes attempt to avoid collisions by beginning transmission only after the channel is sensed to be "idle". [1] [2] When they do transmit, nodes transmit their packet data in its entirety.
Comparison of T-carrier and E-carrier systems System North American Japanese European Level zero (channel data rate) 64 kbit/s (DS0) 64 kbit/s: 64 kbit/s First level 1.544 Mbit/s (24 user channels) (T1) 1.544 Mbit/s (24 user channels) 2.048 Mbit/s (32 user channels) (E1) (Intermediate level, T-carrier hierarchy only)
L-carrier systems were loaded by multiplexing and supermultiplexing single sideband channels, using the long-standard 12 channel voice "group" produced by Type A channel banks, occupying a frequency spectrum between 60 and 108 kHz. This basic "group" was the entire line spectrum on previous long haul carrier systems, such as Types J and K.
There are several mechanisms by which minority carriers can recombine, each of which subtract from the carrier lifetime. The main mechanisms that play a role in modern devices are band-to-band recombination and stimulated emission, which are forms of radiative recombination, and Shockley-Read-Hall (SRH), Auger, Langevin, and surface recombination, which are forms of non-radiative recombination.