Search results
Results From The WOW.Com Content Network
A pseudo-noise code (PN code) or pseudo-random-noise code (PRN code) is one that has a spectrum similar to a random sequence of bits but is deterministically generated. The most commonly used sequences in direct-sequence spread spectrum systems are maximal length sequences, Gold codes, Kasami codes, and Barker codes.
Radio jamming. Radio jamming is the deliberate blocking of or interference with wireless communications. [ 1][ 2] In some cases, jammers work by the transmission of radio signals that disrupt telecommunications by decreasing the signal-to-noise ratio. [ 3]
A recording of The Gong numbers station, run by the National People's Army of the German Democratic Republic, from 1988. A numbers station is a shortwave radio station characterized by broadcasts of formatted numbers, which are believed to be addressed to intelligence officers operating in foreign countries. [ 1]
0041–0057. Belgium. Assigned for VFR traffic under Flight Information Services (BXL FIC). [citation needed] 0100. Australia. Flights operating at aerodromes (in lieu of codes 1200, 2000 or 3000 when assigned by ATC or noted in the Enroute Supplement). [ 6] 0100–0400.
Specific Area Message Encoding (SAME) is a protocol used for framing and classification of broadcasting emergency warning messages. It was developed by the United States National Weather Service for use on its NOAA Weather Radio (NWR) network, and was later adopted by the Federal Communications Commission for the Emergency Alert System, then subsequently by Environment Canada for use on its ...
A noise generator is a circuit that produces electrical noise (i.e., a random signal). Noise generators are used to test signals for measuring noise figure, frequency response, and other parameters. Noise generators are also used for generating random numbers. [ 1]
Code generator from German WW II IFF-Radio FuG 25a Erstling FuG 25a Erstling (English: Firstborn, Debut) was developed in Germany in 1940. It was tuned to the low- VHF band at 125 MHz used by the Freya radar , and an adaptor was used with the low- UHF -banded 550–580 MHz used by Würzburg .
The Y-code is what the satellites have been transmitting since the anti-spoofing module was enabled. The encrypted signal is referred to as the P(Y)-code. The details of the W-code are secret, but it is known that it is applied to the P-code at approximately 500 kHz, [6] about 20 times slower than the P-code chip rate. This has led to semi ...