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Rolling code is a technique to prevent replay attack on keyless entry systems, such as garage door openers and car locks. It uses a pseudorandom number generator to change the code for each transmission, and requires both transmitter and receiver to compare the codes.
Olivia MFSK is a digital protocol for transmitting ASCII characters over noisy shortwave bands. It uses multiple frequency-shift keying and forward error correcting ...
SAE J1939 is a standard for communication and diagnostics among vehicle components, using CAN and ISO 11898 physical layers. It defines Parameter Group Numbers (PGNs) for various functions and data, and is widely used in diesel engines and other applications.
Learn about the history and features of the Volkswagen Karmann Ghia, a family of sporty Volkswagen models produced from 1955 to 1975. The Karmann Ghia combined the mechanicals of the Beetle or Type 3 with styling by Italy's Carrozzeria Ghia and hand-built bodywork by Karmann.
These vectors will be assigned to individual users and are called the code, chip code, or chipping code. In the interest of brevity, the rest of this example uses codes v with only two bits. Each user is associated with a different code, say v. A 1 bit is represented by transmitting a positive code v, and a 0 bit is represented by a negative ...
Learn about different kinds of radio codes, such as brevity codes, operating signals, procedure words and spelling alphabets. Find out how they are used in telecommunication systems and car audio systems.
AArch64 or ARM64 is the 64-bit Execution state of the ARM architecture family, introduced with the Armv8-A architecture and its extensions. It has a new instruction set, A64, with 31 general-purpose registers, advanced SIMD, and a new exception system.
MFSK is a form of digital modulation that uses more than two frequencies to transmit data. Learn about its fundamentals, applications, and challenges in HF communications.