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radio clock: Encyclopedia II - Clock synchronization - Solutions

In a centralized system the solution is trivial; the centralized server will dictate the system time. Cristian's algorithm and the Berkeley Algorithm are some solutions to the clock synchronization problem in a centralized server environment. In a distributed system the problem takes on more complexity because a global time is not easily known. The most used clock synchronization solution on the internet is the Internet Network Time Protocol (NTP) which is a layered client-server architecture based on UDP message passing. C ...

Code division multiple access - Mathematical foundation. CDMA exploits at its core mathematical properties of orthogonality. Suppose we represent data signals as vectors. For example, the binary string "1011" would be represented by the vector (1, 0, 1, 1). We may wish to give a vector a name, we may do so by using boldface letters, eg a. We also use an operation on vectors, known as the dot product, to "multiply" vectors, by summing the product of the components. For example, the dot product of (1, 0, 1, ...

Code division multiple access, Code division multiple access - History of CDMA, Code division multiple access - Usage in mobile telephony, Code division multiple access - Technical details, Code division multiple access - Mathematical foundation, Code division multiple access - Implementation, Code division multiple access - Soft Handoff, Code division multiple access - CDMA features

radio clock: Encyclopedia II - Code division multiple access - Usage in mobile telephony

A number of different terms are used to refer to CDMA implementations. The original standard spearheaded by QUALCOMM was known as IS-95, the IS referring to an Interim Standard of the Telecommunications Industry Association (TIA). IS-95 is often referred to as 2G or second generation cellular. The QUALCOMM brand name cdmaOne may also be used to refer to the 2G CDMA standard. After several revisions, IS-95 was superseded by the IS-2000 standard. This standard was introduced to meet some of the criteria laid out in the IMT-2000 specific ...

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A Wisdom Archive on radio clock

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