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By Pat Hawker, D.E. Cole

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The Global System for Mobile Communications (GSM5 ) standard is generally recognized as the most elaborate 2G standard worldwide. In 1982, the Conference of European Postal 5 Formerly, the acronym GSM stood for “Groupe Sp´ ecial Mobile”. As the original pan-European GSM standard became more global, the meaning of the acronym GSM was changed to its present meaning. P1: TIX/XYZ JWST087-01 P2: ABC JWST087-Patzold August 17, 2011 Introduction 11:26 Printer Name: Yet to Come 3 and Telecommunications Administrations (CEPT) established a working group called Groupe Sp´ecial Mobile with the mandate to define standards for future pan-European cellular radio systems.

The inversion formula for the two-dimensional Fourier transform implies that the joint probability density function is given by ∞ ∞ pμ1 μ2 (x1 , x2 ) = μ1 μ2 (ν1 , ν2 ) e −∞ −∞ − j2π (ν1 x1 +ν2 x2 ) dν1 dν2 . 21) P1: TIX/XYZ JWST087-02 P2: ABC JWST087-Patzold August 19, 2011 19:23 Printer Name: Yet to Come Random Variables, Stochastic Processes, and Deterministic Signals 23 Marginal characteristic function: The marginal characteristic functions of the joint characteristic function μ1 μ2 (ν1 , ν2 ) can be obtained by μ1 (ν) = μ1 μ2 (ν, 0) μ2 (ν) and = μ1 μ2 (0, ν) .

In 2002, Teledesic has officially suspended its work on satellite construction. 11 Teledesic P1: TIX/XYZ JWST087-01 P2: ABC JWST087-Patzold August 17, 2011 11:26 Printer Name: Yet to Come Introduction 7 conferencing signals. MBS can be considered as a wireless extension of the wired B-ISDN12 system. , sports arenas, factory halls, television studios) and supports the wireless communication between MBS terminals and terminals directly connected to the B-ISDN network. The underlying technology of MBS is IP-based.

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