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Principles of Digital Modulation

Introduction to digital modulation Relevant Modulation Schemes (QPSK, GMSK, M-Ary Schemes) Coherent and Differential Reception The impact of the mobile channel on digital modulation
– noise and interference – random FM (narrowband fading) – intersymbol interference (wideband fading
The bit rate defines the rate at which information is passed. l The baud (or signalling) rate defines the number of symbols per second. Each symbol represents n bits, and has M signal states, where M = 2n. This is called M-ary signalling.

Từ khóa: digital mode, GMSK Signals, GMSK Spectra, Shadowing, Intersymbol Interference, The Multipath Environment

40 p tailieu_mku 14/05/2012 299 1

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