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Article | REF: TE7372 V1

Principle of the OFDM transmission - usage in cellular systems

Author: Xavier LAGRANGE

Publication date: May 10, 2012

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2. OFDM basic principles

2.1 Parallel transmission principles

Here we consider the transmission of a sequence of digital symbols using digital phase and/or amplitude modulation. Let T s be the duration of a symbol.

Phase modulation consists of transmitting a high-frequency sinusoidal signal whose phase and amplitude vary with each symbol duration T s .

The number of possible phase and amplitude values (called the "valence") defines the type of modulation.

Figure

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