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 Ts 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 Ts .
The number of possible phase and amplitude values (called the "valence") defines the type of modulation.
Figure 2 shows the phase values used for some common modulations:
valence is 2 in BPSK (Binary Phase Shift...
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OFDM basic principles
Benefits and limitations of OFDM
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