3.3. Pulse Modulation and Detection Techniques
3.3.1. On-Off Keying
On-off keying (OOK) is the simplest form of pulse modulation, in which the transmission of a pulse represents a data bit 1 and its absence represents a data bit 0. Figure 3-3 shows an example of the OOK modulation technique in UWB communications systems.
Figure 3-3. On-off keying modulation
The general signal model, s(t), for an OOK modulated signal can be represented by
where M is the maximum number of transmitted bits, P(t) is the UWB pulse, bm ∊ [0,1] represents ...