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Understanding Ultra Wide Band Radio Fundamentals by Guerino Giancola - University of Rome La Sapienza, Maria-Gabriella Di Benedetto - University of Rome La Sapienza

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Chapter 3 The PSD of TH-UWB Signals

Power Spectral Density (PSD) for TH-UWB signals using PPM is derived in this chapter. The adopted approach (Di Benedetto and Vojcic, 2003) follows the analog PPM theory of the old days — practical pulse communication equipment is described in Black, Beyer, Grieser, and Polkinghorn as early as 1946 (Black et al., 1946) — and reconciles this well-known modulation method with its digital variant currently in vogue in wireless communications.

3.1 Borrowing From PPM

The signal of Eq. (2-4) has strong similarities with the output of a PPM modulator in its analog form. Given the modulating signal m(t), the PPM wave x(t) in its analog form consists of a train of identically shaped and strictly non-overlapping pulses ...

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