Title :
Analytical Expressions for the Power Spectral Density of CP-OFDM and ZP-OFDM Signals
Author :
Van Waterschoot, Toon ; Le Nir, Vincent ; Duplicy, Jonathan ; Moonen, Marc
Author_Institution :
ESAT-SCD, Katholieke Univ. Leuven, Leuven, Belgium
fDate :
4/1/2010 12:00:00 AM
Abstract :
In this letter, analytical expressions are derived for the power spectral density (PSD) of orthogonal frequency division multiplex (OFDM) signals employing a cyclic prefix (CP-OFDM) or zero padding (ZP-OFDM) time guard interval. Under the relatively weak assumptions that (i) the data are independent and identically distributed on all OFDM subcarriers and (ii) the OFDM pulse shape is sufficiently localized in time, simple closed-form PSD expressions can be obtained. These expressions are then compared to existing OFDM PSD expressions and validated by inspecting the power spectra of some standardized OFDM signals.
Keywords :
OFDM modulation; closed-form PSD expressions; cyclic prefix OFDM; orthogonal frequency division multiplex signals; power spectral density; zero padding OFDM; Cyclic prefix (CP); orthogonal frequency division multiplex (OFDM); power spectral density (PSD); zero padding (ZP);
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2010.2040651
