Abstract
Orthogonal Frequency Division Multiplexing (OFDM), a promising technique to support high-bit-rate wireless systems, is limited by potentially large Peak-to-Average Power ratio (PAR) and Intercarrier Interference (ICI) due to frequency offset errors. Several techniques proposed in the literature treat these limitations as two separate problems. We show that a simple adaptive modulation scheme is effective in reducing the both PAR and ICI simultaneously. We propose the use of M-point Zero-padded Phase Shift Keying (M-ZPSK), which includes a signal point of zero amplitude, as a modulation scheme. The performance of this scheme is evaluated analytically and by simulation. We also introduce the Peak Interference-to-Carrier Ratio (PICR) to measure the resulting intercarrier interference (ICI) effects at the transmitter. We show that Partial Transmit Sequence (PTS) and Selected Mapping (SLM) approaches can reduce PICR. These schemes are analyzed theoretically and their performances are evaluated by simulation.
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© 2002 Kluwer Academic Publishers
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Sathananthan, K., Tellambura, C. (2002). Reducing PAR and PICR of an OFDM Signal. In: Wysocki, T.A., Darnell, M., Honary, B. (eds) Advanced Signal Processing for Communication Systems. The International Series in Engineering and Computer Science, vol 703. Springer, Boston, MA. https://doi.org/10.1007/0-306-47791-2_19
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DOI: https://doi.org/10.1007/0-306-47791-2_19
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4020-7202-4
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