Reduction of peak-to-average power ratio in transform domain communication systems |
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Authors: | Martin RK Haker M |
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Affiliation: | Dept. of Electrical and Computer Engineering, The Air Force Inst. of Technology, Wright-Patterson AFB, Ohio; |
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Abstract: | Transform Domain Communication Systems (TDCS) are spectrum-scavenging systems which modulate data by a waveform whose magnitude is non-zero only in unused frequency bins, and whose phase is pseudo-random. This creates a noise-like waveform suitable for secure, low probability of intercept (LPI) communications, as well as spectrum-sharing applications. However, it also creates a high peak-to-average power ratio (PAPR). We investigate PAPR reduction in TDCS by modifying the projection onto complex sets approach for multicarrier systems. Simulations show that adequate PAPR reduction is achieved, transmitter-receiver waveform mismatches are not exacerbated by PAPR reduction, and the resulting waveform is still LPI. |
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