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The 60 GHz band is of much interest since this is the band in which a massive amount of spectral space (5 GHz) has been allocated unlicensed worldwide for dense wireless local communications. OFDM has gained much popularity in the field of wireless communication because of its ability to transfer the data at higher rate, high bandwidth efficiency and its robustness with regard to multipath and delay. But the major hurdle is high PAPR leading to inter-modulation distortion and out-of-band spectral growth. Constant envelope OFDM transforms the OFDM signal, to a signal with nearly zero dB PAPR. The PAPR performance of conventional OFDM system improves with constant envelope OFDM system.
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