Peak-to-average power ratio analysis for NC-OQAM/OFDM transmissions

Abstract

Offset Quadrature Amplitude Modulation based Orthogonal frequency Division Multiplexing OQAM/OFDM has emerged as exciting technologies to solve the spectrum scarcity in future cellular networks. In this paper, statistical analysis is presented for Non-Contiguous Offset Quadrature Amplitude Modulation based Frequency Division Multiplexing (NC-OQAM/OFDM) signals for Peak to Average Power Ratio. When studying contiguous OQAM/OFDM signals, we analyze the high PAPR of NC-OFDM/OQAM signals to achieve high power efficiency. Most of the symbols are identically and independently distributed (i.i.d), when studying contiguous OQAM/OFDM signals. However, in an NC-OQAM/OFDM transmission, where a large number of subcarriers could be deactivated, this assumption is no longer valid. The proposed PAPR analysis is derived specifically for the NCOQAM/OFDM transmission scenario. Results show that NCOQAM/OFDM signal exhibit higher PAPR values relative to contiguous OQAM/OFDM transmission at the same information rate.