OFDM-CPM BER Performance in SUI Multipath Channels

Abstract

This paper presents the application of Orthogonal frequency domain modulation-Continuous Phase Modulation (OFDM-CPM) in multipath Standard University Interim (SUI) channels. It is shown that, in addition to OdB Peak to Average Power Ratio (PAPR) and power efficiency, uncoded OFDM-CPM exploits the frequency diversity of multipath channel. Taking into account the Input Power Backoff (IBO), OFDM-CPM is shown to outperform OFDM at high bit energy-to-noise density ratios (Eb/N0). However, at low Signal to Noise Ratio (SNR), the OFDM-CPM phase demodulator receiver suffers from a threshold effect. Simulation results in SUI channels confirm the analysis.