Spectral Containment and Performance Comparison of Constant Envelope OFDM-PM and Standard OFDM
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چکیده
In this paper we study the suitability of constant envelope multi-carrier modulation technique. This technique combines orthogonal frequency division multiplexing (OFDM) and phase modulation (PM) where: (1) PM creates a constant envelope signal which allows high power amplifier to operate near saturation levels thus maximizing power efficiency; (2) OFDM increases robustness to multipath fading. The motivation of the CEOFDM-PM system is to alleviate the high peak-to average power ratio of conventional OFDM systems. In this paper, we explore more details of CEOFDM-PM systems regarding bandwidth efficiency, power spectrum density performance under AWGN and multipath channels. By way of MATLAB simulation, CE-OFDM is shown to compare favorably to conventional OFDM.
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تاریخ انتشار 2010