A constant-amplitude modulation scheme for orthogonal frequency-division multiplexing (OFDM) over wireless channels is proposed in this paper. To alleviate the high peak-to-average power ratio (PAPR) of OFDM signals, the proposed scheme decomposes an OFDM signal into two constant-amplitude signals, which are transmitted at different timing. On the receiver side, the original OFDM signal is regenerated by combining two received signals that originate from these two constant-amplitude signals, which are propagated through the wireless channels. As a conventional constant-amplitude OFDM scheme, the constant envelope OFDM (CE-OFDM) scheme transforms the OFDM signal into a phase modulated signal. Computer simulations make a comparison between the proposed and conventional schemes, and demonstrate that the proposed scheme is much superior to CE-OFDM in bit error rate (BER) performance while both the schemes have almost the same out-of-band spectral characteristics.
Constant-Amplitude OFDM for Wireless Communication Systems
2020-05-01
164046 byte
Conference paper
Electronic Resource
English
Constant Envelop Minimum-Shift Keying OFDM Coherent Optical Communication System
British Library Online Contents | 2012
|Constant Envelop Minimum-Shift Keying OFDM Coherent Optical Communication System
British Library Online Contents | 2012
|