Continuous phase Flip-OFDM in optical wireless communications
نویسندگان
چکیده
Abstract Intensity Modulated (IM) optical communication over an LED channel requires the use of a non-negative signal that can also cope with low-pass nature LEDs. For this purpose, dedicated schemes such as Flip-OFDM and Assymetrically Clipped Optical (ACO)-OFDM have been proposed. We derive common mathematical description on which both rely. Exploiting insight, we propose Continuous Phase (CP-Flip-OFDM) enhancement to Flip-OFDM. It ensures phase continuity at transition between two successive copies OFDM blocks, thereby it obviates Cyclic Midfix first block its flipped copy. Simultaneously, less compute-intensive way generate detect ACO-OFDM. Instead creating Hermitian-symmetry transmit Inverse FFT input, is in IM OFDM, zero padding. After IFFT, ramp-up, i.e., multiplication complex-valued exponential, applied before truncating real signal.
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ژورنال
عنوان ژورنال: Signal Processing
سال: 2021
ISSN: ['0165-1684', '1872-7557']
DOI: https://doi.org/10.1016/j.sigpro.2021.107963