2017/07/14 by Jing Zhou, Wenyi Zhang, Zhou, Jing +1
Engineering · #Advanced Photonic Communication Systems #FOS: Computer and information sciences #Information Theory (cs.IT) #Optical Network Technologies #Optical Wireless Communication Technologies
paper · pdf · doi:10.48550/arxiv.1707.04497
openalex publication_date 2017/07/14 · openalex created_date 2022/03/02 · openalex updated_date 2026/07/28
We study the information rates of unipolar orthogonal frequency division\nmultiplexing (OFDM) in discrete-time optical intensity channels (OIC) with\nGaussian noise under average optical power constraint. Several single-,\ndouble-, and multicomponent unipolar OFDM schemes are considered under the\nassumption that independent and identically distributed (i.i.d.) Gaussian or\ncomplex Gaussian codebook ensemble and nearest neighbor decoding (minimum\nEuclidean distance decoding) are used. We obtain an array of information rate\nresult. These results validate existing signal-to-noise-and-distortion-ratio\n(SNDR) based rate analysis, establish the equivalence of information rates of\ncertain schemes, and demonstrate the evident benefits of using\ncomponent-multiplexing at high signal-to-noise-ratio (SNR). For double- and\nmulti-component schemes, the component power allocation strategies that\nmaximize the information rates are investigated. In particular, by utilizing a\npower allocation strategy, we prove that several multi-component schemes\napproach the high SNR capacity of the discrete-time Gaussian OIC under average\npower constraint to within 0.07 bits.\n