Range dependence of pulse position modulation in the presence of background noise

Marcin Jarzyna; Wojciech Zwolinski; Konrad Banaszek

doi:10.1117/12.2536130

12 July 2019 Range dependence of pulse position modulation in the presence of background noise

Marcin Jarzyna, Wojciech Zwolinski, Konrad Banaszek

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Proceedings Volume 11180, International Conference on Space Optics — ICSO 2018; 111805V (2019) https://doi.org/10.1117/12.2536130
Event: International Conference on Space Optics - ICSO 2018, 2018, Chania, Greece

Abstract

We identify the maximum attainable transmission rate of a noisy optical link employing the pulse position modulation (PPM) format with direct detection. We show that for a fixed background noise level it is possible to achieve the information rate directly proportional to the average detected signal power in the photon-starved regime. This implies inverse-square scaling with the distance, presenting a qualitative improvement over previously obtained estimates that scaled as the inverse of the fourth power of the distance. The necessary ingredients to achieve the improved mode of operation are the unrestricted optimization of the PPM order and the complete decoding of detection events to extract information from sequences containing multiple counts within one PPM frame. Importantly, information efficiency equivalent to high-order PPM formats can be attained using signals with uniformly distributed optical power processed with recently proposed structured optical receivers.

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Marcin Jarzyna, Wojciech Zwolinski, and Konrad Banaszek "Range dependence of pulse position modulation in the presence of background noise", Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111805V (12 July 2019); https://doi.org/10.1117/12.2536130

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KEYWORDS

Signal detection

Receivers

Modulation

Transmitters

Interference (communication)

Optical communications

Radio optics

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