nk-pulse position modulation for optical wireless communication
نویسندگان
چکیده
منابع مشابه
Differential Multi-Pulse Position Modulation for Free Space Optical Communication
In order to improve the laser output power in free space optical communication, it is necessary to improve the power efficiency of laser modulation as much as possible, in the case of the limitation of the laser. In this paper, based on the theory of pulse position modulation (PPM), a differential multi-pulse position modulation(DMPPM) scheme was designed, by consulting the structure characteri...
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We propose a novel differential amplitude pulse-position modulation (DAPPM) for indoor optical wireless communications. DAPPM yields advantages over PPM, DPPM, and DH-PIMα in terms of bandwidth requirements, capacity, and peak-to-average power ratio (PAPR). The performance of a DAPPM system with an unequalized receiver is examined over nondispersive and dispersive channels. DAPPM can provide be...
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A family of modulation formats is derived by combining pulse-position modulation (PPM) with multilevel dual-polarization signal constellations. With 16-PPM, gains of up to 5.4 dB are obtained over dual-polarization QPSK, at the cost of reduced spectral efficiency.
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Intensity modulation with direct modulation (IM/DD) favors low duty cycle modulation schemes such as pulse position modulation (PPM) and multiple PPM(MPPM).In this paper,the channel model over IM/DD is introduced. Then, a brief summary is given about some of the modulation techniques used in this area. Finally, some of the pulse position based coded modulation techniques are rewiewed.
متن کاملDifferential pulse-position modulation for power-efficient optical communication
In this paper, we examine the use of differential pulse-position modulation (DPPM) for optical communication systems using intensity modulation with direct detection in the presence of additive white Gaussian noise. We present expressions for the error probability and power spectral density of DPPM. We show that for a given bandwidth, DPPM requires significantly less average power than pulse-po...
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ژورنال
عنوان ژورنال: Electronics Letters
سال: 2005
ISSN: 0013-5194
DOI: 10.1049/el:20051726