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8 March 2018 Multiband DSB-SC modulated radio over IsOWC link with coherent homodyne detection
Zong Kang, Jiang Zhu
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Proceedings Volume 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application; 106975H (2018) https://doi.org/10.1117/12.2309301
Event: Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 2017, Nanjing, China
Abstract
In this paper, we present a multiband double sideband-suppressed carrier (DSB-SC) modulated radio over intersatellite optical wireless communication (IsOWC) link with coherent homodyne detection. The proposed system can provide the transparent transport of multiband radio frequency (RF) signals with higher linearity and better receiver sensitivity than the intensity modulated with direct detection (IM/DD) scheme. The full system model and the exactly analytical expression of signal to noise and distortion ratio (SNDR) are derived considering the third-order intermodulation product and amplifier spontaneous emission (ASE) noise. The finite extinction ratio (ER) of Mach-Zehnder Modulator (MZM) and the saturation property of erbium doped fiber amplifier (EDFA) are also considered. Numerical results of SNDR with various numbers of subchannels and ERs are given. Results indicate that the optimal modulation index exists to maximize the SNDR and the power of local oscillator (LO) carrier should be within an appropriate range.
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Zong Kang and Jiang Zhu "Multiband DSB-SC modulated radio over IsOWC link with coherent homodyne detection", Proc. SPIE 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 106975H (8 March 2018); https://doi.org/10.1117/12.2309301
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KEYWORDS
Modulation
Radio optics
Homodyne detection
Free space optics
Intermodulation
Receivers
Transmitters
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