Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"PAM modulation"”.
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Transmission Capacity Improvement for Single Photon Avalanche Diode-based Optical Communication Using PAM Modulation
… optical communication links that use intensity modulation with direct detection, the highest optical sensitivity is achieved using avalanche photodiodes. However, the excess noise generated within the avalanche photodiode (APD) limits the receiver sensitivity. Operating the APD above its …
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Finding the optimal demodulator under implementation constraints
… loss on the entire range of SNR when 2-PAM modulation is used, and its quantization thresholds linearly depend on the standard deviation of noise. We also derive a simple estimator of the relative capacity loss due to quantization, based on the high-rate limit. Then we consider the …
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Resonant Wavelength Tuning and CMOS Circuits for Silicon Photonic Transmitters with Microring Modulators
… impacting critical metrics such as optical modulation amplitude (OMA), extinction ratio (ER), and level separation mismatch ratio (RLM). This thesis comprehensively investigates the design, optimization, and control of MRM-based optical transmitters. First, the impact of MRM resonance …
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A new optimization uniformity for indoor visible light communication systems using optical attocells configuration
… and SNR respectively. Additionally, six various modulation techniques are studied to evaluate the proposed models, all modulations produced better BER (≤10−6) at data rate 30 Mbps, while the higher order modulations (L-PPM and M-PAM) produced higher data rate reaching up to 100 Gbps with a BER …
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The Effect of Receiver Nonlinearity and Nonlinearity Induced Interference on the Performance of Amplitude Modulated Signals
… of the probability density functions of M-PAM and M-QAM signals through an AWGN channel taking into account the impact of receiver nonlinearity. A change of variables technique is used to provide a relationship between the pdf of these signals with a linear receiver and the pdf with a …