Global ETD Search
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Showing 1 to 12 of 12 for “"OSNR"”.
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Robust communication in a time-varying noisy environment
… (SNRI) which is the ratio of Output SNR (OSNR) to Input SNR (ISNR). The OSNR and ISNR are the SNR at the output and input of the MAMF respectively. SNRI is maximized by maximizing OSNR since ISNR is fixed for a received signal and noise. The OSNR of a MAMF is a function of the noise …
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Detector design and estimation for a digital communication system
… to maximize the Output Signal-to-Noise Ratio (OSNR). The relative measure of comparison for the two systems is the Signal-to-Noise Ratio Improvement (SNRI). The SNRI is the ratio of the OSNR, which is measured at the output of the receiver, to the Input Signal-to-Noise Ratio (ISNR), which is …
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Multi slot amplitude coding technique for high speed optical fiber communication system
… and 25.5 dB for optical signal-to-noise ratio (OSNR). The improvement of 3.5 dB for RS and 3.7 dB for OSNR are obtained when optimize level spacing is implemented. When compared to DCDM, the spectral width is reduced by around 25%, not less than 55% improvement of chromatic dispersion (CD) …
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Multi-impairment and multi-channel optical performance monitoring
… (PMD) and optical signal-to-noise ratio (OSNR) in 40Gbit/s multi0channel systems. An analytical model is developed to describe the monitoring technique which allows the prediction of the measurement range. The experimental results are given for group velocity dispersion (GVD), differential …
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Non-Binary Coded Modulation for FMF-Based Coherent Optical Transport Networks
… achievable optical-signal-to-noise ratio (OSNR). So there exists a nonlinear capacity limit on the standard single mode fiber (SSMF). In order to satisfy never ending capacity demands, there are several attempts to employ additional degrees of freedom in transmission system, such as …
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High Data Rate Coherent Optical OFDM System for Long-Haul Transmission
… distance on the Optical-Signal-to-Noise-Ratio (OSNR), and the relation of BER and OSNR with regard to the transmission distance.</p>
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Advanced optical techniques for high capacity transmission
… it improves the optical signal-to-noise ratio (OSNR) and significantly reduces the nonlinear intrachannel effects of the transmission systems. The main body of the experimental work is concerned with nonlinear optical switching using the nonlinear optical loop mirrors (NOLMs). A number of …
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Control of a Nonlinear Mach-Zehnder Interferometer for Regeneration Using Digital Signal Processing
… analyzer (OMA). Signals are collected at an OSNR of 20.7 dB, corresponding to an error free condition. Frequency offset and phase estimation is performed using the collected data with both the fast Fourier transform (FFT) and moving average method at 40 GSa/s and the proposed method at 312.5 …
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Remote temperature sensing with low-threshold-power using erbium-doped fiber laser
… of less than 1.2 dB over a 30 minute duration, OSNR of 49 dB and power efficiency, up to 0.07%. With this fiber laser, a temperature sensor with a sensitivity of 10.6 pm/°C is realized for a temperature range from 30 °C to 90 °C which has potential to be applied in the oil and gas field. This …
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Cascaded ROADM Filter Replication and the Effects of Statistical Variations in the Response of Cascaded ROADMs on 100 Gb/s DP-QPSK System Performance
… shift was explored by determining the required OSNR for a BER of 1x10-3 at different bandwidths and amounts of center frequency shift. The overall range of ROSNR was 2.2 dB, after which there was breakdown in the Forward Error Correction coding. It was found that for the passband impairments, …
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Adaptive signal subspace digital receivers for communication in time-varying noise
… is defined as the output signal-to-noise ratio (OSNR) measured at the output of the filtering stage over the input signal-to-noise ratio (ISNR) measured at the input to the pre-filtering stage. We demonstrate through simulation that the signal subspace version can be more robust with respect to …
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Realizace testbedu pro datové přenosy
Cílem této bakalářské práce je realizace testbedu pro koherentní optické přenosy, se zaměřením na modulace a přenosové parametry. Je popsán současný stav koherentních přenosových systémů, včetně jejich klíčových komponent. Dále jsou detailně rozebrány pokročilé modulační formáty, zejména QPSK a …