Optical Generation of 12-Tupling Millimeter-Wave Signal without Optical Filtering

2016 ◽  
Vol 37 (3) ◽  
Author(s):  
Xiaogang Chen ◽  
Lu Xia ◽  
Dexiu Huang
Keyword(s):  
Performance Improvement ◽  
Millimeter Wave ◽  
System Performance ◽  
Suppression Ratio ◽  
Extinction Ratio ◽  
Optical Filtering ◽  
Optical Generation ◽  
Spurious Suppression ◽  
Simulation Results ◽  
The Impact

AbstractA novel scheme is proposed for frequency 12-tupling millimeter-wave generation based on two cascaded dual-parallel Mach–Zehnder modulators (DP-MZM) without optical filtering. The impact of imperfect extinction ratio (EXT) of each sub-MZM on optical sideband suppression ratio (OSSR) and RF spurious suppression ratio (RSSR) is investigated. Theoretical and simulation results show that the proposed scheme is feasible and system performance is insensitive to EXT when EXT is not less than 29 dB. Optical mm-wave with 26.4 dB OSSR and 20.3 dB RSSR can be obtained when the DPMZM is consisted of two sub-MZMs with 30 dB EXT. Furthermore, the system performance improvement through sub-MZM modulation index enhancement is analyzed.

Performance improvement of octupling millimeter wave generation through modulation index optimization

2018 ◽  
Vol 32 (34n36) ◽  
pp. 1840104
Author(s):  
Xiaogang Chen
Keyword(s):  
Performance Improvement ◽  
Millimeter Wave ◽  
Suppression Ratio ◽  
Extinction Ratio ◽  
Wave Generation ◽  
Modulation Index ◽  
Theoretical Derivation ◽  
Optical Generation ◽  
Spurious Suppression ◽  
Mach Zehnder Modulator

Performance improvement for optical generation of octupling millimeter wave signal based on dual-parallel Mach–Zehnder modulator (MZM) without optical filtering through optimization of modulation index of MZM is proposed. Theoretical derivation and simulation verification are provided for the octupling millimeter wave generation scheme, extinction ratio (EXT) of practical MZM is considered. The effect of imperfect EXT of commercially available MZM on optical sideband suppression ratio (OSSR) and RF spurious suppression ratio (RSSR) of the generated octupling optical millimeter wave is investigated. The results show that the performance of generated octupling millimeter wave with modulation index optimization is stable and insensitive to the EXT of MZM. While for the approach without modulation index enhancement, an additional filter is required to generate high quality optical millimeter wave.

scholarly journals Iterative Approach for Performance Improvement of PLC Systems

2018 ◽  
Vol 7 (4.4) ◽  
pp. 7
Author(s):  
Yu Min Hwang ◽  
Young Ghyu Sun ◽  
Issac Sim ◽  
Jin Young Kim
Keyword(s):  
Performance Improvement ◽  
System Performance ◽  
High Speed ◽  
Impulsive Noise ◽  
Multipath Fading ◽  
Power Line Communication ◽  
Zero Forcing ◽  
Improve Performance ◽  
Turbo Equalizer ◽  
Simulation Results

In this paper, we propose Turbo equalizer scheme using zero-forcing (ZF) and simulate in power line communication (PLC) systems with high speed. Due to impulsive noise and multipath fading in PLC systems, inter-symbol interference (ISI) happens. We employ Turbo equalizer scheme to get over ISI and improve performance. From simulation results, it is confirmed that the proposed Turbo equalizer can remarkably improve PLC system performance.  

A Novel DOA Estimation Method for Wideband Signals

2011 ◽  
Vol 403-408 ◽  
pp. 2861-2865
Author(s):  
Fu Gang Liu ◽  
Ming Diao
Keyword(s):  
Performance Improvement ◽  
Estimation Method ◽  
Doa Estimation ◽  
Estimation Bias ◽  
Wideband Signals ◽  
Significant Performance ◽  
Simulation Results ◽  
The Impact ◽  
Real Time Application ◽  
Conventional Algorithm

For direction of arrival (DOA) estimation of wideband signals, the traditional algorithms’ estimating accuracy and complexity were mainly affected by pre-estimation of DOA. By forming an angle set which elements were arithmetic progressions in the range of possible arriving angles, the algorithm used the new angle vector to replace the preliminary estimation of arriving angles. It can avoid the impact of pre-estimation bias on performance of DOA estimation and greatly reduce the amount of computation and the consumed time for DOA estimation to favor the real-time application of wideband DOA estimation. The simulation results showed that the proposed algorithm was able to provide significant performance improvement over the conventional algorithm.

scholarly journals Performance Analysis of Cognitive Relay-Assisted Ambient Backscatter with MRC over Nakagami-m Fading Channels

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3447
Author(s):  
Dinh-Thuan Do ◽  
Thanh-Luan Nguyen ◽  
Byung Moo Lee
Keyword(s):  
Performance Analysis ◽  
Fading Channels ◽  
System Performance ◽  
Throughput Performance ◽  
Maximum Ratio Combining ◽  
Backscatter Communication ◽  
Simulation Results ◽  
Outage Probabilities ◽  
The Impact ◽  
Ambient Backscatter

This study presents ambient backscatter communication (AmBC) network as a concept of "modulation in the air" that has drawn growing interest by both academia and industry recently. In particular, we investigate and analyze an AmBC system relying on cognitive radio, where the primary destination is equipped with multiple antennas and maximum ratio combining (MRC). A wireless powered relay is necessary to serve both primary and secondary destinations. Benefiting from the surrounding radio frequency (RF) source, the relay can support the backscattering signal. To facilitate the performance analysis of received nodes, this study presents exact closed-form expressions of the outage probability. For comparison, the outage and throughput performance of these nodes are considered in numerical simulation. Taking advantage of the AmBC technology, the impact of the backscatter ratio on system performance is carefully studied considering various other parameters. Simulation results demonstrate the exactness of the derived outage probabilities and show that the optimal throughput performance can be achieved at specific parameters.

Performance Analysis of 80 GHz-Millimeter Wave Radio over Dispersive Fiber

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Pooja Goel ◽  
Rahul Kaushik
Keyword(s):  
Radio Frequency ◽  
Millimeter Wave ◽  
Suppression Ratio ◽  
Modulation Depth ◽  
Signal Transmission ◽  
Single Mode ◽  
Wave Signal ◽  
Received Power ◽  
High Modulation ◽  
The Impact

AbstractThe generation of 80 GHz millimeter wave (mm-wave) signal and its transmission over single mode fiber (SMF) is presented. The mm-wave signal is generated with dual parallel dual drive Mach Zehnder modulators using frequency quadrupling of 20 GHz radio frequency signal. Transmission of generated mm-wave signal over SMF has been investigated. The impact of varying modulation depth on optical side band suppression ratio and radio frequency spurious suppression ratio for different extinction ratios (ER) is studied. Further, the impact of dispersion, on received power is also analyzed. Error analysis between analytical and simulation results is carried out. It has been observed, that increasing ER leads to reduction in both peak error and mean error and the received power is reduced under the combined effect of second and third order dispersion at very high modulation depth.

Design of high transformation ratio millimeter-wave integrated transformers

2012 ◽  
Vol 4 (2) ◽  
pp. 233-239 ◽  
Author(s):  
Bernardo Leite ◽  
Eric Kerhervé ◽  
Jean-Baptiste Bégueret ◽  
Didier Belot
Keyword(s):  
Millimeter Wave ◽  
Complementary Metal Oxide Semiconductor ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Transformation Ratio ◽  
High Transformation ◽  
Overall Performance ◽  
Simulation Results ◽  
Different Diameters ◽  
The Impact

A novel topology for millimeter-wave-integrated transformers is proposed. The windings are stacked and secondaries are designed with different trace widths and different diameters from that of the primary, in order to obtain relatively high-inductance transformation ratios. Measurement and simulation results of 65 nm Complementary Metal Oxide Semiconductor (CMOS) and 130 nm combination of Bipolar and CMOS (BiCMOS) transformers present the impact of this structure on the inductances, quality factor, coupling coefficient, and minimum insertion loss. Within certain limits on the trace widths, it is shown that the proposed topology not only increases the transformation ratio but also improves its overall performance.

scholarly journals Measuring Hydrometeors Using a Precipitation Microphysical Characteristics Sensor: Sampling Effect of Different Bin Sizes on Drop Size Distribution Parameters

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Xichuan Liu ◽  
Taichang Gao ◽  
Yuntao Hu ◽  
Xiaojian Shu
Keyword(s):  
Drop Size ◽  
Rain Rate ◽  
Monte Carlo Model ◽  
Rain Gauge ◽  
Sampling Schemes ◽  
Distribution Parameters ◽  
Optimum Sampling ◽  
Simulation Results ◽  
The Impact ◽  
Good Agreement

In order to improve the measurement of precipitation microphysical characteristics sensor (PMCS), the sampling process of raindrops by PMCS based on a particle-by-particle Monte-Carlo model was simulated to discuss the effect of different bin sizes on DSD measurement, and the optimum sampling bin sizes for PMCS were proposed based on the simulation results. The simulation results of five sampling schemes of bin sizes in four rain-rate categories show that the raw capture DSD has a significant fluctuation variation influenced by the capture probability, whereas the appropriate sampling bin size and width can reduce the impact of variation of raindrop number on DSD shape. A field measurement of a PMCS, an OTT PARSIVEL disdrometer, and a tipping bucket rain Gauge shows that the rain-rate and rainfall accumulations have good consistencies between PMCS, OTT, and Gauge; the DSD obtained by PMCS and OTT has a good agreement; the probability of N0, μ, and Λ shows that there is a good agreement between the Gamma parameters of PMCS and OTT; the fitted μ-Λ and Z-R relationship measured by PMCS is close to that measured by OTT, which validates the performance of PMCS on rain-rate, rainfall accumulation, and DSD related parameters.

scholarly journals Complex System Governance as a Framework for Asset Management

2021 ◽  
Vol 13 (15) ◽  
pp. 8502
Author(s):  
Polinpapilinho F. Katina ◽  
James C. Pyne ◽  
Charles B. Keating ◽  
Dragan Komljenovic
Keyword(s):  
Complex System ◽  
Performance Improvement ◽  
Asset Management ◽  
System Performance ◽  
Future Research ◽  
Complex Organizations ◽  
Potential Relationship ◽  
Structured Approach

Complex system governance (CSG) is an emerging field encompassing a framework for system performance improvement through the purposeful design, execution, and evolution of essential metasystem functions. The goal of this study was to understand how the domain of asset management (AsM) can leverage the capabilities of CSG. AsM emerged from engineering as a structured approach to organizing complex organizations to realize the value of assets while balancing performance, risks, costs, and other opportunities. However, there remains a scarcity of literature discussing the potential relationship between AsM and CSG. To initiate the closure of this gap, this research reviews the basics of AsM and the methods associated with realizing the value of assets. Then, the basics of CSG are provided along with how CSG might be leveraged to support AsM. We conclude the research with the implications for AsM and suggested future research.

Sign in / Sign up

Export Citation Format

Share Document