Photonic generation and wireless transmission of different pulse modulation formats for high-speed impulse radio ultrawideband over fiber systems

2011 ◽  
Author(s):  
Shizhong Xie ◽  
Hongwei Chen ◽  
Minghua Chen ◽  
Sigang Yang ◽  
Pengxiao Li
Keyword(s):  
High Speed ◽  
Impulse Radio ◽  
Wireless Transmission ◽  
Pulse Modulation ◽  
Modulation Formats ◽  
Photonic Generation

3.125 Gb/s Impulse Radio Ultra-Wideband Photonic Generation and Distribution Over a 50 km Fiber With Wireless Transmission

2010 ◽  
Vol 20 (2) ◽  
pp. 127-129 ◽  
Author(s):  
Timothy Braidwood Gibbon ◽  
Xianbin Yu ◽  
Romeo Gamatham ◽  
Neil Guerrero Gonzalez ◽  
Roberto Rodes ◽  
...  
Keyword(s):  
Impulse Radio ◽  
Wireless Transmission ◽  
Ultra Wideband ◽  
Photonic Generation

A Novel Approach to Photonic Generation and Modulation of Ultra-Wideband Pulses

Frequenz ◽  
2016 ◽  
Vol 70 (1-2) ◽  
Author(s):  
Peng Xiang ◽  
Hao Guo ◽  
Dalei Chen ◽  
Huatao Zhu
Keyword(s):  
Phase Modulation ◽  
Pulse Generator ◽  
Narrow Band ◽  
Ultra Wideband ◽  
Interference Avoidance ◽  
Pulse Modulation ◽  
Modulation Formats ◽  
Notch Band ◽  
Novel Approach ◽  
Photonic Generation

AbstractA novel approach to photonic generation of ultra-wideband (UWB) signals is proposed in this paper. The proposed signal generator is capable of generating UWB doublet pulses with flexible reconfigurability, and many different pulse modulation formats, including the commonly used pulse-position modulation (PPM) and bi-phase modulation (BPM) can be realized. Moreover, the photonic UWB pulse generator is capable of generating UWB signals with a tunable spectral notch-band, which is desirable to realize the interference avoidance between UWB and other narrow band systems, such as Wi-Fi. A mathematical model describing the proposed system is developed and the generation of UWB signals with different modulation formats is demonstrated via computer simulations.

scholarly journals Systematic Performance Comparison of (Duobinary)-PAM-2,4 Signaling under Light and Strong Opto-Electronic Bandwidth Conditions

Photonics ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 81
Author(s):  
Ramón Gutiérrez-Castrejón ◽  
Md Ghulam Saber ◽  
Md Samiul Alam ◽  
Zhenping Xing ◽  
Eslam El-Fiky ◽  
...  
Keyword(s):  
Optical Networks ◽  
High Speed ◽  
Performance Comparison ◽  
Sampling Point ◽  
Bit Rate ◽  
Performance Limits ◽  
Specific System ◽  
Rate System ◽  
Modulation Formats ◽  
Modulation Format

We present a systematic comparison of PAM-2 (NRZ), Duobinary-PAM-2, PAM-4, and Duobinary-PAM-4 (duo-quaternary) signaling in the context of short-reach photonic communications systems using a Mach–Zehnder modulator as transmitter. The effect on system performance with a relaxed and constrained system’s opto-electronic bandwidth is analyzed for bit rates ranging from 20 to 116 Gb/s. In contrast to previous analyses, our approach employs the same experimental and simulation conditions for all modulation formats. Consequently, we were able to confidently determine the performance limits of each format for particular values of bit rate, system bandwidth, transmitter chirp, and fiber dispersion. We demonstrate that Duobinary-PAM-4 is a good signaling choice only for bandwidth-limited systems operating at relatively high speed. Otherwise, PAM-4 represents a more sensible choice. Moreover, our analysis put forward the existence of transition points: specific bit rate values where the BER versus bit rate curves for two different formats cross each other. They indicate the bit rate values where, for specific system conditions, switching from one modulation to another guarantees optimum performance. Their existence naturally led to the proposal of a format-selective transceiver, a component that, according to network conditions, operates with the most adequate modulation format. Since all analyzed modulations share similar implementation details, signaling switching is achieved by simply changing the sampling point and threshold count at the receiver, bringing flexibility to IM/DD-based optical networks.

Simulation on the Regulating Characteristics of the Pulse Modulation Hydraulic Hammer

2011 ◽  
Vol 422 ◽  
pp. 176-183
Author(s):  
Gang Wang ◽  
Yu Wan Cen
Keyword(s):  
Time Delay ◽  
Simulation Model ◽  
Impact Energy ◽  
High Speed ◽  
Impact Frequency ◽  
Pulse Modulation ◽  
Motion Equations ◽  
Hydraulic Hammer ◽  
Working Frequency ◽  
Simulation Results

To improve the regulating characteristics of impact energy, simplify structure of hydraulic hammer, a new pulse modulation hydraulic hammer is presented in the paper which can help regulate its impact frequency easily. The motion equations of the hydraulic hammer are established, its simulation model is obtained and the dynamic simulation is carried out on AMESim. The dynamics of high-speed ON/OFF valve is taken into account in the simulation model. The tendency of simulation results conforms to experimental results; it shows that the pulse modulation hydraulic hammer is feasible, and the hydraulic hammer model is reasonable. The time delay in high working frequency is also analyzed.

“High-speed optical and wireless transmission - challenges and achievements”

2016 ◽  
Author(s):  
Oskars Ozolins ◽  
Xiaodan Pang ◽  
Miguel Iglesias Olmedo ◽  
Aleksejs Udalcovs ◽  
Aditya Kakkar ◽  
...  
Keyword(s):  
High Speed ◽  
Wireless Transmission

scholarly journals THz Wireless Transmission Systems Based on Photonic Generation of Highly Pure Beat-Notes

2016 ◽  
Vol 8 (5) ◽  
pp. 1-8 ◽  
Author(s):  
Shi Jia ◽  
Xianbin Yu ◽  
Hao Hu ◽  
Jinlong Yu ◽  
Toshio Morioka ◽  
...  
Keyword(s):  
Wireless Transmission ◽  
Transmission Systems ◽  
Photonic Generation
Sign in / Sign up

Export Citation Format

Share Document