BER Performance Improvement in Coded-OFDM Systems Using Equalization Algorithms

2011 ◽  
Vol 403-408 ◽  
pp. 1028-1034 ◽  
Author(s):  
Bhasker Gupta ◽  
Davinder S. Saini
Keyword(s):  
Performance Improvement ◽  
Ofdm Systems ◽  
Zero Forcing ◽  
High Data ◽  
Use Of Time ◽  
Rate Transmission ◽  
Coded Ofdm ◽  
Frequency Selective Channels ◽  
Data Rate Transmission ◽  
Ber Performance

Intersymbol interference is a major cause to limit high data rate transmission in wireless communication. To avoid ISI OFDM is the preferred modulation technique. For frequency selective channels pure OFDM may not be sufficient to eliminate ISI. The use of time coding (interleaver and convolution coder) improves the ISI affected reception but do not eliminate ISI completely. The paper investigates the presence of equalizers to improve BER performance in ISI affected reception. The performance improvement is observed for two novel equalizers namely zero forcing equalizers and MMSE equalizers. Simulation results are presented to demonstrate the superiority of the CODED OFDM method with equalizers

scholarly journals Relationship between the voltage applied to MZM arms and the generation of optical frequency comb

2018 ◽  
Vol 7 (4.15) ◽  
pp. 405
Author(s):  
Yousif I. Hammadi ◽  
Tahreer S. Mansour
Keyword(s):  
Continuous Wave ◽  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Laser Source ◽  
Optical Frequency ◽  
High Data ◽  
Rate Transmission ◽  
Rf Signals ◽  
Rf Signal ◽  
Data Rate Transmission

In this study, an optical frequency comb source (OFCS) based on a dual-drive Mach–Zehnder modulator (MZM) is constructed and theoretically demonstrated. A mathematical model of the constructed OFCS is then built to investigate the effect of the peak-to-peak radio frequency (RF) signals applied to the MZM arms on the generated optical frequency comb (OFC) lines at the MZM output. A dual-drive MZM, a continuous wave laser source, and an RF signal source are included in the OFCS. The chirp parameter can be controlled and 64 comb lines generated at a comb spacing of 25 GHz by regulating voltages applied to the MZM arms. The developed OFCS is relatively simple but valuable. The generated OFC lines can be used for high data-rate transmission.  

60 GHz SoC/SoP radio system for high data-rate transmission

2010 ◽  
Vol 52 (3) ◽  
pp. 667-673 ◽  
Author(s):  
K. C. Eun ◽  
J.J. Lee ◽  
D. Y. Jung ◽  
S. J. Cho ◽  
H. Y. Kim ◽  
...  
Keyword(s):  
Data Rate ◽  
High Data Rate ◽  
60 Ghz ◽  
Radio System ◽  
High Data ◽  
Rate Transmission ◽  
Data Rate Transmission

Real-time Coherent Optical OFDM Receiver for Intradyne Detection in High Data Rate Transmission

2012 ◽  
Author(s):  
Noriaki Kaneda ◽  
Timo Pfau ◽  
Stephen Corteselli ◽  
Qi Yang ◽  
Andreas Leven ◽  
...  
Keyword(s):  
Real Time ◽  
Data Rate ◽  
High Data Rate ◽  
High Data ◽  
Rate Transmission ◽  
Optical Ofdm ◽  
Data Rate Transmission

scholarly journals Recent Progress in Silicon Photonics: A Review

ISRN Optics ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-27 ◽  
Author(s):  
Zhou Fang ◽  
Ce Zhou Zhao
Keyword(s):  
Integrated Circuits ◽  
Silicon Photonics ◽  
Recent Progress ◽  
State Of The Art ◽  
Low Cost ◽  
Photonic Integrated Circuits ◽  
High Data ◽  
Bandwidth Requirement ◽  
Rate Transmission ◽  
Data Rate Transmission

With the increasing bandwidth requirement in computing and signal processing, the inherent limitations in metallic interconnection are seriously threatening the future of traditional IC industry. Silicon photonics can provide a low-cost approach to overcome the bottleneck of the high data rate transmission by replacing the original electronic integrated circuits with photonic integrated circuits. Although the commercial promise has not been realized, this perspective gives huge impetus to the development of silicon photonics these years. This paper provides an overview of the progress and the state of the art of each component in silicon photonics, including waveguides, filters, modulators, detectors, and lasers, mainly in the last five years.

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