Low-complexity adaptive equalization for high-speed chip-to-chip communication paths by zero-forcing of jitter components

2006 ◽  
Vol 54 (9) ◽  
pp. 1554-1557 ◽  
Author(s):  
T. Toifl ◽  
M. Schmatz ◽  
C. Menolfi
Keyword(s):  
High Speed ◽  
Low Complexity ◽  
Adaptive Equalization ◽  
Zero Forcing ◽  
Communication Paths

scholarly journals COMPARATIVE ANALYSIS OF MODULATION SCHEMES USING ADAPTIVE EQUALIZATION AS FADING MITIGATION TECHNIQUE

2012 ◽  
pp. 25-31
Author(s):  
SABITA NAHATA ◽  
SUBRATA BHATTACHARYA
Keyword(s):  
Comparative Analysis ◽  
Data Transmission ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Multipath Fading ◽  
Symbol Error Rate ◽  
Adaptive Equalization ◽  
Modulation Scheme ◽  
Modulation Schemes ◽  
Mitigation Technique

Inter-symbol interference (ISI) due to multipath fading is a vital problem in high-speed wireless communication which restricts communication quality and capacity. Therefore, in addition to choosing a fading mitigation technique, it is also important to strategically select a modulation scheme for effective data transmission. Recent literature review on wireless standards, such as 3G and 4G indicates that QAM and QPSK are suitable choices for data transmission. In this paper, a comparative analysis on selected modulation schemes is performed in a fading environment. The mitigation of fading is done using adaptive equalization technique. Also, we show that the signal to noise ratio (SNR) is an important parameter to choose. It is observed that, even when an adaptive equalizer is used at the receiver, a very low SNR gives very high symbol error rate (SER). We derive some important conclusions from our simulation result: QPSK shows minimum SER, whereas 256-PSK and 256-PAM perform worse. Given its spectral efficiency and a low SER, the best choice is 256- QAM.

A Low-Complexity Distributed-MIMO Testbed Based on High-Speed Sigma–Delta-Over-Fiber

2019 ◽  
Vol 67 (7) ◽  
pp. 2861-2872 ◽  
Author(s):  
Ibrahim Can Sezgin ◽  
Martin Dahlgren ◽  
Thomas Eriksson ◽  
Mikael Coldrey ◽  
Christina Larsson ◽  
...  
Keyword(s):  
High Speed ◽  
Low Complexity ◽  
Sigma Delta

scholarly journals Filtered Multitone Modulation Underwater Acoustic Communications Using Low-Complexity Channel-Estimation-Based MMSE Turbo Equalization

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2714 ◽  
Author(s):  
Lin Sun ◽  
Mei Wang ◽  
Guoheng Zhang ◽  
Haisen Li ◽  
Lan Huang
Keyword(s):  
Channel Estimation ◽  
Simulation Analysis ◽  
Multipath Propagation ◽  
Minimum Mean Square Error ◽  
Real Data ◽  
Low Complexity ◽  
Turbo Equalization ◽  
Adaptive Equalization ◽  
Communication Performance ◽  
Underwater Acoustic

Filtered multitone (FMT) modulation divides the communication band into several subbands to shorten the span of symbols affected by multipath in underwater acoustic (UWA) communications. However, there is still intersymbol interference (ISI) in each subband of FMT modulation degrading communication performance. Therefore, ISI suppression techniques must be applied to FMT modulation UWA communications. The suppression performance of traditional adaptive equalization methods often exploited in FMT modulation UWA communications is limited when the effect of ISI spans tens of symbols or large constellation sizes are used. Turbo equalization consisting of adaptive equalization and channel decoding can improve equalization performance through information exchanging and iterative processes. To overcome the shortcoming of traditional minimum mean square error (MMSE) equalization and effectively suppress the ISI with relatively low computation complexity, an FMT modulation UWA communication using low-complexity channel-estimation-based (CE-based) MMSE turbo equalization is proposed in this paper. In the proposed method, turbo equalization is first exploited to suppress the ISI in FMT modulation UWA communications, and the equalizer coefficients of turbo equalization are adjusted using the low-complexity CE-based MMSE algorithm. The proposed method is analyzed in theory and verified by simulation analysis and real data collected in the experiment carried out in a pool with multipath propagation. The results demonstrate that the proposed method can achieve better communication performance with a higher bit rate than the FMT modulation UWA communication using traditional MMSE adaptive equalization.

scholarly journals Layer Morphology and Ink Compatibility of Silver Nanoparticle Inkjet Inks for Near-Infrared Sintering

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 892
Author(s):  
Dieter Reenaers ◽  
Wouter Marchal ◽  
Ianto Biesmans ◽  
Philippe Nivelle ◽  
Jan D’Haen ◽  
...  
Keyword(s):  
Silver Nanoparticle ◽  
High Speed ◽  
Processing Time ◽  
Near Infrared ◽  
Printed Electronics ◽  
Low Cost ◽  
Low Complexity ◽  
Post Processing ◽  
Drop On Demand ◽  
Processing Step

The field of printed electronics is rapidly evolving, producing low cost applications with enhanced performances with transparent, stretchable properties and higher reliability. Due to the versatility of printed electronics, industry can consider the implementation of electronics in a way which was never possible before. However, a post-processing step to achieve conductive structures—known as sintering—limits the production ease and speed of printed electronics. This study addresses the issues related to fast sintering without scarifying important properties such as conductivity and surface roughness. A drop-on-demand inkjet printer is employed to deposit silver nanoparticle-based inks. The post-processing time of these inks is reduced by replacing the conventional oven sintering procedure with the state-of-the-art method, named near-infrared sintering. By doing so, the post-processing time shortens from 30–60 min to 6–8 s. Furthermore, the maximum substrate temperature during sintering is reduced from 200 °C to 120 °C. Based on the results of this study, one can conclude that near-infrared sintering is a ready-to-industrialize post-processing method for the production of printed electronics, capable of sintering inks at high speed, low temperature and with low complexity. Furthermore, it becomes clear that ink optimization plays an important role in processing inkjet printable inks, especially after being near-infrared sintered.

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