Results 211 to 220 of about 34,611 (261)

Wide-Bandwidth, Enhanced-Quality Wireless Signal Detection with Low-Bandwidth Devices

2023 Optical Fiber Communications Conference and Exhibition (OFC), 2023
We discuss a new method for detecting high-bandwidth wireless signals with low-bandwidth electronics. We experimentally demonstrate the detection of 24 GBd-QPSK Nyquist data with 4 GHz electronics and a Q-factor enhancement of 2.2 dB.
Mohamed I. Hosni, Janosch Meier, Younus Mandalawi, Karanveer Singh, Paulomi Mandal, Evans Baidoo, Ayman M. Mokhtar, Thomas Schneider 0010   +7 more
openaire   +2 more sources

Bandwidth Enhancement By In-Fiber Amplification

SPIE Proceedings, 1988
Experimental investigation has been carried out demonstrating mode-selective amplification in fibers by the backward stimulated Raman scattering process, thereby improving signal bandwidth in the fiber compared to an unamplified transmission. The feasibility of simultaneously amplifying multiple data channels using a single flashlamp-pumped dye laser ...
Cheng-Huei Lin, Melvin A. Nelson
openaire   +1 more source

Antenna matching for bandwidth enhancement

2007 6th International Conference on Antenna Theory and Techniques, 2007
A matching technique which simultaneously fulfills 2 tasks, matching and enhancement of the operation frequency band, is presented in this paper. As an example, matching for a 5-band mobile phone (GSM 850, GSM 900, GSM 1800, GSM 1900 and WCDMA 2100) has been examined. Two very simple inverted-L antennas with input impedances in range of 2 - j10 to 10 +
Kravchenko, Roman, Stadler, M., Rak, F.
openaire   +2 more sources

Bandwidth enhancement of Dielectric Resonator Antenna (DRA)

2013 IEEE International Conference on RFID-Technologies and Applications (RFID-TA), 2013
Presently, wireless systems operating in the microwave range require relatively larger physical size antenna. For instance, the present mobile systems suffer spatial problems due to their relatively voluminous antennas. This has prompted bandwidth enhancement and size reduction of Dielectric Resonator Antenna (DRA) of various wireless applications ...
A. Sadiq Batcha, Ching Kwang Lee, Gobi Vetharatnam   +2 more
openaire   +2 more sources

Gain and Bandwidth Enhanced Class-AB OTAs

2019 IEEE 62nd International Midwest Symposium on Circuits and Systems (MWSCAS), 2019
Efficient class-AB OTAs with enhanced gain bandwidth, open loop gain, output current, and slew rate are presented. They are based on a g m -boosting technique (at least factor of two) and also use dynamically biased cascode transistors to achieve high gain and output currents much larger than the bias current.
Shirin Pourashraf, Jaime Ramírez-Angulo, Alejandro Roman-Loera, Manaswini Gangineni   +3 more
openaire   +1 more source

Aperture-Coupled Reflectarrays with Enhanced Bandwidth Features

Journal of Electromagnetic Waves and Applications, 2008
An extensive analysis is performed on the aperture-coupled reflectarray configuration to highlight and quantify the bandwidth enhancement due to the use of reduced inter-element spacings. Bandwidth extension is directly evaluated on the phase curves relative to the reflection coefficient against frequency for different lengths of the tuning line.
VENNERI, FRANCESCA, COSTANZO, Sandra, DI MASSA, Giuseppe, AMENDOLA, Gian Domenico   +3 more
openaire   +2 more sources

Enhancing TCP for networks with guaranteed bandwidth services

Computer Networks, 2004
In this paper we consider TCP based applications that use bandwidth guarantees, but can also benefit from any additional best-effort service offered by the network. We show that default TCP cannot offer such applications the aggregate throughput offered by the two services.
Yujie Zhu, Aravind Velayutham, Oyebamiji Oladeji, Raghupathy Sivakumar   +3 more
openaire   +3 more sources

Carrier Aggregation for Enhancement of Bandwidth in 4G Systems

2013
Since ITU-R had officially completed the formal definition of Third Generation (3G) systems in 1997, focus has been shifted to the Fourth Generation (4G) wireless cellular systems. The paper provides an overview of the different aspects of the proposed carrier aggregation technique, which would enable LTE-A systems to fully utilize the wider bandwidths
Jolly Parikh, Anuradha Basu
openaire   +2 more sources

Bandwidth enhancement in multimode fibers

Frontiers in Optics 2009/Laser Science XXV/Fall 2009 OSA Optics & Photonics Technical Digest, 2009
We report on a substantial improvement in the bandwidth of graded index multimode fibers caused by a controlled intentional mode coupling. Scattering from micron size core inclusions induce the mode coupling with minimum power loss.
openaire   +1 more source

Bandwidth-enhanced multimode fiber

Optical Engineering, 2007
By designing multiple single-mode cores across the multimode fiber core area, this new multimode fiber can support only the fundamental mode or fewer low-order modes propagation to some extent. Therefore, the modal dispersion of the multimode fiber has been suppressed greatly, and the bandwidth is enhanced 6.5 times.
openaire   +1 more source