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السجلات المعروضة 831 -- 840 من 874
A USRP-based experimental testbed for OFDM systems impaired by I/Q imbalance
(
IEEE
, 2013 , Conference Paper)
In this paper, an experimental testbed for packet based OFDM systems is proposed using USRP RF front-ends. I/Q imbalance estimation and compensation algorithms are implemented at the receiver by manually injecting I/Q ...
Digital baseband compensation of frequency-dependent joint TX/RX I/Q imbalance in beamforming MIMO OFDM transceivers
(
IEEE
, 2012 , Conference Paper)
In this paper, we investigate the effects of asymmetric frequency-dependent joint transmit-receive I/Q imbalance on the performance of beamforming MIMO-OFDM systems. We derive the throughput-maximizing transmit/receive ...
SINR analysis for beamforming OFDM systems under joint transmit-receive I/Q imbalance
(
IEEE
, 2012 , Conference Paper)
In this paper, we derive an analytical expression for the subcarrier average SINR of a beamforming OFDM system in the presence of joint transmit-receive I/Q imbalance. The derived expression quantifies the impact of the ...
Hybrid thin-films of graphene materials and metallic nanowires for next generation transparent electrodes
(
Optics InfoBase
, 2013 , Conference Paper)
We report advances in the fabrication and characterization of transparent conductive electrodes based on thin-films of metallic nanowires (copper and silver) encapsulated with graphene, graphene oxide, and reduced graphene ...
Towards bandwidth guaranteed energy efficient data center networking
(
Springer
, 2015 , Article)
The data center network connecting the servers in a data center plays a crucial role in orchestrating the infrastructure to deliver peak performance to users. In order to meet high performance and reliability requirements, ...
A new tracking technique for mechanical angle measurement
(
Elsevier
, 2014 , Article)
Resolvers and other types of sine/cosine encoders are used for measurement of mechanical angles. These devices produce quadrature signals in the form of sine and cosine of the unknown angle, and require converters to extract ...
A low power temperature sensor based on a voltage to time converter cell
(
IEEE
, 2013 , Conference Paper)
In this paper we propose a temperature sensor, based on a voltage to time converter cell (VTC). A VTC is frequently employed in time to digital converters for generating a delay that is proportional to the input voltage. ...
Angular position measurement using resolvers together with a robust linearization technique
(
Institute of Electrical and Electronics Engineers Inc.
, 2015 , Conference Paper)
Resolvers are used for both absolute angular and linear position sensing. A robust amplitude to phase converter is described for the determination of position from the sine and cosine output signals of the resolver. The ...
A low power oscillator based temperature sensor for RFID applications
(
IEEE Computer Society
, 2013 , Conference Paper)
In this paper we present a temperature sensor based on a ring oscillator. The ring oscillator uses the CMOS thyristor delay element and has an extremely low power consumption of about 47nW at room temperature with a supply ...
A novel resolver converter based on a modified tracking method
(
IEEE
, 2013 , Conference Paper)
Resolvers are robust and reliable transducers, working as rotary transformers, and are used for mechanical angle measurement. In the present work, the two stator windings of the resolver are excited with sine and cosine ...