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The minimum mean square error (MMSE) multiple antenna transmission scheme for a code division multiple access (CDMA) system was recently developed by Choi and Perreau [1]. In this paper, we first show that the zero-forcing (ZF) tr...
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The minimum mean square error (MMSE) multiple antenna transmission scheme for a code division multiple access (CDMA) system was recently developed by Choi and Perreau [1]. In this paper, we first show that the zero-forcing (ZF) transmit beamformer for multiple antenna CDMA system has the same form as the MMSE beamformer given by Choi and Perreau. We then develop an analytical method to obtain a closed-form expression of the bit error rate (BER) of the ZF transmit beamformer when there are channel estimation errors. The analytical and simulation results show good agreement, and confirm the importance of accurate channel state information (CSI) at the transmitter when using the ZF transmit beamformer.
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With the rapid development of cloud computing technology, the need of big data and virtualization also grows year by year. How to build an IaaS, Infrastructure as a Service become more and more important for a company IT. Traditio...
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With the rapid development of cloud computing technology, the need of big data and virtualization also grows year by year. How to build an IaaS, Infrastructure as a Service become more and more important for a company IT. Traditional storage solution cannot longer fulfill the fast growing needs of storage. A far more advanced storage solution is needed. A Software Defined Storage (SDS) is more flexible than traditional storage, administrators can easily adjust the current storage resource based on current requirements and dispatch these resource rapidly. Nowadays, a SDS can utilize old storage hardware which can reduce the cost of purchasing new storage hardware. In addition, a SDS usually can provide features such as high-availability, remote-backup, snapshot, clone, compression, deduplication and RAID. As the result, we propose a method to build a SDS based on Illumos ZFS. The features such as snapshot, clone, compression, deduplication and RAID are already built in ZFS which can easily raise storage space utilization and data availability. Besides, we use ZFS built-in command to develop the remote-backup feature which allows the data can be periodically and automatically copied from local to remote. The high-availability feature is developed based on Pacemaker, an open source high-availability resource manager suitable for both small and large clusters. This SDS supports NFS/iSCSI/SAMBA protocols and built-in software RAID function make it become the storage repository of the hypervisor such as XenServer, VMware, Hyper-V in a virtualization environment to store virtual machine images. We also perform an experiment to compare the performance of the SDS contain SSDs as write and read cache with the SDS without write and read cache.
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2013 MAR 27 (VerticalNews) -- By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Gumpoltsbe...
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2013 MAR 27 (VerticalNews) -- By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Gumpoltsberger, Gerhard (Friedrichshafen, DE); Wafzig, Juergen (Eriskirch, DE); Reisch, Matthias (Ravensburg, DE); Rieger, Wolfgang (Friedrichshafen, DE); Dreibholz, Ralf (Meckenbeuren, DE); Maier, Markus (Friedrichshafen, DE), filed on October 8, 2008, was cleared and issued on March 12, 2013.
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2013 MAR 20 (VerticalNews) -- By a News Reporter-Staff News Editor at Journal of Engineering --
According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by
the inventors Mair, Ulrich...
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2013 MAR 20 (VerticalNews) -- By a News Reporter-Staff News Editor at Journal of Engineering --
According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by
the inventors Mair, Ulrich (Friedrichshafen, DE); Rosemeier, Thomas (Meckenbeuren, DE); Gehring,
Dietmar (Aichstetten, DE); Baasch, Detlef (Friedrichshafen, DE); Beigang, Lothar (Kressbronn, DE);
Geier, Manfred (Ruderting, DE), filed on August 26, 2009, was cleared and issued on March 5, 2013.
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2013 MAR 27 (VerticalNews) -- By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Breun, Wol...
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2013 MAR 27 (VerticalNews) -- By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Breun, Wolfgang (Niederwerrn, DE); Kirchner, Marcus (Wurzburg, DE); Gonschorrek, Hans (Bergrheinfeld, DE); Harwardt, Valentin (Sennfeld, DE), filed on March 19, 2008, was cleared and issued on March 12, 2013.
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This paper discusses massive multiple-input multiple-output (MIMO) systems. Its influence on achieving higher data throughput, flexibility, and reliability for the fifth-generation (5G) deployment is studied. This is an emerging t...
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This paper discusses massive multiple-input multiple-output (MIMO) systems. Its influence on achieving higher data throughput, flexibility, and reliability for the fifth-generation (5G) deployment is studied. This is an emerging technology in wireless communication that increases spectral efficiency in comparison with MIMO systems. However, one of the challenges is to achieve efficient algorithms with low complexity and enable their actual implementation. The study addresses the behavior and performance of Zero Forced Zero (ZF) and Minimum Mean Squared Error (MMSE) detectors in different noise and estimation error scenarios. This is done to reduce user interference in a coordinated multi-user cellular system where multiple antennas are employed.
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2013 MAR 20 (VerticalNews) -- By a News Reporter-Staff News Editor at Journal of Engineering -- ZF
Friedrichshafen, AG (Friedrichshafen, DE) has been issued patent number 8388493, according to news
reporting originating out of Ale...
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2013 MAR 20 (VerticalNews) -- By a News Reporter-Staff News Editor at Journal of Engineering -- ZF
Friedrichshafen, AG (Friedrichshafen, DE) has been issued patent number 8388493, according to news
reporting originating out of Alexandria, Virginia, by VerticalNews editors.
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By a News Reporter-Staff News Editor at Electronics Newsweekly – A new
study on electronics packaging is now available. According to news reporting out of the ZF Friedrichshafen
AG by VerticalNews editors, research stated, “In...
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By a News Reporter-Staff News Editor at Electronics Newsweekly – A new
study on electronics packaging is now available. According to news reporting out of the ZF Friedrichshafen
AG by VerticalNews editors, research stated, “In the past years the Finite Element Analysis has proven to
be a suitable way for fatigue prediction of electronic equipment based on the Physics-of-Failure-approach.”
The news editors obtained a quote from the research from ZF Friedrichshafen AG: “For this, inelastic
strain parameters like creep strain or creep energy density are evaluated in crack susceptible regions of
solder joints. Due to the non-linearity of the plastic behavior, which is the basis for these simulations,
the computational effort can be significant. This mostly leads to a component focused approach. Global
influences on components like local stiffness variations due to adjacent components, copper traces or
fixations of the Printed Circuit Board are often ignored. To make creep based fatigue predictions suitable
for complex Printed Circuit Board Assemblies, a method for reducing computational effort needs to be
established. For this matter, a machine learning based approach for solder joints has been developed.”
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В статье рассматриваются вопросы эффективной организации вычислительных ресурсов в центре обработки научных данных с приме...
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В статье рассматриваются вопросы эффективной организации вычислительных ресурсов в центре обработки научных данных с применением технологий облачных вычислений, в частности, парадигмы «инфраструктура как сервис». Обсуждаются технологические подходы, которые при ограниченном бюджете позволяют строить решения, обладающие характеристиками систем корпоративного уровня.
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Reporters obtained the following quote from the background information supplied by the inventors:
“According to known concepts, stator coils or stator windings of an electric machine can be contacted by
external connection poin...
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Reporters obtained the following quote from the background information supplied by the inventors:
“According to known concepts, stator coils or stator windings of an electric machine can be contacted by
external connection points or power connections via an interconnection arrangement in order to apply a
respective voltage to the individual phases of the winding via an electric circuit or power electronics.
“Known interconnection arrangements have, for example, three connector rings, which are received
inside a carrier. At the same time, the carrier can ensure the positioning of the rings and electrical
insulation of the connector rings from one another. The connector rings are securely fixed in the carrier.
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