LOW-LOSS SPLICES FOR SINGLE-MODE FIBERS.
- Derosier R.
- Tynes A.
A technique for producing low-loss splices in single-mode fibres has been developed and evaluated. The splices are made by sandwiching the fibre butt-joint ends between a glass V-groove block and a flat glass plate, both of which are made by fibre-drawing techniques. A new splice-loss measuring technique is described. The ...
PARTIAL DETECTION AND CORRECTION OF TRANSMISSION ERRORS FROM THE RECEIVED DATA IN LINEAR PCM.
- Esdale D.
- Goodman D.
- Steele R.
A method for partially correcting transmission errors in a 1st-order d.p.c.m. system, without recourse to channel coding, is described. A simple detection algorithm based on the statistical properties of a sequence of differences between adjacent samples of a modified decoded sequence is used to identify the erroneous samples. Three different ...
AN ACOUSTIC SURFACE WAVE ANALOG TO DIGITAL CONVERTER.
- Baldwin G.
- Coldren L.
An analogue-digital convertor that employs an acoustic-surface-wave transducer code plate is described. An experimental a.d. encoder with 4 bits of resolution and a 3 MHz sampling rate has been implemented with an LiNbO3 surface-wave structure.
A NONPARAMETRIC VALLEY-SEEKING TECHNIQUE FOR CLUSTER ANALYSIS.
- Fukunaga K.
- Koontz W.
The problem of clustering multivariate observations is viewed as the replacement of a set of vectors with a set of labels and representative vectors. A general criterion for clustering is derived as a measure of representation error. Some special cases are derived by simplifying the general criterion. A general algorithm ...
NOISE FROM NEUTRON INDUCED DEFECTS IN JUNCTION FIELD EFFECT TRANSISTORS.
- Kern H.
- Mc Kenzie J.
Neutron damage centers in the depletion region between the gates and channel of a JFET fluctuate in charge and modulate the drain current. Thus, they create noise. The noise from 1012 14.8 MeV neutrons/cm2 is easily measured. Temperature dependence of leakage current indicates a neutron damage generation-recombination level effective at ...
EMITTER SOFTENING IN DIFFUSED SILICON TRANSISTORS.
- Henning S.
- Miller L.
IN SILICON, n-p-n, double-diffused mesa transistors, emitter softening is a term which has been coined to describe a unique form of device life failure. It is characterized by an increase in the emitter leakage current which occurs during power aging. This specific type of failure does not usually occur during ...
6000 Megacycle/Sec Radio Relay System for Broad-band, long Haul Service in the Bell System.
- Mcdavitt M.
DEVELOPMENT of microwave communication facilities for Bell System use was undertaken in 1945, taking advantage of prewar research at Bell Telephone Laboratories and of the impetus in technology achieved during the war years. In 1947, an experimental 4,000-mc/sec (megacycle per second) system of moderate bandwidth (TD-X)1 was established between New ...
Domain formation and domain wall motions in ferroelectric BaTiO sub 3 Single Crystals.
- Merz W.
Using very good BaTiO3 single crystals, we have investigated the arrangements and movements of the domains. Besides the well known 90Â° walls we have observed 180Â° walls very clearly. A 180Â° wall forms the boundary between two domains polarized at 180Â° to each other (antiparallel). It turns out, that every ...
Surface Conduction Channels in Germanium - An Interim Report.
- Christensen H.
Surface conduction channels on both the n-type and the p-type region of a p-n junction of germanium have been produced and investigated. Channels on the n-type region were produced by an oxygen rich surface environment and those on the p-side were produced by high humidity. At an intermediate, 75 per ...
Ferrite core varindors.
- Duncan R.
- Stone H.
Within the last ten years, due to the advent of ferrites important new possibilities in inductor design have materialized. Higher Q's, smaller sizes, and lower costs are among the advantages these new magnetic materials offer. This paper discusses the properties of ferrites and reviews the progress that has been made ...
Attenuator Materials, Attenuators and Dimensions for Microwaves- (I).
- Frosch C.
- Rigterink M.
- Teal G.
Microwave development has brought with it many related devices, one class of which is circuit elements having the property of attenuating or absorbing microwaves. Investigation of the microwave properties of a variety of solids led to the application of electrically in-homogeneous ceramic and plastic materials such as silicon carbide dispersed ...
Optimal Configuration of Services in Network Function Virtualization
- Abhinanadan Sridhara Rao Prasad
- Arjona Aroca J.
- David Koll
- Hilt V.
- Omana Iglesias J.
- Xiaoming Fu
Network Function Virtualization (NFV) helps to deploy the functionality of expensive and unflexible hardware appliances as scalable resources on commodity servers. However, optimal resource provisioning for non-trivial NFV services is still an open problem. While there have been efforts to answer the questions of when to provision additional resources in ...
Networking Things - Securing the IoT through SDN and virtualization
- Boussard M.
The talk will present results from an internal Bell Labs project that aims at giving back to users control over their connected lives. By using virtualization and software-defined networking we scout the future of connected environments, in which dedicated, isolated network overlays, within and across administrative domains, are automatically set ...
Sieve: Towards Actionable Insights from Monitored Metrics in Microservices
- Akkus I.
- Bhatotia P.
- Chen R.
- Fetzer C.
- Jiao L.
- Rodrigues A.
- Thalheim J.
- Viswanath B.
Most distributed systems are constantly monitored to understand their current and prior state, and this monitoring is a crucial part of any system deployment. In this respect, many distributed systems applications are designed following the microservices architecture. These applications are split up into smaller services that can be deployed individually, ...
Autoscaling Orchestration for Container-based Telecom Microservices
- Ghami-Doudane Yacine
- Luong D.
- Outtagarts A.
Future mobile network would be much more flexible, dynamic and faster adaptable to match the evolve demand. Network Function Virtualization (NFV) is investigated to take the advantage of IT virtualization on telecom by separating virtualization function from underlying dedicated hardware. Container-based micro-service approach is currently discussed as the lightweight virtualization ...
Improving Seamless VNF State Migration
- Hilt V.
- Nobach L.
- Rimac I.
The shift to virtualized network functions allows for new opportunities in elastic and dynamic traffic management. However, the (partial) migration of VNF instances and their state (including split and merge) bears the risk of jitter and packet loss during the migration process. Previous work has been trying to mitigate these ...
5G ADVANCED RECEIVER
- Harman D.
- Otterbach J.
- Tavares M.
- Zivkovic M.
5G ADVANCED RECEIVER; TURBO-SIC FOR UPLINK BOOSTING Today's 4G deployments suffer from overloaded uplink channels in MegaCity applications. By assigning the same time-frequency resources to several users simultaneously higher uplink capacity can be provided for wireless networks. To decode this superposed signal of each user, advanced signal processing at the ...
Commuter-Adjusted Services Cloud
- Brown J.
- Gardell P.
- Wilkin G.
What is a Commuter-Adjusted population? For the purposes of this description we will describe it as Large amounts of people and things moving in a regular pattern, usually linked to work activities1. This Commuter-Adjusted population, shifts by as much as 78% in large metropolitan areas including New York City, District ...
Predictive and Dynamically Adaptive Solution for Cost Effective IoT Connectivity
- Laha S.
- Sudarsan P.
We are planning to attend the following IoT conference in Chicago http://www.remotemagazine.com/internetofthings/ on March 29 and 30, 2017. The abstract which is due on Oct 25th is attached.
Enhancing Coexistence in the Unlicensed Band with Massive MIMO
- Bonfante A.
- Claussen H.
- Galati Giordano L.
- Garcia Rodriguez A.
- Geraci G.
- Lopez-Perez D.
We consider cellular base stations (BSs) equipped with a large number of antennas and operating in the unlicensed band. We denote such system as massive MIMO unlicensed (mMIMO-U). We design the key procedures required to guarantee coexistence between a cellular BS and the nearby Wi-Fi devices. These include: neighboring Wi-Fi ...