117 results about "Telecommunication application" patented technology

A high-speed, low-complexity Reed-Solomon (RS) decoder architecture using a novel pipelined recursive Modified Euclidean (PrME) algorithm block for very high-speed optical communications is provided. The RS decoder features a low-complexity Key Equation Solver using a PrME algorithm block. The recursive structure enables the low-complexity PrME algorithm block to be implemented. Pipelining and parallelizing allow the inputs to be received at very high fiber optic rates, and outputs to be delivered at correspondingly high rates with minimum delay. An 80-Gb / s RS decoder architecture using 0.13-μm CMOS technology in a supply voltage of 1.2 V is disclosed that features a core gate count of 393 K and operates at a clock rate of 625 MHz. The RS decoder has a wide range of applications, including fiber optic telecommunication applications, hard drive or disk controller applications, computational storage system applications, CD or DVD controller applications, fiber optic systems, router systems, wireless communication systems, cellular telephone systems, microwave link systems, satellite communication systems, digital television systems, networking systems, high-speed modems and the like.

The invention pertains to wavelength-agile optical filters suitable for wavelength-division-multiplexed (WDM) optical communications networks. More particularly, the invention pertains to optical filters with a wavelength reference that can be remotely switched to arbitrarily selectable channels on a standard grid, and to re-configurable optical communications networks employing same. The present invention provides a communication apparatus with a tunable filter which may be used in a wide range of applications including tuning an external cavity laser (ECL), selecting a wavelength for an add / drop multiplexer and providing channel selection and feedback for a wavelength locker. The filter may be utilized as a discrete component or in combination with circulators, wavelength lockers and gain medium. The filter may be implemented in whole or in part as part of a gain medium. The tunable filter exhibits a compact form factor and precise tuning to any selected wavelength of a predetermined set of wavelengths comprising a wavelength grid. The tunable filter may thus be utilized in telecom applications to generate the center wavelengths for any channel on the ITU or other optical grid.

A microstructured fiber having a cladding comprising a number of elongated features that are arranged to provide concentric circular or polygonial regions surrounding the fiber core. The cladding comprises a plurality of concentric cladding regions, at least some of which comprising cladding features. Cladding regions comprising cladding features of a relatively low index type are arranged alternatingly with cladding regions of a relatively high index type. The cladding features are arranged in a non-periodic manner when viewed in a cross section of the fiber. The cladding enables waveguidance by photonic bandgap effects in the fiber core. An optical fiber of this type may be used for light guidance in hollow core fibers for high power transmission. The special cladding structure may also provide strong positive or negative dispersion of light guided through the fiber-making the fiber useful for telecommunication applications.

A method for assuring a blazed condition in a DMD device used in telecommunications applications. By meeting certain conditions in the fabrication and operation of the DMD, the device can achieve a blazed condition and be very effective in switching near monochromatic spatially coherent light, thereby opening up a whole new application field for such devices. This method determines the optimal pixel pitch and mirror tilt angle for a given incident angle and wavelength of near monochromatic spatially coherent light to assure blazed operating conditions. The Fraunhofer envelope is determined by convolving the Fourier transforms of the mirror aperture and the delta function at the center of each mirror and then aligning the center of this envelope with a diffraction order to provide a blazed condition. The method of the present invention presents a formula for precisely determining the mirror pitch and tilt angle to assure that a blazed condition exists for a given incident angle and wavelength of near monochromatic spatially coherent light. Considerations for the special case, know as Littrow conditions, where the incident and the reflected light transverse the same path, are also given. This case is particularly attractive for fiber optic / telecommunication applications since the same optics can be used for incoming and outgoing (reflected) light.

Methods and apparatus for generating a frequency comb and for its use in analyzing materials and in telecommunications. The frequency comb is generated by passing pulsed light from a laser through an optical fiber having a constriction. The frequency comb comprises a plurality of monochromatic components separated in frequency by a substantially constant frequency increment. The monochromatic components are used to probe materials for analysis. In preferred embodiments, the materials are DNA, RNA, PNA and other biologically important molecules and polymers. Optical responses are observed and used to analyze or identify samples. In telecommunication applications, the individual monochromatic components serve as carriers for individual communication channels that can carry information of any of a variety of types, such as voice, data and images.

A large-scale radio frequency signal information processing and analysis system that provides advanced signal analysis for telecommunication applications, including band capacity and geographical density determinations and detection, classification, identification, and geolocation of signals across a wide range of frequencies and across broad geographical areas. The system may utilize a range of novel algorithms for bin-wise processing, Rayleigh distribution analysis, telecommunication signal classification, receiver anomaly detection, transmitter density estimation, transmitter detection and location, geolocation analysis, telecommunication activity estimation, telecommunication utilization estimation, frequency utilization estimation, and data interpolation.

A method of forming a highly doped layer of AlGaN, is practiced by first removing contaminants from a MBE machine. Wafers are then outgassed in the machine at very low pressures. A nitride is then formed on the wafer and an AlN layer is grown. The highly doped GaAlN layer is then formed having electron densities beyond 1×1020 cm−3 at Al mole fractions up to 65% are obtained. These levels of doping application of n-type bulk, and n / p tunnel injection to short wavelength UV emitters. Some applications include light emitting diodes having wavelengths between approximately 254 and 290 nm for use in fluorescent light bulbs, hazardous materials detection, water purification and other decontamination environments. Lasers formed using the highly doped layers are useful in high-density storage applications or telecommunications applications. In yet a further embodiment, a transistor is formed utilizing the highly doped layer as a channel.

A telecommunication application software framework for developing NGN service is arranged between an application server and a telecommunication service logic layer, with the function of further expanding a plurality of utility functions relevant to the telecommunication service for providing the simple and powerful service development and parameters configuration approach of XML script, and the rich and easy resource of the telecommunication service, which is based on the common application server, to simplify and quicken the service development. The framework comprises four software modules as follows: an , a route module for invoking a service loading module and completing service loading process; the service loading module for invoking a service component module and an agreement-related module to perform the instantiation and assembly of the service logic in the service loading process; the service component module and the agreement-related module. The framework is especially applicable in simplifying and quickening plurality of value-added services development for NGN with a practical promising prospect.

Remote enclosure systems have now been designed and are described herein that meet the following goals: a) consolidate electrical terminations in one system; b) pre-terminate AC and DC equipment loads before site installation; c) provide multiple access points for facilitating equipment repair and installation; d) are easily configurable and expanded through the use of a modular frame design that accommodates a variety of customized side panels or the attachment of a variety of expansion cabinets; e) are aesthetically functional given the cable entry and routing structure; f) provide exceptional thermal management and g) reduce problems inherent in conventional electronic setups. Remote enclosure systems contemplated generally include: a) a frame system further comprising at least two side panels; b) at least one door coupled to the frame system; c) a cable management top assembly coupled to the frame system; d) at least one removable radio frequency (RF) management system, such as at least one RF port plate, at least one RF port, at least one RF cable or any other suitable system for managing RF signals and a combination thereof, coupled to at least one of the side panels, coupled to and / or located within the cable management top assembly and / or coupled to and / or located within the frame system or a combination thereof and e) a bottom panel coupled to the frame system. The remote enclosure system may also comprise any number of components suitable for electronics, wireless and cable-based data and telecommunications applications, including air conditioner exhaust member, an air conditioner unit, a battery pack, a meter base, a power receptacle box, an alarm system or alarm device, an expansion cabinet, a coupling device or system, a pre-wiring system and / or a demarcation component.

Apparatus and accompanying methods for use therein for implementing a method and system for emulating a supporting mobile for testing a packet-data communication device. Thus, the present invention is directed to, in a general aspect, a system, and accompanying methods for use therein, for packet data communications. In a preferred embodiment the invention relates to testing of packet data applications including wireless communications such as push to talk over cellular (PoC) wireless telecommunications applications. The test system of the present invention comprises an emulated communication device for transmitting and receiving packet data and a controller for controlling the emulated communications device. The controller operatively connected to the emulated communication device and the controller enables the emulated communications device to emulate the communications device by performing functions that the communication device performs.

Methods and apparatus that provide TO-can optoelectronic packages suitable for optical telecommunications applications involving data speed rates of up to 10 Gbps and beyond. A TO-can optoelectronic package may comprise a TO-can cap and a TO-can header defining an interior region of the package. An optoelectronic component such as a laser or photodetector can be mounted within the interior region of the TO-can. An electrical connection may be selected for coupling the optoelectronic component to a selected post of the TO-can package. The electrical connection may include a transmission line formed from a conductive element other than a bond wire having a predefined length that can assist in reducing parasitic effects within the TO-can optoelectronic package to accommodate high-speed data rates. The transmission line itself is connected to the optoelectronic component and the selected post with a plurality of bond wires.

Techniques for using a proxy model to encapsulate one or more telecommunications (telecom) functionalities are provided. The techniques include generating a proxy model, wherein the proxy model comprises at least one of a representation module, an implementation module, a metadata module, one or more utility snippet modules, one or more unit test code modules and a module linking to one or more blogs, and using the proxy model to encapsulate one or more telecom functionalities. Techniques are also provided for creating a telecom service using the proxy model.

The invention discloses a telecom smart card and a telecom smart card-based non-contact application management method. The telecom smart card comprises a contact communication module, a telecom application module and a non-contact application module, wherein the contact communication module is used for receiving a non-contact application management instruction, and transmitting the non-contact application management instruction to the telecom application module; the telecom application module is used for resolving the non-contact application management instruction to obtain a non-contact application identifier and an operating instruction, and transmitting the non-contact application identifier and the operating instruction to the non-contact application module; and the non-contact application module is used for determining non-contact application corresponding to the non-contact application identifier according to the non-contact application identifier, and performing an operation corresponding to the operating instruction on the non-contact application corresponding to the non-contact application identifier according to the operating instruction. By the telecom smart card-based non-contact application management method and the telecom smart card provided by the embodiment of the invention, the unified management of many kinds of non-contact application in the smart card can be realized.

A voice based multimodal speaker authentication method and telecommunications application thereof employing a speaker adaptive method for training phenome specific Gaussian mixture models. Applied to telecommunications services, the method may advantageously be implemented in contemporary wireless terminals.

The present invention provides optical filters that can be used in a range of telecommunications applications including optical multiplexers / demultiplexers, optical routers, and optical gain scalers. The optical filter is modular, using two or more couplers with a pair of delay paths between each pair of couplers in a sequence to generate a range of optical filter functions. The desired filter profile / function is obtained by proper selection of the coupling ratio for each coupler and by the length of each pair of delay paths. The couplers may be implemented as polarization or intensity beam splitters positioned along the optical path. Each coupler couples in controllable amounts, one or two inputs with the corresponding pair of delay paths. Where a coupler is implemented as a polarization beam splitter, the coupling is accomplished by input to the coupler of polarized light and by the subsequent separation of orthogonal "P" and "S" components of that light onto corresponding ones of the pair of delay paths. Where coupling is implemented with an intensity beam splitter, the coupling is accomplished by input of light with the percentage of reflection and transmission of the light determining the coupling ratio or percentage of the light input onto corresponding ones of the pair of delay paths. The pair of delay paths includes in an embodiment of the invention, passive thermal stabilization. The passive thermal stabilization of the filter(s) is accomplished by a plurality of optical elements positioned in and defining the optical path length of each member of the pair of paths. These optical elements are designed so that the optical path length difference between the pair of delay paths remains substantially invariant across a range of temperatures.

An optical tunable filter that includes a thin-film filter for band-passing at least two bands of wavelengths. The tunable filter further includes a tunable band-passing device tunable over the at least two bands for tuning to a tunable pass-band spectrally overlapped with one of the at least two bands. The tunable band-passing device further includes an Acousto-optical cell tunable with acoustic wave signals. The thin-film filter cooperating with the tunable band-pass device for generating a tunable output waveform that has substantially a square waveform spectrally corresponding to the at least two bands. The thin-film filter further cooperates with the tunable band-pass device for generating a tunable output waveform having substantially a square waveform over a spectral range of a C-band, an L-band and an S-band. The tunable band-pass device band-passes a tunable substantially Sinc-function-like waveform and the thin film filter band-passing a substantially square waveform with a center attenuated dip for compensating the tunable substantially Sinc-function waveform.

Remote enclosure systems have now been designed and are described herein that meet the following goals: a) consolidate electrical terminations in one system; b) pre-terminate AC and DC equipment loads before site installation; c) provide multiple access points for facilitating equipment repair and installation; d) are easily configurable and expanded through the use of a modular frame design that accommodates a variety of customized side panels or the attachment of a variety of expansion cabinets; e) are aesthetically functional given the cable entry and routing structure; f) provide exceptional thermal management and g) reduce problems inherent in conventional electronic setups. Remote enclosure systems contemplated generally include: a) a frame system further comprising at least two side panels; b) at least one door coupled to the frame system; c) a cable management top assembly coupled to the frame system; d) at least one removable radiofrequency (RF) management system, such as at least one RF port plate, at least one RF port, at least one RF cable or any other suitable system for managing RF signals and a combination thereof, coupled to at least one of the side panels, coupled to and / or located within the cable management top assembly and / or coupled to and / or located within the frame system or a combination thereof and e) a bottom panel coupled to the frame system. The remote enclosure system may also comprise any number of components suitable for electronics, wireless and cable-based data and telecommunications applications, including air conditioner exhaust member, an air conditioner unit, a battery pack, a meter base, a power receptacle box, an alarm system or alarm device, an expansion cabinet, a coupling device or system, a pre-wiring system and / or a demarcation component.

The present invention provides optical filters that can be used in a range of telecommunications applications including optical multiplexers / demultiplexers, optical routers, and optical gain scalers. The optical filter is modular, using two or more couplers with a pair of delay paths between each pair of couplers in a sequence to generate a range of optical filter functions. The desired filter profile / function is obtained by proper selection of the coupling ratio for each coupler and by the length of each pair of delay paths. The couplers may be implemented as polarization or intensity beam splitters positioned along the optical path. Each coupler couples in controllable amounts, one or two inputs with the corresponding pair of delay paths. Where a coupler is implemented as a polarization beam splitter, the coupling is accomplished by input to the coupler of polarized light and by the subsequent separation of orthogonal "P" and "S" components of that light onto corresponding ones of the pair of delay paths. Where coupling is implemented with an intensity beam splitter, the coupling is accomplished by input of light with the percentage of reflection and transmission of the light determining the coupling ratio or percentage of the light input onto corresponding ones of the pair of delay paths. The pair of delay paths includes in an embodiment of the invention, passive thermal stabilization. The passive thermal stabilization of the filter(s) is accomplished by a plurality of optical elements positioned in and defining the optical path length of each member of the pair of paths. These optical elements are designed so that the optical path length difference between the pair of delay paths remains substantially invariant across a range of temperatures.

Improved over-voltage protection apparatus and associated methods useful in e.g., telecommunications applications. In one embodiment, the over voltage protection apparatus comprises a gas discharge tube, common mode inductor, coupled inductor, secondary over-voltage protection device, filter circuitry, coupled inductor and common mode inductor. In one embodiment the over voltage protection apparatus comprises a gas discharge tube, common mode inductor, coupled inductor, secondary over-voltage protection device and filter circuitry. The arrangement of said inductive components being optimally connected in such a manner as to provide a high impedance circuit for all surge events to the gas discharge tube, so as to protect the filtering circuitry. Methods for the manufacture of the filter protection apparatus so as to be maximally independent of component tolerances are also disclosed.

Intrinsic material and optical properties of liquid crystal units, such as variable response to wavelength and temperature variations, are accommodated in accordance with the invention by introducing at least a pair of wave plates of different thicknesses which, together with the retardation introduced by the liquid crystal, serve to broaden the wavelength of response in fashion which also athermalizes the response. Specific retardations and angles of inclination relative to the input polarization are employed for overcoming these nonlinearlities.

An optical interleaver for use in a range of telecommunications applications including optical multiplexers / demultiplexers and optical routers. The optical device includes an optical processing loop which allows multi-stage performance characteristics to be achieved with a single physical filtration stage. Optical processing on the first leg and second legs of the loop is asymmetrical thereby improving the integrity of the optical signals by effecting complementary chromatic dispersion on the first and second legs. A fundamental filter cell within the interleaver filters optical signals propagating on each of the two legs of the optical loop which intersects the fundamental filter cell.

A voice based multimodal speaker authentication method and telecommunications application thereof employing a speaker adaptive method for training phenome specific Gaussian mixture models. Applied to telecommunications services, the method may advantageously be implemented in contemporary wireless terminals.

The invention provides a smart card and a method for integrating multiple telecom applications on the same. The method comprises the following steps: when receiving application protocol data unit (APDU) instructions, judging whether the APDU instructions are the instructions special for telecom applications; if so, classifying the instructions special for telecom applications; if not, executing the instructions; and analyzing the current events in the instructions and triggering and executing various types of telecom applications corresponding to the current events according to an event registry. By adopting the smart card and the method, the advantages of both the Native card and the Java card can be considered, thus ensuring the executing speed of the smart card and simultaneously realizing addition and deletion of applications.

A telecommunication network comprises one or more servers. The one or more servers are configured to connect to a first client device associated with a first user. The first client device executes a web browser application to enable the first user to access telecommunication services using a real-time communication protocol. The web browser application comprises a telecommunication application that uses Hypertext Transfer Protocol (HTTP) to transmit and receive the first user's authentication information. The one or more servers are further configured to connect a second client device associated with a second user. The second client device executes a non-browser application to enable the second user to access the telecommunication resources using an Internet telephony protocol. A web browser application is a telecommunication application that uses HTTP protocol for initiating a session and a non-browser application is a telecommunication application that uses Session Initiation Protocol (SIP) protocol for initiating a session. The non-browser application uses the SIP to forward and receive the second user's authentication information. The one or more servers are configured to authorize the web browser application to access the telecommunication services using HTTP and authorize the non-browser application to access the telecommunication services using SIP. The one or more servers are configured to transport media to the first client device after authorizing access the telecommunication services using HTTP and transport media to the second client device after authorizing access the telecommunication services using SIP.

An optical device that can be used in a range of telecommunications applications including optical multiplexers / demultiplexers and optical routers. The optical device includes an optical processing loop which allows multi-stage performance characteristics to be achieved with a single physical filtration stage. Optical processing on the first leg and second legs of the loop is asymmetrical thereby improving the integrity of the optical signals by effecting complementary chromatic dispersion on the first and second legs. In an embodiment of the invention the optical device includes a fundamental filter cell, a retro reflector and a splitter / combiner. The fundamental filter cell filters optical signals propagating on each of two legs of an optical loop which intersects the fundamental filter cell. The fundamental filter cell operates as a full waveplate to the odd set of channels and a half waveplate to the even set of channels on a selected one of the two legs and as a half waveplate to the odd set of channels and a full waveplate to the even set of channels on a remaining one of the two legs. The retro reflector optically couples with the fundamental filter cell to reflect the optical signals from one of the two legs to an other of the two legs to form the optical loop. The splitter / combiner optically couples between the fundamental filter cell and the retro reflector to split or combine the odd set of channels and the even set of channels depending on the propagation direction of the optical signals along the optical loop.

An arrangement for generating addresses for interleaving / de-interleaving sequences (X1, X2, X3, . . . , XK) including a given number (K) of items, wherein each value for said given number (K) identifies a corresponding set of interleaving parameters (R, C, p, v). The arrangement has at least one memory unit wherein a plurality of records are stored, each record being indicative of a respective set of parameters (R, C, p, v) corresponding to at least one value for said given number (K). Sets of interleaving parameters (R, C, p, v) are thus available in the memory unit to be promptly and directly retrieved for all possible values of said given number of items (K). A preferred use is in turbo encoders / decoders for advanced telecommunications applications such as UMTS.