Abstract: A method for protecting data contained in a security module of a telecommunication device equipped with a near-field communication router and with a microcontroller, wherein data relative to the routing between the security module and gates of the router assigned to near-field communications are transmitted over a channel accessible by the router only, or by a control signal which is not generated by the microcontroller for the router.

Abstract: Laser emission device with integrated light modulator comprising: a multilayer waveguide comprising, on a support layer, a first guiding layer, a first doped layer, a second guiding layer of light amplifying material, and a biasing second doped layer opposite the first doped layer, the waveguide comprising a laser amplification section (50), a light modulation section (52) comprising an extraction zone for radiating the light, a transition section (51) inserted between the laser amplification section and the light modulation section, a positive first electrode for injecting a pumping current into the laser amplification section, a positive second electrode for injecting a modulation signal into the modulation section, a negative third electrode, and a reference fourth electrode, the second doped layer comprising an electrical insulation situated in the transition section to form a resistive channel.

Abstract: Techniques for optimizing data transmission efficiency and accuracy in cellular network environments using remote radio headers are presented. In an aspect, a mobile device includes a collection component configured to collect fiber loss data from a plurality of remote radio devices in a cellular network. The fiber loss data can include data representative of data transmission loss over fibers respectively connecting the plurality of remote radio devices to a base station device. The mobile device further includes a selection component configured to select a remote radio device from the plurality of remote radio devices with which to access based in part on the fiber loss data.

Abstract: Methods and apparatus for encoding and decoding data transmitted acoustically and/or optically to strong authentication tokens to generate dynamic security values are disclosed. The tokens may also include a selection mechanism to select either an acoustical or an optical input interface to receive data. A communication interface may be provided to communicate with a removable security device such as a smart card and the token may be adapted to generate dynamic security values in cooperation with the removable security device.

Abstract: An inline optoelectronic converter configured to convert electrical signals to optical signals and to convert optical signals to electrical signals. The converter is external to the avionic computer and connected to the avionic computer at a location spaced apart from the avionic computer. The converter is configured to be integrated into an existing wiring bundle of the avionic computer. Also disclosed is a method of retrofitting an avionic computer by connecting an optoelectronic converter to the computer. The method comprises connecting the converter to an existing wiring bundle of the avionic computer at a location spaced apart from the avionic computer.

Abstract: A method for transmitting baseband signals is disclosed. The method includes: when downlink traffic volume in an area among areas covered by multiple remote radio frequency units RRUs is lower than a preset threshold, generating or receiving a group of downlink baseband signals, where the group of downlink baseband signals corresponds to all RRUs in the area; and transmitting the group of downlink baseband signals to each RRU in the area, so that each RRU generates downlink radio frequency signals based on the downlink baseband signals and sends the downlink radio frequency signals. Accordingly, the embodiments of the present invention further disclose a method for transmitting baseband signals and a BBU. With the technical solutions, the bandwidth for transmitting baseband signals is greatly lowered, implementation is easy, and complexity of a system is reduced.

Abstract: There is disclosed an integrated base station (BS) communicatively combined with two or more simplified radio access points (APs). The integrated BS is configured to receive a signal from a backbone/backhaul network and transmits the received signal to the simplified radio APs, route a signal to at least one of the two or more simplified radio APs, and communicate with the two or more simplified radio APs through wireline communication.

Abstract: The present disclosure relates to a cell organization and method for controlling ultra-wideband (UWB) transmitting/receiving devices, the aim of which is to improve spatial occupancy (number of transmitters/receivers operating per unit area) and spectral efficiency (number of transmitters/receivers operating in a certain frequency range) in a predetermined area. The control method is based on configuring the optimum parameters—transmission power, bandwidth among others—for each UWB transmitter/receiver present in each cell. The configuration is calculated by monitoring the spectral parameters of the UWB transmitters/receivers operating in the area under control using a series of UWB sensors. In a preferred embodiment of the disclosure the sensors can be interconnected using photonic technology.

Abstract: A systems and methods for high data bit rate transmissions. In wireless or wired data transmissions. This method applied mostly to: cellular communication, optical communication and data transfer by cupper wires. This method applied as well to: satellite communication, Wi Fi, storage systems data transmission. The method is realized by software or hardware or combined.

Abstract: The present disclosure is directed to a transmitter arrangement 200; 400 and a method therein for transmitting a signal OB comprising a number of data streams D1, D2, D3, D4 and a number of sub-channels BP1, BP2, BP3, BP4; QP1, QP2; QA1 to a receiver 150 via a transmission link 140. The method comprises the actions of: obtaining link quality information indicative of the transmission conditions for the transmission link 140, and determining the number of sub-channels for the output signal based on obtained the transmission conditions such that the transmitted data throughput via the transmission link 140 remains the same and such that the transmitted data throughput is equally distributed between the determined number of sub-channels.

Abstract: An optical modulation apparatus for modulating an electromagnetic (e.g., radio frequency (RF)) signal onto an optical carrier signal may be arranged to feed back at least a portion of the optical carrier signal, while excluding first-order sidebands, which may help increase modulation efficiency and improve output power, while retaining high modulation bandwidth. Such arrangements may be implemented, for example, using a Fabry-Perot resonator or a ring resonator in combination with a Mach-Zehnder interferometer or a Michelson interferometer.

Abstract: A compact photonic radio frequency receiver system includes a laser source that is configured to generate laser light Radio frequency (RF) and local oscillator (LO) input ports may receive RF and LO signals, respectively. One or more miniature lithium niobate waveguide phase modulators may be coupled to the laser source to receive the RF and LO signals and to modulate the laser light with the RF and LO signals in a first and a second path, and to generate phase-modulated laser lights including an RF-modulated light signal and an LO-modulated light signal. A first and a second miniature filter may be coupled to the miniature lithium niobate waveguide to separate a desired spectral band in the phase-modulated laser light of the first path and to facilitate wavelength locking of the laser light of the second path.

Abstract: A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog amplifier and an electro-optical converter. The ground unit has ultrafast data converters and digital frequency translators, as well as signal linearizers, to compensate for nonlinear distortion in the amplifiers and optical links in both directions. In one embodiment of the invention, at least one of the digital data converters, frequency translators, and linearizers includes superconducting elements mounted on a cryocooler.

Abstract: A method implemented by a middlebox comprising registering a customer premises equipment (CPE) in the middlebox, wherein the CPE is coupled to the middlebox via an electrical line, and facilitating registration of the CPE in a central office (CO) equipment coupled to the middlebox.

Abstract: A system for routing signals in a Distributed Antenna System includes a plurality of local Digital Access Units (DAUs) located at a Local location. Each of the plurality of local DAUs is coupled to each other and operable to route signals between the plurality of local DAUs. Each of the plurality of local DAUs includes one or more Base Transceiver Station (BTS) RF connections. Each of the plurality of BTS RF connections is operable to be coupled to one of one or more sectors of a BTS. The system also includes a plurality of remote DAUs located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport signals between the plurality of remote DAUs.

Abstract: According to an embodiment, a circuit board includes a signal line including at least portion of a first conductive layer that has a first portion extending over a cavity in the circuit board from a first side of the cavity. The circuit board also includes a first plurality of conductive vias surrounding the cavity and the first plurality of vias include at least one blind via disposed adjacent to the first side of the cavity.

Abstract: System and methods for inferring network topology are described, including a method comprising determining a normalized transmit power of a first device, identifying a second device based upon a parameter of the second device and the normalized transmit power of the first device, and generating a topology including the first device and the second device based upon at least one of the normalized transmit power of the first device and the parameter of the second device.

Abstract: A method and apparatus includes an optical source for a single order single-sideband suppressed-carrier optical signal with a bandwidth that scales from over 1 gigaHertz to greater than 20 gigaHertz. In an example embodiment, an apparatus includes a stable laser source configured to output an optical carrier signal at a carrier frequency. The apparatus includes a radio frequency electrical source configured to output an electrical radio frequency signal with a radio frequency bandwidth less than one octave. The apparatus also includes an optical modulator configured to output an optical signal with the optical carrier signal modulated by the radio frequency signal in a plurality of orders of optical frequency sidebands. The apparatus further includes an optical filter configured to pass one single order optical frequency sideband of the optical signal.

Abstract: The present invention is directed to communication system and methods. More specifically, various embodiments of the present invention provide a communication interface that is configured to transfer data at high bandwidth using PAM format(s) over optical communication networks. In certain embodiments, the communication interface is used by various devices within a spine-leaf network architecture, which allows large amount of data to be shared among servers.

Abstract: Disclosed are an apparatus and method configured to process video data signals operating on a passive optical network (PON). One example method of operation may include receiving a data signal at an optical distribution network node (ODN) and identifying signal interference in the data signal. The method may also include modifying a shape of the data signal in the electrical domain and transmitting the modified data signal to at least one optical termination unit (ONT).

Abstract: An RF signal generator has an optical part for outputting optical carrier signals separated in optical frequency, and a modulator arranged to modulate the optical carrier signals with an intermediate frequency to generate sidebands. A phase modulation is applied to one or more of the sidebands or the optical carriers, without applying the phase modulation to others of the signals, and the modulator has integrated optical paths for both the phase modulated signals and for the others of the signals. A detector part carries out heterodyne detection to combine the phase modulated and other signals to output an RF signal having the phase modulation. By having integrated optical paths, the relative phase of these optical paths can be more stable than using a fiber sagnac interferometer and optical isolator thus enabling use in advanced radio communications.

Abstract: A light array includes lights that transmit modulated light to indicate their unique light identifiers (IDs) and lights that transmit unmodulated light. A light receiver records images of the light array and recovers the light IDs from the modulated light. The light receiver uses the IDs to retrieve a light map representative of the light array. The receiver aligns the retrieved light map with the recorded images of the light array, and accesses real-world positions of all of the light in the light array, as deployed, based on the aligned light map. The light receiver determines a 3-dimensional position of the light receiver relative to the light array.

Abstract: A system and method including a transmitter including digital signal processor for providing a shaped data output in response to an input data stream. The shaped data output is coupled to a modulator that modulates an optical signal in response to the shaped data output to provide a non-rectangular shaped output having channel spacing greater than Nyquist channel spacing. Providing a shaped output consistent the present disclosure mitigates the effects of non-linear impairments in an optical transmission system.

Abstract: A transmission apparatus includes: an assigning unit that assigns an information signal to a subcarrier with a frequency different from a frequency of a received radio signal; a creating unit that creates a multi-carrier signal, in which information signals are multiplexed, each of the information signals being assigned to one subcarrier by the assigning unit; and a multiplexing unit that frequency-multiplexes the received radio signal to the multi-carrier signal created by the creating unit and outputs a resulting frequency-multiplexed signal.

Abstract: A stabilized ultra-high bandwidth capacity transceiver system that combines an E-band (71-76 GHz, 81-86 GHz) millimeter wave RF transceiver with an eye-safe adaptive optics Free Space Optical (FSO) transceiver as a combined apparatus for simultaneous point-to-point commercial communications. The apparatus has a high degree of assured carrier availability under stressing environmental conditions. The apparatus establishes and maintains pointing and stabilization of mmW RF and FSO optical beams between adjacent line of sight apparatuses. The apparatus can rapidly acquire and reacquire the FSO optical carrier link in the event the optical carrier link is impaired due to adverse weather.

Abstract: An out-of-band (OOB) mechanism is used to communicate a Bluetooth pairing code from a token to a mobile device. The token may include a light source and the mobile device may include a camera to communicate the Bluetooth pairing code using a light sequence. The token may include a speaker and the mobile device may include a microphone to communicate the Bluetooth pairing code.

Abstract: A method for data processing of an optical network element is provided, wherein a configuration information is received at the optical network element and a light signal is adjusted to a wavelength or wavelength range indicated by said configuration information; wherein an incoming optical signal is demodulated via the light signal and mixed as an electrical demodulated signal with a signal of an oscillator; wherein the signal of the oscillator is tuned to improve a reception of the incoming signal at the optical network element; and wherein the light signal is used for upstream modulation to provide a modulated optical upstream signal. Furthermore, an according device and a communication system are suggested including at least one such device.

Abstract: A compact photonic radio frequency front end receiver system including a laser chip source, radio frequency and LO inputs, an optical modulator chip coupled to the laser source and the radio frequency and LO inputs, a millimeter scale optical radio frequency multi-pole filter coupled to the optical modulator, an optical switch array chip coupled to the optical radio frequency multi-pole filter, and a detector chip coupled to the optical switch array, all with micro-optic coupling, heterodyne signal recovery, and wavelength locking.

Abstract: A tunable Radio Frequency (RF) filter device includes a tunable optical source configured to generate an optical carrier signal, and a modulator coupled to the tunable optical source and configured to modulate the optical carrier signal with an RF input signal. The tunable RF filter device may also include first and second optical waveguides coupled to the modulator and having first and second dispersion slopes of opposite sign, and an optical-to-electrical converter coupled to the first and second optical waveguides and configured to generate an RF output signal with a frequency notch therein based upon the tunable optical source.

Abstract: An optical system may have an optical transmitter including a digital signal processor to receive a signal channel, determine a digital signal associated with the signal channel based on information in a look-up table and based on a test tone, and output the digital signal. The optical system may further have a digital-to-analog converter to convert the digital signal to an analog signal, a laser to provide an optical signal, and a modulator to receive the optical signal and the analog signal, and modulate the optical signal based on the analog signal to form a modulated optical signal. The optical system may also have a photodiode to convert the modulated optical signal to a digital signal, a tone detector to detect the test tone based on the digital signal, and a controller to modify the information in the look-up table based on the test tone.

Abstract: Direct pin attachment is the most compact method to connect the OSA and the PCBA, due to better performance in general and allows maximum PCBA space for more functionality. However, direct pin attachment can result in concentrated stress in the OSA-PCBA joint area, which can affect the reliability and yield of the module. To overcome the problem, an integrated transceiver cage and housing is provided including a direct pin attachment with reinforcing tabs, which are fixed to the PCBA prior to the pins to transfer any stress between the OSA and PCBA, thereby reducing the amount of stress applied to the pins.

Abstract: An arrangement in a network (10), comprising: a site node (100) arranged to comprise a base station (120), the base station (120) being adapted for termination of wireless communication, and a central node (140) arranged to comprise a service unit (160), the service unit (160) being adapted for communication with the base station (120), wherein the central node (140) comprises a central switch unit (155), adapted for switching of data between the base station (120) and the service unit (160), wherein the base station (120) and the central switch unit (155) are optically connected, thus enabling that communication is carried by light.

Abstract: An RF/Optical shared aperture is capable of transmitting and receiving optical signals and RF signals simultaneously. This technology enables compact wide bandwidth communications systems with 100% availability in clear air turbulence, rain and fog. The functions of an optical telescope and an RF reflector antenna are combined into a single compact package by installing an RF feed at either of the focal points of a modified Gregorian telescope.

Abstract: The present invention is directed to data communication system and methods. More specifically, various embodiments of the present invention provide a communication interface that is configured to transfer data at high bandwidth using PAM format(s) over optical communication networks. In various embodiments, amplitude and phase of the optical wave are modulated. There are other embodiments as well.

Abstract: Optical fiber-based distributed communications components and systems, and related methods to provide localization services for client devices are disclosed. The localization services allow the providing and/or determination of the location of client devices in communication with a component or components of the optical fiber-based distributed communications system. The location of client devices can be provided and/or determined based on knowledge of the location of the component or components in the optical fiber-based distributed communications system in communication with the client device. This information can be used to determine or provide a more precise area of location or area of location for client devices.

Abstract: A personnel monitoring system. The personnel monitoring system includes a host node having an optical source for generating optical signals, and an optical receiver. The personnel monitoring system also includes a plurality of fiber optic sensors for converting at least one of vibrational and acoustical energy to optical intensity information, each of the fiber optic sensors having: (1) at least one length of optical fiber configured to sense at least one of vibrational and acoustical energy; (2) a reflector at an end of the at least one length of optical fiber; and (3) a field node for receiving optical signals from the host node, the field node transmitting optical signals along the at least one length of optical fiber, receiving optical signals back from the at least one length of optical fiber, and transmitting optical signals to the optical receiver of the host node.

Abstract: An optical transmitter includes: a digital signal process unit that generates a drive signal for generating multi-carrier signals through a plurality of independent digital signal processes, the multi-carrier signals having a cyclic prefix and to be transmitted by a parallel transmission; a synchronization unit that synchronizes clocks of the plurality of digital signal processes; and an adjust unit that reduces a delay difference of the cyclic prefix between the multi-carrier signals after the parallel transmission.

Abstract: A system and method including a parity bit encoder for encoding each n?3 bits of data to be transmitted with three parity check bits to produce blocks of n bits (n?3 information bits plus three parity bits associated with the n information bits). Each of the blocks of n bits are Gray mapped to three QAM symbols that are modulated onto an optical wavelength and transmitted to a receiver. A maximum a posteriori (MAP) decoder is used at the receiver to correct for cycle slip.

Abstract: Distributed communications systems employing one or more free-space-optics (FSO) links, and related components and methods are disclosed. In one embodiment, a distributed communications system is provided in which one or more links of a communications path located between a central unit and a remote unit include FSO provided by one or more FSO components. The FSO component(s) can replace optical fiber (or copper) cable assembly and the associated electrical/optical and optical/electrical converter circuitry. Note that FSO and fiber cable links may be used in a mixed fashion depending on the particular requirements of a given installation project for a distributed communications system. Use of such FSO components may allow temporary installations to be effectuated with greater ease and more economically since physical cable is not required for the FSO portion of the communications path.

Abstract: An RF hardline coaxial cable plant to facilitate voice and/or data services to subscriber premises in one or more neighborhood nodes of a cable communication system by conveying upstream information over an upstream path bandwidth. One or more upstream radio frequency (RF) signals have a carrier frequency of between approximately 5 MHz and 19.6 MHz and are modulated using quadrature amplitude modulation (QAM) with voice and/or data information constituting at least some of the upstream information. An example RF signal defines a channel having an average channel power, and a highest value for an average noise power between 5 MHz and 19.6 MHz in the upstream path bandwidth of a given neighborhood node, as measured over at least a 24 hour period, is at least 25 decibels (dB) below the average channel power and/or less than 20 decibels (dB) above a noise floor associated with the neighborhood node.

Abstract: A method of processing an optical input signal comprises transmitting the optical input signal through first and second signal paths, mixing the optical input signal with first and second local oscillator (LO) signals in the respective first and second signal paths to produce first and second electrical signals corresponding to different portions of a frequency spectrum of the optical input signal, and combining the first and second electrical signals to produce a coherent time-domain output signal.

Abstract: A method and system for simultaneous mitigation of optical impairment from both equalizer-phase noise interaction (EPNI) and fiber nonlinear effects (FNE) is disclosed. In one embodiment, the method is directed to simultaneous mitigation of optical impairment from both equalizer-phase noise interaction (EPNI) and fiber nonlinear effects (FNE) using a fast-adaptive multi-tap digital filter.

Abstract: A system, a method and a related device for signal transmission are provided in order to improve utilization efficiency of the fiber.

Abstract: A tunable Radio Frequency (RF) filter device includes a tunable optical source generating an optical carrier signal, and a modulator coupled to the tunable optical source and modulating the optical carrier signal with an RF input signal. The tunable RF filter device may include first and second optical waveguide paths coupled to the modulator and having first and second dispersion slopes of opposite sign from each other, one or more of the first and second optical waveguide paths comprising an optical splitter and combiner pair therein, and an optical-to-electrical converter coupled to the first and second optical waveguide paths and generating an RF output signal with a frequency notch therein based upon the tunable optical source.

Abstract: Certain implementations of the disclosed technology may include systems, methods, and apparatus for carrier-embedded optical radio-over-fiber (RoF) communications. Example embodiments of the method may include modulating a baseband signal with and an intermediate frequency (IF) and a radio frequency (RF) carrier signal to produce a RF modulated optical signal, transmitting the RF modulated optical signal to a remote access point with an optical fiber, and detecting the transmitted RF modulated optical signal. The method may also include receiving a RF uplink signal and mixing a harmonic of the RF carrier signal with the received RF uplink signal to down-convert the received RF uplink signal to an IF uplink signal. The method may include modulating a second optical source with the IF uplink signal to produce an IF uplink optical signal, transmitting the IF uplink optical signal via an optical fiber, and detecting the IF uplink optical signal.

Abstract: A system and method of digitizing an analog signal without an amplitude channel is disclosed. The system and method includes receiving an analog signal comprising a voltage v(t) and a frequency f1, producing a series of optical pulses at a sampling frequency f2 with a pulsed laser, splitting the series of optical pulses into a first optical signal and an optical reference signal, phase modulating the first optical signal with the analog signal to produce a sampled optical signal such that phase shifts between adjacent samples in the sampled optical signal does not exceed ? radians, and receiving the sampled optical signal and the optical reference signal at a photonic signal processor.

Abstract: An antenna device is provided, which includes a first antenna unit and a second antenna unit. The first antenna unit includes a first radiation module, a power divider/combiner network connected to the first radiation module, and a feeder interface connected to the power divider/combiner network. The feeder interface is configured to connect to a radio remote unit (RRU) or a base station. The second antenna unit includes a second radiation module, a transceiver array connected to the second radiation module, a baseband processing unit (BPU) connected to the transceiver array, and an interface connected to the BPU. The interface of the second antenna unit is configured to connect to a baseband unit (BBU). Therefore, after the existing passive antenna is replaced by the provided antenna device, the RRU or base station in the original network can still be used, which reduces waste of resources.

Abstract: Various embodiments of the present invention are directed to optical-based methods and expansion memory systems for disaggregating memory of computer systems. In one aspect, an expansion memory system comprises a first optical/electronic interface in electrical communication with a processor, a memory expansion board configured with memory, and a second optical/electronic interface attached to the memory expansion board. The first interface converts optical signals into electronic signals that are sent to the processor and converts electronic signals produced by the processor into optical signals. The second interface converts optical signals into electronic signals that are sent to the memory and converts electronic signals produced by the memory into optical signals. The optical signals are exchanged between the first and second interfaces. Embodiments also include methods for sending and receiving data in an expansion memory system.

Abstract: A radio-frequency (RF) remote control (10) has a user interface and transmits an RF signal (11) which designates a device (14) to be controlled and a command for that device. The RF signal is received by an intermediary device (12). The intermediary device, in turn, generates and broadcasts a plurality of high-power IR signals (13A-13F). These signals may be received directly by a controlled device (14A) or may be received indirectly by a controlled device (14B, 14C) after one or more reflections from objects (16A, 16B) and/or room surfaces (18). Thus, reliable control of the devices (14) is obtained even in situations where merely transmitting a typical IR signal may not provide reliable control of the device (14).

Abstract: The embodiments herein relate to a method in an optical network unit (103), referred to as an ONU, for providing wireless connectivity capability to the ONU (103). The ONU (103) is comprised in a communications network (100). The ONU (103) is interconnected to an optical line terminal (101), referred to as an OLT, via a wireline communications link (104) and a wireless communications link (113). The ONU (103) is configured to support a sleep mode. The ONU (103) obtains information about entry into the sleep mode. The ONU (103) identifies whether the wireless communications link (113) is activated or deactivated, and activates the wireless communications link (113) if the wireless communications link (113) is identified as deactivated. The ONU (103) enters sleep mode, and provides wireless connectivity capability to the ONU (103) by means of the wireless communications link during the sleep mode.