Class / Patent application number | Description | Number of patent applications / Date published |
398044000 | Mode | 41 |
20100135657 | AUTOMATICALLY SELECTING A CLOCK RECOVERY MODE WITHIN OPTICAL NETWORK TERMINALS - This disclosure is directed to techniques for facilitating clock recovery in optical networks. An optical network terminal (ONT) that terminates a fiber link of an optical network includes a clock mode selection module that automatically selects a clock recovery mode based on a type of optical network to which the ONT connects and a type of service provided to one or more subscriber devices coupled to the ONT. By automatically selecting the clock recovery module, an administrator or other user need not provision this aspect of the optical network, thereby reducing administrative tasks and facilitating the provisioning of the optical network. In addition, the techniques enable selection of the most optimal clock recovery mode based on the current state of the optical network. | 06-03-2010 |
20100329671 | TRANSVERSE-MODE MULTIPLEXING FOR OPTICAL COMMUNICATION SYSTEMS - An optical communication system having an optical transmitter and an optical receiver optically coupled via a multi-path fiber. The optical transmitter launches, into the multi-path fiber, an optical transverse-mode-multiplexed (TMM) signal having a plurality of independently modulated components by coupling each independently modulated component into a respective transverse mode of the multi-path fiber. The TMM signal undergoes inter-mode mixing in the multi-path fiber before being received by the optical receiver. The optical receiver processes the received TMM signal to reverse the effects of inter-mode mixing and recover the data carried by each of the independently modulated components. | 12-30-2010 |
20110002689 | OPTICAL OFDM RECEIVER, OPTICAL TRANSMISSION SYSTEM, SUBCARRIER SEPARATION CIRCUIT, AND SUBCARRIER SEPARATION METHOD - A high-performance optical OFDM receiver is realized. A subcarrier separation circuit receives an optical OFDM signal consisting of two subcarriers A and B and separates a subcarrier component, signal light and first local oscillator light are input to the subcarrier separation circuit, the subcarrier separation circuit converts the signal light and the first local oscillator into a baseband electrical signal, the subcarrier separation circuit converts the baseband electrical signal into a digital signal, the subcarrier separation circuit shifts the frequency of the converted digital signal so that a center frequency of the subcarrier A becomes zero, and the subcarrier separation circuit adds a frequency shifted signal to a signal obtained by delaying the frequency shifted signal by ½ of a symbol time to separate a component of the subcarrier A. | 01-06-2011 |
20120207470 | SPATIAL DOMAIN BASED MULTI DIMENSIONAL CODED MODULATION FOR MULTI TB PER SECOND SERIAL OPTICAL TRANSPORT NETWORKS - An optical transport network based on multimode/multicore fibers includes a mode-multiplexer to multiplex independent data streams from one or more transmitters; a multimode erbium-doped fiber amplifier (MM EDFA) to compensate for MMF loss; a multimode optical add-drop multiplexer (MM OADM) to add and/or drop multimode channels in multimode networks; a multimode optical cross-connect; and a mode-demultiplexer to separate various mode streams to one or more receivers. | 08-16-2012 |
20120230687 | OPTICAL COMMUNICATION SYSTEM - The present invention causes spatial-mode light emitted from an optical fiber ( | 09-13-2012 |
20120251105 | METHOD AND APPARATUS FOR PROVIDING A LINE OF SPOTS LAUNCH OF LIGHT INTO AN END OF A MULTIMODE OPTICAL FIBER - A method and an apparatus are provided for launching light into an entrance facet of a MMF of an optical MMF link in a way that excites one or more targeted higher-order mode groups in the MMF. The light is launched into the entrance facet of the MMF as a line of phase-modulated spots, referred to herein as a “line launch”. The line launch causes one or more targeted higher-order mode groups to be excited in the MMF. The use of the line launch to excite one or more higher-order mode groups in the MMF increases the bandwidth of the link and allows overall link lengths to be increased. In addition, the use of the line launch is reliable and robust despite defects in the MMF and despite connector offsets. Thus, the use of the line launch ensures that a sufficient increase in link bandwidth will be achieved despite the existence of defects in the MMF and even if there is some amount of optical misalignment due to the connector being offset relative to the corresponding receptacle. | 10-04-2012 |
20130071114 | FEW MODE OPTICAL FIBERS FOR MODE DIVISION MULTIPLEXING - A few mode optical fiber suitable for use in a mode division multiplexing (MDM) optical transmission system is disclosed. The optical fiber has a graded-index core with a radius R | 03-21-2013 |
20130071115 | FEW MODE OPTICAL FIBERS FOR MODE DIVISION MULTIPLEXING - An optical fiber comprising: (i) a core having a refractive index profile; (ii) an annular cladding surrounding the core; (iii) a primary coating contacting and surrounding the cladding, the primary coating having an in situ modulus of less than 0.35 MPa and an in situ glass transition temperature of less than −35° C.; and (iv) a secondary coating surrounding the primary coating, the secondary coating having an in situ modulus of greater than 1200 MPa; wherein the refractive index profile of said core is constructed to provide an LP11 theoretical cutoff wavelength greater than 2.0 μm and an effective area greater than 110 microns | 03-21-2013 |
20130077967 | Optical Networks Using Multi-spatial Mode Media - A fiber optic system includes a transmitter for transmitting high-speed streaming electrical data to a receiver for receiving the high-speed data. In order to transmit multiple channels in the system at high-speeds, an electrical data signal is converted into multiple optical sub-signals. Each of the multiple optical sub-signals are transmitted at the common wavelength on multi-spatial mode media. The receiver receives the multiple optical sub-signals as a multi-spatial mode optical signal and separates the multi-spatial mode optical signal into branch signals having a common wavelength. The receiver mixes each of the branch signals with optical carrier waves having the common wavelength and converts the branch signals into electrical signals. Digital signal processing is used to recover the data sub-signals which are used to recover the original data signal. | 03-28-2013 |
20130089326 | NONBINARY LDPC CODED MODULATION WITHOUT BANDWIDTH EXPANSION FOR HIGH-SPEED OPTICAL TRANSMISSION - Systems and methods for data transport, comprising encoding one or more streams of input data using nonbinary low density parity check (NB-LDPC) encoders, corresponding to orthogonal polarization states. Receiving one or more streams of input data using a buffer coupled to the encoders, the data written to the buffer bR bits at a time, where R is the code rate. Generating one or more signals using a 2 | 04-11-2013 |
20130142509 | OPTICAL TRANSPORT NETWORK LINE MANAGEMENT SYSTEM AND METHODS - An Optical Transport Network (OTN) mode management system includes a controller communicatively coupled to at least one OTN port. The controller is configured to operate an OTN line Optical channel Data Unit level k (ODUk) mode management system for the at least one OTN port, and the OTN line ODUk mode management system is configured to support different multiplexing scenarios on the OTN port with no loss of control plane packets on aggregated links. A network element includes at least one port with a plurality of lines associated therewith, a controller communicatively coupled to the at least one port, and an OTN line ODUk mode management system executed on the controller for managing the plurality of lines on the at least one port. A method includes configuring and dynamically managing modes of a plurality of OTN lines in a link. | 06-06-2013 |
20130230319 | MULTIMODE OPTICAL FIBER, MODE DELAY ADJUSTER FOR FIBER SYSTEMS, AND METHODS TO USE SUCH FIBERS, ADJUSTERS, AND SYSTEMS - An apparatus includes a multi-mode optical fiber having a selected plurality of optical propagating modes. The selected plurality may include only a proper subset of or may include all of the optical propagating modes of the multi-mode optical fiber. Each optical propagating mode of the selected plurality has a group velocity that varies over a corresponding range for light in, at least, one of the optical telecommunications C-band, the optical telecommunications L-band, and the optical telecommunications S-band. The ranges corresponding to different ones of the modes of the selected plurality are non-overlapping. The ranges of a group velocity-adjacent pair of the ranges are separated by a nonzero gap of less than about 10,000 meters per second. | 09-05-2013 |
20140056583 | SYMBOL ALIGNMENT IN HIGH SPEED OPTICAL ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING TRANSMISSION SYSTEMS - The present invention discloses a method for symbol synchronisation in high speed optical orthogonal frequency division multiplexing (OOFDM) transmission systems via coding the electrical OFDM symbols by adding an independent low power-level alignment signal, converting the encoded signal into the optical domain for transmission, and in the receiver converting the received optical signal to the electrical domain and digitally processing to detect the symbol alignment offset by utilising the independent low-power level alignment signal. The present invention is suitable for point-to-point and point-to-multi-point OOFDM networks and has the additional features of timeslot and frame alignment, compensation for receiver sampling clock offset and providing physical layer network security. The superimposed training signal is a DC offset whose value varies at symbol transitions. | 02-27-2014 |
20140079392 | Multi-Mode Optical Transmission Line With Differential Modal Group Delay Compensation - An apparatus includes an all-optical transmission line having, at one wavelength, a pair of relatively orthogonal optical propagating modes whose local group velocities differ along a part of the all-optical transmission line. The all-optical transmission line is formed by a sequence of optically end-connected multi-mode fiber segments. The segments include, at least, 80% of the optical path length of the all-optical transmission line. Each segment is configured such that a differential group delay between the pair varies monotonically there along and changes by, at least, 200 pico-seconds thereon. | 03-20-2014 |
20140140694 | DISTRIBUTED SPATIAL MODE PROCESSING FOR SPATIAL-MODE MULTIPLEXED COMMUNICATION SYSTEMS - A method and system for distributed spatial mode processing is disclosed where a plurality of optical signals is received via a plurality of spatial modes on a first optical link, spatial mode conversion is performed on the plurality of optical signals to switch the plurality of optical signals to different ones of the plurality of spatial modes and the plurality of optical signals is transmitted via the different ones of the plurality of spatial modes on a second optical link where spatial mode filtering may occur. | 05-22-2014 |
20140153922 | Multi-Mode Optical Communication With Mode Mixtures - An apparatus includes an optical transmitter having a plurality of optical data modulators and an end-face coupler. Each of the optical data modulators is configured to output a corresponding data-modulated optical carrier. The optical end-face coupler is configured to direct the data-modulated optical carriers into a pattern of light beams to illuminate an end-face of a multi-mode optical fiber with a pattern of light spots. The optical end-face coupler is configured to cause each of the data-modulated optical carriers to excite a set of orthonormal optical propagating modes of the multi-mode optical fiber. Some of the orthonormal optical propagating modes of the set have nontrivially differing intensity and/or phase profiles. | 06-05-2014 |
20140199065 | MULTIMODE MULTIPLEXING - A system includes a transmitter to multiplex a plurality of modulated optical signals and an unmodulated optical signal and to transmit the plurality of modulated optical signals and the unmodulated optical signal along a transmission path. The system also includes a receiver to de-multiplex each of the plurality of modulated optical signals and the unmodulated optical signal and to demodulate each of the plurality of modulated optical signals with the unmodulated optical signal to coherently detect a modulating signal from each of the plurality of modulated optical signals. | 07-17-2014 |
20140199066 | MODE MULTIPLEXING OPTICAL COMMUNICATION SYSTEM - An optical communication system is disclosed. The optical communication system comprises an optical transmitter and a substantially circular multi-mode optical fiber. The optical transmitter comprises a generator of at least two free space circular vortices and comprises an optical element configured to receive the at least two free space circular vortices and to couple them to an input facet of the optical fiber. The optical fiber is configured to receive at the input facet the at least two free space circular vortices and is configured to generate therefrom at least two corresponding guided circular vortices having respective propagation constants, wherein the values of the propagation constants at a defined frequency are different each other. | 07-17-2014 |
20140205283 | MULTIDIMENSIONAL CODED-MODULATION FOR HIGH-SPEED OPTICAL TRANSPORT OVER FEW-MODE FIBERS - Systems and methods for data transport are provided which encode streams of data using low density parity check (LDPC) encoders and map data streams to symbols, by assigning bits of symbols to a signal constellation and associating bits with constellation points. Constellation points are generated using a D-dimensional optimum signal constellation design (OSCD) method. The OSCD determines an optimum source distribution for an optical channel, generates D-dimensional training sequences from the optimum source distribution, determines new signal constellation points as the center of mass for each D-dimensional cluster of points, and repeats these steps until convergence or until a predetermined number of iterations is reached. Coordinates obtained by the D-dimensional OSCD method are stored in a look-up-table (LUT), points are selected from the LUT using encoded data streams, coordinates are input into a D-dimensional modulator after digital-to-analog conversion (DAC), and a modulated signal is transmitted over an optical medium. | 07-24-2014 |
20140219653 | MODIFIED ORTHOGONAL POLYNOMIALS BASED HYBRID CODED-MODULATION FOR MULTI-TB/SECOND OPTICAL TRANSPORT - A system and method for transmitting data, including one or more Low Density Parity Check (LDPC) encoders configured to encode one or more streams of input data; a signal constellation generation module configured to generate one or more signal constellations; one or more modulators configured to generate one or more signals using hybrid multidimensional coded modulation; a modified orthogonal polynomial generation module configured to generate modified orthogonal polynomials for use as electrical basis functions; and one or more mode-multiplexers and transmitters configured to mode-multiplex and transmit one or more LDPC-coded data streams over a transmission medium. | 08-07-2014 |
20140248052 | MODE-ROUTED OPTICAL NETWORKS - In one embodiment, an optical network includes multiple cross-connects configured to switch spatial modes in which signals are propagated across the network and multiple fiber links that extend between pairs of cross-connects, the fiber links including multimode optical fibers that support multiple spatial modes. | 09-04-2014 |
20140270759 | ULTRA-HIGH-SPEED OPTICAL TRANSPORT BASED ON ADAPTIVE LDPC-CODED MULTIDIMENSIONAL SPATIAL-SPECTRAL SCHEME AND ORTHOGONAL PROLATE SPHEROIDAL WAVE FUNCTIONS - Systems and methods for transmitting data, including encoding one or more streams of input data using one or more adaptive Low Density Parity Check (LDPC) encoders, wherein the encoders generate one or more signal constellations; modulate one or more signals using hybrid multidimensional coded modulation; apply orthogonal prolate spheroidal wave functions as electrical basis functions; generate one or more spectral band group signals by selecting and combining two or more spectral band groups with center frequencies that are orthogonal to each other; and spectral-mode-multiplex and transmit the one or more adaptive LDPC-coded data streams including the one or more spectral band group signals combined into corresponding spatial modes over a transmission medium. | 09-18-2014 |
20150030325 | MULTI-MODE FIBER-BASED OPTICAL TRANSMISSION/RECEPTION APPARATUS - An optical transmission apparatus includes: a transmission light source configured to generate single-mode light of a specific wavelength; a power coupler configured to split the light generated by the transmission light source into a plurality of light sections; at least one modulator configured to modulate an electrical signal carrying different data into at least one optical signal using the light section from the power coupler; and a mode multiplexer configured to convert the modulated optical signal into a different mode, and to transmit the mode-converted optical signal to a fiber. | 01-29-2015 |
20150043910 | METHOD OF OPTICAL DATA TRANSMISSION USING MODE DIVISION MULTIPLEXING - A method and a device for optical data transmission are proposed. Incoming optical signals having respective incoming waveguide modes are mapped into outgoing optical signals having respective outgoing waveguide modes, using optical spatial modulators, whose multiplicative patterns correspond to the respective electrical field patterns of the respective incoming or outgoing waveguide modes. An incoming optical signal, whose respective incoming waveguide mode is of an azimuthal order equal to zero, results in an outgoing optical signal, whose respective outgoing waveguide mode is of an azimuthal order equal to zero. Furthermore, two incoming optical signals, whose respective second incoming waveguide modes are of a same azimuthal order greater than zero, of a same radial order, and orthogonal to each other result in respective outgoing signals, whose respective outgoing waveguide modes are off a same azimuthal order greater than zero, of a same radial order and orthogonal to each other. | 02-12-2015 |
20150050019 | FIBER OPTIC CONNECTORS AND CONNECTORIZED FIBER OPTIC CABLES THAT INCLUDE INTEGRATED PHOTONIC OPTICAL MODE FIELD CONVERTERS AND RELATED METHODS - Fiber optic connectors are provided that include a substrate having a groove therein, an optical fiber that is at least partly in the groove, an optical mode field converter or other focusing reflector that is positioned to receive an optical signal that is output from the optical fiber and a housing that surrounds the substrate and the optical fiber. | 02-19-2015 |
20150071631 | Device of Optical Passive Repeater Used in Optical Multimode communication - An optical passive repeater is provided. The repeater is operated under a state of polariton Bose-Einstein condensation (BEC). A phase transition from a thermal polariton state to a condensed polariton state is controlled, where system temperatures and densities are lower than thermal dissociation temperatures and nonlinear saturation densities, respectively. Original input multimode laser signals are transformed into final output single-mode laser signals. Thus, the polariton BEC passive repeater becomes a power-efficient and low-cost device to increase the reach of optical links without sacrificing its signal quality and integrity. | 03-12-2015 |
20150086200 | Space To Wavelength Superchannel Conversion - An apparatus inputs an input configured to receive an input optical signal, and an output configured to output an output optical signal. A superchannel converter is coupled between the input and the output. The superchannel converter is configured to convert N spatial modes of the input optical signal to M spatial modes of the output optical signal. | 03-26-2015 |
20150086201 | Data Multiplexing And Mixing Of Optical Signals Across Propagation Modes - An apparatus, e.g. an optical device, includes an optical transmitter and a mixer. The transmitter is configured to transmit a plurality of optical data channels that each include at least one spectral component at a same frequency. The mixer is configured to combine a first data channel with a second data channel. The combining is such that first and second optical channels output by the optical transmitter each include contributions from the first and second data channels at the same frequency. | 03-26-2015 |
20150098697 | SYSTEM AND METHOD FOR MODE DIVISION MULTIPLEXING - A system and method are provided for coupling a plurality of optical signals, such as data signals, between a corresponding plurality of single mode optical fibers (SMFs) and a multi-mode optical fiber (MMF), by optically coupling the optical signals of the SMFs with respective spaced-apart regions at a facet of the MMF, such that at least some of the regions partially overlap with a plurality of different spatial modes supported by the MMF. The optical coupling is performed by utilizing imaging and beam shaping optics configured to couple each of the SMF optical signals and the respective region at the MMF's optical pupil by carrying out the following: (i) imaging the SMF optical signal propagating in between the associated SMF and the respective region of the MMF to focus the optical signal emanating from the SMF onto the respective region or vice versa; and (ii) shaping the optical signal being focused to convert a lateral field distribution thereof, between a first predetermined field distribution corresponding to the SMF's spatial mode and a second predetermined field distribution at the respective region. | 04-09-2015 |
20150104168 | NON-BINARY LDPC CODED MODE-MULTIPLEXED FOUR-DIMENSIONAL SIGNALING BASED ON ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING - Systems and methods for encoding streams of input data using at least two nonbinary low density parity check (NB-LDPC) encoders; generating NB-LDPC coded optimum signal constellations; performing orthogonal frequency division multiplexing (OFDM) on the NB-LDPC coded four-dimensional (4-D) optimum signal constellations; generating signals using mappers, the mappers configured to assign bits of signals to the signal constellations and to associate the bits of the one or more signals with signal constellation points. Output of the 4-D mappers is modulated using a 4-D OFDM transmitter and a 4-D modulator onto a transmission medium using block coded-modulation, and the modulated output is transmitted by mode-multiplexing independent 4-D OFDM data streams onto fiber. The transmitted modulated output is received, mode-demultiplexed, and demodulated using polarization diversity receivers, one per spatial mode, channel estimation and compensation methods are performed to overcome impairments in the transmission medium; and received data is decoded using non-binary decoders. | 04-16-2015 |
20150333865 | ORBITAL ANGULAR MOMENTUM MULTIPLEXING FOR DIGITAL COMMUNICATION - Optical signals with different orbital angular momentum (OAM) modes are used to multiplex data for different receiver together or a light signal. The OAM based multiplexing may be used in addition to other multiplexing schemes such as time division multiplexing, polarization multiplexing and so on. Capacity of existing optical network infrastructure can be increased significantly using OAM modulation, and data communication can be secured at the same time. | 11-19-2015 |
20150349890 | MODAL MUTLIPLEXED FIBER OPTIC COMMUNICATION SYSTEM AND METHOD USING A DIELECTRIC OPTICAL WAVEGUIDE STRUCTURE - A novel fiber optic modal multiplexed data communication system is shown and claimed, wherein an optical fiber end structure may comprise a truncated cylindrical wedge that is angled with respect to the longitudinal axis of the optical fiber, and further comprises a lip that is generally perpendicular to the longitudinal axis of the optical fiber on both ends of the fiber. The system and method of the invention may comprise at least one but preferably a plurality of laser transmitters to illuminate an optical fiber and at least one but preferably a plurality of optical detectors to detect radiated standing wave and linear polarized modes emanating from the fiber end face. The laser transmitters may be modulated to carry information to at least one receiver, and may comprise Forward Error Correction encoding. The invention may employ single, few mode or multimode optical fibers. | 12-03-2015 |
20150349910 | Systems and Techniques for Orbital Angular Momentum Based Reconfigurable Switching - In at least one aspect, a device for Orbital Angular Momentum (OAM) based optical communication includes a first spatial light modulator configured to down-convert a first plurality of higher-order OAM modes from a communication signal to a second plurality of higher-order OAM modes and a first Gaussian mode, a second spatial light modulator configured to drop the first Gaussian mode and add a second Gaussian mode to the second plurality of higher-order OAM modes, and a third spatial light modulator configured to up-convert the second plurality of higher-order OAM modes and the second Gaussian mode to a third plurality of higher-order OAM modes for further communications. | 12-03-2015 |
20150372782 | A NOVEL MODE DIVISION MULTIPLEXING OPTICAL LINK - The invention is a method and apparatus for creating mode division multiplexed channels capable of integration into photonic integrated circuits with direct spatial separation at the receiver end, thus removing the need for a DMUX module or at least significantly simplifying it. This is achieved by using a set of actuators that induce controllable mode mixing in a multi-mode fiber (MMF) at the transmitter in such a way that spatially separated channels are achieved at the receiver. As a result, no DMUX is required and failure of a single channel does not cause total communication link failure as occurs in links implemented with MUX/DMUX. | 12-24-2015 |
20160043826 | DISTRIBUTED SPATIAL MODE PROCESSING FOR SPATIAL-MODE MULTIPLEXED COMMUNICATION SYSTEMS - A method and system for distributed spatial mode processing is disclosed where a plurality of optical signals is received via a plurality of spatial modes on a first optical link, spatial mode conversion is performed on the plurality of optical signals to switch the plurality of optical signals to different ones of the plurality of spatial modes and the plurality of optical signals is transmitted via the different ones of the plurality of spatial modes on a second optical link where spatial mode filtering may occur. | 02-11-2016 |
20160065315 | System and Method for Recovering Carrier Phase in Optical Communications - The embodiments of the invention provide methods to deal with problems of cycle slips, angular skew, and residual phase noise for high-speed optical communications employing any arbitrary high-order multi-dimensional modulation formats. The embodiments use a slip process analyzer, a skew angle estimator, and a phase noise variance estimator to provide feedforward soft-decision information of a carrier phase recovery (CPE) for more accurate likelihood calculation based on a high-order hidden Markov model (HMM). The log-likelihood calculation can be done jointly in dual polarization with joint Markov state transition. Some embodiments use a kernel filter or a particle filter for log-likelihood calculation. | 03-03-2016 |
20160094308 | OPTICAL INTERCONNECTION METHODS AND SYSTEMS EXPLOITING MODE MULTIPLEXING - Optical solutions to address and overcome the issues of superseding/replacing electrical interconnection networks have generally exploited some form of optical space switching. Such optical space switching architectures required multiple switching elements, leading to increased power consumption and footprint issues. Accordingly, it would be beneficial for new optical, e.g. fiber optic or integrated optical, interconnection architectures to address the traditional hierarchal time-division multiplexed (TDM) space based routing and interconnection to provide reduced latency, increased flexibility, lower cost, and lower power consumption. Accordingly, it would be beneficial to exploit networks operating in multiple domains by overlaying mode division multiplexing to provide increased throughput in bus, point-to-point networks, and multi-cast networks, for example, discretely or in combination with wavelength division multiplexing. | 03-31-2016 |
20160127073 | APPLICATION OF ORBITAL ANGULAR MOMENTUM TO FIBER, FSO AND RF - A communications system includes transmitter circuit for receiving a plurality of input data streams and applying a different orthogonal function to each of the plurality of input data streams. The transmitter circuit processes each of the plurality of input data streams having the different orthogonal function applied thereto to spatially locate a first group of the plurality of input data streams having the different orthogonal function applied thereto onto a first carrier signal and to spatially locate a second group of the plurality of input data streams having the different orthogonal function applied thereto onto a second carrier signal. The transmitter circuit temporally locates the first carrier signal and the second carrier signal onto a third carrier signal and transmits the third carrier signal over a communications link. A receiver circuit receives the third carrier signal over the communications link and separates in time the third carrier signal into the first carrier signal and the second carrier signal. The receiver then separates the plurality of input data streams having the different orthogonal function applied thereto into the plurality of input data streams each having the different orthogonal function applied thereto. Finally, the receiver removes the orthogonal function from each of the plurality of input data streams and outputs the plurality of input data streams. | 05-05-2016 |
20160149665 | TRANSMISSION DEVICE WITH MODE DIVISION MULTIPLEXING AND METHODS FOR USE THEREWITH - Aspects of the subject disclosure may include, for example, a transmission device that includes at least one transceiver configured to modulate data to generate a plurality of first electromagnetic waves. A plurality of couplers are configured to couple at least a portion of the plurality of first electromagnetic waves to a transmission medium, wherein the plurality of couplers generate a plurality of mode division multiplexed second electromagnetic waves that propagate along the outer surface of the transmission medium. Other embodiments are disclosed. | 05-26-2016 |
20160182181 | WIRELESS DISTRIBUTED ANTENNA MIMO | 06-23-2016 |
20190149261 | OPTICAL MODE-DIVISION MULTIPLEXING USING SELECTED MODE COUPLING BETWEEN AN OPTICAL RESONATOR AND A SIGNAL TRANSMISSION LINE | 05-16-2019 |