Software & Information Technology » Communications & Networking

Found 34 technologies within Communications & Networking RSS ATOM

Mode Demultiplexing Hybrid Simplifies Coherent Optical Front End

34398 – Researchers at the University of Central Florida have designed a single device that integrates mode demultiplexing, local oscillator power splitting, and optical 90-degree phase deconstruction using a multi-plane light converter (MPLC). As a result, the invention enables more reliable and robust coherent optical signals for communications systems. Today’s current optical front... Read More

Low-Cost Brightness Enhancement of Laser Sources Using Photonic Lanterns

33903 – New system enables manufacturers to reduce the cost and space needed to combine and boost the output brightness of semiconductor laser sources UCF researchers have invented a system that requires less physical space and is less expensive than other laser brightness enhancement systems. By uniquely integrating few-mode fiber and photonic lantern technologies, the new system enables the... Read More

(a) Schematic of few-mode Erbium-doped fiber amplifier, CL: collimating lens, FMF: few-mode (FM) fiber, EDF: Erbium-doped fiber, MO: microscope objective, DM: dichroic mirror. (b) Erbium-doped few-mode fiber cross-section.

New LIDAR Receiver Architecture Boosts Signal Quality at Lower Cost

33950 – Few-Mode Preamplified Receiver Design Improves LIDAR Performance in Autonomous Vehicles UCF researchers have developed an innovation in remote sensing technology that may help speed the large-scale deployment of LIDAR (light detection and ranging) in autonomous vehicles. With its novel few-mode (FM) preamplified receiver architecture, the new UCF LIDAR system has demonstrated a... Read More

Results of an experiment using a set of nodes in a wireless mesh network with DSM and a conventional routing approach (without DSM). As the red graph line of the non-DSM approach shows, an increase in the demand for a video increases lag time and makes the video essentially unwatchable.

Low-Cost Data Merging Technique Significantly Reduces Internet Video Traffic

33560 – Unique method enables Tier 1 internet service providers (ISPs) and large content providers to conserve network resources while distributing streaming content on demand without crashes, interruption or delays A UCF researcher has developed a distributed video routing method that can streamline a network’s internet traffic, even during times of unexpected high demand for data. Unlike current... Read More

Figure 1. Illustration of the new vehicle detection system with RFB technology alerting a wrong-way driver. Courtesy of the Central Florida Expressway Authority.

Wrong-Way Driver Detection Technologies can Help Prevent Head-On Collisions

33441 – New systems leverage vehicle and roadside technologies to thwart head-on collisions caused by wrong-way drivers Researchers at UCF and the Central Florida Expressway Authority (CFX) have patented methods for systems that help prevent head-on collisions when drivers wrongfully enter roadways. The technologies (UCF IDs: 33441, 33714 and 33716) can be used to alert and stop wrong-way drivers... Read More

The new invention analyzes real-world networks faster and with less energy

3D Crossbar Architecture for Fast, Efficient In-Memory Computing of Graph Transitive Closure

33694 – New architecture uses 3D memories to enable greater speed and energy-efficiency in parsing grammar for virtual assistants such as Amazon’s Echo “Alexa” and Google Home UCF researchers have developed a novel in-memory computing architecture that enables computing systems to perform graph transitive closure problems more efficiently. The invention also requires less energy and is faster at... Read More

Block diagram of a third embodiment of a communication system that uses adaptive interference cancellation

Methods and Devices for Interference Cancellation in Radio Frequency Communication Systems

30849 – This patent details the technique and apparatus for carrying out communications that use a radio frequency comprised of a signal and an interference component. The interference signal is generated at a control center, sent to an antenna site via fiber optics and transmitted to another control center, aircraft or ship Scientists at UCF have devised a communications system capable of... Read More

Schematic diagram of the system for measuring the free spectral range of an etalon

Extremely High Precision Measurement of the Free Spectral Range of an Etalon

30944 – Methods, systems, and devices for measurement to determine the free spectral range (FSR) of an etalon Fabry-Perot interferometers, or simply etalons, have been used for many years to select and stabilize the wavelength of tunable diode lasers for Dense Wavelength Division Multiplexed (DWDM) systems. The etalon consists of two parallel flat semi-transparent mirrors separated by a fixed... Read More

General schematic for the ultralow noise mode-locked laser and RF sinewave source

Dual Opto-Electronic Precision Clocking Protocol for Optical and Electronic Systems

30272 – The design of an opto-electronic loop that drives a harmonic mode-locked laser to produce a beat pattern signal to act as a high precision clocking protocol in both the optical and electronic regimes. Inside of every piece of modern electronic technology lays a clock. Intended to coordinate and synchronize spatially separated operations within in a circuit or across a communications... Read More

System model diagram of an optical communication system including an embodiment of impairment compensation logic

Compensation of Optical Signal Error through Digital Post-processing

31375 – The design for an error compensation method for optical information or imaging systems which suffer from linear and nonlinear impairments through an electronic postprocessing, back propagation method. Optical signal processing hinges on the system’s ability to compensate for the error accumulated by optical pulses as they travel through air or a waveguide apparatus, such as a fiber optic... Read More

Schematic setup of narrow band transmitting- receiving telescope apparatus

An Optical Free-Space Communication-based Telescope System For Narrow Band Transmission and Receiving

30031 – A communication system and method of transmitting/receiving sensitive data from a laser source through a non-confined optical free-space to any predetermined direction. The invention has been issued a patent The technology of laser communication or free-space optical communication has matured to meet the growing demand of higher data transmission to and from aircrafts, satellites and... Read More

Fig. 1. Block diagram of an embodiment of a system for optical carrier recovery

All-Optical Carrier Recovery

30930 – This invention presents the first all-optical phase and polarization recovery scheme for Phase-Shift Key signals. UCF scientists have developed the first all-optical carrier phase and polarization recovery scheme for Phase-Shift Key (PSK) signals. The technique also provides a means to carry out reliable optical carrier synchronization using a phase sensitive oscillator. Coherent optical... Read More

First preferred embodiment layout for a format insensitive 2R regeneration

Optical Multichannel Signal Regeneration

30170 – Method and apparatus for efficient optical regeneration UCF scientists have developed a more efficient all-optical regeneration system that addresses the limitations of pre-existing inventions. It can process multiple channel communications and is capable of removing the noise from both 0 and 1 bits. The growing demand for high capacity fiber optic communication systems has led to... Read More

Fig 1. Block diagram of a communication system including an embodiment of a system and method of polarization time coding for optical communications

Improved Optical Communications with Significantly Reduced Cost using Polarization Diversity Transmission

30901 – Novel system and method for improving optical communications using transmission polarization diversity to reduce impairments in fiber transmissions. UCF scientists have developed a novel and less costly system and device, to improve optical communication using polarization redundancy. The overall system is less complex than previous systems, since it uses simplified receivers, simple... Read More

Schematic diagram of an actively mode-locked laser with laser frequency stabilization through PoundDrever- Hall

Optical Frequency Self Stabilization in a Coupled Optoelectronic Oscillator (COEO)

31092 – Methods, systems and devices to provide optical frequency self-stabilization in a coupled optoelectronic oscillator (COEO). Low noise, high repetition rate mode-locked lasers have a number of potential applications in signal processing and coherent communications. For applications such as the generation of arbitrary Radio Frequency (RF) waveforms and photonic sampling, pulse-to-pulse... Read More

Schematic diagram showing an embodiment of the optical amplification to improve the performance

Wavelength Division Transmission for 1.31 μm and 1.55μm Bands Simultaneously

31137 – The design of a wavelength division multiplexed system for fully dispersion compensated operation in both 1.55μm and 1.31μm wavelength bands by use of constant-intensity modulation formats, semiconductor optical amplifiers, and selective compensation protocols. Fiber optic communications is the underpinning of the information revolution we enjoy today, and at the heart of this exciting... Read More

Schematic block diagram showing an example of an experimental setup for a binary phase-shift-keying transmitter/ phase diversity receiver

Chromatic Dispersion Compensation for Optical Communications

31078 – A method for infinite impulse response (IIR) chromatic dispersion compensation in optical communications systems that employ homodyne detection, by means of digital signal postprocessing. The advent of fiber optic communications has enabled a great deal of the connectivity we enjoy in our modern age. Fiber’s ability to carry information around the world at the speed of light has placed a... Read More

Schematic block diagram showing a switchless hybrid variable optical delay line and variable intrinsic optical attenuator fundamental design paradigm for enabling electrical and all-optical signal processing

Hybrid Photonics Modules for Variable Time Delay Signal Processing

31316 – This invention provides means and methods for the creation of a variable optical delay line consisting of: an input circuit with an electro-optic modulator, a digital delay module, a switchless analog delay module, and non-dispersive single mode fibers. Searching and tracking fast moving objects requires high speed and high spatial resolution radar beams. To fulfill this need phased array... Read More

Shows the LP Coefficient Encoding Process wherein H, is the unquantized Synthesis filter response for the i'h signal frame

Data Compression of One or Multidimensional Signals Utilizing an Energy Based Split Vector Quantizer via Multiple Transform Domain Representations

30041 – Systems containing multiple transform split quantizer codebooks that will efficiently and more accurately represent data signals by measuring the extent of distortion and automatically picks which domain is better for the particular signal being transmitted or stored Vector quantization is a powerful technique used for compressing data. The term “data” can represent signals which exist in... Read More

Schematic setup providing for generation of partially coherent beams by using phase screens

Highly Reliable High-Capacity Free-space Optical Communication with Partially Coherent Beams

30030 – A communication system and methods of transmitting and receiving sensitive data from a laser source through a non-confined optical free-space by providing a stable connection even under adverse atmospheric conditions UCF engineers and scientists have developed a novel free-space optical communication system using a laser beam for transmitting data by means of partially coherent optical... Read More

Flow diagram of an embodiment of operation of a mobile node after receiving a route request message

Virtual Router for a Robust Wireless Multihop Highly Mobile Communication Network

31107 – The invention represents a method for forming and maintaining wireless communication routes between a source node and a destination node by means of relay nodes and mobile nodes. Performance of networks are unaffected by the mobility of such nodes. Mobile wireless networks exist in two variations: those with infrastructure and those without (also known as mobile ad-hoc networks (MANETs)).... Read More

Shows Airy beam generation through Fourier synthesis using phase masks or filters in the spatial domain

Diffraction Free, Self-Bending Airy Wave Generation

31343 – Methods, apparatus and systems for generating self-bending diffraction free Airy wavepackets in both the special and temporal domain. Any ordinary beam of light spreads as it travels, thanks to the wave effect known as diffraction. Even a laser pointer’s beam gets wider and dimmer on the way to a distant screen. But in 1987 a team introduced the Bessel beam, whose intensity remains... Read More

Illustration of a crossbar lattice with a plurality of memristors

New Method Evaluates Boolean Formulas Using Sneak Paths

33132 – In crossbar computing, sneak paths are transformed from computational challenges into first-class design elements Crossbar computing and, particularly, the evaluation of Boolean formulas, has been an active and ongoing research topic. Boolean-formula computation that uses memristor circuits has also been recently examined. Previous memristive Boolean-formula evaluation strategies have... Read More

This optoelectronic gate processes multiple signals at different wavelengths simultaneously

Parallel Processing with Wavelength-Independent Optoelectronic Logic Gate

31727 – Boolean exclusive OR (XOR) and exclusive NOR (XNOR) logic gates are used for data mining, pattern extraction, data traffic control, and data routing in telecommunication applications due to their usefulness in label switching, parity checking, and pattern recognition. Currently available all-optical logic gates cannot process multiple signals at different wavelengths simultaneously as... Read More

Comparison of the frequency domain pictures of (a) a conventional COEO and (b) an intracavity etalon-based COEO

Streamlined, Ultralow Noise, Portable Frequency Comb Device

33037 – Currently available technologies that generate a low noise 10 GHz pulse train with RF phase noise utilize optical frequency division, but as a result, suffer from stabilization and calibration difficulties. The conventional optical frequency divider is comprised of four main components: a mode-locked laser, a separate continuous wave (CW) laser, a nonlinear f-2f interferometer, and an optical... Read More

Cross-section of a universal fiber. The blue circles are either air or a material with a different refractive index than the rest of the fiber

Waveguides Simultaneously Transmit Short and Long Electromagnetic Waves

32336 – Often used to transmit electromagnetic (EM) signals, optical fibers sometimes transmit signals of varying wavelengths, e.g. signals from opposite ends of the EM spectrum, from microwaves to infrared (IR). Due to the fibers’ geometry, these transmissions typically require multiple fibers, where each fiber is configured to guide waves within a limited wavelength range. This large number of... Read More

Schematic cross-sectional view of an embodiment of a coupled multi-core fiber

Multi-Core Fiber Creates Optical Supermode for Larger Effective Area

32510 – Bundled cores use crosstalk to act as a larger core with unique properties To increase capacity for optical communication systems, this technology increases the effective area of fiber modes to decrease the limitation of Kerr nonlinearity by using multi-core fiber (CMCF) structure. The new structural innovation takes advantage of the crosstalk between the cores of a conventional multi-core... Read More

Block diagram of an embodiment of a dispersion-managed wavelength division multiplexed system

Efficient Computation and Compensation of Distortion in Dispersion-Managed Optical Communications

32376 – The cost and time delay of current technologies’ computational requirements are now avoidable with this relatively low-cost method of solving nonlinear Schrodinger equations in parallel and in real-time. A new method for nonlinearity compensation on a dispersion-managed optical signal, transmitted over a long-haul optical communication link, improves upon current technologies by reducing... Read More

System model diagram of an optical communication system including an embodiment of polarization-dependent nonlinearity impairment compensation logic.

Digital Backward Propagation for WDM Systems

31726 – Channel impairments in transmission systems result in signal degradation and thus limit the carrying capacity of these systems. As complex electrical signal propagates along each span of an optical channel, and is distorted by fiber impairments, polarization-dependent nonlinearity impairment compensation logic can undo signal degradation. While backward propagation can be used to... Read More

Comparison of phase noise of the OEO with RF filter and with etalon (Normalized power)

Achieve Higher RF Frequency Stability with Lower Phase Noise

32843 – Improve radar, communications, and signal intelligence with interferometer-based optoelectronic oscillator Optoelectronic oscillators (OEOs) provide a continuous, high quality factor (Q) modulated signal in order to obtain high spectral purity. OEOs are used for a variety of purposes, including a carrier wave for communications, and radar emissions. Most OEOs use an RF filter as the mode... Read More

A system model diagram of an optical communication system including an embodiment of fiber impairment compensation logic

Digital Backward Propagation Method

31725 – When an optical signal travels through a fiber channel, the fiber introduces various types of distortion. UCF researchers have developed a method to compensate for this optical distortion, using backward propagation in the electrical domain to restore optical signal quality/integrity. The received signal, distorted by imperfections in the physical channel, is processed by modeling channel... Read More

Perspective view of an embodiment of a sensor including a plurality of vertical-cavity surface-emitting lasers (VCSELs)

Optical Detector for Improved Signal Amplification

33034 – A new method of signal amplification has been developed by a UCF researcher to offer improved signal amplification utilizing optical gain rather than traditional gain in the detector. The novel approach to optical signal amplification does not require active electronic elements, avoiding problems such as thermal run away that can cause a detector to become inoperative in harsh environments.... Read More

Illustration of a multi-core fiber that includes individual fiber cores

Modulation-Independent Polarization-Division Demultiplexing Without CMA Drawbacks

32124 – In optical communications, spectral efficiency can be increased by simultaneously transmitting signals in both transverse-magnetic (TM) and transverse-electric (TE) polarizations, and receiving the signal by polarization-division multiplexing (PDM). Conventional (PDM) requires knowledge of the original modulation format before the signal can be successfully demultiplexed. Blind demultiplexing... Read More

Exploded view of a vertically integrated three-pole filter / antenna with two cavity resonators and one patch antenna.

Larger Bandwidth, Higher Performance Patch Antennas

32119 – Compact Integrated Filter and Microstrip Antenna Patch antennas are ideal for communication and radar systems, because of their ease of fabrication and low profile. However, when high efficiency bandpass filters are added to reject out-of-band noise and interference, they typically require coaxial connections adding bulk or detuning the filter response of the low profile antenna, thus... Read More