35results about How to "Maximize bandwidth" patented technology

An apparatus for a wireless transmission of high data rate signals such as received from an optical interface including gigabit fiber channel or a sonet. The architecture combines direct detection of the optical signal with clock and data recovery circuit and a differential signal encoder which is preferably a differential quadrature phase shift encoder and modulator pair. A millimeter wave, local oscillator and up conversion chain converts the optical input signal to a microwave carrier. In the opposite direction, the down converted signal is non-coherently phase detected and fed to a pair of synchronized clock and data recovery circuits to recover I and Q channel signals. These recovered signals are then combined prior to re-timing before they are fed back to the optical transceiver.

An image display system is disclosed that enables users to navigate very large digital images quickly and seamlessly. The system is optimized to transmit image data from a disk drive at high data rates. The image data is stored on the disk drive in a file format optimized for high speed retrieval, display, and seamless navigation. The image display system can be cascaded for showing two or more contiguous images.

A reconfigurable free-space optical inter-rack network includes a plurality of server racks, each including at least one switch mounted on a top thereof, where each top-mounted switch includes a plurality of free-space-optic link connector, each with a free-space optical connection to a free-space-optic link connector on another top-mounted switch, a single ceiling mirror above the plurality of server racks that substantially covers the plurality of server racks, wherein the single ceiling mirror redirects optical connections between pairs of free-space-optic link connectors to provide a clear lines-of-sight between each pair of connected free-space-optic link connectors, and a controller that preconfigures a free-space optical network connecting the plurality of server racks by establishing connections between pairs of free-space-optic link connectors, and that reconfigures connections between pairs of free-space-optic link connectors in response to network traffic demands and events.

A miniMAC implementation of a distributed CMTS in a hybrid fiber/coaxial (HFC) plant. The distributed CMTS comprises at least one network layer, at least one media access layer, and one or more physical layers. The at least one media access layer includes one or more miniMAC layers. The one or more miniMAC layers are remotely located from a remaining part of the at least one media access layer. The at least one network layer, the remaining part of the at least one media access layer, the one or more miniMAC layers, and the one or more physical layers each function as separate modules, enabling each layer to be in separate component locations of the HFC plant, yet having the at least one network layer connected to the remaining part of the at least one media access layer, the at least one media access layer connected to each of the one or more miniMAC layers, and each of the one or more physical layers connected to each of the one or more miniMAC layers. The one or more miniMAC layers are located in close proximity to the one or more physical layers in the HFC plant. The one or more miniMAC layers convert digital bit streams into packets and maintain timing constraints between the one or more miniMAC layers and the one or more physical layers.

In the subject three-axis pointing system, the elevation and tip mirror axes are permanently mounted with their rotation axes orthogonal to each other to eliminate gimbal lock over the hemisphere, to avoid high accelerations as the zenith or nadir pointing directions are approached, and to provide optimal two-axis beam pointing control.

An optical fiber communications apparatus comprises a housing provided with a motherboard and with a support defining plurality of card receptors. A plurality of modular cards (12, 13) are provided, each of which is engageable with the motherboard via one of the card receptors. A optical card (12) includes an optical transceiver (20) for communication using a digital, optical communications signal over a single optical fiber link (17). Each modular card (12, 13) is provided with a plurality of circuit sub-assemblies (16), each circuit sub-assembly being configured for digital communication with a respective local audio, video or data electronic device via a respective connector using a respective electronic information-carrying signal. Each circuit sub-assembly (16) is configured for communication of an audio, video or data information-carrying signal with the transceiver using the digital, optical communications signal. A processor having operating instructions is provided for ascertaining the number of modular cards engaged with the motherboard and the number of circuit sub-assemblies on each of the modular cards, and for assigning time slots for the individual information-carrying signals of the circuit sub-assemblies, thereby controlling transmission of communications between the optical transceiver and the circuit sub-assemblies, and time division multiplexing those communications over the single optical fiber link to communicate a predetermined combination of audio, video and data channels multiplexed onto a single optical channel carried by the optical fiber link. A further aspect of the invention relates to controlling the power of a signal RF input into a light source used for optical communication. The power may be regulated according to a determined noise and/or distortion of a signal RF input to the amplifier or may be varied so that it lies in a predetermined range.

A method to increase the bandwidth of a transimpedance amplifier using capactive feedback. The resultant amplifier maintains wide bandwidth, high linearity, low noise, and low input impedance independent of component variations. These characteristics greatly facilitate the economical measurement of small currents such as those arising from photodiodes and biological preparations.

A mobile wireless terminal (MWT) includes multiple wireless modems. The multiple modems have their respective transmit outputs combined to produce an aggregate transmit output. The multiple modems can concurrently transmit data in a reverse link direction and receive data in a forward link direction. The MWT is constrained to operate under an aggregate transmit power limit. Each of the multiple modems has an individual transmit limit related to the aggregate transmit power limit. An MWT controller controls the total number of modems that transmit data at any given time, based on an average energy-per-transmitted bit, or alternatively, individual energy-per-transmitted bits of the modems.

Described is a monolithic integrated circuit for use in quantum computing based on single and multiple coupled quantum dot electron- and hole-spin qubits monolithically integrated with the mm-wave spin manipulation and readout circuitry in commercial complementary metal-oxide-semiconductor (CMOS) technology. The integrated circuit includes a plurality of n-channel or p-channel metal-oxide-semiconductor field-effect transistor (MOSFET) cascodes each including a single-spin qubit or two coupled quantum dot qubits formed in an undoped semiconductor film adjacent at least one top gate. There is also a back gate formed in a silicon substrate adjacent a buried oxide layer or the at least one top gate, where the back gate controls the electron or hole entanglement and exchange interaction between the two coupled quantum dot qubits. The monolithic integrated circuits described may be used for monolithically integrated semiconductor quantum processors for quantum information processing.

The embodiment of the invention provides a data packet sending rate processing method and system, and the method comprises: a sending end sending a data packet to a receiving end according to an initial sending rate, and the initial sending rate comprises a first number of data packets sent in a unit time; the sending end receiving a second number of response messages which are returned by the receiving end and carry the data packets received by the receiving end, and judges whether the second number is equal to the first number or not; when the second number is equal to the first number, thesending end linearly increases the initial sending rate to obtain a first sending rate until the first sending rate meets a first requirement; when the second number is smaller than the first number or the first sending rate meets the first requirement, the sending end exponentially reduces the initial sending rate or the first sending rate to obtain a second sending rate until the second sendingrate meets the second requirement. According to the embodiment of the invention, the data packet sent to the receiving end by the sending end is prevented from being lost, and the bandwidth of the articulated naturality web link is utilized as much as possible.

Provided are chip antennas for near field communication and methods of manufacturing the chip antennas. A chip antenna for near field communication includes a substrate; a first antenna element on the substrate; and a second antenna element on the first antenna element. The substrate, the first antenna element, and the second antenna element are included in a single chip. The first and second antenna elements are formed outside the chip. The substrate is a lower layer including a plurality of devices. The first antenna element is a metal structure having a fish bone shape. The second antenna element is a dipole antenna.

A solar cell includes a thin film photovoltaic material structure used in absorbing light of a selective bandwidth. A multitude of dielectric front coatings are positioned on the thin film photovoltaic material structure so as to maximize admittance over the selected bandwidth. The thicknesses and indices of each of the front coatings are chosen by a global-optimization procedure to maximize the short-circuit current of the solar cell.

A source of optical supercontinuum radiation comprises a length of microstructured optical fibre and a pump laser adapted to generate lasing radiation at a pump wavelength. The length of microstructured optical fibre is arranged to receive lasing radiation at the pump wavelength to generate optical supercontinuum radiation and comprises a core region and a cladding region which surrounds the core region. The source of optical supercontinuum radiation is arranged such that at a location along the length of the microstructured optical fibre (a) the microstructured optical fibre comprises a group index (GI) versus wavelength curve having a zero crossing wavelength (ZCW) at which the group velocity dispersion has a zero crossing and such that the GI increases for wavelengths away from the ZCW such that the curve includes group indices that are greater than the GI at the ZCW for wavelengths greater than as well as less than the ZCW; (b) light having a wavelength of greater than 2000 nm propagates along the length of microstructured optical fibre and has a GI that is matched to the GI of light that propagates along the length of microstructured optical fibre and that has a wavelength of less than 400 nm; and (c) the pump wavelength is within 200 nm of the ZCW.