145results about How to "Increase effective bandwidth" patented technology

Exploiting the substantive reciprocity of internode channel responses through dynamic, adaptive modification of receive and transmit weights, enables locally enabled global optimization of a multipoint, wireless electromagnetic communications network of communication nodes. Each diversity-channel-capable node uses computationally efficient exploitation of pilot tone data and diversity-adaptive signal processing of the weightings and the signal to further convey optimization and channel information which promote local and thereby network-global efficiency. The preferred embodiment performs complex digital signal manipulation that includes a linear combining and linear distribution of the transmit and receive weights, the generation of piloting signals containing origination and destination node information, as well as interference-avoiding pseudorandom delay timing, and both symbol and multitione encoding, to gain the benefit of substantive orthogonality at the physical level without requiring actual substantive orthogonality at the physical level.

Exploiting the substantive reciprocity of internode channel responses through dynamic, adaptive modification of receive and transmit weights, enables locally enabled global optimization of a multipoint, wireless electromagnetic communications network of communication nodes. Each diversity-channel-capable node uses computationally efficient exploitation of pilot tone data and diversity-adaptive signal processing of the weightings and the signal to further convey optimization and channel information which promote local and thereby network-global efficiency. The preferred embodiment performs complex digital signal manipulation that includes a linear combining and linear distribution of the transmit and receive weights, the generation of piloting signals containing origination and destination node information, as well as interference-avoiding pseudorandom delay timing, and both symbol and multitone encoding, to gain the benefit of substantive orthogonality at the physical level without requiring actual substantive orthogonality at the physical level.

A method and apparatus for increasing the bandwidth of a memory controller system are provided. According to the invention, data received at an interface of a memory controller system is compressed in the memory controller by a compression engine for storage in associated memory. The address of the data written to memory is maintained in a memory controller. When data is read from the memory for provision to an interface of the memory controller, the memory manager retrieves the data from memory and provides it to a decompression engine. The decompression engine restores the data to its original, uncompressed form. The data is then provided to the appropriate interface.

An apparatus is provided. The apparatus comprises: transceiver hardware that is capable of receiving data utilizing multiple simultaneously-received polarization diverse or spatial diverse channels and includes at least one receiver wireless element that is orthogonal frequency division multiplexing-capable and at least one transmitter wireless element; and circuitry capable of working in association with the transceiver hardware. In operation, the circuitry capable of causing the apparatus to: modulate transmit data; add a cyclic prefix to the transmit data; transmit at least one transmit signal including at least a portion of the transmit data to a node, where the apparatus includes a cellular mobile device and the node includes a cellular base station that is multiple-input-multiple-output capable; allow linkage between the cellular mobile device and the cellular base station utilizing a link; and based on a link quality of the link, allow linkage between the cellular mobile device and another cellular base station utilizing another link.

Various embodiments of the invention provide apparatus, methods, and systems for effectuating an increase in the effective bandwidth of a cable television distribution plant in a manner compatible with most common cable television systems. By using methods and systems for simultaneously transmitting a standard analog television signal and a digital data signal in a manner that minimizes interference of each with the other, one or more data carriers may be embedded within one or more analog television channels in accordance with various aspects of the present invention. These combined signals can be transmitted transparently over the existing cable television distribution plant to a location at or near the subscribers so that, among other things, that the subscriber may "pause and resume" much in the way Personal Video Recorders work.

The invention discloses a compression and decompression method based on a hardware accelerator card on a distributive-type file system, which belongs to the technical field of a distributive-type file system. The method comprises the steps of firstly fragmenting a file block when a client writes data to a data node, compressing fragments through the hardware accelerator card, and transmitting the compressed fragments to the data node; and firstly retrieving all fragments containing reading data from the data node when the client reads the data from the data node, calling the hardware accelerator card to decompress and combine the fragments, and transmitting the combined data to a superior application. The superior application can independently utilize the hardware accelerator card to compress or decompress the data in a data flow form. The hardware accelerator card is used in the distributive-type file system and the superior application, so that the data compression or decompression can be realized only through small cache, a great amount of central processing unit (CPU) resource consumed by a traditional compression method can be unloaded, and complete transparency for users of the system can be realized.

A system and method for a data write unit in a 3-D graphics pipeline including generic cache memories. Specifically, in one embodiment a data write unit includes a first memory, a plurality of cache memories and a data write circuit. The first memory receives a pixel packet associated with a pixel. The pixel packet includes data related to surface characteristics of the pixel. The plurality of cache memories is coupled to the first memory for storing pixel information associated with a plurality of surface characteristics of a plurality of pixels. Each of the plurality of cache memories is programmably associated with a designated surface characteristic. The data write circuit is coupled to the first a memory and the plurality of cache memories. The data write circuit is operable under program control to obtain designated portions of the pixel packet for storage into the plurality of cache memories.

A system and method for interactive broadcast of Internet web pages, or the like, on dedicated downstream channels in a cable television system or the like facilitates hyperlinking by a user from a broadcast television program to a web page, or between web pages, for example. In one embodiment, each user's set top is programmed with channel mapping information that maps each hyperlink request to a particular channel and time where the requested information is being broadcast in a multiplexed information stream. In response to receipt of a hyperlink request from a user actuating a remote control button, mouse or keyboard, the set top tunes to the appropriate one of the downstream channels, and downloads the web page or other information. In one embodiment to facilitate picture-in-picture capability using a single tuner, the tuner in the set top briefly tunes away from the video program to the appropriate data channel for receiving the hyperlink information. After the information associated with the hyperlink is downloaded and stored in the set top, the tuner automatically tunes back to the video program. The user can then interact with the hyperlink content and continue watching TV simultaneously. Alternatively, a scaler application is provided in the headend that reduces the size of the video program or a content related web page, for example, so that they can then be combined at the headend in a picture-in-picture format.

Turning now to the drawings, systems and methods for reading RFID transponders utilizing readers in which the Q-factor of the resonant antenna of the reader shifts over the course of the reader's interrogation cycle in response to the detection of data from FDX and HDX RFID transponders in accordance with embodiments of the invention are illustrated. One embodiment having a dynamically adjustable Q-factor, wherein the reader transmits an activation signal configured to activate half duplex and full duplex transponders includes a signal source configured to drive a resonant antenna and a dynamic switching circuit configured to set the Q-factor of the resonant antenna to a first value during the transmission of the activation signal. In addition, the dynamic switching circuit is configured to set the Q-factor of the resonant antenna to a second value below the first value during and / or in response to detection of a data signal from a full duplex transponder, the dynamic switching circuit is also configured to set the Q-factor of the resonant antenna to a third value below the second value when the RFID reader is not transmitting the activation signal, and the resonant antenna is multi-filar and the dynamic switching circuit is configured to control the Q-factor of the multi-filar resonant antenna by controlling the filars that are incorporated into the resonant antenna circuit.

The invention discloses a system and method for transmitting a terahertz radar signal based on digital pre-distortion. The system comprises a radar signal generation module, a clock control module, a digital pre-distortion module, a digital up-conversion module, a digital-to-analog conversion module, a frequency mixing module, a terahertz frequency doubling power amplification module and a radar antenna. The method comprises the steps of receiving data, updating a weight coefficient, obtaining a non-linear compensation signal, obtaining a digital up-conversion signal, obtaining a radio-frequency signal, conducting frequency doubling amplification, and transmitting a terahertz signal. By the adoption of the digital pre-distortion module, non-linear compensation is carried out on a digital baseband signal at the front end of a terahertz radar, and the performance of the terahertz radar transmission system is improved. The digital pre-distortion method is achieved by the adoption of a high-speed field programmable gate array, and the effective bandwidth and the spectral efficiency of the signals are improved.

A communication system for transmitting encoded signals over a communication channel is disclosed. The system includes a transmitter, which has a source that outputs a message signal. The transmitter also includes an encoder that generates a code word in response to the message signal. The code word has a construction that defines a plurality of paths associated with an intersymbol interference (ISI) environment of the communication channel, wherein the code word achieves a diversity based upon the number of transmit antennas and the number of ISI paths. Further, the transmitter includes a modulator that modulates the code word for transmission over the communication channel, and multiple antennas that transmit the modulated code word over the communication channel. The system encompasses a receiver that receives the transmitted code word via a number of receive antennas.

In a matrix multiplication in which each element of the resultant matrix is the dot product of a row of a first matrix and a column of a second matrix, each row and column can be broken into manageable blocks, with each block loaded in turn to compute a smaller dot product, and then the results can be added together to obtain the desired row-column dot product. The earliest results for each dot product are saved for a number of clock cycles equal to the number of portions into which each row or column is divided. The results are then added to provide an element of the resultant matrix. To avoid repeated loading and unloading of the same data, all multiplications involving a particular row-block can be performed upon loading that row-block, with the results cached until other multiplications for the resultant elements that use the cached results are complete.

A computer architecture provides both a parallel memory bus and serial memory bus between a processor system and memory. Latency-tolerant memory access requests are steered to the serial memory bus which operates to increase the available memory bus bandwidth on the parallel memory. The invention also provides integrated circuit computer memory suitable for this application.

An artifact signal correction system may include a mixing component to generate a waveform corresponding to an artifact such as an error tone, whereupon that waveform may be combined with the input waveform to substantially eliminate the artifact. In preferred embodiments, a method and apparatus for reducing spurious tones in systems of mismatched interleaved digitizers due to interleave error is provided. In various embodiments the method may include reversing the frequency content of an input signal, converting the reversed signal into interleave artifact content, delaying the input signal along a parallel path, and then subtracting the interleave content from the delayed input signal.

A multimode fiber system includes a transmitter for transmitting an optical signal and a receiver that receives the optical signal. At least one mode filter is coupled between the receiver and the transmitter and passes only a specific set of fiber modes from the transmitter to be received by the receiver. The at least one mode filter comprises a tapered core section that includes a double taper configuration joined at the narrowest regions and in which each end of the two tapers has dimensions compatible with the fiber at that end.

A wedge-shaped, number theoretical acoustic diffuser both diffuses and reflects sound while eliminating wasted space created by prior art. The inventive diffuser consists of wells of continuously variable depths which provide wide-bandwidth diffusion in a single dimension. The back of the wells are reflective planes of a plurality of angles that direct energy away from the sound source. The invention may be installed in the upper corners of a room, with the deepest end of the wedge-shape up and tapering down to the thinnest end of the wedge shape. This installation allows floor standing furniture or other objects to be placed against the wall, an impossibility with the installation of prior art. The present invention may be installed as an array in which the deepest ends of the wedge shape are butted together. This formation splits and reflects sound in two different directions both away from the sound source.

A dynamic load fixture (DLF) applies a torsion load to a unit under test (UUT) to achieve the demanding aerodynamic load exposures encountered by a control actuation system (CAS) in flight. Instead of fixing the end of the torsion bar, the DLF controls the application of torque to the torsion bar, hence the UUT via a DLF motor. The dynamic load can be independent of the angular rotation of the UUT, which allows the DLF to more effectively reproduce desired acceptance tests such as torque-at-rate and nonlinear loads. Furthermore, application of the loads through a torsion bar allows the system the compliance needed to generate precise loads while allowing for the flexibility of changing torsion bars to test a wide variety of UUT on one test platform. To achieve the demanding aerodynamic load exposures encountered by a CAS in flight, the controller must be able to respond both very fast and very precisely. Control is enhanced by the thorough characterization of the DLF and application of either “classic” negative feedback control or “modern” state-space control methods of linear observers and quadratic optimum control.

A dynamic load fixture (DLF) applies a torsion load to a unit under test (UUT) to achieve the demanding aerodynamic load exposures encountered by a control actuation system (CAS) in flight. Instead of fixing the end of the torsion bar, the DLF controls the application of torque to the torsion bar, hence the UUT via a DLF motor. The dynamic load can be independent of the angular rotation of the UUT, which allows the DLF to more effectively reproduce desired acceptance tests such as torque-at-rate and nonlinear loads. Furthermore, application of the loads through a torsion bar allows the system the compliance needed to generate precise loads while allowing for the flexibility of changing torsion bars to test a wide variety of UUT on one test platform. To achieve the demanding aerodynamic load exposures encountered by a CAS in flight, the controller must be able to respond both very fast and very precisely. Control is enhanced by the thorough characterization of the DLF and application of either “classic” negative feedback control or “modern” state-space control methods of linear observers and quadratic optimum control.

The invention provides a preparation method of a magnetic nanoparticle loaded graphene aerogel composite material and belongs to the technical field of functional magnetic materials. The method takesgraphene oxide, polyvinyl alcohol and metal salt as raw materials and comprises the following steps: preparing metal salt loaded three-dimensional porous crosslinking network graphene oxide aerogel through a hydrothermal method; freezing and drying, and roasting and reducing under a protection atmosphere to obtain the magnetic nanoparticle loaded graphene aerogel composite material in situ. The preparation method provided by the invention has the advantages of simplicity in operation, low cost and simple preparation technology and is a novel technology for macro preparation of the nanoparticlegraphene aerogel composite material; the magnetic performance and electric performance of the composite material can be adjusted through adjusting the ratio of graphene to the metal salt, and the prepared graphene aerogel composite material has the advantages of high specific surface area, small density, excellent electromagnetic performance and the like and can be used for an electromagnetic wave absorption material.

Systems and methods for providing accelerated transmission of broadcast data, such as financial data and news feeds, over a communication channel using data compression and decompression to provide secure transmission and transparent multiplication of communication bandwidth, as well as reduce the latency associated with data transmission of conventional systems.

The invention discloses a variable mass dynamic vibration absorber control method. A sensor used for collecting main system input and output vibration signals is arranged on a compound system composed of a main system-variable mass dynamic vibration absorber, and when the minimum inherent frequency omega m and the maximum inherent frequency omega n of the variable mass dynamic vibration absorber are used respectively, an amplitude-frequency response curve of a main system in the frequency range (0,omega t] is formed; as for the variable mass dynamic vibration absorber control method, while the main system works, the main system vibration signals are collected through the vibration sensor, and excitation frequency omega exerted by the external world is calculated through fast Fourier transform; the variable mass dynamic vibration absorber is controlled according to the value of the excitation frequency omega. According to the variable mass dynamic vibration absorber control method, the effective vibration reduction frequency band of the vibration absorber can be effectively broadened, the phenomenon of resonance of the main system after the vibration absorber is installed can be eliminated, and performance of the vibration absorber is more stable. No control system or actuator needs to be additionally arranged, and the variable mass dynamic vibration absorber control method is easy to achieve and has good practical value.

The information processing device in the present invention includes a memory 1 which is a DRAM featuring a burst mode, and burst-transfers data at successive column addresses, masters (13), (14), and (15) which issue access requests, and a command processing unit (11) which converts an access address that is included in the access request issued from each master. One or more of the masters access an M×N rectangular area where M and N are integers, and the command processing unit (11) converts access addresses so that a column address of data at the (K+m)th column, where K and m are integers and m≦M, of an Lth line, and a column address of data at a Kth column of an (L+n)th line, where L and n are integers and n≦N, become successive.

An accelerometer or a seismometer using an in-plane suspension geometry having a suspension plate and at least one fixed capacitive plate. The suspension plate is formed from a single piece and includes an external frame, a pair of flexural elements, and an integrated proof mass between the flexures. The flexural elements allow the proof mass to move in the sensitive direction in the plane of suspension while restricting movement in all off-axis directions. Off-axis motion of the proof mass is minimized by the use of intermediate frames disbursed within and between the flexural elements. Intermediate frames can include motion stops to prevent further relative motion during overload conditions. The device can also include a dampening structure, such as a spring or gas structure that includes a trapezoidal piston and corresponding cylinder, to provide damping during non-powered states.

This invention provides a photoelectric mixed exchange structure supporting light burst / packet exchange, which takes optical exchange as the main thing and applies a buffer storage channel composed of a photoelectric converter, RAM buffer storage and an electro optical converter connected by electric field, takes electric-field buffer storage to replace light buffer storage (FDL) and adds with suitable electric-field exchange. This invention utilizes electric-field buffer storage to solve conflict effectively, which is the main reason for loosing data in optical network.

A multimode fiber system includes a transmitter for transmitting an optical signal and a receiver that receives the optical signal. At least one mode filter is coupled between the receiver and the transmitter and passes only a specific set of fiber modes from the transmitter to be received by the receiver. The at least one mode filter comprises a tapered core section that includes a double taper configuration joined at the narrowest regions and in which each end of the two tapers has dimensions compatible with the fiber at that end.

The information processing device in the present invention includes a memory 1 which is a DRAM featuring a burst mode, and burst-transfers data at successive column addresses, masters (13), (14), and (15) which issue access requests, and a command processing unit (11) which converts an access address that is included in the access request issued from each master. One or more of the masters access an M×N rectangular area where M and N are integers, and the command processing unit (11) converts access addresses so that a column address of data at the (K+m)th column, where K and m are integers and m≦M, of an Lth line, and a column address of data at a Kth column of an (L+n)th line, where L and n are integers and n≦N, become successive.

The disclosure discloses a method and a system for channel scanning in a wireless network. The method includes that an Access Point (AP) and / or Non-AP Stations (STAs) associated with the AP performs channel scanning according to one or more of the following ways: Way A: the AP performs Overlapping Basic Service Set (OBSS) channel scanning on channels within one or more different channelizing sets with a same period or with different periods; Way B: part or all of STAs associated with the AP perform OBSS channel scanning on channels within one or more different channelizing sets with a same period or with different periods; and Way C: the AP or part or all of STAs associated with the AP performs single OBSS channel scanning on one or more channelizing sets under event triggering. With the present disclosure, the channel scanning procedure of an equipment supporting multiple channelizing set schemes under circumstance of OBSS is planned.

The invention discloses a quicksand type energy dissipation shock absorption and damping hybrid device. The device comprises a damper and an installing plate. The damper is provided with a cavity and fixed to the upper surface of the installing plate. The lower surface of the installing plate is connected with a building structural component. A cavity of the damper is filled with a plurality of balls and / or cobblestones and a mixture of sand and water. The device integrates the advantages of a tuned liquid damper, the advantages of a tuned mass damper, the advantages of a viscous damper and the advantages of a particle damper, is good in energy dissipation effect and has high applicability in the constructional engineering anti-seismic and wind resistance fields.

The invention provides a novel high-precision hybrid vibration isolation device. The novel high-precision hybrid vibration isolation device comprises an assembly plate, an intermediate separation plate, a bottom plate, an air spring and magnetorheological dampers, wherein the assembly plate and the intermediate separation plate are connected through the magnetorheological dampers; the intermediate separation plate is fixedly connected with the air spring through bolts; and the bottom plate is fixedly connected with the air spring. The magnetorheological dampers are used for isolating low-frequency vibration signals coming from the ground; and since practical ground signal sources can be transferred along multi-dimensional directions, the four magnetorheological dampers have vibration isolation capability of six DOF (Degree of Freedom) directions. The air spring and the magnetorheological dampers are reasonably connected with the intermediate separation plate, so that high-precision active and passive hybrid vibration isolation capability can be realized. According to the novel high-precision hybrid vibration isolation device disclosed by the invention, a stackable structure is adopted, so that the structure is compact; the vibration isolation capability of multi-DOF can be realized, so that the novel high-precision hybrid vibration isolation device has the advantages of high practicability, high reliability and the like; and an advanced vibration isolation means is provided for a high-precision equipment platform.

The invention discloses a system and method for transmitting a terahertz radar signal based on digital pre-distortion. The system comprises a radar signal generation module, a clock control module, a digital pre-distortion module, a digital up-conversion module, a digital-to-analog conversion module, a frequency mixing module, a terahertz frequency doubling power amplification module and a radar antenna. The method comprises the steps of receiving data, updating a weight coefficient, obtaining a non-linear compensation signal, obtaining a digital up-conversion signal, obtaining a radio-frequency signal, conducting frequency doubling amplification, and transmitting a terahertz signal. By the adoption of the digital pre-distortion module, non-linear compensation is carried out on a digital baseband signal at the front end of a terahertz radar, and the performance of the terahertz radar transmission system is improved. The digital pre-distortion method is achieved by the adoption of a high-speed field programmable gate array, and the effective bandwidth and the spectral efficiency of the signals are improved.