Abstract: A physical layer convergence protocol (PLCP) data structure (300) transmitted in a multiple-input-multiple-output (MIMO) communication system. The PLCP data structure comprises a legacy portion including a legacy preamble (311) and a legacy header (312), wherein the legacy preamble (311) and the legacy header (312) carry information compliant with at least a WiMedia standard; and a high throughput (HT) portion including a HT preamble (321) and a HT header (322), and wherein the HT preamble (321) carries information enabling a receiver of the MIMO communication system to decode received signals.

Abstract: A method (400) for performing a fast multiple-subcarrier-joint-modulation (MSJM) precoding. The method comprises grouping input information bits into bit blocks (S410); converting the bit blocks into bit vectors (S420); mapping a first group of bits of each bit vector to a real dimension of symbols in a symbol vector (S430); mapping a second group of bits of each bit vector to an imaginary dimension of symbols in the symbol vector (S430), wherein the mapping of the real dimension and the mapping of imaginary dimension are performed simultaneously; and modulating symbol vectors into data subcarriers (S440).

Abstract: A multi-band communication system (400). The system includes a plurality of transmit channels (420-1, 420-N), wherein each transmit channel (420-X) transmits data streams through a single sub-band; and a plurality of receive channels (460-1, 460-N), wherein each receive channel (460-X) receives data streams of a single sub-band. In an embodiment of the invention, each transmit channel (420-X) and its respective receive channel (460-X) are configured with a different set of channel codes to encode and decode the data. The set of channel codes is determine by an more channel codes adaptive modulation coding (AMC) controller (461-X) based on the condition of the link between a transmit channel (420-X) and a receive channel (460-X).

Abstract: An orthogonal frequency division multiplexing (OFDM) multiband transmitter (200) adapted to perform multiple-subcarrier-joint-modulation (MSJM) precoding. The transmitter comprises a bit interleaver (220) for independently interleaving bit blocks and grouping bits of each interleaved bit block to bit groups; a symbol mapping unit (230) for mapping each of the bit groups to symbols according to a MSJM scheme; and a symbol interleaver (240) for allocating the symbols to data subcarriers of a plurality of consecutive OFDM symbols.

Abstract: An efficiency controlling module of a power amplifier for wireless communication device includes an attenuator, a filter, and a DC/DC convertor electronically connected in series. The attenuator obtains and attenuates efficiency controlling signals. The filter reduces noise in the efficiency controlling signals. The DC/DC convertor dynamically adjusts an output voltage according to the efficiency controlling signals.

Abstract: The present invention discloses a distributing method for a file content of an interactive network television system, including the following steps: a content preparation function module transmitting a distributing request of a file content to a content distribution and position control function module; the content distribution and position control function module producing a distributing task based on a distributing strategy after it receives the distributing request of the content preparation function module; after selecting the content delivery and storage function module, the content distribution and position control function module forwarding the file content distributing request from the content preparation function module to the content delivery and storage function module; and based on the response of the content delivery and storage function module transmitted by the content distribution and position control function module, the content preparation function module transmits the file content to the co

Abstract: A method, system, and server for issuing directory tree data and a client. The method includes: pre-storing Identities (IDs) for data blocks obtained by dividing directory tree data according to an agreed protocol, and generating and storing validity IDs for the data blocks according to the agreed protocol; receiving, by a directory tree server, an ID and a validity ID of a data block that the client requests to download, and querying for a validity ID of a data block having the same ID at a directory tree server side. If the validity ID of the data block having the same ID at the directory tree server side is the same as the validity ID received from the client, issuing a matching success message to the client; otherwise, issuing, a matching failure message and the data block at the directory tree server side having the same ID to the client.

Abstract: A method and system for adjusting transmission power of a communication device is provided. The method obtains a transmission power value and a receiving power value of the communication device from a storage system of the communication device, and obtains a power control signal received by the communication device when the call connection between the communication device and a base station via a wireless communication network is established. The method further adjusts the transmission power value according to the power control signal, and calculates a power sum by adding the transmission power value to the receiving power value. In addition, the method modifies the transmission power value according to a difference between the power sum and the receiving power value.

Abstract: Relay nodes relay data from a source node (110) to a destination node (130) in an asynchronous cooperative wireless communication system. Each relay node (120) includes a serial-to-parallel partitioner (212), a row selector (214), a cyclic shifter (216) and an SCBT modulator (218). The serial-to-parallel partitioner partitions symbols corresponding to received information into parallel blocks. The row selector selects one row of a coding matrix for each of the parallel blocks and constructs symbol blocks corresponding to the parallel blocks based on the selected row. The cyclic shifter shifts a cyclic delay of each of the symbol blocks and generates shifted symbol blocks corresponding to the symbol blocks. The SCBT modulator pads a guard interval to each shifted symbol block to remove the effects of asynchronous relay transmission.

Abstract: Antenna apparatus, and an associated method, for a mobile station, or other radio device. A folded conducting strip is formed upon multiple sides of a cube-shaped, or other three-dimensional substrate of small dimensions. The conducting strip exhibits resonance at multiple frequencies, such as at frequencies encompassing the 800/900/1800/1900/2200 MHz frequencies. Because of the positioning of the conducting strip upon the multiple sides of the substrate, a conducting strip of increase length is provided while permitting the dimensional requirements of the antenna structure to be small. Multiple antennas are able to be positioned at the radio device to provide for multiple-input, multiple-output radio operation.

Abstract: A frame timing synchronization technique for orthogonal frequency division multiplexing (OFDM) systems is presented. First, a coarse synchronization technique generates a coarse frame timing estimate. The coarse synchronization technique applies a sliding window differentiator to the output of a conventional auto-correlator to mitigate the plateau effect associated with conventional auto-correlation techniques. Second, a fine synchronization technique generates a fine frame timing estimate. The fine synchronization technique uses the coarse frame timing estimate to reduce the number of cross-correlation calculations. Additionally, the fine synchronization technique acquires a fine frame timing estimate based on a signal-to-interference ratio (SIR) metric, which is more robust to multi-paths and pseudo multi-paths caused by cyclic delay diversity (CDD) schemes than conventional cross-correlation synchronization techniques.

Abstract: A multiple input-multiple output antenna assembly with high isolation between the antennas is disclosed. The antenna assembly includes a substrate with a ground layer at its surface. Two antennas are disposed opposing each other on the substrate. An isolation element in a form of a patterned slot is interposed between the first and second antennas on the ground plane. A first signal port is provided for applying a first signal to excite the first antenna and a second signal port is provided for applying a second signal to excite the second antenna. The isolation element provides isolation that inhibits electromagnetic propagation between the two antennas.

Abstract: The present invention provides methods of making micron, submicron or nanometer dimension thermoplastic polymer microfibrillar composites and fibers, and methods of using the thermoplastic polymer microfibers and nanofibers in woven fabrics, biocidal textiles, biosensors, membranes, filters, protein support and organ repairs. The methods typically include admixing a thermoplastic polymer and a matrix material to form a mixture, where the thermoplastic and the matrix are thermodynamically immiscible, followed by extruding the mixture under conditions sufficient to form a microfibrillar composite containing a plurality of the thermoplastic polymer microfibers and/or nanofibers embedded in the matrix material. The microfibers and/or nanofibers are isolated by removing the surrounding matrix. In one embodiment, the microfibrillar composite formed is further extended under conditions sufficient to form a drawn microfibrillar and/or nanofibrillar composite with controlled diameters.

Abstract: A method, MIMO communication device and electronic storage medium for mapping symbols during a duration of each plural consecutive frames of each of a plurality of first data streams (10, 12, 14, 16, 18, 20, 22, 24, 26) to frames of a plurality of second data streams (spaced-time coded streams or antenna streams); and varying the mapping during the duration of each of the plural consecutive frames of each of the plurality of first data streams (10, 12, 14, 16, 18, 20, 22, 24, 26).

Abstract: The present invention relates to methods for data processing, particularly seismic data represented in three dimensions (3D). A method in accordance with one embodiment of the invention includes identifying extrema points from the 3D seismic data set; removing artificial distortion from 3D seismic data set; generating extrema cubes and derivatives along extrema points; estimating a class number associated with the extrema points; and determining number of classes and dynamically classifying extrema points.

Abstract: Methods and systems for investigating subterranean formations are disclosed. A method for extracting geological horizon on-demand from a 3D seismic data set, comprises collecting 3D seismic data and generating 3D seismic extrema cubes; obtaining a user-defined seed point in the 3D seismic data set; determining a starting extrema point for extracting the geological horizon, wherein the starting extrema point is associated with the seed point; growing an extrema patch consisting of multiple extrema points from multiple traces, wherein the growth begins from the starting extrema point; capturing statistics of the growing extrema patch; and outputting the extrema patch as the geological horizon, including spatial and attribute statistics.

Abstract: Methods and apparatus for continuing wind turbine operation when normal wind turbine motor control is unavailable due to overheating of one or more wind turbine control motors. Technical effects of the present invention include providing an effective control strategy continuing operation during over-heating of a wind turbine control motor, such as a pitch control motor and a yaw control motor.

Abstract: A dual-band antenna includes a planar conductive layer comprising a conductive region and a central non-conductive region. The conductive region and the non-conductive region together define a pair of interconnected F-slot structures, and a loop strip structure coupled to and disposed around the F-slot patch slot antenna structures.

Abstract: An antenna assembly for a mobile wireless communication device has a support with a first surface and a second surface between which a third surface and a fourth surface extend. A conductive ground plane is formed on the second surface. An antenna includes an electrically conductive patch located on the first surface, and first and second electrically conductive legs and an electrically conductive stripe all abutting the patch. In one version the first and second legs and the strip are all on the third surface. In another version the first and second legs are on the third surface and the strip is on the fourth surface that is orthogonal to the third surface. A first signal port is adapted to apply a first signal to the first leg and a second signal port is adapted to apply a second signal to the third leg.

Abstract: The present invention discloses a method and system for establishing VoIP communication by means of digital video broadcasting network. The method comprises: a first terminal sending a VoIP call request to a source VoIP server to which the first terminal belongs, the VoIP call request containing an address of a second terminal; the source VoIP server forwarding the VoIP call request to a destination VoIP server to which the second terminal belongs; the first terminal or any one of VoIP servers in a forwarding path from the source VoIP server to the destination VoIP server forwarding the VoIP call request to a digital video broadcasting front-end server; the digital video broadcasting front-end server converting the VoIP call request into a call request modulated in digital video signals and broadcasting it within the digital video broadcasting network.