| Patent application number | Description | Published |
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| 20090046010 | SYSTEM AND METHOD FOR EFFICIENT TRANSMIT AND RECEIVE BEAMFORMING PROTOCOL WITH HETEROGENEOUS ANTENNA CONFIGURATION - A system and method of training antennas for two devices having heterogeneous antenna configurations in a wireless network is disclosed. The method includes communicating one or more estimation training sequences between two devices via a phased array antenna and a switched array antenna, wherein a beamforming vector of the phased array antenna is switched between phase vectors within a set of weight vectors while the switched array antenna is switched within a plurality of antenna sectors. The method further includes tuning at least one of the phase array and switched array antennas with an antenna parameter selected based at least in part on the one or more estimation training sequences. The method further includes communicating data messages via at least one of the phase array and switched array antennas so tuned. | 02-19-2009 |
| 20090046012 | SYSTEM AND METHOD FOR TRAINING THE SAME TYPE OF DIRECTIONAL ANTENNAS THAT ADAPTS THE TRAINING SEQUENCE LENGTH TO THE NUMBER OF ANTENNAS - Systems and methods of training antennas for two devices equipped with phased array antennas in a wireless network are disclosed. In one embodiment, the methods include transmitting a plurality of estimation training sequences from a transmit phased array antenna to a receive phased array antenna, wherein a length of at least one of the plurality of training sequences is adapted to a number of antenna elements at one of the transmit and receive phased array antennas. The methods further include transmitting data to the receive phased array antenna via the transmit phased array antenna tuned with a transmit beamforming vector (BV) selected based at least in part on the plurality of estimation training sequences. | 02-19-2009 |
| 20090046765 | SYSTEM AND METHOD FOR ACQUIRING BEAMFORMING VECTORS USING TRAINING SEQUENCES WITH ADAPTIVE SPREADING GAINS - A method and system for acquiring beamforming vectors using multiple spreading sequence spreading gains is disclosed. One embodiment of the invention allows time and power to be saved by spreading a training sequence with spreading sequences of different gains in different iterations of an iterative beamforming acquisition procedure. In one embodiment of the invention, the method comprises modulating, at a first station, a first training sequence with a first source beamforming vector, wherein the first training sequence has a first spreading gain, transmitting the modulated first training sequence to a second station, receiving a first response signal from the second station, obtaining a second source beamforming vector based on the first response signal, modulating, at the first station, a second training sequence with the second source beamforming vector, wherein the second training signal has a second spreading gain which is different from the first spreading gain, transmitting the modulated second training sequence to the second station, receiving a second response signal from the second station, obtaining a third source beamforming vector based on the second response signal, and determining whether to use the third source beamforming vector to modulate a data signal to be transmitted to the second station. | 02-19-2009 |
| 20090046798 | SYSTEM AND METHOD FOR ACQUIRING A TRAINING MATRIX FOR A BREAMFORMING ACQUISITION PROTOCOL USING A BUTSON MATRIX - A method and system for obtaining and transfer matrix and or acquiring beamforming vectors using a Butson matrix is disclosed. In one embodiment, the method includes i) determining the number (N) of transmitter antennas, ii) obtaining a unitary matrix having M rows and M columns, wherein M is an greater than or equal to N, and wherein the elements of the matrix are selected from the group consisting of: +1, −1, +j, and −j, iii) selecting N rows of the unitary matrix and iv) generating a training matrix having N rows and M columns based on the selected N rows. The method may further include obtaining a source beamforming vector using the training matrix. | 02-19-2009 |
| 20090047910 | SYSTEM AND METHOD FOR TRAINING DIFFERENT TYPES OF DIRECTIONAL ANTENNAS THAT ADAPTS THE TRAINING SEQUENCE LENGTH TO THE NUMBER OF ANTENNAS - A system and method of training antennas for two devices having different types of directional antennas in a wireless network is disclosed. The method includes transmitting a plurality of estimation training sequences from a transmit directional antenna to a receive directional antenna. The length of at least one of the plurality of training sequences is adapted to a number of antenna elements at one of the transmit and receive directional antennas. The method further includes transmitting data to the receiver via the transmit directional antenna tuned with an antenna parameter that is selected based at least in part on the plurality of estimation sequences. | 02-19-2009 |
| 20090077611 | SYSTEM AND METHOD FOR WIRELESS COMMUNICATION OF UNCOMPRESSED VIDEO HAVING REED-SOLOMON CODE ERROR CONCEALMENT - A system and method for wireless communication of uncompressed video data are disclosed. One embodiment of a method of wireless communication for video data includes concealing corrupted portions of video data. The method includes receiving a plurality of video packets transmitted over a wireless channel. Each of the video packets includes a plurality of data blocks, and the data blocks in the plurality of video packets together form video data representing at least part of a video frame. Each of the data blocks is encoded with an error correction code (ECC). The method also includes determining whether any of the plurality of data blocks in the video packets has been corrupted while being transmitted over the wireless channel; and replacing a corrupted data block with an uncorrupted data block selected from the plurality of data blocks in the plurality of video packets. The corrupted data block includes a first displayable element on the video frame and the uncorrupted data block includes a second displayable element on the video frame. The uncorrupted data block is selected at least partially based on proximity between the first and second displayable elements on the video frame. | 03-19-2009 |
| 20090231196 | MMWAVE WPAN COMMUNICATION SYSTEM WITH FAST ADAPTIVE BEAM TRACKING - Briefly, a mechanism to performing beam tracking during an exchange of data packets disclosed. A perturbation on a transmit or receive beamforming vector is added for the transmission or reception of each data packet. The perturbation may be a minimum allowed phase rotation. | 09-17-2009 |
| 20090232023 | Combined omni- and directional- communications in high-frequency wireless networks - In a wireless communication network, specific portions of the communication may combine directional transmission with omnidirectional reception. In particular, sector-level directional transmission may be established through sector sweeps, followed by antenna training for more directionality. In some embodiments, collisions during the exchange may be reduced by having different network devices use different sub-channels or different time slots. In some embodiments, each network may restrict its network communications to a single sub-channel that is different than the sub-channels used by adjacent networks. | 09-17-2009 |
| 20090233545 | BIDIRECTIONAL ITERATIVE BEAM FORMING - Bidirectional iterative beam forming techniques are described. An apparatus may include a wireless device having an antenna control module operative to initiate beam formation operations using an iterative training scheme to form a pair of communications channels for a wireless network, the antenna control module to communicate training signals and feedback information with a peer device via the transceiver and phased antenna array using partially or fully formed high rate channels, and iteratively determine antenna-array weight vectors for a directional transmit beam pattern for the phased antenna array using feedback information from the peer device. Other embodiments are described and claimed. | 09-17-2009 |
| 20090274233 | METHOD AND SYSTEM FOR PHASE TRACKING IN WIRELESS COMMUNICATION SYSTEMS - A method and system phase tracking in a wireless communication system is provided. Phase tracking involves receiving a first Orthogonal Frequency Division Multiplexing (OFDM) symbol and a second OFDM symbol which is a repetition of the first symbol, over a wireless channel, the symbols representing an incoming signal. A phase of the incoming signal is extracted by performing phase tracking across all subcarrier data tones and pilot tones of the symbols. | 11-05-2009 |
| 20100005355 | INTERFERENCE AVOIDANCE WITH SYNCHRONOUS HARQ AND PERSISTENT SCHEDULING - A method of avoiding periodic interference by permuting periodic transmissions by a base station (BS) may include transmitting a frame of data to a subscriber station (SS). The BS may check for an acknowledgement of the frame of data from the SS and may schedule a next frame of data for transmission or retransmission based on whether the acknowledgement was received from the SS. The scheduling may include permuting traffic within the next frame in time or in frequency relative to similar traffic in a prior frame according to a predetermined function. The BS may generate media access protocol (MAP) information for the next frame based on the permuting. | 01-07-2010 |
| 20100074347 | METHOD AND APPARATUS OF SUBCHANNELIZATION OF WIRELESS COMMUNICATION SYSTEM - A method and apparatus to transmit pilot subcarriers over uplink channels. The pilot subcarriers includes symbols which hierarchically structured. The symbol includes a first split of at least two fractional frequency reuse (FFR) groups, a second split of a fractional frequency reuse (FFR) group to a distributed resource group and localized resource group and a third split of said distributed resource group and localized resource group into plurality of subchannels. | 03-25-2010 |
| 20100162069 | Dynamic interference avoidance with asynchronous HARQ - In a wireless communications network, a wireless device may examine the received signal to determine the strength of the received signal, and also determine the level of interference and noise. If a retransmission is needed due to a message being incorrectly received, these factors may then be processed to estimate whether the probable cause of poor reception is interference from a neighboring network. If such interference is the likely cause, the retransmission may be changed to a different time and/or to different frequencies in a subsequent frame, so that the interference from the neighboring network is less likely to reoccur. | 06-24-2010 |
| 20100164802 | Arrangements for beam refinement in a wireless network - In some embodiments a beamforming method is disclosed. The method can include transmitting a beam having a channel defined by a maximum ration transmission vector (MRT) and receiving a first response from a receiver, where the first response has first information such as parameters related to the transmitted beam. Using the parameters and the initial MRT another directional transmission can be made. A similar process can determine a maximum combining ratio for a receiver. Set up communications between the transmitter and the receiver can be reduced by omitting data from transmission that can be acquired by other means such as from memory or calculations. Additional embodiments are also disclosed. | 07-01-2010 |
| 20100164805 | Arrangements for beam refinement in a wireless network - A beamforming method is disclosed that includes performing sequential beam transmissions in multiple directions and receiving replies to the transmissions (i.e. a sector search). The received transmissions can include information or channel parameters such as direction of arrival, signal to noise ratio, signal strength, etc., for each sector. Utilizing the parameters transmitted or fed back by the receiver, the transmitter can store control vectors that dictate a beam that can be utilized to commence a beam refinement procedure. In addition, the parameters can be utilized to select and implement a custom sequence to refine the communication channel between the device and the controller. The custom sequence can significantly reduce the time required to create a channel with acceptable qualities such that efficient high speed network communications can be conducted. Other embodiments are also disclosed. | 07-01-2010 |
| 20100169400 | PARTIALLY RANDOM PERMUTATION SEQUENCE GENERATOR - Embodiments of the present disclosure provide methods, systems, and apparatuses related to a partially random permutation sequence generator. Other embodiments may be described and claimed. | 07-01-2010 |
| 20100246696 | PILOT METHOD FOR 802.16M - A novel pilot method employs a cluster having a particular arrangement of pilot sub-carriers to optimize transmissions under 802.16m, or WiMAX-II. The optimally configured cluster features equal pilot density per OFDM symbol, two or more pilot sub-carriers per cluster, and interlaced pilot sub-carriers, which enables the base stations to successfully boost the pilot sub-carriers, for optimum performance. | 09-30-2010 |
| 20100322129 | Techniques for hierarchical encoding for multicast broadcast services in wireless communication systems - An embodiment of the present invention provides an apparatus, comprising a transceiver adapted for hierarchical encoding for a Multicast Broadcast Service (MBS) in wireless networks, wherein the hierarchical encoding is provided by superposition coding to provide different levels of protection for data streams. | 12-23-2010 |
| 20110002263 | BEAMFORMING USING BASE AND DIFFERENTIAL CODEBOOKS - Embodiments of methods and apparatus for determining and/or quantizing a beamforming matrix are disclosed. In some embodiments, the determining and/or quantizing of the beamforming matrix may include the use of a base codebook and a differential codebook. Additional variants and embodiments are also disclosed. | 01-06-2011 |
| 20110002280 | MIDAMBLE FOR WIRELESS NETWORKS - Briefly, in accordance with one or more embodiments, a midamble for a downlink subframe is generated by rotating an order of midamble tones per antenna between two or more subbands. A Golay sequence may be utilized in the modulation of one or more subcarriers of the midamble via a reuse-3 arrangement. Alternatively, a reuse-1 arrangement may be applied to the midamble. | 01-06-2011 |
| 20110004804 | Systems and methods for channel coding of wireless communication - Embodiments of an apparatus and method for coding of wireless transmissions channel are generally described herein. Other embodiments may be described and claimed. | 01-06-2011 |
| 20110045785 | BIDIRECTIONAL ITERATIVE BEAM FORMING - Bidirectional iterative beam forming techniques are described. An apparatus may include a wireless device having an antenna control module operative to initiate beam formation operations using an iterative training scheme to form a pair of communications channels for a wireless network, the antenna control module to communicate training signals and feedback information with a peer device via the transceiver and phased antenna array using partially or fully formed high rate channels, and iteratively determine antenna-array weight vectors for a directional transmit beam pattern for the phased antenna array using feedback information from the peer device. Other embodiments are described and claimed. | 02-24-2011 |
| 20110149758 | CHANNEL QUALITY INDEXING AND REVERSE INDEXING - Channel quality indexing and reverse indexing is described. In one example, a quality value for subbands of a radio communications system are measured. An index for each quality measurement is then determined and a combinatorial index is generated to reflect the indices and the selected subbands. The combinatorial index is then sent to a radio station using a radio communications channel. | 06-23-2011 |
| 20110158337 | OFDM TRANSMITTER AND METHODS FOR REDUCING THE EFFECTS OF SEVERE INTERFERENCE WITH SYMBOL LOADING - Embodiments of an OFDM transmitter and method of reducing the effects of interference on subcarriers in an OFDM system by symbol loading are disclosed herein. A linear transformation is performed on a group of two or more input data symbols that are mapped to different signal dimensions to generate a corresponding two or more output data symbols. Each of the output data symbols has an increased number of constellation points. Each output data symbol is configured for transmission within one of the different signal dimensions. The linear transformation is configured so that each of the two or more output data symbols carry the information of each of the input data symbols of the group. This coding together of input data symbols that are mapped to different signal dimensions may provide improved reliability against fading and severe interference. The different signal dimensions may comprise a frequency, a time and/or a space dimension. | 06-30-2011 |
