Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 8179864 | Method of controlling a communications link The present invention is directed to a method of controlling a communications link and apparatus configured to perform this method. This invention is particularly related to but in no way limited to MIMO (multiple inputs multiple outputs) wireless communications sys... | 05/15/2012 |
| 8165097 | Transmission method of mobile station for random access channel diversity A transmission method performed by a mobile station for random access channel (RACH) burst transmission diversity gain is provided. According to the method, by combining and using switching diversity by beam forming, frequency hopping, and power ramping, the probabi... | 04/24/2012 |
| 8160028 | Spatial puncturing apparatus, method, and system Stations in a N×N multiple-input-multiple-output (MIMO) wireless network always puncture the weakest spatial channel. N−1 spatial channels are always used regardless of the channel state. ... | 04/17/2012 |
| 8149791 | MIMO beamforming method and method of constructing a differential codebook for a wireless network A MIMO beamforming method comprises receiving at a base station information regarding a difference between an ideal beamforming matrix and an averaged beamforming direction, using the information to construct a beamforming matrix at the base station, and performing ... | 04/03/2012 |
| 8144666 | Downlink beamforming for broadband wireless networks Spatial Division Multiple Access (SDMA) offers multiplicative spectral efficiency gains in wireless networks. An adaptive SDMA beamforming technique is capable of increasing the traffic throughput of a sector, as compared to a conventional tri-cellular arrangement, ... | 03/27/2012 |
| 8139544 | Pilot tone processing systems and methods Embodiments of pilot tone processing systems and methods are disclosed. In one embodiment, among others, a pilot tone processing system comprises pilot tone logic configured to receive first pilot tone data corresponding to a first transmit antenna and second pilot ... | 03/20/2012 |
| 8125963 | Radio transmission control method, radio receiver apparatus, and radio transmitter apparatus A radio communication method and apparatus generate a plurality of information signals and transmit the signals to a communication partner from a plurality of antennas. A plurality of combination of signals to be transmitted are selected. A transmission evaluation v... | 02/28/2012 |
| 8111667 | Wireless transceiver In a MIMO wireless transceiver, priority control that judges priority of transmit data and a transmission mode table are provided to control an option as to which transmission system SDM or STBC is selected, coding rate and modulation method based on a transmission ... | 02/07/2012 |
| 8098632 | Apparatus and method for downlink scheduling in a SDMA-enabled OFDMA wireless network A scheduler for scheduling downlink transmissions of orthogonal frequency division multiple access (OFDMA) signals using spatially directed beams to a plurality of subscriber stations in a wireless network. The scheduler schedules the downlink transmissions as a fun... | 01/17/2012 |
| 8094625 | Resource allocation for MIMO-OFDM communication systems Techniques to schedule terminals for data transmission on the downlink and/or uplink in a MIMO-OFDM system based on the spatial and/or frequency “signatures” of the terminals. A scheduler forms one or more sets of terminals for possible (downlink or uplink) data... | 01/10/2012 |
| 8085734 | System and method for dynamic receive diversity allocation A system and method for dynamic receive diversity allocation. A communications device comprises a first physical layer (PHY) unit, a second PHY unit, a first signal path coupled to a first antenna and to the first PHY unit, a switchable signal path coupled to a seco... | 12/27/2011 |
| 8077678 | Radio resource allocating method and apparatus in adaptive antenna system A radio resource allocating method in an adaptive antenna system is provided. The radio resource allocating method includes selecting one user when there are one or more users allocable to a current spatial frame; calculating a sum of Modulation order Product code R... | 12/13/2011 |
| 8072941 | Method and apparatus of system scheduler Briefly, according to embodiments of the invention, there is provided a wireless communication system and a method to receive by a base station from a first mobile station a first chain of data symbols transmitted by at least two antennas and having a first transmit... | 12/06/2011 |
| 8068462 | Method and apparatus for retransmitting data based on antenna scheduling in MIMO system Provided is a method for retransmitting data based on antenna scheduling in a MIMO system to which a spatial multiplexing technique is applied. The method includes the steps of: (a) at a transmitter side, modulating an input packet into transmittable data to transmi... | 11/29/2011 |
| 8068463 | Systems and methods for multi-beam optic-wireless vehicle communications The present invention offers systems and methods for effective multiple-hop routing, multicasting and media access control for vehicle group communications that employ directional wireless radio technology. Multi-beam optic-wireless media and streamlined operations ... | 11/29/2011 |
| 8064408 | Beamforming devices and methods Devices and methods are provided for directionally receiving and/or transmitting acoustic waves and/or radio waves for use in applications such as wireless communications systems and/or radar. High directional gain and spatial selectivity are achieved while employin... | 11/22/2011 |
| 8064407 | Method and equipment for realizing smart antenna in WCDMA system A method and device for realizing smart antenna in WCDMA system are disclosed in the invention, including array antenna, radio frequency channel module, beam forming module, channel environment detection and classification module, beam-forming algorithm selection an... | 11/22/2011 |
| 8059611 | Maintaining a constant transmission power density of a data signal utilizing prohibited subcarriers A base station apparatus is used in a mobile communication system that uses an OFDM scheme in a downlink. The base station apparatus includes: a unit configured to perform inverse Fourier transform on a signal in which a first signal and a second signal is mapped to... | 11/15/2011 |
| 8059610 | Method and apparatus for implementing H-ARQ in a MIMO wireless communication system A method and apparatus for implementing hybrid automatic repeat request (H-ARQ) in a multiple-input multiple-output (MIMO) wireless communication system are disclosed. A transmitter transmits at least two data packets via two or more antennas. If at least one of the... | 11/15/2011 |
| 8059607 | Methods and systems for implementing transmit diversity over a wireless medium and networks using the same A spatial transmit diversity method includes transmitting data at a selected rate from a first antenna and awaiting an acknowledgement indicating successful receipt by the receiving terminal of the data transmitted at the selected rate from the first antenna. The da... | 11/15/2011 |
| 8059608 | Transmit spatial diversity for cellular single frequency networks Multiple-In Multiple-Out (MIMO) techniques are used to increase spectral efficiency of a cellular single frequency network. In some embodiments with single transmit antenna per cell, multiple data streams are transmitted from multiple cells, one data stream per set ... | 11/15/2011 |
| 8059609 | Resource allocation to support single-user and multi-user MIMO transmission Techniques for supporting MIMO transmission are described. Users are classified into a first group of users to be scheduled individually for MIMO transmission and a second group of users that can be scheduled together for MIMO transmission. Transmission resources ar... | 11/15/2011 |
| 8054809 | Retransmission method for multiple antenna system A packet retransmission method for use in a communication system transmitting a signal via at least two antennas is disclosed. The packet retransmission method includes the steps of: a) receiving a signal corresponding to a specific packet, and independently transmi... | 11/08/2011 |
| 8045528 | Feedback method for performing a feedback by using a codebook in MIMO system A feedback method for performing a feedback by using a codebook in Multiple Input Multiple Output (MIMO) system includes receiving, by the mobile station, a MIMO mode type information, generating feedback information by using the codebook selected according to the M... | 10/25/2011 |
| 8040854 | OFDM wireless communication method and wireless communication apparatus In a wireless communication system wherein at least two communication units employ the TDD wireless communication method based on OFDMA, an OFDM wireless communication method and a wireless communication apparatus are disclosed. The first communication unit transmit... | 10/18/2011 |
| 8031678 | Simplified practical rank and mechanism, and associated method, to adapt MIMO modulation in a multi-carrier system with feedback A method of adapting transmission parameters in a multicarrier communication system having multiple transmit antennas and/or multiple receive antennas, whereby a statistical parameter of a wideband channel is computed, one type of matrix modulation scheme is selecte... | 10/04/2011 |
| 8031679 | Method for performing softer handover in a broadband wireless communication system Disclosed is a method of performing softer handover in a broadband wireless communication system. The method includes granting identification numbers to neighbor antennas around a mobile station currently performing communication, and transmitting a neighbor base st... | 10/04/2011 |
| 8027315 | Antenna diversity The invention is directed to a method of communicating between a first transceiver including a plurality of antennas and a second transceiver, the method comprising the steps of: transmitting a signal from the first transceiver to said second transceiver using each ... | 09/27/2011 |
| 8018903 | Closed-loop transmit diversity scheme in frequency selective multipath channels Closed loop multiple-antenna wireless communications system with antenna weights determined by maximizing a composite channel signal-to-interference-plus-noise ratio minimum. Multiplexed symbol streams over subsets of antennas enhance throughput. ... | 09/13/2011 |
| 8018904 | Antenna selection method Embodiments of the invention provide a method and apparatus for initiating a telecommunications uplink from a mobile terminal to a telecommunications network. A preamble signal is transmitted from the mobile terminal to the network in accordance with a transmission ... | 09/13/2011 |
| 8000301 | Wireless communication system, and apparatus and method for wireless communication An embodiment of the invention provides a wireless communication system for carrying out a spatial multiplexing communication between a transmitter, and a receiver, the system including: a channel information matrix acquiring section for acquiring a channel informat... | 08/16/2011 |
| 7995537 | Method and system for channel estimation in a spatial multiplexing MIMO system Aspects of a method and system for channel estimation in a SM MIMO communication system may comprise receiving a plurality of spatially multiplexed communication signals from a plurality of transmit antennas. A plurality of baseband combined channel estimates based ... | 08/09/2011 |
| 7995536 | Multi-input multi-output (MIMO) for wireless transmitting and receiving stations A wireless terminal receives a signal from a first BTS as a communication party and a signal from a second BTS when receiving the signal from the first BTS by using a communication slot that is assigned to the terminal, the terminal comprises receiving antennas; a d... | 08/09/2011 |
| 7978661 | Multi-carrier communication device and multi-carrier communication method There is provided a multi-carrier communication method capable of preventing lowering of a throughput of another mobile device accompanying allocation of a sub-carrier for a new mobile station device. This multi-carrier communication method can acquire reception qua... | 07/12/2011 |
| 7978660 | Base station, mobile terminal, and communications method A base station, to which Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiple Access is applied, communicates with a mobile terminal according to Time Division Duplex, in which a transmission frame includes a downlink subframe and an upl... | 07/12/2011 |
| 7978659 | Method and apparatus of connectivity recovery in a wireless network A wireless communication device and a method of operating an antenna training process to discover first and second communication paths between at least two stations, to rank according to a quality criterion transmitting and receiving modes of an antenna, to report b... | 07/12/2011 |
| 7974244 | Method and system for reducing uplink noise in wireless communication systems A method and system for reducing the overall noise floor in a wireless communication system, subsystem or network are disclosed, which reduces the output gain levels of specific uplink antenna transmitters during non-signal time periods (e.g., rest mode) when no com... | 07/05/2011 |
| 7974243 | Wireless packet communication method and wireless packet communication apparatus In retransmission processing due to a failure of transmission of data packets, a plurality of data packets are simultaneously transmitted between two STAs by utilizing multiple wireless channels and MIMO, and the number of idle channels and the number of retransmiss... | 07/05/2011 |
| 7965687 | Method and system for multiple-input-multiple-output (MIMO) communication in a wireless network A method and a system for Multiple-Input-Multiple-Output (MIMO) communication in a wireless network are provided. According to the method, streams of the data of a user-equipment are communicated to a group of user-equipments that act as antennas for the user-equipm... | 06/21/2011 |
| 7957351 | Method and apparatus for management of multi-carrier communications in a wireless communication system A method and apparatus manages resources in a wireless communication system by transmitting a multi-carrier switch command message to an access terminal instructing the access terminal to switch between a diversity mode where each antenna module of a plurality anten... | 06/07/2011 |
