Abstract: A method and apparatus is disclosed herein for performing wireless communication.

Abstract: A system, a method and an apparatus are disclosed herein for receiver terminal driven joint encoder and decoder mode adaptation for SU-MIMO transmission. In one embodiment, the system comprises a transmitter that is able to be directed to transmit wireless signals over a multiple-input, multiple output (MIMO) system using any of a plurality of encoding modes; and a user terminal having a receiver comprising a decoding module which has a plurality of decoding modes, each of which can be used to decode communications from the transmitter received over a multiple-input, multiple output (MIMO) channel, wherein at least one encoding mode is operable with multiple of the decoding modes.

Abstract: A method and apparatus is disclosed herein for performing wireless communication.

Abstract: A method and apparatus is disclosed herein for scheduling over ODFM via interference alignment based on multipath intensity profile information. In one embodiment, the method comprises grouping user terminals into groups based on their multipath intensity profiles, where at least one of the groups has two or more terminals; scheduling user terminal groups for MU-MIMO transmission; allocating OFDM resources to the user terminal groups for MIMO transmission; assigning MU-MIMO transmission codes to the user terminal groups; and performing MU-MIMO transmission of the user terminal groups using assigned MU-MIMO transmission codes.

Abstract: A method and apparatus is disclosed herein for performing wireless communication.

Abstract: A wireless communication system, method and base station for using a multi-user MIMO (MU-MIMO)-based blind interference alignment (BIA) scheme are described. In one embodiment, the wireless communication system comprises a plurality of terminals, wherein each terminal in the plurality has a single radio frequency (RF) chain that is operable in M antenna modes, where M is an integer, and further wherein each terminal shifts between the M antenna modes in a predetermined manner.

Abstract: Methods, architectures and techniques of operating a joint beam-forming and user-selection system across multiple cells for downlink communication in a multi-cell environment. The system coordinates beamforming vector and user selection across multiple cells, but is cellular in the sense that users are served only from the transmission signals originating from one cell. There is provided methods, architectures and techniques to control the level and effect of inter-cell interference through a partially coordinated multi-cell process of user scheduling and beam selection based on the division of cells into different subsets. Multi-step techniques are utilized that can scale to large numbers of cells, specifying which operations remain as independent operations within a cell, and which operations, with what cells, require information exchange.

Abstract: A method and apparatus is disclosed herein for performing wireless communication.

Abstract: A method and system are disclosed herein for power allocation and/or clustering in a wireless communication system that uses blind interference alignment. In one embodiment, the system comprises a plurality of receivers, where each receiver in the plurality has a multi-mode antenna with a single radio frequency (RF) chain that is operable in a plurality of antenna modes, and wherein each receiver shifts between the plurality of antenna modes in a predetermined manner. The system also includes a plurality of base stations to perform cluster-based transmission, each base station in the plurality of base stations having one or more transmitters having a transmit antenna and being operable to communicate with one or more of receivers in the plurality of receivers using a blind interference alignment (BIA) scheme, and wherein the plurality of base stations are grouped in different clusters at different times according to cluster patterns.

Abstract: A system, a method and an apparatus are disclosed herein for receiver terminal driven joint encoder and decoder mode adaptation for SU-MIMO transmission. In one embodiment, the system comprises a transmitter that is able to be directed to transmit wireless signals over a multiple-input, multiple output (MIMO) system using any of a plurality of encoding modes; and a user terminal having a receiver comprising a decoding module which has a plurality of decoding modes, each of which can be used to decode communications from the transmitter received over a multiple-input, multiple output (MIMO) channel, wherein at least one encoding mode is operable with multiple of the decoding modes.

Abstract: A method and apparatus is disclosed herein for performing wireless communication.

Abstract: Methods, architectures and techniques of operating a joint beam-forming and user-selection system across multiple cells for downlink communication in a multi-cell environment. The system coordinates beamforming vector and user selection across multiple cells, but is cellular in the sense that users are served only from the transmission signals originating from one cell. There is provided methods, architectures and techniques to control the level and effect of inter-cell interference through a partially coordinated multi-cell process of user scheduling and beam selection based on the division of cells into different subsets. Multi-step techniques are utilized that can scale to large numbers of cells, specifying which operations remain as independent operations within a cell, and which operations, with what cells, require information exchange.

Abstract: In a system for simulcasting digitally modulated and analog FM signals over the same FM frequency band, the effect of the analog FM signal on the digitally modulated signal in the simulcast is calculated and canceled from the latter signal before its transmission. As a result, the digital transmission is free from interference from the analog FM signal. Moreover, the digital transmission is designed in such a manner that the interference caused thereby to the analog FM signal is kept at a minimal level.

Abstract: In a system for simulcasting a digitally modulated signal and an analog FM signal over the same FM frequency band, the composite signal is received and applied to a conventional FM receiver, and a digital receiver in accordance with the invention. An extended Kalman filter is employed in the digital receiver to estimate the analog FM signal based on a version of the recovered FM signal from the FM receiver, and a discrete version of the composite signal whose spectrum has been translated and is at an intermediate carrier frequency. The estimated FM signal, which is in a discrete form, is subtracted from the discrete version of the composite signal. The resulting signal, which is an estimated version of the digitally modulated signal, is demodulated to recover the digital data as transmitted.

Abstract: A method and system for reducing co-channel interference (CCI) in multiple access communication by providing complete or partial cancellation of a mixed CCI interfering signal in a system base station. An exemplary system includes first and second base stations communicating with users in first and second cells, respectively. The first base station transmits a downlink signal to a user in the first cell. The downlink signal is also a mixed CCI interfering signal in that it interferes with reception of an uplink signal in the second base station. A cancellation signal representative of the interfering signal is supplied along a transmission path from the first base station to the second base station. The second base station utilizes the cancellation signal to reduce the effect of the interfering signal on a received composite signal by, for example, combining the cancellation signal or a suitably processed version thereof with the received composite signal.

Abstract: An apparatus and method for reducing the runlength of dropped packets in multiple access cellular communication systems. The invention is particularly well suited for use in time-division multiple access (TDMA) systems such as, for example, shared time-division duplexing (STDD) systems, and TDMA/TDD systems with speech activity detection (SAD). Frame time or frequency slots for communicating information are allocated to a first set of active users. A second set of active users which are not allocated a slot in a given frame are identified. At least one of the users in the second set which remains active in a subsequent frame is provided with a priority in obtaining an allocated slot in the subsequent frame. In one embodiment, the slots allocated to particular active users in the given frame are shifted by at least one slot position if the same users are allocated slots in the subsequent frame.

Abstract: An apparatus and method for reducing co-channel interference in multiple-access cellular communication systems in which frame time or frequency slots are allocated between uplink and downlink. An omnidirectional antenna or a set of directional antennas are used in each cell base station to communicate with users. The frame slots in which the antennas communicate uplink and downlink information are arranged in accordance with a predetermined frame organization to reduce mixed co-channel interference (CCI). Mixed CCI occurs when a downlink transmission from one base station antenna in a given cell interferes with uplink reception in another base station antenna in a frequency reuse (FR) cell. A potentially-interfering antenna in a given cell is therefore directed to transmit downlink information in a different portion of the frame than that in which a potentially-interfered-with antenna in the frequency reuse cell receives uplink information.