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US20130107977 MULTI-RESOLUTION BEAMFORMING BASED ON CODEBOOKS IN MIMO SYSTEMS  
Certain aspects of the present disclosure relate to methods for beamforming that achieve beamforming optimality criterions. Some proposed beamforming techniques are based on antenna directions...
US20150016557 METHOD AND SYSTEM FOR A LOW-COMPLEXITY SOFT-OUTPUT MIMO DETECTION  
An approach for Soft-output K-Best MIMO detection comprises computing an estimated symbol vector and Log-Likelihood Ratio (LLR) values for transmitted bits. The approach includes a relevant...
US20150098516 METHOD FOR DETERMINING PRECODING MATRIX INDICATOR, USER EQUIPMENT, AND BASE STATION EVOLVED NODEB  
The present invention relates to a method for determining a precoding matrix indicator, a user equipment UE, a base station eNB, and a system. The method includes: receiving a reference signal...
US20130077704 JOINT CODING METHOD BASED ON BINARY TREE AND CODER  
The present invention provides a method and a coder for jointly coding Pre-coding Matrix Index #1 (W1) and Rank Index (RI) for channel state information feedback of a double codebook precoding...
US20150163073 MASSIVE MIMO CHANNEL ESTIMATION  
In an embodiment, a method of channel estimation is provided. The method includes determining a parametric model for a channel between a first transceiver and a second transceiver and transmitting...
US20130128999 MIMO CODEBOOK GENERATION  
Particular codebook entries used for a MIMO system of a lower dimension (i.e., having a relatively low number of antennas) can be used to generate a codebook for a MIMO system of a higher...
US20120033756 Multi-User Downlink Linear MIMO Precoding System  
Multi-user (MU-) MIMO systems with quantized feedback are designed to maximize the sum-rate via scheduling and linear precoding. To maximize throughput over the network, quantized CSIT is sent...
US20140177749 METHOD OF DESIGNING CODEBOOK FOR 3D ANTENNA CONFIGURATION  
The invention relates to a method of designing a codebook for a 3D antenna configuration, the method including the steps of: selecting a first codeword characterizing a first antenna array in the...
US20120300867 MODEL-BASED CHANNEL ESTIMATOR FOR CORRELATED FADING CHANNELS AND CHANNEL ESTIMATION METHOD THEREOF  
A model-based channel estimator for correlated fading channels adapted to a multiple-input multiple-output (MIMO) system, estimates a coefficient vector of a channel matrix for a given angle of...
US20100316002 MULTIBAND ANTENNA FOR COOPERATIVE MIMO  
Certain aspects provide a method for reducing interference in a cooperative MIMO system.
US20150110212 WIRELESS SYSTEM WITH CONFIGURABLE RADIO AND ANTENNA RESOURCES  
A wireless access device, system and method are disclosed for provisioning multiple concurrent radio services and adaptive management of multi-radio access points or multi-radio small cell base...
US20130259149 MULTI-USER COMMUNICATION USING SPARSE SPACE CODES  
Multi-user sparse space codes are proposed as a new transmission scheme for uplink communication over a multi-user multiple-input-multiple-output (MIMO) communication channel.
US20150200718 TECHNIQUES FOR BEAMFORMING TO MITIGATE MULTI-USER LEAKAGE AND INTERFERENCE  
Examples are disclosed for beamforming to mitigate multi-user leakage and interference. The examples include an evolved node B (eNB) receiving feedback from user equipment (UEs) to indicate...
US20150030092 METHODS AND A DEVICE FOR MULTI-RESOLUTION PRECODING MATRIX INDICATOR FEEDBACK  
Disclosed are methods and a device for Multi-resolution PMI Feedback. In one implementation, a user equipment finds a rank 1 or rank 2 Precoding Matrix Indicator based on the signal channel matrix...
US20150215015 MULTI-RANK PRECODING MATRIX INDICATOR (PMI) FEEDBACK IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) SYSTEM  
In at least some embodiments, a system includes a multiple-input multiple-output (MIMO) base station and a plurality of MIMO user equipment (UE) devices in communication with the MIMO base...
US20120224650 System and Method for Uplink Inter Cell Interference Coordination in a Wireless Access System  
A system and method for uplink inter cell interference coordination and multi-user multiple input, multiple output in a wireless access system are provided. A method for providing uplink inter...
US20150171949 USER EQUIPMENT AND METHOD FOR PRECODING FOR MIMO CODEBOOK-BASED BEAMFORMING USING AN AUTOCORRELATION MATRIX FOR REDUCED QUANTIZATION NOISE  
Embodiments of user equipment (UE) and methods for precoding for codebook based beamforming are generally described herein In some embodiments, an autocorrelation matrix is used to derive weight...
US20150236769 CLOSED-LOOP MULTIPLE-INPUT-MULTIPLE-OUTPUT SCHEME FOR WIRELESS COMMUNICATION BASED ON HIERARCHICAL FEEDBACK  
The present invention provides methods implemented in a base station having a plurality of antennas and one or more user terminals. One embodiment of the method includes receiving feedback from at...
US20110211647 CLOSED-LOOP MULTIPLE-INPUT-MULTIPLE-OUTPUT SCHEME FOR WIRELESS COMMUNICATION BASED ON HIERARCHICAL FEEDBACK  
The present invention provides methods implemented in a base station having a plurality of antennas and one or more user terminals. One embodiment of the method includes receiving feedback from at...
US20140355705 USER EQUIPMENT AND METHODS FOR CODEBOOK SUBSAMPLING FOR ENHANCED 4TX CODEBOOKS  
Embodiments of user equipment (UE) and methods for codebook subsampling for enhanced 4TX codebooks in 3GPP LTE wireless networks are generally described herein. In some embodiments, a physical...
US20110002412 METHOD FOR DETERMINING DEMODULATION REFERENCE SIGNAL IN THE UPLINK, UE AND UPLINK SYSTEM  
The present invention discloses a method for determining an uplink demodulation reference signal (DMRS), which includes: taking one of multiple transmit antennas in the uplink as a base transmit...
US20140029685 PREAMBLE EXTENSIONS  
Systems and/or methods for communication that generate a plurality of spatial streams are disclosed. Each of the spatial streams comprises a plurality of symbols. At least a portion of a training...
US20120170676 Robust Linear Precoder Designs for Multi-Cell Downlink Transmission  
Methods and systems for optimizing the utilities of receiver devices in a wireless communication network are disclosed. Precoder design formulations that maximize a minimum worst-case rate or a...
US20130058424 Codebook Design and Structure for Multi-Granular Feedback  
A first precoding matrix W1 is selected from a first codebook comprising sets of rank specific precoding matrices. The first codebook is characterized by there being fewer precoding matrices...
US20140233667 METHOD AND APPARATUS FOR SUPPORTING MANAGEMENT ACTIONS FOR VERY HIGH THROUGHPUT IN WIRELESS COMMUNICATIONS  
A method and apparatus may be used in Very High Throughput (VHT) Wireless Local Area Network (WLAN) management actions. Management action frames such as VHT Action frames may be used to implement...
US20070183533 MIMO system with spatial diversity  
A method of transmitting a wireless signal (FIGS. 2 and 3A) is disclosed. A data stream (DATA) is received at a first transmitter (210). The data stream is also received by a second transmitter...
US20150010099 ANTENNA SELECTION ADJUSTMENT  
Dynamic adjustment of antenna selection period at a wireless communication device or user equipment having two or more antennas. The described approaches consider an antenna selection performance...
US20140064394 USER EQUIPMENT, BASE STATION AND METHOD FOR SELECTING REMOTE RADIO HEAD  
The present invention relates to a User Equipment (UE), a base station and a method for selecting a Remote Radio Head (RRH). A UE, including: a storage unit configured to store a code book...
US20110064158 DIFFERENTIAL FEEDBACK SCHEME FOR CLOSED-LOOP MIMO BEAMFORMING  
A first N×M codebook of a first rank M may be used to generate a second N×(N−M) codebook of a second rank (N−M). This second codebook is both orthogonal and complementary to the first codebook. In...
US20110261774 Uplink Control Signaling in Cellular Telecommunication System  
A method, apparatus, and computer program for controlling allocation of control message fields in uplink transmission in a cellular telecommunication system are presented. Uplink control message...
US20110051832 METHODS FOR DETERMINING RECONSTRUCTION WEIGHTS IN A MIMO SYSTEM WITH SUCCESSIVE INTERFERENCE CANCELLATION  
Certain aspects provide a method for determining decoding order and reconstruction weights for decoded streams to be cancelled in a MIMO system with successive interference cancellation, based on...
US20120201321 CHANNEL FEEDBACK TO SUPPORT EFFICIENT RANK OVERRIDE  
A method can include providing channel feedback to support efficient rank override For example, in such a method, a rank−r precoder index corresponding to a rank−r precoder is determined, and...
US20120087430 SYSTEMS AND METHODS TO EXPLOIT AREAS OF COHERENCE IN WIRELESS SYSTEMS  
Non-linear or linear precoding is used to create separate areas of coherence to different users. Limited feedback techniques may also be employed to send channel state information (CSI) from the...
US20150180561 Spatial Null Creation Using Massive MIMO (M-MIMO)  
In a base station having a Massive Multiple Input Multiple Output (M-MIMO) antenna array, the availability of the M-MIMO antenna array is exploited to manage the interference caused by the base...
US20150085945 Systems and Methods for OFDM Channelization  
Systems and methods for OFDM channelization are provided that allow for the coexistence of sub-band channels and diversity channels. Methods of defining diversity sub-channels and sub-band...
US20120236955 WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD  
A wireless communication system 1 performs MIMO communication between a wireless base station 10 with a plurality of antennas 14 and a mobile terminal 20 with a plurality of antennas 24. A...
US20150110215 METHOD, USER EQUIPMENT AND BASE STATION FOR DETERMINING PRECODING MATRIX INDICATOR  
The present disclosure discloses a method, a user equipment and a base station for determining a PMI. The method includes: receiving a reference signal set sent by a base station; based on the...
US20150055725 Pilot Design for Wireless System  
The description herein relates to pilot designs for an Orthogonal Frequency Division Multiplexing (OFDM) based communication system. In at least one embodiment, the communication system is one...
US20110103504 System and Method for User Specific Antenna Down Tilt in Wireless Cellular Networks  
Systems and methods for user specific antenna down tilt in wireless cellular networks are disclosed. A preferred embodiment method comprises synthesizing a plurality of virtual antennas from a...
US20140226746 METHOD AND APPARATUS FOR REPORTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM  
The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for reporting channel state information. A method in which a terminal reports...
US20120082190 PMI FEEDBACK WITH CODEBOOK INTERPOLATION  
Various embodiments of this disclosure may describe apparatuses, methods, and systems for interpolation of precoding matrixes to increase feedback accuracy of the channel state information (CSI)...
US20150236767 METHOD FOR IMPROVING TRANSMISSION CAPACITY IN A DL MU-MIMO COMMUNICATIONS SYSTEM  
A method according to the present invention is for selecting User Equipment (UE) for scheduling/precoding within the coverage area of a communications node having a predefined codebook. The method...
US20120002743 Statistical Joint Precoding in Multi-Cell, Multi-User MIMO  
A network node jointly precodes multi-user (MU) multiple-input multiple-output (MIMO) transmissions simultaneously sent from geographically distributed base stations to a plurality of mobile...
US20140341311 Unitary precoding based on randomized FFT matrices  
Systems and methodologies are described that facilitate constructing unitary matrices that may be utilized in linear precoding for multiple-input multiple-output (MIMO) wireless communication...
US20140247894 Unitary precoding based on randomized FFT matrices  
Systems and methodologies are described that facilitate constructing unitary matrices that may be utilized in linear precoding for multiple-input multiple-output (MIMO) wireless communication...
US20130308714 CODEBOOK AND FEEDBACK DESIGN FOR HIGH ORDER MIMO  
Aspects of the present disclosure relate to techniques that may be utilized in networks with base stations and/or mobile devices that use large number of antennas or multi-dimensional arrays of...
US20060050811 Shared frequency transmitter  
A shared frequency transmitter for use in a network environment where transmitters and receivers of plural radio communication systems in which the same frequency is used exist is disclosed. The...
US20120163486 Method of Selecting Antennas in a Wireless Communicating Network for High Reliability and Low Latency  
A network includes a transmitter and a receiver, wherein the transmitter includes a set of transmit antennas and the receiver includes a set of receive antennas. The transmitter duplicates a...
US20110299619 Methods and Apparatus for Overlapping MIMO Antenna Physical Sectors  
A system for communicating with wireless devices. The systems includes radio groups whose MIMO physical sectors overlap. The MIMO physical sectors communicate using different channels. The MIMO...
US20150222334 Monotonic Optimization Method for Achieving the Maximum Weighted Sum-Rate in Multicell Downlink MISO Systems  
A monotonic optimization method is for achieving the maximum weighted sum-rate in multicell downlink MISO systems. It belongs to the wireless communications field. The weighted sum-rate...