Qualcomm Incorporated

Xcom Labs, Inc.

Peter J Black

Nagabhushana T Sindhushayana

Matthew Stuart Grob

Roberto Padovani

Mehmet Yavuz

Qiang Wu

Naga Bhushan

Rashid Ahmed Attar

Paul E Bender

Michael Mingxi Fan

Jurg K Hinderling

Tamer Adel Kadous

Charles E Wheatley, Iii

Eduardo A S Esteves

Sanjiv Nanda

Wanlun Zhao

Jun Ma

Rashid Ahmed Akbar Attar

Christopher G Lott

Ramin Rezaiifar

Mingxi Fan

Fuyun Ling

Yu-Cheun Jou

Srikant Jayaraman

Jinghu Chen

Juan Montojo

Parag Arun Agashe

June Namgoong

Rajiv Vijayan

Rohit Kapoor

Yeliz Tokgoz

Serafin Diaz Spindola

Paul Eric Jacobs

Mehmet Izzet Gurelli

Rashid Ahmed A Attar

Hao Xu

Raghu Narayan Challa

Donna Ghosh

Kenneth David Easton

David Ngar Ching Tse

Yongbin Wei

Ayman Fawzy Naguib

Ahmad Jalali

Dan Vassilovski

Gene Wesley Marsh

Pranav Dayal

Gadi Karmi

Je Woo Kim

Rajesh K Pankaj

Michael Alexander Howard

Thunyachate Ekvetchavit

Eduardo Esteves

Jing Jiang

Stephen William Edge

Henry S Chang

Edward George Tiedemann, Jr

John Edward Smee

Lindsay A Weaver, Jr

Jack M Holtzman

Serguei A Glazko

James A Hutchison, Iv

Abhay Arvind Joshi

Way-Shing Lee

Ruoheng Liu

Simon Turner

Joseph Binamira Soriaga

Krishna Kiran Mukkavilli

Jelena Damnjanovic

Alexei Yurievitch Gorokhov

Gabi Sarkis

Aamod Dinkar Khandekar

Avneesh Agrawal

Sumeeth Nagaraja

David Jonathan Julian

Siddhartha Mallik

Gwendolyn Denise Barriac

Ahmed Kamel Sadek

Jilei Hou

Dhananjay Ashok Gore

Danlu Zhang

Jia Tang

Bibhu P Mohanty

Raghuraman Krishnamoorthi

Michael Lee McCloud

Ying Wang

J Rodney Walton

Roberto Rimini

Jun Shi

Allen Minh-Triet Tran

Etienne Francois Chaponniere

Jeremy M Stein

Amal Ekbal

Noam A Ziv

Charles Edward Wheatley

Jiming Guo

Michael John Mangan

Dario Fertonani

Yin Huang

Peyman Razaghi

James T Determan

Aspects of this disclosure relate to user equipment assisted multiple-input multiple-output (MIMO) downlink configuration. Features are described for a user equipment determination of a desired transmission mode and/or active set of serving nodes for wireless communication service(s). The user equipment may submit a request for the desired mode and/or nodes to a network controller such as a baseband unit. The user equipment may subsequently receive a configuration for the requested wireless communication service(s).

Methods and systems for determining downlink data mode

Aspects of this disclosure relate to reference signal channel estimation. A wireless communication channel between two nodes can be estimated based on a received reference signal, such as a Sounding Reference Signal. Techniques are disclosed to improve performance of reference signal channel estimation and make channel estimates more robust in the presence of one or more of a variety of impairments. Frequency domain processing and/or time domain processing can be performed to reduce distortion in channel estimates.

Reference signal channel estimation

Aspects of this disclosure relate to a time-division duplex (TDD) multiple-input multiple-output (MIMO) system that includes a plurality of nodes. The plurality of nodes collectively includes antennas divided into groups. Reference signals can be transmitted from each group of antennas to one or more other groups of antennas during respective time slots. Channel estimates can be generated based on the received reference signals. The channel estimates can be jointly processed to generate calibration coefficients. Each calibration coefficient can represent a ratio associated with a transmit coefficient and a receive coefficient. Example algorithms for the joint processing are disclosed.

Time-division duplex multiple input multiple output calibration

Aspects of the disclosure relate to a selection scheme implemented by a scheduler in a multiple-input multiple-output (MIMO) network to identify which users to schedule simultaneously during the same time slot. For downlink communications and a particular frequency wholeband or sub-band, the scheduler can determine downlink channel information using uplink channel information for channels between base stations and UEs. The scheduler can then determine a strength of the channels using the downlink channel information, order the UEs using a fairness metric based on the channel strengths, and compute one or more QR decompositions to identify whether a spatial dimension of a UE is roughly or approximately orthogonal to spatial dimension(s) of other UEs selected to be served during a time slot being scheduled. If the spatial dimensions are roughly or approximately orthogonal, the scheduler selects the UE to be served at the same time as other UEs already selected.

Downlink user equipment selection

Aspects of this disclosure relate to an improved coordinated multipoint (CoMP) network operating in a millimeter wave frequency band in which user equipment (UEs) combine signals received across multiple spatial beams from multiple base stations. The improved CoMP network can achieve high throughput, low latency, and/or high reliability at millimeter wave frequencies while maintaining a reasonable network complexity (e.g., lower network overhead than CoMP networks implemented with coherent combining). For example, the improved CoMP network can include one or more base stations and one or more UEs. Multiple base stations can transmit the same data across multiple spatial beams to a UE at the same time. The base stations may use information provided by a UE to identify an active set of base stations and/or spatial beams to serve the UE.

Non-coherent cooperative multiple-input multiple-output communications

User equipment assisted multiple-input multiple-output downlink configuration

A non-geosynchronous satellite system, where each satellite has an antenna (perhaps a multi-element antenna) to form a beam pattern comprising a set of beams in the footprint of the satellite, where in one implementation each beam is substantially elliptical in shape having a minor axis and a major axis, where the minor axes are substantially collinear and the major axes are substantially oriented east to west. For a satellite, power is reduced or turned off for a subset of the set of beams, wherein each beam in the subset is reduced at or below a corresponding power level such that when a beam is powered above its corresponding power level an equivalent power flux-density (EPFD) exceeds a limit at some point on the Earth's surface.

Method and apparatus for avoiding exceeding interference limits for a non-geostationary satellite system

Aspects of this disclosure relate to pair of wireless communication devices wirelessly communicating with a network system in a coordinated manner. A secondary wireless communication device can wirelessly communicate part of a multiple-input multiple-output (MIMO) transmission associated with a primary wireless communication device (i) with the primary wireless communication device via the peer-to-peer link and (ii) with the network system via a cellular link. The secondary wireless communication device can enable the primary wireless communication device to communicate with the network system at a higher data rate and/or at a higher MIMO rank.

Multiple-input multiple-output communication with wireless communication devices

Various aspects described herein relate to techniques of spectrum sharing in beacon-assisted multi-tier wireless communications systems (e.g., 5G New Radio). A method of spectrum sharing in multi-tier wireless communications is provided that may include generating, at a first apparatus, a beacon signal including information of spectrum usage, wherein the information includes at least one or more of a pilot reference, resources allocation, one or more usage entities, or one or more sharing parameters, and sending the beacon signal to at least a second apparatus, wherein the first apparatus and the second apparatus are in a same tier or different tiers.

Techniques for beacon-assisted multi-tier spectrum sharing

Aspects of this disclosure relate to pair of wireless communication devices communicating with a network system in a coordinated manner. The network system can transmit data to and/or receive data from the pair of wireless communication devices. This can enable the network system to communicate with a primary wireless communication device of the pair at a higher data rate than a peak data rate of wirelessly communicating with the primary wireless communication device. The pair of wireless communication devices can be in communication with each other via a peer-to-peer link.

Methods of wirelessly communicating with a group of devices

In a transmission scheme wherein multi-slot packet transmissions to a remote station can be terminated by an acknowledgment signal from the remote station, code symbols can be efficiently packed over the multi-slot packet so that the remote station can easily decode the data payload of the multi-slot packet by decoding only a portion of the multi-slot packet. Hence, the remote station can signal for the early termination of the multi-slot packet transmission, which thereby increases the data throughput of the system.

Enhanced channel interleaving for optimized data throughput

Methods, systems, and devices for wireless communications are described. Efficient low-density parity-check (LDPC) scheduling of layered decoding may include receiving a message encoded as an LDPC code that includes a number of check nodes and a number of bit nodes, applying a first number of decoding iterations to decoding the message, applying a second number of decoding iterations to decoding the message after the first number of decoding iterations are applied, and decoding the message through completion of both the first number of decoding iterations and the second number of decoding iterations. In some cases, only a portion of the number of check nodes is decoded during each of the first number of decoding iterations and all of the number of check nodes are decoded during each of the second number of decoding iterations.

Scheduling for low-density parity-check codes

Aspects of this disclosure relate to cooperative multiple-input multiple-output (MIMO) downlink scheduling. Features are described for scheduling transmissions within a MIMO network to efficiently allocate resources considering the needs and/or characteristics of devices served by the network. The downlink mode or active set may be scheduled based at least in part on the channel state information and additional network system information detected by or otherwise available to the scheduling device.

Cooperative multiple-input multiple-output downlink scheduling

Power consumption by a communication satellite may be reduced by operating in a transmission time interval (TTI) gating mode, in which an on period is provided for the satellite to transmit a reference signal (RS), control signals, and a portion of data within an on period through a forward link to a user terminal (UT), followed by an off period in which forward link transmission ceases. During the off period of the TTI, the satellite may turn off its forward link power amplifier and cease transmission of data to the UT. A gateway may send a signal enabling the TTI gating mode, as well as information specifying the TTI gating configuration, such as the length of the on or off period of the TTI, to the satellite.

Method and apparatus for discontinuous transmission in bent-pipe relay in satellite communication systems

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San Diego, CA, United States of America

Peter J Black