Future Wei Technologies, Inc.

Intel Corporation

Broadcom Corporation

Huawei Technologies Co., Limited

Phase Sensitive Innovations, Inc.

Xiao-Feng Qi

Guosen Yue

Arkady Molev Shteiman

Nelson Ray Sollenberger

Wei Luo

Arkady Molev-Shteiman

SaiRamesh Nammi

Hongwei Kong

Li Fung Chang

Dennis W Prather

Mark Hahm

Janusz A Murakowski

Shouyuan Shi

Stefano Galli

Garrett Schneider

Keith A Holt

Munawar Kermalli

Yun Liu

Brandon Barnett

Gordon D Holt

Kaiping Li

Sudhakar Kalluri

Amod V Dandawate

Chunming Han

Weng Chon Ao

Richard Wykoff

Bohan Zhang

Sorin Davidovici

Method and apparatus are provided for estimating first downlink (DL) channel information of first DL channels in accordance with reference signals received on first uplink (UL) channels, the first UL channels being a subset of available UL channels, and the first DL channels corresponding to the first UL channels. Channel feedback is received for a set of DL channels, and second DL channel information is estimated in accordance with the estimated first DL channel information and the received channel feedback.

Methods and apparatus for channel estimation and precoding with incomplete channel observation and channel state information feedback

A method includes calculating first high dimensional channel characteristics of a first frequency band in accordance with measurements of the first frequency band; estimating a power angle delay spectrum (PADS) in accordance with the first high dimensional channel characteristics of the first frequency band; determining a domain conversion matrix for a second frequency band in accordance with the PADS; and generating second high dimensional channel characteristics of the second frequency band in accordance with the domain conversion matrix and the first high dimensional channel characteristics of the first frequency band.

Methods and apparatus for multi-domain conversions of high dimensional channel statistics

In certain embodiments, a system includes an optical switch matrix, an optical lens coupled to the switch matrix, and a wireless transmitter coupled to the lens. The switch matrix is configured to switch first optical signals from input ports to output ports of the switch matrix, and output second optical signals that are based at least partially on the first optical signals. The lens is configured to transform wave formats of the second optical signals based on the output ports over which the second optical signals are received. The transmitter includes an antenna array and circuitry coupled to the array. The circuitry is configured to receive the second optical signals from the lens, convert the second optical signals into beamformed wireless signals in accordance with the transformed formats, and transmit the beamformed wireless signals, which signals have spatial characteristics in accordance with the transformed formats, over the array.

Apparatus and methods for transmitting signals using optical lens as a beamformer

In certain embodiments, an apparatus includes a switch matrix and frequency band isolation circuitry. The switch matrix is configured to receive, at an input port, an electrical signal, which corresponds to a transmission signal received at antennas of an antenna array. The transmission signal corresponds to a transmission spatial sector of the array. The electrical signal includes first and second signal portions in first and second frequency bands, respectively, the electrical signal having been generated from an optical signal that corresponds to the transmission signal. The switch matrix is configured to direct, via an output port and in accordance with a control signal, the electrical signal to a first of multiple signal conversion paths.

Apparatus and methods for receiving signals using optical lens as a beamformer

A method includes determining position information of a main transmission sink having a primary transmission path to a communications device and of at least one mirror transmission sink associated with the main transmission sink by at least one secondary transmission path between the main transmission sink and the communications device, estimating primary channels between the communications device and antennas of an antenna array of the main transmission sink and secondary channels between the communications device and antennas of an antenna array of the at least one mirror transmission sink, the estimating is at least partially based on the position information of the main transmission sink and the at least one mirror transmission sink and position information of the antennas in the antenna arrays, and instructing use of the estimated primary channels and the estimated secondary channels.

System and method for multi-source channel estimation

A hybrid combination of analog RF beamforming and digital pre-coding is used to improve signal-to-noise ratio and mitigate interference as between an RF base station and a plurality of wireless receivers within a cell area of the base station. Feedback overhead for beamforming training may be reduced by using indices for identifying the preferred beams of each wireless receiver. Scheduling for channel training may be based on identifying non-colliding ones of the RF beams and assigning these to corresponding wireless receivers which can best use the assigned beams in shared transmission slots.

Multiuser MIMO for large antenna systems with hybrid beamforming

A device comprises a memory that stores instructions executed by one or more processors to obtain a plurality of received signals transmitted by a user equipment from a plurality of antenna elements in a cellular network. A plurality of received signals transmitted by a user equipment from a plurality of antenna elements in a cellular network are obtained, and a plurality of complex channel values are calculated in an angle domain for a horizontal arrival angle and a vertical arrival angle per a received ray in a plurality of received rays in response to the plurality of received signals. An expected value of the plurality of channel values are calculated to obtain a power value for the horizontal arrival angle and vertical arrival angle having a time delay per the received ray.

High dimensional (HiDi) radio environment characterization and representation

The disclosure relates to a method for decoding a transport block encoded with multiple codeblock segments. User equipment determines whether to decode one of a transport block cyclic redundancy check (CRC) and a codeblock segment CRC based on a speed of user equipment. In response to the speed of the user equipment being greater than a threshold, the user equipment decodes the transport block CRC and generates an acknowledgement (ACK)/non-acknowledgement (NAK). In response to the speed of the UE being less than or equal to the threshold, during a first data transmission, the user equipment decodes the codeblock segment CRC for each of the multiple codeblock segments and generates the ACK/NAK. During a second and latter data transmissions, the user equipment decodes the codeblock segment CRC for each of the multiple codeblock segments that failed in the first data transmission and generates the ACK/NAK.

Decoding procedures in systems with codeblock segmentation

Receivers including estimation unit (EU) circuits and related processing techniques for wireless systems are provided. Efficient expressions for quadrature amplitude modulation (QAM) symbol mean and variance calculations are utilized with efficient expressions and implementations that are adaptive to different orders of QAM formats. An EU circuit includes a mean estimation unit (MEU) circuit and/or second moment estimation unit (SEU) circuit. Each estimation unit circuit is configured to receive a variable QAM normalization factor so that the circuit can be adapted to different QAM orders. Each MEU or SEU circuit can be configured for sequential and/or parallel processing. A pool including multiple MEU circuits and/or a pool including multiple SEU circuits is provided in one embodiment, with a control unit for configuring and reconfiguring the pools of circuits for mean and variance estimation for data streams of QAM symbols.

Hardware virtualization for mean and variance estimations of QAM symbols

The disclosure relates converting an analog input signal to a digital output signal in a number of successive approximation cycles. A sampled analog input signal is received, and a decision node is loaded from a decision tree stored in memory, where each decision node in the decision tree stores an optimal threshold value and an address to one or more next decision nodes. The optimal threshold value, a first output flag and a second output flag associated with a currently loaded decision node is read from the decision tree in the memory, and the sampled first analog input signal is compared with the optimal threshold value and, based on a result of the comparison, a next decision node is loaded from the decision tree stored in memory according to the address associated with the currently loaded decision node or the digital output signal is output.

Minimum search length analog to digital converter

A method for communicating using a large scale multiple input multiple output (MIMO) antenna array, the method includes determining angular domain channel estimates of the large scale MIMO antenna array in accordance with antenna domain channel estimates of the large scale MIMO antenna array, identifying significant beams of the large scale MIMO antenna array by maximizing the angular domain channel estimates, and communicating with at least one receiving device utilizing the significant beams as identified.

System and method for large scale multiple input multiple output communications

A method for adaptive user equipment (UE) grouping and beamforming includes the assignment each of a plurality of user equipment (UE) devices into a respective UE group of a plurality of UE groups. Each UE group has at least one UE device. A UE device is reassigned from the respective UE group to which it was previously assigned to an updated UE group. An updated respective beamforming vector is generated for the updated UE group until the updated respective beamforming vector for each UE group produces a largest average UE rate for the updated UE group.

Adaptively grouped user equipment multicasting and beamforming

Provided are an apparatus and method for pre-coding data based on quantized channel state information and channel statistics. In use, channel statistics are collected. Further, one or more reference signals are sent to a wireless device via at least one channel. Thereafter, quantized channel state information is received that corresponds to the at least one channel, where the quantized channel state information is sent by the wireless device based on the one or more reference signals. Data is pre-coded based on the quantized channel state information and the channel statistics. Further, the pre-coded data is transmitted to the wireless device.

Apparatus and method for pre-coding data based on channel statistics

The disclosure relates to technology for iterative localization and channel estimation in a communication system. A radio network node detects user location information from user equipment in a geographic region, where the geographic region includes a location cluster having multiple location levels. A location signature profile is formed for each level based on the location signature of a corresponding location level in the cluster, and a filter is generated for each level based on the location signature. Upon application of the filter that matches the location level of the location user information, the channel is estimated and the user location information is updated based on the channel estimation. The process is repeated until the user location information converges with a preselected convergence value.

Channel estimation in large scale MIMO systems using iterative location based spatial filtering

A device comprises a memory that stores instructions executed by one or more processors to obtain a plurality of received signals transmitted by a user equipment from a plurality of antenna elements in a cellular network. A plurality of complex channel values are calculated in an angle domain for a horizontal arrival angle and a vertical arrival angle per a received ray in a plurality of received rays in response to the plurality of received signals. A frequency-offset estimation is calculated and applied to the plurality of complex channel values. The plurality of offset complex channel values are transformed to a plurality of channel values in a time domain. A time-offset estimation is calculated and applied to the plurality of channel values. An expected value of the plurality of channel values is obtained to obtain a power angle delay profile for the geographical location of the user equipment.

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Westfield, NJ, United States of America

Xiao-Feng Qi