Qualcomm Incorporated

Samsung Electronics Co., Ltd.

Apple Inc.

Yingqun Yu

Farrokh Abrishamkar

Wenjun Li

Jungwon Lee

Inyup Kang

Divaydeep Sikri

Ori Shental

Ni-Chun Wang

Dawei Zhang

Hong He

Wei Zeng

Yushu Zhang

Haitong Sun

Huaning Niu

Oghenekome Oteri

Chunxuan Ye

Weidong Yang

Yang Tang

Seyed Ali Akbar Fakoorian

Jie Cui

Chunhai Yao

Sigen Ye

Manasa Raghavan

Jung Hyun Bae

Michael Lee McCloud

Prashant Udupa Sripathi

Sungsoo Kim

Linbo Li

Insung Kang

Jaber Mohammad Borran

Heejin Roh

Tiangao Gou

Vladislav Sorokine

Andrew K Kan

Ferrokh Abrishamkar

Jung-Won Lee

CheolHee Park

A communication system provides reliable wideband communications with reduced power consumption in a user equipment (UE) receiver. A UE may include receiver circuitry to receive a radio frequency (RF) signal from a wireless network and output an analog baseband signal. The RF signal includes M copies of a duplicated signal in a frequency domain. The analog baseband signal includes the M copies of the duplicated signal uniformly offset from one another in the frequency domain by a bandwidth F and including a gap between adjacent copies. The UE further includes an anti-aliasing analog filter an analog to digital converter (ADC). The ADC samples an output of the anti-aliasing analog filter at a sampling frequency selected to obtain a digital baseband signal comprising a combined digital copy of the M copies of the duplicated signal folded over each other.

Redundant transmission for wideband radio systems

A method and an apparatus are provided for determining whether an enhanced physical downlink control channel (ePDCCH) transmission exists for a user equipment (UE) in a subframe. The UE receives a transmission on physical downlink control channel (PDCCH) resources of the subframe. Downlink control information (DCI) is extracted from the PDCCH resources. The DCI includes at least one bit indicating whether the ePDCCH transmission exists for the UE in the subframe. The UE determines whether the ePDCCH transmission exists using the at least one bit. Additional symbols of the subframe are buffered and decoded when the ePDCCH transmission exists.

Method and apparatus for providing advanced indication for ePDCCH

Methods, apparatuses, and systems for improved channel estimation in an Orthogonal Frequency Division Multiplexing (OFDM) system are discussed. In one example discussed herein, joint two-dimensional Minimum Mean-Square Error (2D-MMSE) channel estimation is performed on any Resource Element (REs) containing a reference signal in a Resource Block (RB), one-dimensional Minimum Mean-Square Error (1D-MMSE) channel estimation is performed in the frequency domain on each OFDM symbol in the RB, and then channel estimation is performed in the time domain on each frequency sub-carrier in the RB. In another example discussed herein, Power Delay Profiles (PDPs) and/or frequency correlations are calculated using minimax optimization and then stored in a Look-Up Table (LUT) indexed by estimated Signal to Noise Ratio (SNR) and the estimated maximum delay spread. A portable device could use such an LUT in MMSE calculations.

Method and apparatus for robust two-stage OFDM channel estimation

A computing system includes: an inter-device interface configured to communicate receiver signal corresponding to serving signal contemporaneous with interference signal from an interference source at an interference-aware receiver; a communication unit, coupled to the inter-device interface, configured to: determine a serving-interference metric for describing capability of the interference-aware receiver associated with serving communication capacity and interference communication capacity, and generating feedback signal including the serving-interference metric for communicating the feedback signal to a node device. An embodiment includes: an inter-device interface configured to communicate feedback signal including a serving-interference metric for representing an interference-aware receiver processing receiver signal corresponding to serving signal contemporaneous with interference signal; a communication unit, coupled to the inter-device interface, configured to: generate a communication rate profile based on the serving-interference metric for describing the interference-aware receiver, and determine serving detail based on the communication rate profile for communicating serving content to the interference-aware receiver.

Computing system with feedback mechanism and method of operation thereof

A wireless communication system includes: a communication interface configured to receive a desired input signal and an interference input signal; and a control module, coupled to the communication interface, configured to calculate a capacity region to maximize a first R1 reference for the desired input signal by removing the interference input signal.

Wireless communication system with interference mitigation mechanism and method of operation thereof

An apparatus and method for a two-stage linear/nonlinear interference cancellation comprising processing a receive signal to produce a first descrambled signal; and processing the first descrambled signal to produce a detected signal. In one aspect, a first interference canceller module is used for processing the received signal and a second interference canceller module is used for processing the first descrambled signal. In one aspect, the first interference canceller is a linear interference canceller (IC) and the second interference canceller is a linear/nonlinear interference canceller (IC).

Apparatus and method for two-stage linear/nonlinear interference cancellation

A method of operation of a wireless communication system includes: tuning a receiver front end for receiving a radio-frequency signal; correcting, with an in-phase/quadrature (I/Q) compensation module, an I/Q imbalance from the receiver front end including estimating by a linear minimum mean-square error (LMMSE) module; and processing by a base band receiver for digitizing an output of the I/Q compensation module for generating a receiver data.

Wireless communication system with direct conversion mechanism and method of operation thereof

A communication system includes: a covariance module configured to calculate a joint-covariance based on a receiver signal for communicating a communication content in a transmitter signal with an interference signal using subcarriers based on a space-frequency block-coding scheme; a preparation module, coupled to the covariance module, configured to generate a joint-whitener with a control unit based on the joint-covariance for randomizing the interference signal; a joint whitening module, coupled to the preparation module, configured to generate a joint-whitening output based on the receiver signal and the joint-whitener; a message processing module, coupled to the joint whitening module, configured to determine a joint-estimation feedback based on the joint-whitening output; and a cancellation module, coupled to the message processing module, configured to cancel the joint-estimation feedback from the receiver signal for communicating the communication content with a device.

Communication system with whitening feedback mechanism and method of operation thereof

An apparatus and method for channel estimation comprising obtaining a response matrix G(l) using Q quantity pilots; constructing a sensing matrix Wbased on K quantity tones, L quantity symbols and P quantity multipaths; and using compressive sensing channel estimation to determine an equivalent channel matrix G(i) based on the response matrix G(l) and the sensing matrix W.

Apparatus and method for channel estimation using compressive sensing

An apparatus and method for compressive sensing tap identification for channel estimation comprising identifying a set of significant taps in the time domain; representing a time-flat channel response using a Taylor series expansion with the set of significant taps; converting the time-flat channel response to a vectorized channel response; transforming the vectorized channel response to a compressive sensing (CS) polynomial frequency response; aggregating the CS polynomial frequency response into a stacked frequency response; converting the stacked frequency response into a measured pilot frequency response; estimating a channel parameter vector based on the measured pilot frequency response; and generating a reconstructed channel response from the channel parameter vector.

Apparatus and method for compressive sensing tap identification for channel estimation

Systems and methods for multi-user detection are provided. In one aspect of the disclosure, an apparatus is provided. The apparatus comprises a processing unit configured to process a plurality of received chips into a plurality of received symbols for a plurality of users. The apparatus further comprises a computation unit configured to compute a multi-user matrix relating a plurality of user symbols for the plurality of users to the plurality of received symbols and a detection unit configured to detect the plurality of user symbols for the plurality of users using the computed multi-user matrix and the plurality of received symbols.

Method and system for multi-user detection using two-stage processing

Systems and methods for multi-user detection in a multiple access system are provided. In one aspect, an apparatus is provided. The apparatus comprises a processing unit configured to process received chips into received symbols for a plurality of users and a computation unit configured to compute a multi-user matrix using a Hadamard matrix, wherein the multi-user matrix relates user symbols for the plurality of users to the received symbols. The apparatus further comprises a detection unit configured to detect the user symbols for the plurality of users using the received symbols and the computed multi-user matrix.

An apparatus and method for channel estimation comprising determining a channel impulse response using a Taylor series expansion with a plurality of Taylor series coefficients; determining a channel frequency response based on the channel impulse response; collecting the channel frequency response over a plurality of symbols to obtain a composite channel frequency response; generating a sensing matrix based on the Taylor series expansion; and determining the plurality of Taylor series coefficients based on the composite channel frequency response and the sensing matrix using compressive sensing channel estimation.

Apparatus and method for channel estimation using compressive sensing based on Taylor series expansion

Systems and methods for inter-cell interference cancellation are provided. In one aspect of the disclosure, an apparatus is provided. The apparatus comprises a cell computation unit configured to compute receive chips for a first interfering cell and a subtraction unit configured to remove the computed receive chips for the first interfering cell from received chips at a receiver. The apparatus further comprises a processing unit configured to process the received chips with the computed receive chips for the first interfering cell removed into received symbols and a detection unit configured to detect user symbols for a target cell from the received symbols.

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San Diego, CA, United States of America

Yingqun Yu