WO2013158668A3 - Methods and apparatus to improve channel estimation in communication systems - Google Patents

Methods and apparatus to improve channel estimation in communication systems Download PDF

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Publication number
WO2013158668A3
WO2013158668A3 PCT/US2013/036818 US2013036818W WO2013158668A3 WO 2013158668 A3 WO2013158668 A3 WO 2013158668A3 US 2013036818 W US2013036818 W US 2013036818W WO 2013158668 A3 WO2013158668 A3 WO 2013158668A3
Authority
WO
WIPO (PCT)
Prior art keywords
codeword
puncture
methods
communication systems
channel estimation
Prior art date
Application number
PCT/US2013/036818
Other languages
French (fr)
Other versions
WO2013158668A2 (en
Inventor
Sundar Subramanian
Xinzhou Wu
Quan GENG
Cyril Measson
Thomas J. Richardson
Junyi Li
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Publication of WO2013158668A2 publication Critical patent/WO2013158668A2/en
Publication of WO2013158668A3 publication Critical patent/WO2013158668A3/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041Arrangements at the transmitter end
    • H04L1/0042Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056Systems characterized by the type of code used
    • H04L1/0067Rate matching
    • H04L1/0068Rate matching by puncturing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/2603Signal structure ensuring backward compatibility with legacy system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/261Details of reference signals
    • H04L27/2613Structure of the reference signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0224Channel estimation using sounding signals
    • H04L25/0226Channel estimation using sounding signals sounding signals per se
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus generates a codeword, determines at least one puncture to the codeword based on allowing a legacy receiver to decode the codeword without knowledge of the at least one puncture, replaces each of the at least one puncture with a pilot, and transmits the codeword. The apparatus may also generate an IEEE 802.11 codeword having pilots in a first set of subcarriers, and puncture the codeword with additional pilots unknown to a legacy receiver in a second set of subcarriers. Accordingly, when an original set of pilot symbols is insufficient or inappropriately placed in a resource structure, a codeword may be transmitted with a new pilot structure capable of being decoded by legacy receivers not aware of the new pilot structure.
PCT/US2013/036818 2012-04-17 2013-04-16 Methods and apparatus to improve channel estimation in communication systems WO2013158668A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/448,638 2012-04-17
US13/448,638 US9094164B2 (en) 2012-04-17 2012-04-17 Methods and apparatus to improve channel estimation in communication systems

Publications (2)

Publication Number Publication Date
WO2013158668A2 WO2013158668A2 (en) 2013-10-24
WO2013158668A3 true WO2013158668A3 (en) 2014-01-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/036818 WO2013158668A2 (en) 2012-04-17 2013-04-16 Methods and apparatus to improve channel estimation in communication systems

Country Status (2)

Country Link
US (1) US9094164B2 (en)
WO (1) WO2013158668A2 (en)

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CN104301275B (en) * 2014-09-05 2017-09-12 江苏中兴微通信息科技有限公司 The pilot frequency locations optimized based on pilot interval determine method and R-T unit
US9692616B1 (en) * 2015-12-02 2017-06-27 Samsung Electronics Co., Ltd. Apparatus for and method of channel estimation buffer compression via decimation, prediction, and error encoding
WO2018129695A1 (en) * 2017-01-12 2018-07-19 Qualcomm Incorporated Puncturing and repetition for data encoding
EP3577815A1 (en) * 2017-02-06 2019-12-11 Telefonaktiebolaget LM Ericsson (publ) Retransmission for punctured signals
US10560220B2 (en) * 2017-05-23 2020-02-11 Qualcomm Incorporated Systems and methods for mitigating decoding errors due to puncturing of symbols
US11259254B2 (en) * 2018-08-08 2022-02-22 Telefonaktiebolaget Lm Ericsson (Publ) Variable-length coding in a NOMA-based communication system

Citations (5)

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US20050195734A1 (en) * 2004-02-20 2005-09-08 Kabushiki Kaisha Toshiba Transmission signals, methods and apparatus
US20110199986A1 (en) * 2010-02-12 2011-08-18 Mo-Han Fong Reference signal for a coordinated multi-point network implementation
US20110244877A1 (en) * 2009-10-08 2011-10-06 Qualcomm Incorporated Method and apparatus for using channel state information reference signal in wireless communication system
US20110252139A1 (en) * 2009-10-05 2011-10-13 Qualcomm Incorporated Method and apparatus for puncturing data regions for signals to minimize data loss
US20110286423A1 (en) * 2009-04-24 2011-11-24 Huawei Technologies Co., Ltd. Method for generating reference signals

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US8363744B2 (en) * 2001-06-10 2013-01-29 Aloft Media, Llc Method and system for robust, secure, and high-efficiency voice and packet transmission over ad-hoc, mesh, and MIMO communication networks
US6904550B2 (en) 2002-12-30 2005-06-07 Motorola, Inc. Velocity enhancement for OFDM systems
US9271221B2 (en) * 2004-06-22 2016-02-23 Apple Inc. Closed loop MIMO systems and methods
US8085875B2 (en) * 2004-07-16 2011-12-27 Qualcomm Incorporated Incremental pilot insertion for channnel and interference estimation
KR100767312B1 (en) * 2005-09-05 2007-10-17 한국전자통신연구원 Apparatus for generating down link signal, and method and apparatus for cell search in cellular system
US7706455B2 (en) * 2005-09-26 2010-04-27 Intel Corporation Multicarrier transmitter for multiple-input multiple-output communication systems and methods for puncturing bits for pilot tones
EP1811734B1 (en) 2006-01-19 2009-12-16 Samsung Electronics Co., Ltd. Method and apparatus for controlling transmission and reception of dedicated pilots according to MCS level in a wireless communication system
US8583132B2 (en) 2006-05-18 2013-11-12 Qualcomm Incorporated Efficient channel structure for a wireless communication system
WO2008089402A2 (en) 2007-01-18 2008-07-24 Proximetry, Inc. System and method for incorporating dynamic orthogonal frequency-division multiplexing into wireless network protocols
US20090031185A1 (en) * 2007-07-23 2009-01-29 Texas Instruments Incorporated Hybrid arq systems and methods for packet-based networks
US20090028100A1 (en) 2007-07-25 2009-01-29 Qualcomm Incorporated Methods and apparatus for transmitter identification in a wireless network
JP5703227B2 (en) * 2008-10-22 2015-04-15 ゼットティーイー(ユーエスエー)インコーポレーテッド Reverse link acknowledgment signaling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050195734A1 (en) * 2004-02-20 2005-09-08 Kabushiki Kaisha Toshiba Transmission signals, methods and apparatus
US20110286423A1 (en) * 2009-04-24 2011-11-24 Huawei Technologies Co., Ltd. Method for generating reference signals
US20110252139A1 (en) * 2009-10-05 2011-10-13 Qualcomm Incorporated Method and apparatus for puncturing data regions for signals to minimize data loss
US20110244877A1 (en) * 2009-10-08 2011-10-06 Qualcomm Incorporated Method and apparatus for using channel state information reference signal in wireless communication system
US20110199986A1 (en) * 2010-02-12 2011-08-18 Mo-Han Fong Reference signal for a coordinated multi-point network implementation

Non-Patent Citations (1)

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Title
"4G LTE/LTE-Advanced for Mobile Broadband - Chapter 10", 29 March 2011, article ERIK DAHLMAN ET AL: "4G LTE/LTE-Advanced for Mobile Broadband - Chapter 10", pages: 145 - 202, XP055046016 *

Also Published As

Publication number Publication date
US20130272443A1 (en) 2013-10-17
WO2013158668A2 (en) 2013-10-24
US9094164B2 (en) 2015-07-28

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