WO2013158668A3 - Methods and apparatus to improve channel estimation in communication systems - Google Patents
Methods and apparatus to improve channel estimation in communication systems Download PDFInfo
- 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
Links
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
- H04L1/0042—Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0067—Rate matching
- H04L1/0068—Rate matching by puncturing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2603—Signal structure ensuring backward compatibility with legacy system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-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.
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
ID=49325081
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) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
2012
- 2012-04-17 US US13/448,638 patent/US9094164B2/en not_active Expired - Fee Related
-
2013
- 2013-04-16 WO PCT/US2013/036818 patent/WO2013158668A2/en active Application Filing
Patent Citations (5)
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)
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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