WO2004039022A3 - Correction for differences between downlink and uplink channel responses - Google Patents
Correction for differences between downlink and uplink channel responses Download PDFInfo
- Publication number
- WO2004039022A3 WO2004039022A3 PCT/US2003/034515 US0334515W WO2004039022A3 WO 2004039022 A3 WO2004039022 A3 WO 2004039022A3 US 0334515 W US0334515 W US 0334515W WO 2004039022 A3 WO2004039022 A3 WO 2004039022A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- downlink
- uplink channel
- correction factors
- correction
- channel responses
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
- H04B7/0421—Feedback systems utilizing implicit feedback, e.g. steered pilot signals
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- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
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- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
- H04B7/0669—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different channel coding between antennas
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Abstract
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10150226.8A EP2166688B1 (en) | 2002-10-25 | 2003-10-24 | Correction for differences between downlink and uplink channel responses |
BR0315538-2A BR0315538A (en) | 2002-10-25 | 2003-10-24 | Channel Calibration for Time Division Duplex Communication System |
CA002502801A CA2502801A1 (en) | 2002-10-25 | 2003-10-24 | Correction for differences between downlink and uplink channel responses |
CN2003801067973A CN1751484B (en) | 2002-10-25 | 2003-10-24 | Channel calibration for a time division duplexed communication system |
EP03781525.5A EP1557017B1 (en) | 2002-10-25 | 2003-10-24 | Channel calibration for a time division duplexed communication system |
JP2004547245A JP2006504336A (en) | 2002-10-25 | 2003-10-24 | Channel calibration for time division duplex communication systems. |
AU2003287293A AU2003287293C1 (en) | 2002-10-25 | 2003-10-24 | Correction for differences between downlink and uplink channel responses |
MXPA05004391A MXPA05004391A (en) | 2002-10-25 | 2003-10-24 | Correction for differences between downlink and uplink channel responses. |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42146202P | 2002-10-25 | 2002-10-25 | |
US42130902P | 2002-10-25 | 2002-10-25 | |
US60/421,462 | 2002-10-25 | ||
US60/421,309 | 2002-10-25 | ||
US10/693,169 US8134976B2 (en) | 2002-10-25 | 2003-10-23 | Channel calibration for a time division duplexed communication system |
US10,693,169 | 2003-10-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004039022A2 WO2004039022A2 (en) | 2004-05-06 |
WO2004039022A3 true WO2004039022A3 (en) | 2004-09-16 |
Family
ID=32180511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2003/034515 WO2004039022A2 (en) | 2002-10-25 | 2003-10-24 | Correction for differences between downlink and uplink channel responses |
Country Status (11)
Country | Link |
---|---|
US (2) | US8134976B2 (en) |
EP (3) | EP2357769B1 (en) |
JP (3) | JP2006504336A (en) |
KR (1) | KR101014502B1 (en) |
CN (1) | CN1751484B (en) |
AU (1) | AU2003287293C1 (en) |
BR (1) | BR0315538A (en) |
CA (1) | CA2502801A1 (en) |
MX (1) | MXPA05004391A (en) |
TW (1) | TWI363515B (en) |
WO (1) | WO2004039022A2 (en) |
Cited By (6)
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US8873365B2 (en) | 2002-10-25 | 2014-10-28 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US8913529B2 (en) | 2002-10-25 | 2014-12-16 | Qualcomm Incorporated | MIMO WLAN system |
US9154274B2 (en) | 2002-10-25 | 2015-10-06 | Qualcomm Incorporated | OFDM communication system with multiple OFDM symbol sizes |
US9312935B2 (en) | 2002-10-25 | 2016-04-12 | Qualcomm Incorporated | Pilots for MIMO communication systems |
US9473269B2 (en) | 2003-12-01 | 2016-10-18 | Qualcomm Incorporated | Method and apparatus for providing an efficient control channel structure in a wireless communication system |
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US6360100B1 (en) | 1998-09-22 | 2002-03-19 | Qualcomm Incorporated | Method for robust handoff in wireless communication system |
US8194770B2 (en) * | 2002-08-27 | 2012-06-05 | Qualcomm Incorporated | Coded MIMO systems with selective channel inversion applied per eigenmode |
US8218609B2 (en) | 2002-10-25 | 2012-07-10 | Qualcomm Incorporated | Closed-loop rate control for a multi-channel communication system |
US8134976B2 (en) | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8570988B2 (en) * | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8208364B2 (en) * | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US7324429B2 (en) | 2002-10-25 | 2008-01-29 | Qualcomm, Incorporated | Multi-mode terminal in a wireless MIMO system |
US8169944B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US8170513B2 (en) * | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Data detection and demodulation for wireless communication systems |
US7333788B2 (en) * | 2002-12-20 | 2008-02-19 | Texas Instruments Incorporated | Method for calibrating automatic gain control in wireless devices |
US7058367B1 (en) | 2003-01-31 | 2006-06-06 | At&T Corp. | Rate-adaptive methods for communicating over multiple input/multiple output wireless systems |
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US8285226B2 (en) * | 2004-05-07 | 2012-10-09 | Qualcomm Incorporated | Steering diversity for an OFDM-based multi-antenna communication system |
US8923785B2 (en) * | 2004-05-07 | 2014-12-30 | Qualcomm Incorporated | Continuous beamforming for a MIMO-OFDM system |
JP4447372B2 (en) * | 2004-05-13 | 2010-04-07 | 株式会社エヌ・ティ・ティ・ドコモ | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION DEVICE, RADIO RECEPTION DEVICE, RADIO COMMUNICATION METHOD, AND CHANNEL ESTIMATION METHOD |
US7110463B2 (en) * | 2004-06-30 | 2006-09-19 | Qualcomm, Incorporated | Efficient computation of spatial filter matrices for steering transmit diversity in a MIMO communication system |
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KR100725773B1 (en) * | 2004-08-20 | 2007-06-08 | 삼성전자주식회사 | Apparatus and method for adaptively changing the uplink power control scheme depending on the status of mobile station in a wireless mobile communication system using time division duplexing scheme |
US7978778B2 (en) | 2004-09-03 | 2011-07-12 | Qualcomm, Incorporated | Receiver structures for spatial spreading with space-time or space-frequency transmit diversity |
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JP2011050063A (en) | 2011-03-10 |
CA2502801A1 (en) | 2004-05-06 |
TWI363515B (en) | 2012-05-01 |
US20120176928A1 (en) | 2012-07-12 |
JP2006504336A (en) | 2006-02-02 |
AU2003287293C1 (en) | 2009-09-24 |
AU2003287293B2 (en) | 2009-04-23 |
US20040085939A1 (en) | 2004-05-06 |
BR0315538A (en) | 2006-01-17 |
AU2003287293A1 (en) | 2004-05-13 |
EP2357769B1 (en) | 2017-12-06 |
JP5528867B2 (en) | 2014-06-25 |
CN1751484A (en) | 2006-03-22 |
EP2357769A3 (en) | 2013-05-08 |
US8134976B2 (en) | 2012-03-13 |
EP2166688A3 (en) | 2010-03-31 |
CN1751484B (en) | 2010-08-11 |
WO2004039022A2 (en) | 2004-05-06 |
KR20050065628A (en) | 2005-06-29 |
EP1557017B1 (en) | 2016-06-08 |
US8750151B2 (en) | 2014-06-10 |
EP1557017A2 (en) | 2005-07-27 |
KR101014502B1 (en) | 2011-02-14 |
TW200417176A (en) | 2004-09-01 |
EP2166688A2 (en) | 2010-03-24 |
EP2357769A2 (en) | 2011-08-17 |
JP2010193477A (en) | 2010-09-02 |
EP2166688B1 (en) | 2020-03-18 |
MXPA05004391A (en) | 2005-07-26 |
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