[go: up one dir, main page]

UA90244C2 - Pilot transmissions schemes for use in wireless multi-carrier communication systems - Google Patents

Pilot transmissions schemes for use in wireless multi-carrier communication systems

Info

Publication number
UA90244C2
UA90244C2 UAA200507804A UA2005007804A UA90244C2 UA 90244 C2 UA90244 C2 UA 90244C2 UA A200507804 A UAA200507804 A UA A200507804A UA 2005007804 A UA2005007804 A UA 2005007804A UA 90244 C2 UA90244 C2 UA 90244C2
Authority
UA
Ukraine
Prior art keywords
pilot
pilots
orthogonality
communication systems
frequency
Prior art date
Application number
UAA200507804A
Other languages
Russian (ru)
Ukrainian (uk)
Inventor
Джон Е. СМИ
Джей Родни УОЛТОН
Дурга Прасад МАЛЛАДИ
Original Assignee
Квелкомм Инкорпорейтед
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 Квелкомм Инкорпорейтед filed Critical Квелкомм Инкорпорейтед
Publication of UA90244C2 publication Critical patent/UA90244C2/en

Links

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

Pilot transmission schemes suitable for use in wireless multi-carrier (e.g.. OFDM) communication systems. These pilot transmission schemes may utilize frequency, lime, or both frequency and time orthogonality to achieve orthogonality among the pilots transmitted by multiple base stations on the downlink. Frequency orthogonality is achieved by transmitting pilots on disjoint sets of subbands. Time orthogonality is achieved by transmitting pilots using different orthogonal codes (e.g.. Walsh codes). The pilots may also be scrambled with different scrambling codes, which are used to randomize pilot interference and to enable identification of the transmitters of these pilots. Pilot interference cancellation may be performed to improve performance since subbands used for data transmission by one transmitter may also be used for pilot transmission by another transmitter. Pilot interference is estimated and then subtracted from received symbols to obtain pilot-canceled symbols having improved quality.
UAA200507804A 2003-01-07 2004-01-07 Pilot transmissions schemes for use in wireless multi-carrier communication systems UA90244C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43860103P 2003-01-07 2003-01-07

Publications (1)

Publication Number Publication Date
UA90244C2 true UA90244C2 (en) 2010-04-26

Family

ID=36606069

Family Applications (1)

Application Number Title Priority Date Filing Date
UAA200507804A UA90244C2 (en) 2003-01-07 2004-01-07 Pilot transmissions schemes for use in wireless multi-carrier communication systems

Country Status (2)

Country Link
CN (2) CN1751489B (en)
UA (1) UA90244C2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5074501B2 (en) * 2006-09-11 2012-11-14 テレフオンアクチーボラゲット エル エム エリクソン（パブル） Time-frequency hopping pattern detection
WO2008039096A1 (en) * 2006-09-29 2008-04-03 Intel Corporation Interfering base stations recognition method and scheme for 802.16e systems
CN100589470C (en) * 2006-10-20 2010-02-10 北京泰美世纪科技有限公司 A data transmission and reception system and method for distinguishing cells by scrambling code
US8457315B2 (en) * 2007-01-05 2013-06-04 Qualcomm Incorporated Pilot transmission in a wireless communication system
CN100534048C (en) 2007-04-27 2009-08-26 中控科技集团有限公司 Distributed Ethernet system and method for inspecting fault based thereon
CN101388686B (en) * 2007-09-14 2013-08-07 中兴通讯股份有限公司 Method and device implementing downlink pilot under coexistence of uni-cast and broadcast multicast service
US9867203B2 (en) * 2008-07-11 2018-01-09 Qualcomm Incorporated Synchronous TDM-based communication in dominant interference scenarios
KR101208549B1 (en) 2008-08-05 2012-12-05 엘지전자 주식회사 Reference signal transmission method for downlink multiple input multiple output system
US20100220651A1 (en) * 2009-03-02 2010-09-02 Mediatek Inc. Method and apparatus for broadcasting and receiving system information in OFDMA systems
WO2010109513A1 (en) * 2009-03-23 2010-09-30 富士通株式会社 Radio communication system, base station device, terminal, and radio communication method in radio communication system
CN102415205B (en) * 2009-04-28 2017-07-28 三菱电机株式会社 mobile communication system
US9992790B2 (en) * 2015-07-20 2018-06-05 Qualcomm Incorporated Time division duplex (TDD) subframe structure supporting single and multiple interlace modes
CN106549885B (en) * 2015-12-31 2019-09-17 南方科技大学 Channel estimation method and system
US10285174B2 (en) * 2016-01-11 2019-05-07 Qualcomm Incorporated Uplink data channel design for narrowband devices
CN106101038A (en) * 2016-08-04 2016-11-09 成都极比特通信技术有限公司 Antenna structure based on filter bank multi-carrier system
CN111385074B (en) * 2018-12-28 2023-10-17 中兴通讯股份有限公司 Reference signal processing method and device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6067292A (en) * 1996-08-20 2000-05-23 Lucent Technologies Inc Pilot interference cancellation for a coherent wireless code division multiple access receiver
KR100318959B1 (en) * 1998-07-07 2002-04-22 윤종용 Apparatus and method for eliminating interference between different codes in a CDMA communication system
US6385264B1 (en) * 1999-06-08 2002-05-07 Qualcomm Incorporated Method and apparatus for mitigating interference between base stations in a wideband CDMA system

Also Published As

Publication number Publication date
CN1751489A (en) 2006-03-22
CN101610234B (en) 2012-04-25
CN1751489B (en) 2010-06-16
CN101610234A (en) 2009-12-23

Similar Documents

Publication Publication Date Title
IL169509A0 (en) Pilot transmission schemes for wireless multi-carrier communication systems
UA90244C2 (en) Pilot transmissions schemes for use in wireless multi-carrier communication systems
JP5166236B2 (en) Pilot signal transmission for orthogonal frequency division wireless communication systems
JP4902660B2 (en) Pilot symbol transmission in a wireless communication system
US20170134068A1 (en) Frequency hopping pattern and method for transmitting uplink signals using the same
TW200509578A (en) Fast frequency hopping with a code division multiplexed pilot in an OFDMA system
NO20082352L (en) Pilot signal transmission for an orthogonal frequency-shared system for wireless communication
WO2007084988A3 (en) Method and apparatus for pilot multiplexing in a wireless communication system
WO2007130011A8 (en) Method and system for processing reference signals in ofdm systems using transmission time interval groupings
DE60332893D1 (en) CDMA Reception Transmission Techniques for Radio Systems with Multiple Inputs and Multiple Outputs (MIMO)
MY172741A (en) Radio transmission system and method, and transmitter apparatus and receiver apparatus used in the radio transmission system
FI102577B1 (en) Transmission and reception procedure and radio system
UA86927C2 (en) Method and apparatus for data processing to transmit in a wireless system (embodiments), a transmitter in the wireless system and a wireless communication apparatus
WO2004075470A3 (en) Controlled superposition coding in multi-user communication systems
TW200620872A (en) Wireless communication system with improved broadcast coverage
TW200742318A (en) Method of transmitting pilot for multiple carrier system
DE60019282D1 (en) TIME AND FREQUENCY DIVERSITY IN FH / TDD SYSTEMS
TW200746734A (en) Method and apparatus for pilot multiplexing in a wireless communication system
RU2008100226A (en) BASE STATION, MOBILE STATION AND COMMUNICATION METHOD
CN101176287A (en) Transmission device, transmission method, reception device, and reception method
CN113647071A (en) Avoiding spectral lines for wake-up packet OOK signals
DE602005001509D1 (en) Reduction of channel allocation overhead in the downlink channel of a multicarrier system
UA88873C2 (en) Techniques and apparatuses for transmission and reception of pilot and data with fast frequency hopping with a code division multiplexed pilot in ofdma system
TW200642382A (en) Adaptive retransmission for frequency spreading
DE602005001863D1 (en) Reduction of channel allocation overhead in the downlink channel of a multicarrier system