UA90244C2 - Pilot transmissions schemes for use in wireless multi-carrier communication systems - Google Patents
Pilot transmissions schemes for use in wireless multi-carrier communication systemsInfo
- 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
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.
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) | CN101610234B (en) |
UA (1) | UA90244C2 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008033117A1 (en) * | 2006-09-11 | 2008-03-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Detection of time-frequency hopping patterns |
EP2070281A1 (en) * | 2006-09-29 | 2009-06-17 | 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 transmitting and receiving system and method for distinguishing cell utilizing 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 |
KR101307630B1 (en) * | 2009-03-23 | 2013-09-12 | 후지쯔 가부시끼가이샤 | Radio communication system, base station device, terminal, and radio communication method in radio communication system |
EP4290933A3 (en) * | 2009-04-28 | 2024-02-28 | Mitsubishi Electric Corporation | Mobile transmission system, base station and mobile terminal |
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 methods 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)
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 |
-
2004
- 2004-01-07 CN CN2009101395182A patent/CN101610234B/en not_active Expired - Lifetime
- 2004-01-07 UA UAA200507804A patent/UA90244C2/en unknown
- 2004-01-07 CN CN200480004741.1A patent/CN1751489B/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN101610234B (en) | 2012-04-25 |
CN101610234A (en) | 2009-12-23 |
CN1751489B (en) | 2010-06-16 |
CN1751489A (en) | 2006-03-22 |
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