UA90133C2 - Pilot-signal transmission and channel estimation for a frequency division multiplexing communication system - Google Patents
Pilot-signal transmission and channel estimation for a frequency division multiplexing communication systemInfo
- Publication number
- UA90133C2 UA90133C2 UAA200710986A UAA200710986A UA90133C2 UA 90133 C2 UA90133 C2 UA 90133C2 UA A200710986 A UAA200710986 A UA A200710986A UA A200710986 A UAA200710986 A UA A200710986A UA 90133 C2 UA90133 C2 UA 90133C2
- Authority
- UA
- Ukraine
- Prior art keywords
- pilot
- sequence
- symbols
- symbol
- channel estimation
- Prior art date
Links
Abstract
A transmitter generates a pilot having a constant time-domain envelope and a flat frequency spectrum based on a polyphase sequence. To generate a pilot IFDMA symbol, a first sequence of pilot symbols is formed based on the polyphase sequence and replicated multiple times to obtain a second sequence of pilot symbols. A phase ramp is applied to the second pilot symbol sequence to obtain a third sequence of output symbols. A cyclic prefix is appended to the third sequence of output symbols to obtain an IFDMA symbol, which is transmitted in the time domain via a communication channel. The pilot symbols may be multiplexed with data symbols using TDM and/or CDM. A pilot LFDMA symbol may also be generated with a polyphase sequence and multiplexed using TDM or CDM. A receiver derives a channel estimate based on received pilot symbols and using minimum mean-square error, least-squares, or some other channel estimation technique.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US65952605P | 2005-03-07 | 2005-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
UA90133C2 true UA90133C2 (en) | 2010-04-12 |
Family
ID=39567892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
UAA200710986A UA90133C2 (en) | 2005-03-07 | 2006-03-07 | Pilot-signal transmission and channel estimation for a frequency division multiplexing communication system |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN101208874A (en) |
UA (1) | UA90133C2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8509325B2 (en) * | 2008-07-01 | 2013-08-13 | Qualcomm Incorporated | Adaptive thresholding for OFDM channel estimation |
US8730933B2 (en) | 2008-09-18 | 2014-05-20 | Qualcomm Incorporated | Method and apparatus for multiplexing data and reference signal in a wireless communication system |
US8804859B2 (en) * | 2009-02-23 | 2014-08-12 | Mediatek, Inc. | Methods and apparatuses for dealing with spectrum inversion |
US9288026B2 (en) | 2009-06-22 | 2016-03-15 | Qualcomm Incorporated | Transmission of reference signal on non-contiguous clusters of resources |
US10567205B2 (en) * | 2017-01-26 | 2020-02-18 | Qualcomm Incorporated | Frequency and time domain multiplexing for low peak-to-average power ratio (PAPR) waveform design with multiple streams |
CN107819558B (en) * | 2017-10-31 | 2020-04-28 | 清华大学 | Multi-address access data packet transmission method |
CN109246039B (en) * | 2018-08-09 | 2020-11-24 | 华南理工大学 | Soft information iteration receiving method based on bidirectional time domain equalization |
-
2006
- 2006-03-07 UA UAA200710986A patent/UA90133C2/en unknown
- 2006-03-07 CN CNA2006800121090A patent/CN101208874A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN101208874A (en) | 2008-06-25 |
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