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 system

Info

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
Application number
UAA200710986A
Other languages
Russian (ru)
Ukrainian (uk)
Inventor
Ravi Palanki
Aamod Khandekar
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 UA90133C2 publication Critical patent/UA90133C2/en

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.
UAA200710986A 2005-03-07 2006-03-07 Pilot-signal transmission and channel estimation for a frequency division multiplexing communication system UA90133C2 (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CN101208874A (en) 2008-06-25

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