CA2405295A1 - Channel estimation unit, and cdma receiver and cdma transceiver with channel estimation unit - Google Patents

Channel estimation unit, and cdma receiver and cdma transceiver with channel estimation unit Download PDF

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Publication number
CA2405295A1
CA2405295A1 CA002405295A CA2405295A CA2405295A1 CA 2405295 A1 CA2405295 A1 CA 2405295A1 CA 002405295 A CA002405295 A CA 002405295A CA 2405295 A CA2405295 A CA 2405295A CA 2405295 A1 CA2405295 A1 CA 2405295A1
Authority
CA
Canada
Prior art keywords
channel estimation
estimation unit
symbols
pilot
cdma
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002405295A
Other languages
French (fr)
Other versions
CA2405295C (en
Inventor
Sadayuki Abeta
Mamoru Sawahashi
Fumiyuki Adachi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
Original Assignee
Sadayuki Abeta
Mamoru Sawahashi
Fumiyuki Adachi
Ntt Mobile Communications Network Inc.
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
Priority claimed from JP34960997A external-priority patent/JP3441638B2/en
Application filed by Sadayuki Abeta, Mamoru Sawahashi, Fumiyuki Adachi, Ntt Mobile Communications Network Inc. filed Critical Sadayuki Abeta
Publication of CA2405295A1 publication Critical patent/CA2405295A1/en
Application granted granted Critical
Publication of CA2405295C publication Critical patent/CA2405295C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0224Channel estimation using sounding signals
    • H04L25/0228Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0232Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0212Channel estimation of impulse response
    • H04L25/0214Channel estimation of impulse response of a single coefficient

Abstract

There are provided a channel estimation unit for achieving highly accurate channel estimation, a CDMA receiver and a CDMA transceiver with the channel estimation unit. Channel estimates of data symbols are obtained from pilot symbols in a combined symbol sequence which has a plurality of slots and includes the data symbols and the pilot symbols. First, the pilot symbols in the combined symbol sequence are located. Second, pilot blocks are generated by extracting the pilot symbols from two or more slots in the combined symbol sequence. Third, channel estimates of the data symbols are obtained by calculating a weighted sum of averages of the pilot, symbols in the individual pilot blocks. The weighted sum is carried out using appropriate weighting factors for individual data symbols in each slot. This enables highly accurate channel estimation.
CA002405295A 1997-12-18 1998-12-17 Channel estimation unit, and cdma receiver and cdma transceiver with channel estimation unit Expired - Fee Related CA2405295C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP349609/1997 1997-12-18
JP34960997A JP3441638B2 (en) 1997-12-18 1997-12-18 Apparatus and method for determining channel estimate
CA 2281676 CA2281676C (en) 1997-12-18 1998-12-17 Channel estimation unit, and cdma receiver and cdma transceiver with channel estimation unit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA 2281676 Division CA2281676C (en) 1997-12-18 1998-12-17 Channel estimation unit, and cdma receiver and cdma transceiver with channel estimation unit

Publications (2)

Publication Number Publication Date
CA2405295A1 true CA2405295A1 (en) 1999-06-24
CA2405295C CA2405295C (en) 2008-02-19

Family

ID=39106256

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002405295A Expired - Fee Related CA2405295C (en) 1997-12-18 1998-12-17 Channel estimation unit, and cdma receiver and cdma transceiver with channel estimation unit

Country Status (1)

Country Link
CA (1) CA2405295C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9564932B1 (en) 2015-07-16 2017-02-07 LGS Innovations LLC Software defined radio front end

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9564932B1 (en) 2015-07-16 2017-02-07 LGS Innovations LLC Software defined radio front end
US9647705B2 (en) 2015-07-16 2017-05-09 LGS Innovations LLC Digital self-interference residual cancellation
US9660674B2 (en) 2015-07-16 2017-05-23 LGS Innovations LLC Self-interference cancellation antenna systems and methods
US9787460B2 (en) 2015-07-16 2017-10-10 LGS Innovations LLC Self-interference channel estimation system and method
US10090989B2 (en) 2015-07-16 2018-10-02 LGS Innovations LLC Software defined radio front end
US10164756B2 (en) 2015-07-16 2018-12-25 LGS Innovations LLC Self-interference cancellation antenna systems and methods
US10574428B2 (en) 2015-07-16 2020-02-25 LGS Innovations LLC Self-interference channel estimation system and method
US10594469B2 (en) 2015-07-16 2020-03-17 LGS Innovations LLC Secure radio methods and apparatus

Also Published As

Publication number Publication date
CA2405295C (en) 2008-02-19

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Effective date: 20131217