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 PDFInfo
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
- H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
- H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0212—Channel estimation of impulse response
- H04L25/0214—Channel estimation of impulse response of a single coefficient
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
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.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34960997A JP3441638B2 (en) | 1997-12-18 | 1997-12-18 | Apparatus and method for determining channel estimate |
JP349609/1997 | 1997-12-18 | ||
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9564932B1 (en) | 2015-07-16 | 2017-02-07 | LGS Innovations LLC | Software defined radio front end |
-
1998
- 1998-12-17 CA CA002405295A patent/CA2405295C/en not_active Expired - Fee Related
Cited By (8)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2281676A1 (en) | Channel estimation unit, and cdma receiver and cdma transceiver with channel estimation unit | |
CA2278299A1 (en) | Channel estimating apparatus, and cdma receiver and cdma transceiver each having the apparatus | |
US7782815B2 (en) | Method for transmitting an information of a mobile telecommunication system | |
EP0849886A3 (en) | Multistage interference canceller for a code division multiple access communications system | |
US7440487B2 (en) | Method and system of transmitting words representing transmission parameters respectively allocated to mobile stations communicating with a base station in a mobile communication system | |
EP1063780A3 (en) | Spread spectrum channel estimation sequences | |
AU6997798A (en) | Multipath search processor for a spread spectrum multiple access communication system | |
EP1686697A3 (en) | Reverse link correlation filter in multi rate CDMA wireless communication systems | |
EP0661829A3 (en) | Direct sequence spread spectrum receiver using pilot signal averaged over a fixed moving time interval | |
MY113224A (en) | Cell site demodulator architecture for a spread spectrum multiple access communication system | |
WO1999022454A3 (en) | Estimation of transmission channels in communication systems for wireless telecommunication | |
AU6243399A (en) | Adaptive weighting method for orthogonal frequency division multiplexed soft symbols using channel state information estimates | |
KR960705415A (en) | A method and apparatus for identifying a coded communication signal | |
AU2765801A (en) | Channel estimation for time division duplex communication systems | |
BR0001674A (en) | Method to eliminate lateral lobes in a communication channel, method to establish a communication channel, method to generate pilot signals, communication link and correlator circuit | |
EP0913971A3 (en) | Channel Estimation in a CDMA cellular communication system | |
EP1142153A1 (en) | Channel estimation in a cellular communication system | |
EP0963056A3 (en) | Reception apparatus for multipath signals in DS-CDMA | |
CA2307490A1 (en) | Control channel for time division multiple access systems | |
CA2405295A1 (en) | Channel estimation unit, and cdma receiver and cdma transceiver with channel estimation unit | |
EP1128568A3 (en) | Spectrum spread communication synchronization apparatus using frequency offset | |
CN1917487B (en) | Assignment method of training sequence in use for sub time slot sytem | |
KR100339337B1 (en) | Frame synchronization apparatus and method using optimal pilot pattern | |
WO2000045138A3 (en) | Dsss receiver |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20131217 |