FI20116245A - Konstellaatiomuokkaus OFDM:ää varten - Google Patents
Konstellaatiomuokkaus OFDM:ää varten Download PDFInfo
- Publication number
- FI20116245A FI20116245A FI20116245A FI20116245A FI20116245A FI 20116245 A FI20116245 A FI 20116245A FI 20116245 A FI20116245 A FI 20116245A FI 20116245 A FI20116245 A FI 20116245A FI 20116245 A FI20116245 A FI 20116245A
- Authority
- FI
- Finland
- Prior art keywords
- constellation
- ofdm
- editing
- constellation editing
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
- H04L27/3411—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
- H04L1/0042—Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2646—Arrangements specific to the transmitter only using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
- H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
- H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR2009/03651A TR200903651A1 (tr) | 2008-12-30 | 2009-05-11 | OFDM iletişimde kullanılan bir verici ve bu vericiye uygun olarak çalışan bir alıcı. |
PCT/IB2009/055565 WO2010076699A1 (en) | 2008-12-30 | 2009-12-08 | Demodulation of ofdm qam signals with channel estimation errors |
Publications (1)
Publication Number | Publication Date |
---|---|
FI20116245A true FI20116245A (fi) | 2011-12-08 |
Family
ID=42136245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI20116245A FI20116245A (fi) | 2009-05-11 | 2011-12-08 | Konstellaatiomuokkaus OFDM:ää varten |
Country Status (3)
Country | Link |
---|---|
FI (1) | FI20116245A (fi) |
SE (1) | SE1151055A1 (fi) |
WO (1) | WO2010131125A1 (fi) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108631879B (zh) * | 2018-05-14 | 2019-11-12 | 华侨大学 | 一种基于概率整形映射的光正交频分复用通信方法及*** |
US10785085B2 (en) | 2019-01-15 | 2020-09-22 | Nokia Technologies Oy | Probabilistic shaping for physical layer design |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6327314B1 (en) | 1998-04-01 | 2001-12-04 | At&T Corp. | Method and apparatus for channel estimation for multicarrier systems |
US7260055B2 (en) | 2003-05-30 | 2007-08-21 | Agency For Science, Technology, And Research | Method for reducing channel estimation error in an OFDM system |
-
2010
- 2010-01-25 SE SE1151055A patent/SE1151055A1/sv not_active Application Discontinuation
- 2010-01-25 WO PCT/IB2010/050303 patent/WO2010131125A1/en active Application Filing
-
2011
- 2011-12-08 FI FI20116245A patent/FI20116245A/fi not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
WO2010131125A1 (en) | 2010-11-18 |
SE1151055A1 (sv) | 2012-02-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD | Application lapsed |