GB2431322B - Communications system - Google Patents
Communications systemInfo
- Publication number
- GB2431322B GB2431322B GB0521056A GB0521056A GB2431322B GB 2431322 B GB2431322 B GB 2431322B GB 0521056 A GB0521056 A GB 0521056A GB 0521056 A GB0521056 A GB 0521056A GB 2431322 B GB2431322 B GB 2431322B
- Authority
- GB
- United Kingdom
- Prior art keywords
- communications system
- communications
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- H04L27/2647—Arrangements specific to the receiver only
-
- 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
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
-
- 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
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
- H04L27/3827—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using only the demodulated baseband signals
-
- 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
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
- H04L27/3863—Compensation for quadrature error in the received signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0016—Stabilisation of local oscillators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
-
- 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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
- H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
- H04L25/0307—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure using blind adaptation
-
- 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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0521056A GB2431322B (en) | 2005-10-17 | 2005-10-17 | Communications system |
PCT/GB2006/003837 WO2007045843A2 (en) | 2005-10-17 | 2006-10-17 | Correction of quadrature mismatch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0521056A GB2431322B (en) | 2005-10-17 | 2005-10-17 | Communications system |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0521056D0 GB0521056D0 (en) | 2005-11-23 |
GB2431322A GB2431322A (en) | 2007-04-18 |
GB2431322B true GB2431322B (en) | 2008-03-26 |
Family
ID=35451864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0521056A Expired - Fee Related GB2431322B (en) | 2005-10-17 | 2005-10-17 | Communications system |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2431322B (en) |
WO (1) | WO2007045843A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2509303A (en) | 2012-11-08 | 2014-07-02 | Miller Int Ltd | Coupler |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5548582A (en) * | 1993-12-22 | 1996-08-20 | U.S. Philips Corporation | Multicarrier frequency hopping communications system |
US6442217B1 (en) * | 2000-05-22 | 2002-08-27 | Sicom, Inc. | Digital communication receiver with digital, IF, I-Q balancer |
US20030231726A1 (en) * | 2002-06-12 | 2003-12-18 | Andreas Schuchert | Arrangement and method for frequency domain compensation of OFDM signals with IQ imbalance |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1665693A1 (en) * | 2003-09-15 | 2006-06-07 | Intel Corporation | Adaptive iq imbalance correction for multicarrier wireless communication systems |
-
2005
- 2005-10-17 GB GB0521056A patent/GB2431322B/en not_active Expired - Fee Related
-
2006
- 2006-10-17 WO PCT/GB2006/003837 patent/WO2007045843A2/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5548582A (en) * | 1993-12-22 | 1996-08-20 | U.S. Philips Corporation | Multicarrier frequency hopping communications system |
US6442217B1 (en) * | 2000-05-22 | 2002-08-27 | Sicom, Inc. | Digital communication receiver with digital, IF, I-Q balancer |
US20030231726A1 (en) * | 2002-06-12 | 2003-12-18 | Andreas Schuchert | Arrangement and method for frequency domain compensation of OFDM signals with IQ imbalance |
Also Published As
Publication number | Publication date |
---|---|
WO2007045843A8 (en) | 2007-08-23 |
GB2431322A (en) | 2007-04-18 |
WO2007045843A2 (en) | 2007-04-26 |
WO2007045843A3 (en) | 2007-07-12 |
GB0521056D0 (en) | 2005-11-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20131017 |