WO2004004193A3 - Improving hierarchical 8psk performance - Google Patents

Improving hierarchical 8psk performance Download PDF

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Publication number
WO2004004193A3
WO2004004193A3 PCT/US2003/020862 US0320862W WO2004004193A3 WO 2004004193 A3 WO2004004193 A3 WO 2004004193A3 US 0320862 W US0320862 W US 0320862W WO 2004004193 A3 WO2004004193 A3 WO 2004004193A3
Authority
WO
WIPO (PCT)
Prior art keywords
modulation
symbols
hierarchical level
modulated signal
signal
Prior art date
Application number
PCT/US2003/020862
Other languages
French (fr)
Other versions
WO2004004193A2 (en
Inventor
Ernest C Chen
Joseph Santoru
Original Assignee
Directv Group Inc
Ernest C Chen
Joseph Santoru
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 Directv Group Inc, Ernest C Chen, Joseph Santoru filed Critical Directv Group Inc
Priority to CA2489569A priority Critical patent/CA2489569C/en
Priority to EP03742400A priority patent/EP1540909A4/en
Priority to US10/519,322 priority patent/US7418060B2/en
Priority to AU2003280499A priority patent/AU2003280499A1/en
Publication of WO2004004193A2 publication Critical patent/WO2004004193A2/en
Priority to NO20040663A priority patent/NO338177B1/en
Priority to IL165765A priority patent/IL165765A/en
Publication of WO2004004193A3 publication Critical patent/WO2004004193A3/en
Priority to US12/176,533 priority patent/US7577213B2/en

Links

Classifications

    • 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/208—Arrangements for detecting or preventing errors in the information received using signal quality detector involving signal re-encoding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/183—Multiresolution systems
    • 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
    • H04L2001/0098—Unequal error protection

Abstract

A method and receiver systems for demodulating and decoding a hierarchically modulated signal, e.g. an 8PSK signal, are disclosed. An exemplary method includes demodulating and processing (502) the hierarchically modulated signal (202) to produce symbols (212) from the first modulation at the first hierarchical level, applying information (504) from a plurality of the symbols from the first modulation at the first hierarchical level in subtracting (214) from the demodulated hierarchically modulated signal to obtain the second modulation at the second hierarchical level and processing (506) the second modulation at the second hierarchical level to produce second symbols (222) from the demodulated second signal. The hierarchically modulated signal comprises a non-uniform 8PSK signal. Applying the information from the plurality of the symbols from the first modulation can be achieved by applying the symbols after error correction. A decision-directed demodulation of the first modulation can also be used to further improve performance.
PCT/US2003/020862 2002-07-01 2003-07-01 Improving hierarchical 8psk performance WO2004004193A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CA2489569A CA2489569C (en) 2002-07-01 2003-07-01 Improving hierarchical 8psk performance
EP03742400A EP1540909A4 (en) 2002-07-01 2003-07-01 Improving hierarchical 8psk performance
US10/519,322 US7418060B2 (en) 2002-07-01 2003-07-01 Improving hierarchical 8PSK performance
AU2003280499A AU2003280499A1 (en) 2002-07-01 2003-07-01 Improving hierarchical 8psk performance
NO20040663A NO338177B1 (en) 2002-07-01 2004-02-16 Method and system for demodulation and decoding of a hierarchically modulated signal.
IL165765A IL165765A (en) 2002-07-01 2004-12-14 Method of improving hierarchical 8psk performance
US12/176,533 US7577213B2 (en) 2002-07-01 2008-07-21 Hierarchical 8PSK performance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39286102P 2002-07-01 2002-07-01
US60/392,861 2002-07-01

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US10519322 A-371-Of-International 2003-07-01
US12/176,533 Continuation US7577213B2 (en) 2002-07-01 2008-07-21 Hierarchical 8PSK performance

Publications (2)

Publication Number Publication Date
WO2004004193A2 WO2004004193A2 (en) 2004-01-08
WO2004004193A3 true WO2004004193A3 (en) 2005-01-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/020862 WO2004004193A2 (en) 2002-07-01 2003-07-01 Improving hierarchical 8psk performance

Country Status (9)

Country Link
US (2) US7418060B2 (en)
EP (1) EP1540909A4 (en)
AR (1) AR040366A1 (en)
AU (1) AU2003280499A1 (en)
CA (1) CA2489569C (en)
IL (1) IL165765A (en)
NO (1) NO338177B1 (en)
TW (1) TWI324463B (en)
WO (1) WO2004004193A2 (en)

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