TWI319939B - Maximizing power and spectral efficiencies for layered and conventional modulations - Google Patents

Maximizing power and spectral efficiencies for layered and conventional modulations

Info

Publication number
TWI319939B
TWI319939B TW092129644A TW92129644A TWI319939B TW I319939 B TWI319939 B TW I319939B TW 092129644 A TW092129644 A TW 092129644A TW 92129644 A TW92129644 A TW 92129644A TW I319939 B TWI319939 B TW I319939B
Authority
TW
Taiwan
Prior art keywords
signal
layered modulation
layered
spectral efficiencies
layer signal
Prior art date
Application number
TW092129644A
Other languages
Chinese (zh)
Other versions
TW200419979A (en
Inventor
Chen Ernest
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 US09/844,401 external-priority patent/US7209524B2/en
Application filed filed Critical
Publication of TW200419979A publication Critical patent/TW200419979A/en
Application granted granted Critical
Publication of TWI319939B publication Critical patent/TWI319939B/en

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
    • H04L27/3488—Multiresolution systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18515—Transmission equipment in satellites or space-based relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/42—Arrangements for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/71—Wireless systems
    • H04H20/74—Wireless systems of satellite networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

Methods and apparatuses for maximizing power and spectral efficiencies in a wireless communication system are disclosed. The invention is particularly useful for layered modulation applications because power levels for such applications a re relatively high. A layered modulation signal comprises an upper and a lower layer signal that interfere with each other within the same frequency band such th at the upper layer signal can be demodulated directly from the layered modulation signal, and the lower layer signal can be demodulated after subtracting the first layer signal from the layered modulation signal. The invention applies one or more of the following four signal schemes in a communication signal including varying th e symbol rate (rather than the code rate), reducing or eliminating the guard band, reducing excess signal bandwidth and employing layered modulation within the guard band of the legacy signal.
TW092129644A 2001-04-27 2003-10-24 Maximizing power and spectral efficiencies for layered and conventional modulations TWI319939B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/844,401 US7209524B2 (en) 2001-04-27 2001-04-27 Layered modulation for digital signals
US42128802P 2002-10-25 2002-10-25

Publications (2)

Publication Number Publication Date
TW200419979A TW200419979A (en) 2004-10-01
TWI319939B true TWI319939B (en) 2010-01-21

Family

ID=32599985

Family Applications (1)

Application Number Title Priority Date Filing Date
TW092129644A TWI319939B (en) 2001-04-27 2003-10-24 Maximizing power and spectral efficiencies for layered and conventional modulations

Country Status (2)

Country Link
TW (1) TWI319939B (en)
WO (1) WO2004040897A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2166722A1 (en) * 2008-09-18 2010-03-24 Thomson Licensing A hierarchical quadrature (QAM) transmission scheme
CN109525519A (en) * 2017-09-19 2019-03-26 晨星半导体股份有限公司 Symbol rate estimation device, symbol rate estimating method and adjacent channel interference detecting apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3139909B2 (en) * 1994-03-15 2001-03-05 株式会社東芝 Hierarchical orthogonal frequency multiplexing transmission system and transmitting / receiving apparatus
US5966412A (en) 1997-06-30 1999-10-12 Thomson Consumer Electronics, Inc. Apparatus and method for processing a Quadrature Amplitude Modulated (QAM) signal
JP2002164866A (en) * 2000-11-29 2002-06-07 Nec Corp Broadcasting device using ofdm modulation method
US7203158B2 (en) * 2000-12-06 2007-04-10 Matsushita Electric Industrial Co., Ltd. OFDM signal transmission system, portable terminal, and e-commerce system

Also Published As

Publication number Publication date
WO2004040897A2 (en) 2004-05-13
WO2004040897A3 (en) 2004-07-01
TW200419979A (en) 2004-10-01

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Legal Events

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MM4A Annulment or lapse of patent due to non-payment of fees