GB2358773B - Power consumption reducing method for a wireless communication apparatus - Google Patents

Power consumption reducing method for a wireless communication apparatus

Info

Publication number
GB2358773B
GB2358773B GB0108881A GB0108881A GB2358773B GB 2358773 B GB2358773 B GB 2358773B GB 0108881 A GB0108881 A GB 0108881A GB 0108881 A GB0108881 A GB 0108881A GB 2358773 B GB2358773 B GB 2358773B
Authority
GB
United Kingdom
Prior art keywords
communication apparatus
receiving circuits
reception signals
wireless communication
power consumption
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
Application number
GB0108881A
Other versions
GB2358773A (en
GB0108881D0 (en
Inventor
Motoyasu Taguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
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 JP31186798A external-priority patent/JP3199039B2/en
Application filed by NEC Corp filed Critical NEC Corp
Publication of GB0108881D0 publication Critical patent/GB0108881D0/en
Publication of GB2358773A publication Critical patent/GB2358773A/en
Application granted granted Critical
Publication of GB2358773B publication Critical patent/GB2358773B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • 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

In a CDMA communication apparatus, two receiving circuits 2-1, 2-2 demodulate signals received by respective antennas 1-1, 1-2 and output reception signals. Two delay profile circuits 3-1, 3-2 associated with the receiving circuits shift the phases of the reception signals from the receiving circuits every predetermined interval, and correlate the reception signals with respect to known data to thereby output correlation value data. A searcher circuit 4 retrieves peaks from at least two correlation value data derived from the delay profile circuit and compares them. The power supply to at least one of the receiving circuits is then disconnected by switches 7-1, 7-2 and the oscillation frequency of a clock in the communication apparatus is reduced based on this comparison.
GB0108881A 1998-11-02 1999-11-01 Power consumption reducing method for a wireless communication apparatus Expired - Fee Related GB2358773B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP31186798A JP3199039B2 (en) 1998-11-02 1998-11-02 Power consumption reduction circuit, wireless communication device using the same, and power consumption reduction method in wireless communication device
GB9925861A GB2345416B (en) 1998-11-02 1999-11-01 Wireless communication apparatus and power consumption reducing method thereof

Publications (3)

Publication Number Publication Date
GB0108881D0 GB0108881D0 (en) 2001-05-30
GB2358773A GB2358773A (en) 2001-08-01
GB2358773B true GB2358773B (en) 2002-03-20

Family

ID=26316046

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0108881A Expired - Fee Related GB2358773B (en) 1998-11-02 1999-11-01 Power consumption reducing method for a wireless communication apparatus

Country Status (1)

Country Link
GB (1) GB2358773B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101567997B (en) * 2005-08-24 2012-06-27 汤姆森特许公司 Method and apparatus for providing channel history

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0500326A2 (en) * 1991-02-22 1992-08-26 Nec Corporation Digital mobile communication terminal equipment and receiving method therefor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0500326A2 (en) * 1991-02-22 1992-08-26 Nec Corporation Digital mobile communication terminal equipment and receiving method therefor

Also Published As

Publication number Publication date
GB2358773A (en) 2001-08-01
GB0108881D0 (en) 2001-05-30

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20141023 AND 20141029

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20161101