AR011875A1 - Circuito de deteccion de servicio - Google Patents

Circuito de deteccion de servicio

Info

Publication number
AR011875A1
AR011875A1 ARP980100848A ARP980100848A AR011875A1 AR 011875 A1 AR011875 A1 AR 011875A1 AR P980100848 A ARP980100848 A AR P980100848A AR P980100848 A ARP980100848 A AR P980100848A AR 011875 A1 AR011875 A1 AR 011875A1
Authority
AR
Argentina
Prior art keywords
energy
detection circuit
service
autocorrelation
cdma signal
Prior art date
Application number
ARP980100848A
Other languages
English (en)
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of AR011875A1 publication Critical patent/AR011875A1/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Un radioteléfono (121) emplea un circuito de deteccion de servicio (125) que comprende al menos un detector de velocidad de chips (109) que mide laenergía de la autocorrelacion de una senal de CDMA compuesta recibida y emplea un retardodiferente para cada medicion de la energía. Un circuito de deteccionde umbral (127) combina las energías medidas y determina que el servicio está disponible si las energías combinadas exceden el umbral y de lo contrario,determina que el serviciono está dis ponible. Los detectores de velocidades de chips (109) pueden conectarse en paralelo para proporcionar medicionessimultáneas de la energía de la autocorrelacion de la senal de CDMA compuesta recibida, o un solo detector de velocidadde chips (10 9) puede medir en seriela energía de la autocorrelacion de la senal de CDMA compuesta recibida.
ARP980100848A 1997-02-28 1998-02-25 Circuito de deteccion de servicio AR011875A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/808,446 US5974042A (en) 1997-02-28 1997-02-28 Service detection circuit and method

Publications (1)

Publication Number Publication Date
AR011875A1 true AR011875A1 (es) 2000-09-13

Family

ID=25198779

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP980100848A AR011875A1 (es) 1997-02-28 1998-02-25 Circuito de deteccion de servicio

Country Status (14)

Country Link
US (1) US5974042A (es)
JP (1) JP3031615B2 (es)
KR (1) KR100321457B1 (es)
CN (1) CN1117503C (es)
AR (1) AR011875A1 (es)
BR (1) BR9805111A (es)
DE (1) DE19806684C2 (es)
FR (1) FR2760303B1 (es)
GB (1) GB2323501B (es)
HU (1) HU220726B1 (es)
MX (1) MX9801612A (es)
PL (1) PL187735B1 (es)
RU (1) RU2212762C2 (es)
ZA (1) ZA9836B (es)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3202658B2 (ja) * 1997-06-20 2001-08-27 日本電気株式会社 可変レートｃｄｍａ送信電力制御方式
US6553010B1 (en) * 1998-10-16 2003-04-22 Telefonaktiebolaget L M Ericsson Coverage detection and indication in multimedia radiocommunication system
US6317411B1 (en) * 1999-02-22 2001-11-13 Motorola, Inc. Method and system for transmitting and receiving signals transmitted from an antenna array with transmit diversity techniques
JP3438701B2 (ja) 2000-06-09 2003-08-18 日本電気株式会社 Ｄｓ−ｃｄｍａシステムにおける受信パスタイミング検出回路
US6778838B1 (en) * 2000-10-11 2004-08-17 Ericsson Inc. Phase null mitigation method
JP3851525B2 (ja) * 2001-08-09 2006-11-29 株式会社エヌ・ティ・ティ・ドコモ 移動局装置、移動通信システムおよびキャリア検出方法
GB2396275B (en) * 2002-12-09 2006-03-15 Ipwireless Inc Support of plural chip rates in a CDMA system
US20070092045A1 (en) * 2005-10-21 2007-04-26 Wangmyong Woo Systems, Methods, and Apparatuses for Fine-Sensing Modules
US7710919B2 (en) * 2005-10-21 2010-05-04 Samsung Electro-Mechanics Systems, methods, and apparatuses for spectrum-sensing cognitive radios
US7668262B2 (en) * 2005-10-21 2010-02-23 Samsung Electro-Mechanics Systems, methods, and apparatuses for coarse spectrum-sensing modules
US7528751B2 (en) * 2006-07-28 2009-05-05 Samsung Electro-Mechanics Systems, methods, and apparatuses for a long delay generation technique for spectrum-sensing of cognitive radios
US7860197B2 (en) * 2006-09-29 2010-12-28 Samsung Electro-Mechanics Spectrum-sensing algorithms and methods
JP5239529B2 (ja) * 2008-06-10 2013-07-17 富士通セミコンダクター株式会社 同期検出器及び通信機器
US8908546B2 (en) * 2008-09-04 2014-12-09 Koninklijke Philips N.V. Distributed spectrum sensing
US8055222B2 (en) * 2008-12-16 2011-11-08 Motorola Mobility, Inc. Multiple protocol signal detector
US9362979B2 (en) * 2011-01-04 2016-06-07 ABG Tag & Traq, LLC Ultra wideband time-delayed correlator
US8676147B1 (en) * 2012-11-30 2014-03-18 The Aerospace Corporation Detection system, controller, and method of detecting a signal of interest
CN105157899A (zh) * 2015-08-19 2015-12-16 南京工程学院 互反向含噪拟方波最大绝对值的搜索方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146471A (en) * 1989-03-23 1992-09-08 Echelon Systems Corporation Correlator for spread spectrum communications systems
US5063572A (en) * 1990-06-04 1991-11-05 Unisys Corporation Channelized delay and mix chip rate detector
US5157688A (en) * 1991-03-14 1992-10-20 Hughes Aircraft Company Spread spectrum transmitter for degrading spread spectrum feature detectors
US5341396A (en) * 1993-03-02 1994-08-23 The Boeing Company Multi-rate spread system
FR2710214B1 (fr) * 1993-09-15 1995-10-20 Alcatel Mobile Comm France Détecteur à seuil pour système de transmission radionumérique, dispositifs comprenant un tel détecteur à seuil et utilisation correspondante.
CA2151737C (en) * 1993-10-14 1999-09-28 Tomohiro Dohi Correlation detector and communication apparatus
US5680414A (en) * 1994-09-09 1997-10-21 Omnipoint Corporation Synchronization apparatus and method for spread spectrum receiver
FR2733113B1 (fr) * 1995-04-14 1997-06-13 Europ Agence Spatiale Recepteur de signal a spectre etale
US5978679A (en) * 1996-02-23 1999-11-02 Qualcomm Inc. Coexisting GSM and CDMA wireless telecommunications networks
US5950131A (en) * 1996-10-29 1999-09-07 Motorola, Inc. Method and apparatus for fast pilot channel acquisition using a matched filter in a CDMA radiotelephone

Also Published As

Publication number Publication date
HUP9800431A3 (en) 2000-02-28
KR100321457B1 (ko) 2002-03-08
RU2212762C2 (ru) 2003-09-20
MX9801612A (es) 1998-11-30
GB9801291D0 (en) 1998-03-18
GB2323501B (en) 2001-08-22
KR19980070532A (ko) 1998-10-26
JP3031615B2 (ja) 2000-04-10
PL325086A1 (en) 1998-08-31
GB2323501A (en) 1998-09-23
US5974042A (en) 1999-10-26
FR2760303A1 (fr) 1998-09-04
CN1213260A (zh) 1999-04-07
DE19806684A1 (de) 1998-09-10
CN1117503C (zh) 2003-08-06
PL187735B1 (pl) 2004-09-30
FR2760303B1 (fr) 2003-04-18
BR9805111A (pt) 1999-12-14
HUP9800431A2 (hu) 1998-10-28
DE19806684C2 (de) 2002-05-23
HU220726B1 (hu) 2002-05-28
JPH10256942A (ja) 1998-09-25
ZA9836B (en) 1998-07-07

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