TW385599B - Method and apparatus for converting a wideband if signal to a complex (quadrature) baseband signal - Google Patents

Method and apparatus for converting a wideband if signal to a complex (quadrature) baseband signal Download PDF

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Publication number
TW385599B
TW385599B TW087111632A TW87111632A TW385599B TW 385599 B TW385599 B TW 385599B TW 087111632 A TW087111632 A TW 087111632A TW 87111632 A TW87111632 A TW 87111632A TW 385599 B TW385599 B TW 385599B
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TW
Taiwan
Prior art keywords
signal
normalized
components
item
patent application
Prior art date
Application number
TW087111632A
Other languages
English (en)
Chinese (zh)
Inventor
Paul W Dent
Rajaram Ramesh
Gregory E Bottomley
Richard H Myers
Original Assignee
Ericsson 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 Ericsson Inc filed Critical Ericsson Inc
Application granted granted Critical
Publication of TW385599B publication Critical patent/TW385599B/zh

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • 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
    • H04B7/0837—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 pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/009—Compensating quadrature phase or amplitude imbalances
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • 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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2335—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal
    • H04L27/2337—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal using digital techniques to measure the time between zero-crossings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Circuits Of Receivers In General (AREA)
  • Selective Calling Equipment (AREA)
  • Toys (AREA)
  • Superheterodyne Receivers (AREA)
TW087111632A 1997-07-24 1998-07-17 Method and apparatus for converting a wideband if signal to a complex (quadrature) baseband signal TW385599B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/899,879 US6195399B1 (en) 1994-03-28 1997-07-24 Method and apparatus for converting a wideband if signal to a complex (quadrature) baseband signal

Publications (1)

Publication Number Publication Date
TW385599B true TW385599B (en) 2000-03-21

Family

ID=25411686

Family Applications (1)

Application Number Title Priority Date Filing Date
TW087111632A TW385599B (en) 1997-07-24 1998-07-17 Method and apparatus for converting a wideband if signal to a complex (quadrature) baseband signal

Country Status (13)

Country Link
US (1) US6195399B1 (enExample)
EP (1) EP0998783B1 (enExample)
JP (1) JP4108922B2 (enExample)
KR (1) KR20010022197A (enExample)
CN (1) CN1111944C (enExample)
AR (1) AR018998A1 (enExample)
AU (1) AU746287B2 (enExample)
CA (1) CA2297734A1 (enExample)
DE (1) DE69802096T2 (enExample)
ES (1) ES2166170T3 (enExample)
TW (1) TW385599B (enExample)
WO (1) WO1999005781A1 (enExample)
ZA (1) ZA986430B (enExample)

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US6771721B1 (en) * 1997-06-20 2004-08-03 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for eliminating audio clicks in a radio receiver
US7130332B1 (en) * 1999-04-20 2006-10-31 Symmetricom, Inc. Pilot tracking for synchronization using correlation between digital signal and locally generated version of PN signal
US6823169B2 (en) * 1999-05-25 2004-11-23 Xm Satellite Radio, Inc. Low cost interoperable satellite digital audio radio service (SDARS) receiver architecture
US6934344B2 (en) * 2000-03-27 2005-08-23 Interdigital Technology Corporation Digital automatic gain control
SG111094A1 (en) * 2002-12-05 2005-05-30 Oki Techno Ct Singapore Pte Digital receiver
US7133655B2 (en) * 2004-03-23 2006-11-07 Broadcom Corporation Amplifiers and amplifying methods for use in telecommunications devices
DE102007024013B8 (de) * 2007-05-22 2009-04-16 Atmel Germany Gmbh Signalverarbeitungsvorrichtung und Signalverarbeitungsverfahren
ITMI20110756A1 (it) 2011-05-05 2012-11-06 S Di G Moiraghi & C Soc Sa Ricevitore di segnali in radiofrequenza.
CN102497216B (zh) * 2011-12-02 2014-08-13 中国科学院微电子研究所 一种可配置的接收信号强度指示电路
US10356743B2 (en) 2016-08-05 2019-07-16 Neonic Corporation System and method for wireless location
US10469112B2 (en) * 2017-05-31 2019-11-05 Silicon Laboratories Inc. System, apparatus and method for performing automatic gain control in a receiver for a packet-based protocol
CN108234046B (zh) * 2017-12-22 2021-06-15 Oppo广东移动通信有限公司 接收信号强度调整方法、装置、终端测试系统及电子终端
CN108199787B (zh) * 2017-12-22 2021-07-13 Oppo广东移动通信有限公司 发射功率调整方法、装置、终端测试系统及电子终端
CN108123762B (zh) * 2017-12-22 2021-06-15 Oppo广东移动通信有限公司 发射功率测试方法、装置、系统以及电子设备
CN107896131B (zh) * 2017-12-22 2021-06-15 Oppo广东移动通信有限公司 蓝牙信号调整方法、装置、测试终端、系统及可读介质
CN108039928B (zh) * 2017-12-22 2021-06-15 Oppo广东移动通信有限公司 接收信号强度测试方法、装置、系统以及电子设备
CN108055092B (zh) * 2017-12-22 2021-07-13 Oppo广东移动通信有限公司 蓝牙信号调整方法、装置、测试终端、系统及可读介质
CN108234045B (zh) * 2017-12-22 2021-09-14 Oppo广东移动通信有限公司 接收信号强度调整方法、装置、终端测试系统及电子终端
CN108199785B (zh) * 2017-12-22 2021-06-15 Oppo广东移动通信有限公司 发射功率测试方法、装置、系统以及电子设备
CN108199789B (zh) * 2017-12-22 2021-06-15 Oppo广东移动通信有限公司 蓝牙信号调整方法、装置、测试终端、系统及可读介质
CN108234034B (zh) * 2017-12-22 2021-05-11 Oppo广东移动通信有限公司 蓝牙信号调整方法、装置、测试终端、系统及可读介质
CN108234035B (zh) * 2017-12-22 2021-07-13 Oppo广东移动通信有限公司 发射功率调整方法、装置、终端测试系统及电子终端
CN108234047B (zh) * 2017-12-22 2021-06-15 Oppo广东移动通信有限公司 接收信号强度测试方法、装置、系统以及电子设备
CN108199788B (zh) * 2017-12-22 2021-06-15 Oppo广东移动通信有限公司 发射功率测试方法、装置、系统以及电子设备
CN108199791A (zh) * 2017-12-22 2018-06-22 广东欧珀移动通信有限公司 接收信号强度测试方法、装置、系统以及电子设备
JP7181551B2 (ja) * 2019-01-08 2022-12-01 株式会社北陸精機 メタン生成システム
US12334889B1 (en) 2023-12-14 2025-06-17 Silicon Laboratories Inc. Gain contol to optimize sensitivity and blocking performance

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SE463540B (sv) 1988-09-19 1990-12-03 Ericsson Telefon Ab L M Saett foer att i ett radiokommunikationssystem digitalisera godtyckliga radiosignaler samt anordning foer utoevande av saettet
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US5285480A (en) * 1991-09-03 1994-02-08 General Electric Company Adaptive MLSE-VA receiver for digital cellular radio
US5214390A (en) * 1992-03-16 1993-05-25 Scientific-Atlanta, Inc. Method and apparatus for partial response demodulation
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US5535432A (en) 1994-09-14 1996-07-09 Ericsson Ge Mobile Communications Inc. Dual-mode satellite/cellular phone with a frequency synthesizer

Also Published As

Publication number Publication date
ZA986430B (en) 1999-02-03
US6195399B1 (en) 2001-02-27
AU8293898A (en) 1999-02-16
AU746287B2 (en) 2002-04-18
ES2166170T3 (es) 2002-04-01
CN1265237A (zh) 2000-08-30
JP4108922B2 (ja) 2008-06-25
CA2297734A1 (en) 1999-02-04
DE69802096D1 (de) 2001-11-22
CN1111944C (zh) 2003-06-18
AR018998A1 (es) 2001-12-26
EP0998783B1 (en) 2001-10-17
WO1999005781A1 (en) 1999-02-04
KR20010022197A (ko) 2001-03-15
DE69802096T2 (de) 2002-06-20
JP2001511613A (ja) 2001-08-14
EP0998783A1 (en) 2000-05-10

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