WO2013071156A1 - Dynamic receiver switching - Google Patents

Dynamic receiver switching Download PDF

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Publication number
WO2013071156A1
WO2013071156A1 PCT/US2012/064513 US2012064513W WO2013071156A1 WO 2013071156 A1 WO2013071156 A1 WO 2013071156A1 US 2012064513 W US2012064513 W US 2012064513W WO 2013071156 A1 WO2013071156 A1 WO 2013071156A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
downconversion
interferer
path
frequency
Prior art date
Application number
PCT/US2012/064513
Other languages
English (en)
French (fr)
Inventor
Udara C. Fernando
Original Assignee
Qualcomm Incorporated
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 Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to CN201280055138.0A priority Critical patent/CN103918236A/zh
Priority to IN2582CHN2014 priority patent/IN2014CN02582A/en
Priority to JP2014541343A priority patent/JP5788609B2/ja
Priority to KR1020147015517A priority patent/KR101484679B1/ko
Priority to EP12791047.9A priority patent/EP2777238B1/en
Publication of WO2013071156A1 publication Critical patent/WO2013071156A1/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
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
    • 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
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • 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
    • H04B1/74—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 for increasing reliability, e.g. using redundant or spare channels or apparatus

Definitions

  • the disclosure relates to techniques for dynamically configuring a receiver to switch amongst two or more downconversion paths.
  • a wideband receiver may be configured to simultaneously receive information on multiple channels.
  • the wideband receiver may utilize more than one downconversion path by mixing a received radio-frequency (RF) signal with a plurality of local oscillators (LO's) each having a distinct LO frequency.
  • LO's local oscillators
  • a first receive channel at a given center frequency may be downconverted using a first LO having a first LO frequency
  • a second receive channel at a different center frequency may be downconverted using a second LO having a second LO frequency.
  • FIG 1 illustrates an exemplary embodiment of a receiver according to the present disclosure.
  • FIG 2 illustrates an example of frequency spectra that may be present in the signal path of the receiver shown in FIG 1, when a single local oscillator is used for downconversion.
  • FIG 3 illustrates an example of frequency spectra that may be present in the signal path of the receiver shown in FIG 1, when two local oscillators are used for downconversion.
  • FIG 4 illustrates an exemplary embodiment of a receiver having two downconversion signal paths according to the present disclosure.
  • FIG 5 illustrates an exemplary embodiment of a scheme for switching between one or two downconversion paths according to the present disclosure.
  • FIG 6 illustrates an exemplary embodiment of a pre-downconversion spectrum wherein an additional interferer is present at frequency f5.
  • FIG 1 illustrates an exemplary embodiment of a receiver 100 according to the present disclosure.
  • the receiver 100 is shown for exemplary purposes only, and is not meant to restrict the scope of the present disclosure.
  • the techniques of the present disclosure may be readily applied to accommodate receivers having more than two downconversion paths.
  • Such alternative exemplary embodiments are contemplated to be within the scope of the present disclosure.
  • an RF signal 100a is coupled to an RF processing block 110.
  • RF processing block 110 may include RF filters, one or more LNA's, etc., that perform radio frequency processing on the RF signal 100a.
  • the output of block 110 is coupled to first downconversion path 130 and second downconversion path 132, which downconvert the output of RF processing block 110 to lower frequencies.
  • first downconversion path 130 mixes the output of RF processing block 110 with a local oscillator (LOl) having a first mixing frequency
  • second downconversion path 132 mixes the output of RF processing block 110 with a local oscillator (L02) having a second mixing frequency.
  • LOl local oscillator
  • L02 local oscillator
  • a single “downconversion path” will be understood to refer to any circuitry designed to mix a signal with a local oscillator having a distinct frequency.
  • a single downconversion path may include dual mixers for mixing a signal with in-phase (I) and quadrature (Q) versions of a single local oscillator.
  • LOl and L02 may mix distinct channels in the RF outputs of RF processing block 110 each down to a zero frequency (e.g., according to a zero-IF architecture).
  • the local oscillators may mix the RF channels down to one or more low intermediate frequencies (e.g., according to a low IF architecture).
  • the outputs of blocks 130 and 132 are provided to an A/D converter (ADC) and digital processing block 140.
  • Block 140 may convert the outputs of blocks 130 and 132 to a digital signal, and additionally process the digital signal using digital processing hardware.
  • Block 120 may detect the presence of an interferer signal anywhere in the signal processing path shown in FIG 1, and pre-programmed logic in block 125 may enable or disable either of the blocks 130 and 132 in response to detecting a level of interferer detection, as further described hereinbelow.
  • the block 125 may be similarly configured to enable or disable any one or plurality of the downconversion blocks.
  • the interferer detection block 120 and path selection logic block 125 are shown as separate blocks in FIG 1, it will be appreciated that they may be implemented as a single block in alternative exemplary embodiments.
  • FIG 2 illustrates an example of frequency spectra that may be present in the signal path of the receiver 100 shown in FIG 1, when a single downconversion path with corresponding local oscillator (LOl) is used for downconversion.
  • the top (pre- downcon version) RF frequency spectrum shows three wanted signals centered at fl, f2, and f4, and an interferer centered at f3.
  • a single local oscillator LOl is centered at frequency fixii , wherein fLoi is between f2 and f3.
  • the bottom (post-do wnconversion) plot shows the spectrum following downconversion by LOl, with fi n now centered at zero frequency corresponding to zero IF.
  • RSB residual side band
  • the RSB may be generated in the post- downconversion spectrum by, for example, imbalance in the I and Q signal paths of the receiver, and may undesirably interfere with some portion of the wanted signal, as shown in FIG 2.
  • FIG 3 illustrates an example of frequency spectra that may be present in the signal path of the receiver 100 shown in FIG 1, when two downconversion paths with corresponding local oscillators are used for downconversion.
  • the top (pre- downconversion) RF frequency spectrum shows two local oscillators LOl and L02 centered at frequencies ILOI and fi >2, respectively, wherein fi n is between fl and f2, and fi )2 corresponds to f4.
  • the bottom (post-downconversion) plots show the baseband spectra following downconversion by LOl and L02.
  • the baseband spectrum shows the wanted signals (corresponding to fl and f2) around zero IF, while the interferer and the RSB of the interferer are shown attenuated outside the baseband.
  • the baseband spectrum shows the wanted signal (corresponding to f4) at zero IF, and the interferer outside the baseband channel.
  • the receiver 100 may advantageously avoid placing the RSB of the interferer into a wanted signal, in contrast to the case of a single downconversion path as shown in FIG 2. It will, however, also be appreciated that employing two downconversion paths versus one may also increase power consumption in the receiver.
  • an interferer detection block 120 such as shown in FIG 1 may be employed to detect interferers in the spectrum, and a block 125 may dynamically configure the number of downconversion paths to be enabled based on the detected interferers.
  • the interferer detection block 120 may measure the interference power present at any frequency, and the path selection logic block 125 may determine whether such power exceeds a predetermined threshold.
  • An interferer frequency may be determined, for example, using knowledge of the frequencies at which the wanted signals are expected. If the measured interference power does not exceed the predetermined threshold, then a single downconversion path may be used. Alternatively, if the measured interference power exceeds the predetermined threshold, then multiple downconversion paths may be used.
  • FIG 2 illustrates an exemplary embodiment of a receiver 400 having two downconversion signal paths according to the present disclosure. Note the exemplary embodiment shown in FIG 4 is not meant to limit the scope of the present disclosure, and other exemplary embodiments having alternative partitioning of signal paths other than that shown in FIG 4 are contemplated to be within the scope of the present disclosure.
  • an antenna 410 is coupled to a low noise amplifier (LNA) 420.
  • the output of the LNA 420 is coupled to a divider/splitter 430, which splits the RF signal output of the LNA into at least two signals, one for each downconversion path.
  • a first of these signals is provided to a first downconversion signal path of a mixer block 440, including I and Q mixers 441, 442, local oscillator 443, and trans-impedance amplifiers 444 and 445.
  • a second signal is provided to a second downconversion signal path of block 440, including I and Q mixers 446, 447, local oscillator 448, and trans-impedance amplifiers 449 and 450.
  • the outputs of the mixer block 440 are digitized by analog to digital converters (ADC's) 452, 454, 456, 458.
  • ADC's analog to digital converters
  • the digital outputs of the ADC's are provided to a digital block 460, which may perform, for example, digital computation and/or filtering.
  • block 460 may output interference metrics including a wideband power (WB) and a narrowband power (NB), both of which may be computed from the digitized outputs of the mixer block 440.
  • WB wideband power
  • NB narrowband power
  • the wideband power may be computed by computing the sum I 2 +Q 2 (i.e., a squared magnitude) of the digitized VQ outputs of block 440 prior to digital filtering performed by the block 460.
  • the narrowband power (NB) may be computed as the sum I 2 +Q 2 of post-filtered versions of the digitized VQ outputs of block 440.
  • a path selection logic block such as block 125 shown in FIG 1 may employ logic such as the following:
  • FM corresponds to a predetermined fading margin
  • FIG 5 illustrates an exemplary embodiment of a scheme for switching between one or two downconversion paths according to the present disclosure. It will be appreciated that schemes for accommodating more than two downconversion paths may be readily derived in light of the present disclosure, and such alternative exemplary embodiments are contemplated to be within the scope of the present disclosure.
  • WB wideband power
  • NB narrowband power
  • WB is not greater than NB + FM
  • the scheme may proceed to block 540, wherein operation is switched to (or remains with) two or more downconversion paths. The scheme then returns to block 510.
  • the threshold or margin utilized to switch from one downconversion path to two downconversion paths may be different from the threshold or margin utilized to switch from two downconversion paths to one downconversion path.
  • Hysteresis may further be employed when determining appropriate levels to switch. Any of the predetermined thresholds may be configured depending on channel allocation information received from a base station.
  • Alternative exemplary embodiments employing other types of path selection logic are contemplated to be within the scope of the present disclosure.
  • interference detection may be performed in the RF or analog domain, using one or more blocks not shown in FIG 4.
  • alternative digital techniques may be employed to determine the presence of interferers in the spectrum.
  • the interferer detection module may receive an indication of interferer strength from a base station, or from any other information source. Exemplary embodiments employing other types of interference detection techniques known in the art are contemplated to be within the scope of the present disclosure.
  • FIG 6 illustrates an exemplary embodiment of a pre-downconversion spectrum wherein an additional interferer is present at frequency f5.
  • an interferer detection block such as block 120 in FIG 1 may also be configured to detect such interference, and re-configure the number of downconversion paths based on such detection.
  • Such alternative exemplary embodiments are contemplated to be within the scope of the present disclosure.
  • alternative exemplary embodiments may, for example, incorporate a separate LNA and/or antenna for each downconversion path.
  • each downconversion path may be provided on a separate chip or integrated circuit, and a common interference detection/path selection logic module may be provided to selectively enable the circuitry corresponding to each downconversion path.
  • a common interference detection/path selection logic module may be provided to selectively enable the circuitry corresponding to each downconversion path.
  • the techniques of the present disclosure may readily be applied to accommodate more than two downconversion paths.
  • the interferer detection / path selection logic module may be configured to disable any one or two of the downconversion paths in response to the detected levels of interference being compared to one, two, or more thresholds.
  • Such alternative exemplary embodiments are contemplated to be within the scope of the present disclosure.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • a software module may reside in Random Access Memory (RAM), flash memory, Read Only Memory (ROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal.
  • the processor and the storage medium may reside as discrete components in a user terminal.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a computer.
  • such computer- readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
  • Disk and disc includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-Ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
PCT/US2012/064513 2011-11-09 2012-11-09 Dynamic receiver switching WO2013071156A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201280055138.0A CN103918236A (zh) 2011-11-09 2012-11-09 动态接收机切换
IN2582CHN2014 IN2014CN02582A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 2011-11-09 2012-11-09
JP2014541343A JP5788609B2 (ja) 2011-11-09 2012-11-09 動的な受信機の切り替え
KR1020147015517A KR101484679B1 (ko) 2011-11-09 2012-11-09 동적 수신기 스위칭
EP12791047.9A EP2777238B1 (en) 2011-11-09 2012-11-09 Dynamic receiver switching

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201161557838P 2011-11-09 2011-11-09
US61/557,838 2011-11-09
US13/402,781 2012-02-22
US13/402,781 US8774334B2 (en) 2011-11-09 2012-02-22 Dynamic receiver switching

Publications (1)

Publication Number Publication Date
WO2013071156A1 true WO2013071156A1 (en) 2013-05-16

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PCT/US2012/064513 WO2013071156A1 (en) 2011-11-09 2012-11-09 Dynamic receiver switching

Country Status (7)

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US (1) US8774334B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP2777238B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JP5788609B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
KR (1) KR101484679B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CN (2) CN103918236A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IN (1) IN2014CN02582A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
WO (1) WO2013071156A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9026070B2 (en) * 2003-12-18 2015-05-05 Qualcomm Incorporated Low-power wireless diversity receiver with multiple receive paths
US9450665B2 (en) * 2005-10-19 2016-09-20 Qualcomm Incorporated Diversity receiver for wireless communication
US9178669B2 (en) 2011-05-17 2015-11-03 Qualcomm Incorporated Non-adjacent carrier aggregation architecture
US9252827B2 (en) 2011-06-27 2016-02-02 Qualcomm Incorporated Signal splitting carrier aggregation receiver architecture
US9154179B2 (en) 2011-06-29 2015-10-06 Qualcomm Incorporated Receiver with bypass mode for improved sensitivity
US12081243B2 (en) 2011-08-16 2024-09-03 Qualcomm Incorporated Low noise amplifiers with combined outputs
US9362958B2 (en) 2012-03-02 2016-06-07 Qualcomm Incorporated Single chip signal splitting carrier aggregation receiver architecture
US9172402B2 (en) 2012-03-02 2015-10-27 Qualcomm Incorporated Multiple-input and multiple-output carrier aggregation receiver reuse architecture
US9118439B2 (en) 2012-04-06 2015-08-25 Qualcomm Incorporated Receiver for imbalanced carriers
US9154356B2 (en) 2012-05-25 2015-10-06 Qualcomm Incorporated Low noise amplifiers for carrier aggregation
US9867194B2 (en) 2012-06-12 2018-01-09 Qualcomm Incorporated Dynamic UE scheduling with shared antenna and carrier aggregation
US9300420B2 (en) 2012-09-11 2016-03-29 Qualcomm Incorporated Carrier aggregation receiver architecture
US9543903B2 (en) 2012-10-22 2017-01-10 Qualcomm Incorporated Amplifiers with noise splitting
US8995591B2 (en) 2013-03-14 2015-03-31 Qualcomm, Incorporated Reusing a single-chip carrier aggregation receiver to support non-cellular diversity
CN103715990B (zh) * 2013-12-30 2016-08-17 北京航天测控技术有限公司 一种多通道宽带的下变频系统
CN104735716B (zh) * 2015-01-06 2017-05-10 北京佰才邦技术有限公司 应用在移动通信中的频率调整方法和装置
US10177722B2 (en) 2016-01-12 2019-01-08 Qualcomm Incorporated Carrier aggregation low-noise amplifier with tunable integrated power splitter
WO2018087428A1 (en) 2016-11-08 2018-05-17 Woodio Oy Compressed articles and methods of manufacturing the same
JP6929203B2 (ja) 2017-11-15 2021-09-01 旭化成エレクトロニクス株式会社 ダイレクトコンバージョン受信機
KR102468797B1 (ko) 2018-04-04 2022-11-18 삼성전자주식회사 반송파 집성을 지원하기 위한 증폭 동작을 수행하는 rf 집적회로 및 이를 포함하는 수신기
FI130116B (en) 2018-09-21 2023-03-03 Woodio Oy Process for the production of shaped products

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6424683B1 (en) * 1998-01-22 2002-07-23 Infineon Technologies Ag Circuit for demodulating two-dimensional data symbols transmitted by a carrier-based data transmission
US6888888B1 (en) * 2001-06-26 2005-05-03 Microsoft Corporation Simultaneous tuning of multiple channels using intermediate frequency sub-sampling
US20060291428A1 (en) * 2005-06-23 2006-12-28 Filipovic Daniel F Adaptive multi-channel modem
WO2010059257A1 (en) * 2008-11-24 2010-05-27 Cisco Technology, Inc. Offset direct conversion receiver

Family Cites Families (268)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US642468A (en) * 1899-11-02 1900-01-30 Avery Marr Company Window-shade fixture.
US688888A (en) * 1901-01-21 1901-12-17 Richard Schulz Smoke-consumer.
US3911364A (en) 1974-05-09 1975-10-07 Bell Telephone Labor Inc Cophasing combiner with cochannel signal selector
JPS5542790B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-01-09 1980-11-01
US4035729A (en) 1976-05-21 1977-07-12 General Electric Company Audio signal quality indicating circuit
GB1588367A (en) 1977-10-18 1981-04-23 Parker B D Apparatus for selecting one of a plurality of receivers receiving a signal from a single common source
US4326294A (en) 1979-02-13 1982-04-20 Nippon Telegraph & Telephone Public Corporation Space diversity reception system having compensation means of multipath effect
JPS61284125A (ja) 1985-06-11 1986-12-15 Nec Corp ダイバ−シチ受信方式
JPH0683127B2 (ja) 1985-07-22 1994-10-19 日本電気株式会社 ダイバーシチ受信無線機
US4715048A (en) 1986-05-02 1987-12-22 Canadian Patents And Development Limited Frequency offset diversity receiving system
US4969207A (en) 1987-03-20 1990-11-06 Nippon Telegraph And Telephone Corporation Radio receiver with reception deterioration compensation
GB8821570D0 (en) 1988-09-15 1989-03-30 Plessey Co Plc Course recommendation display
US5390342A (en) 1990-03-14 1995-02-14 Pioneer Electronic Corporation Receiver using selective diversity receiving system
JP2643614B2 (ja) 1991-02-22 1997-08-20 日本電気株式会社 ディジタル移動通信端末装置
JPH05102898A (ja) 1991-08-07 1993-04-23 Shiyoudenriyoku Kosoku Tsushin Kenkyusho:Kk 高調波通信方式
US5321850A (en) 1991-10-09 1994-06-14 Telefonaktiebolaget L M Ericsson Diversity radio receiver automatic frequency control
DE69434015D1 (de) 1993-02-26 2004-10-28 Toshiba Kawasaki Kk Raumdiversityempfänger für ein digitales Kommunikationssystem
JPH0730452A (ja) 1993-07-12 1995-01-31 Fujitsu Ltd 受信回路
US5541963A (en) 1993-12-01 1996-07-30 Hitachi, Ltd. Diversity receiving apparatus
US5566364A (en) 1994-01-31 1996-10-15 Nec Corporation Power saving portable radio communication device with diversity reception
JP3022194B2 (ja) 1994-09-02 2000-03-15 三菱電機株式会社 ダイバーシチ受信装置
US5694395A (en) 1994-09-30 1997-12-02 Lucent Technologies, Inc. Method and apparatus for processing multicarrier signals
US5758266A (en) * 1994-09-30 1998-05-26 Qualcomm Incorporated Multiple frequency communication device
JP3088246B2 (ja) 1994-10-05 2000-09-18 三菱電機株式会社 無線通信装置
GB9424341D0 (en) 1994-12-02 1995-01-18 Philips Electronics Uk Ltd Receiver diversity
US5940452A (en) 1995-11-29 1999-08-17 Motorola, Inc. Dual mode radio subscriber unit having a diversity receiver apparatus and method therefor
JPH09200070A (ja) 1996-01-12 1997-07-31 Matsushita Electric Ind Co Ltd 受信回路
DE19630280A1 (de) 1996-07-26 1998-01-29 Basf Ag Verfahren zur Herstellung von Cokondensaten aus Asparaginsäure und Aminen
US5794159A (en) 1996-08-07 1998-08-11 Nokia Mobile Phones Limited Dual band mobile station employing cross-connected transmitter and receiver circuits
US6026288A (en) 1996-12-10 2000-02-15 Lucent Technologies, Inc. Communications system with an apparatus for controlling overall power consumption based on received signal strength
JP3657377B2 (ja) 1996-12-27 2005-06-08 松下電器産業株式会社 受信回路
FI108486B (fi) 1997-01-31 2002-01-31 Nokia Corp Menetelmõ ja piirijõrjestely vastaanotettujen signaalien kõsittelemiseksi tiedonsiirtojõrjestelmõssõ
US6040732A (en) 1997-04-09 2000-03-21 Analog Devices, Inc. Switched-transconductance circuit within integrated T-switches
CN1201298A (zh) * 1997-05-30 1998-12-09 朗迅科技公司 干扰被减低的无线时分多址发射机
JPH11127300A (ja) * 1997-10-22 1999-05-11 Canon Inc 無線通信装置および方法
JP3109504B2 (ja) 1998-03-27 2000-11-20 日本電気株式会社 セルラシステムおよびセルラシステムの隣接周波数干渉回避方法と移動局
US5999990A (en) 1998-05-18 1999-12-07 Motorola, Inc. Communicator having reconfigurable resources
EP0959567A1 (en) 1998-05-19 1999-11-24 Robert Bosch Gmbh Diplexer for mobile phone
JP2000013278A (ja) 1998-06-25 2000-01-14 Matsushita Electric Ind Co Ltd 無線装置及びそれを備える無線携帯機及び無線基地局並びにそれらを含む無線通信システム
US5999815A (en) 1998-07-08 1999-12-07 Motorola, Inc. Method and apparatus for implementing diversity for a dual-mode communication unit
US6088348A (en) 1998-07-13 2000-07-11 Qualcom Incorporated Configurable single and dual VCOs for dual- and tri-band wireless communication systems
JP3109595B2 (ja) 1998-08-28 2000-11-20 日本電気株式会社 受信ダイバーシティ制御方法およびダイバーシティ受信機
DE19845534B4 (de) 1998-10-02 2005-01-27 Robert Bosch Gmbh Antennenschaltung
JP3199039B2 (ja) 1998-11-02 2001-08-13 日本電気株式会社 消費電力低減回路及びこれを用いた無線通信装置並びに無線通信装置における消費電力低減方法
EP1145430B1 (en) 1998-11-12 2004-09-15 Broadcom Corporation Integrated tuner architecture
US6430237B1 (en) 1998-11-16 2002-08-06 Transamerica Business Credit Corporation Method for accurate signal-to-interference measurement for wireless communication receivers
GB2347596B (en) 1998-12-18 2003-07-30 Mitel Corp Apparatus for estimating jitter in RTP encapsulated voice packets received over a data network
US6522895B1 (en) 1998-12-31 2003-02-18 Ericsson Inc. Integrated transmitter and receiver components for a dual-band transceiver
US6208844B1 (en) 1999-02-23 2001-03-27 Conexant Systems, Inc. System and process for shared functional block communication transceivers with GPS capability
US6377117B2 (en) 1999-07-27 2002-04-23 Conexant Systems, Inc. Method and system for efficiently transmitting energy from an RF device
US7260369B2 (en) 2005-08-03 2007-08-21 Kamilo Feher Location finder, tracker, communication and remote control system
US6684065B2 (en) 1999-12-20 2004-01-27 Broadcom Corporation Variable gain amplifier for low voltage applications
EP1164719A4 (en) 2000-01-04 2004-12-08 Mitsubishi Electric Corp CELLULAR TELEPHONE
JP2001285114A (ja) 2000-03-28 2001-10-12 Sharp Corp アンテナ共用複数バンド通信機
US6674337B2 (en) 2000-03-28 2004-01-06 California Institute Of Technology Concurrent multi-band low noise amplifier architecture
JP2002118483A (ja) 2000-10-11 2002-04-19 Matsushita Electric Ind Co Ltd 無線回路装置及び無線回路装置の制御方法
US6407689B1 (en) * 2000-11-01 2002-06-18 Qualcomm, Incorporated Method and apparatus for controlling stages of a multi-stage circuit
US6694129B2 (en) 2001-01-12 2004-02-17 Qualcomm, Incorporated Direct conversion digital domain control
JP2002261880A (ja) * 2001-02-28 2002-09-13 Sanyo Electric Co Ltd 携帯電話機
WO2002075942A2 (en) 2001-03-14 2002-09-26 California Institute Of Technology Concurrent dual-band receiver architecture
US6424222B1 (en) 2001-03-29 2002-07-23 Gct Semiconductor, Inc. Variable gain low noise amplifier for a wireless terminal
US6535725B2 (en) 2001-03-30 2003-03-18 Skyworks Solutions, Inc. Interference reduction for direct conversion receivers
US6600931B2 (en) 2001-03-30 2003-07-29 Nokia Corporation Antenna switch assembly, and associated method, for a radio communication station
FI20011217A7 (fi) 2001-06-08 2002-12-09 Nokia Corp Vastaanottomenetelmä, radiojärjestelmä ja vastaanotin
US7024172B1 (en) * 2001-06-15 2006-04-04 Rockwell Collins, Inc. Direct conversion receiver using a dithered local oscillator to mitigate adjacent channel coherent interference
US6985712B2 (en) 2001-08-27 2006-01-10 Matsushita Electric Industrial Co., Ltd. RF device and communication apparatus using the same
US7061993B2 (en) 2001-08-29 2006-06-13 Sony Corporation CDMA receiver architecture for lower bypass switch point
US7277679B1 (en) 2001-09-28 2007-10-02 Arraycomm, Llc Method and apparatus to provide multiple-mode spatial processing to a terminal unit
US6819941B2 (en) 2001-10-11 2004-11-16 Rf Micro Devices, Inc. Single output stage power amplification for multimode applications
US7116652B2 (en) 2001-10-18 2006-10-03 Lucent Technologies Inc. Rate control technique for layered architectures with multiple transmit and receive antennas
US20030125040A1 (en) 2001-11-06 2003-07-03 Walton Jay R. Multiple-access multiple-input multiple-output (MIMO) communication system
US6754510B2 (en) 2001-12-13 2004-06-22 Superconductor Technologies, Inc. MEMS-based bypass system for use with a HTS RF receiver
US7299021B2 (en) 2001-12-28 2007-11-20 Nokia Corporation Method and apparatus for scaling the dynamic range of a receiver for continuously optimizing performance versus power consumption
US6816718B2 (en) 2002-02-07 2004-11-09 Rf Micro Devices, Inc. DC offset correction using dummy amplifier
US7394505B2 (en) * 2002-02-19 2008-07-01 Sige Semiconductor Inc. High linearity, low noise figure tuner front end circuit
GB0204108D0 (en) 2002-02-21 2002-04-10 Analog Devices Inc 3G radio
US6826391B2 (en) 2002-03-15 2004-11-30 Nokia Corporation Transmission and reception antenna system for space diversity reception
US6728517B2 (en) 2002-04-22 2004-04-27 Cognio, Inc. Multiple-input multiple-output radio transceiver
AU2003228602A1 (en) 2002-04-22 2003-11-03 Cognio, Inc. Multiple-input multiple-output radio transceiver
JP4043850B2 (ja) 2002-06-03 2008-02-06 松下電器産業株式会社 ダイバシティ切替装置
JP2004015162A (ja) 2002-06-04 2004-01-15 Hitachi Metals Ltd マルチバンド通信装置用ｒｆ回路及びアンテナスイッチモジュール
US7039377B2 (en) 2002-06-14 2006-05-02 Skyworks Solutions, Inc. Switchable gain amplifier
US6954446B2 (en) 2002-06-25 2005-10-11 Motorola, Inc. Multiple mode RF communication device
KR100442833B1 (ko) 2002-07-12 2004-08-02 삼성전자주식회사 이동통신시스템에 있어서 다중대역 무선주파수 수신방법및 장치
US6987950B2 (en) 2002-07-25 2006-01-17 Qualcomm, Incorporated Radio with duplexer bypass capability
US7092737B2 (en) 2002-07-31 2006-08-15 Mitsubishi Electric Research Laboratories, Inc. MIMO systems with rate feedback and space time transmit diversity
US7212788B2 (en) 2002-08-13 2007-05-01 Atheros Communications, Inc. Method and apparatus for signal power loss reduction in RF communication systems
DE60202066T2 (de) 2002-09-12 2005-03-31 Siemens Ag Doppelband-Diversitätsempfänger
JP3672196B2 (ja) 2002-10-07 2005-07-13 松下電器産業株式会社 アンテナ装置
DE10251288B4 (de) 2002-11-04 2005-08-11 Advanced Micro Devices, Inc., Sunnyvale Equalizerschaltung mit Kerbkompensation für einen Direktmischempfänger
US6952594B2 (en) 2002-11-22 2005-10-04 Agilent Technologies, Inc. Dual-mode RF communication device
GB0227626D0 (en) 2002-11-27 2003-01-08 Koninkl Philips Electronics Nv Low complexity equalizer for radio receiver
US7260377B2 (en) 2002-12-02 2007-08-21 Broadcom Corporation Variable-gain low noise amplifier for digital terrestrial applications
US7250804B2 (en) 2002-12-17 2007-07-31 M/A -Com, Inc. Series/shunt switch and method of control
WO2004057756A1 (en) 2002-12-19 2004-07-08 Koninklijke Philips Electronics N.V. Power amplifier with bias control
US6806777B2 (en) 2003-01-02 2004-10-19 Intel Corporation Ultra wide band low noise amplifier and method
US7187735B2 (en) 2003-01-28 2007-03-06 Raytheon Company Mixed technology MEMS/SiGe BiCMOS digitalized analog front end with direct RF sampling
US7013166B2 (en) 2003-02-03 2006-03-14 Nokia Corporation Multi-carrier receiver architecture
DE602004024926D1 (de) 2003-02-07 2010-02-11 Nxp Bv Signal
US7373171B2 (en) 2003-02-14 2008-05-13 Tdk Corporation Front end module
KR100539781B1 (ko) 2003-02-22 2006-01-10 엘지전자 주식회사 듀얼모드 휴대단말기의 고주파 경로설정 장치 및 방법
US7929985B2 (en) 2003-05-01 2011-04-19 Telefonaktiebolaget Lm Ericsson (Publ) Multiple antenna receiver
TWI226761B (en) 2003-05-08 2005-01-11 Ind Tech Res Inst Dual band transceiver architecture for wireless application
TWI225332B (en) 2003-05-20 2004-12-11 Mediatek Inc Multi-band low noise amplifier
US7929921B2 (en) 2003-06-10 2011-04-19 Motorola Mobility, Inc. Diversity control in wireless communications devices and methods
US20040266356A1 (en) 2003-06-27 2004-12-30 Javor Ronald D. Multiple antenna apparatus and method to provide interference detection and cancellation
JP3959374B2 (ja) 2003-06-30 2007-08-15 Ｔｄｋ株式会社 Ｕｓｂインターフェースシステム
JP4157506B2 (ja) 2003-07-29 2008-10-01 株式会社東芝 無線受信装置及び無線受信方法
US7142042B1 (en) 2003-08-29 2006-11-28 National Semiconductor Corporation Nulled error amplifier
US7403508B1 (en) 2003-09-22 2008-07-22 Miao George J Multiband MIMO-based W-CDMA and UWB communications
US6917821B2 (en) 2003-09-23 2005-07-12 Qualcomm, Incorporated Successive interference cancellation receiver processing with selection diversity
US7197291B2 (en) 2003-10-03 2007-03-27 Motorola, Inc. Multimode receiver and method for controlling signal interference
US7116952B2 (en) 2003-10-09 2006-10-03 Intel Corporation Method and apparatus to provide an area efficient antenna diversity receiver
US6990357B2 (en) 2003-10-17 2006-01-24 Nokia Corporation Front-end arrangements for multiband multimode communication engines
US7869528B2 (en) 2003-10-31 2011-01-11 Northrop Grumman Systems Corporation Multi-carrier transceiver assembly
US20050118977A1 (en) 2003-12-02 2005-06-02 Drogi Serge F. Method, apparatus, and systems for digital radio communication systems
US9026070B2 (en) 2003-12-18 2015-05-05 Qualcomm Incorporated Low-power wireless diversity receiver with multiple receive paths
US7649833B2 (en) * 2003-12-29 2010-01-19 Intel Corporation Multichannel orthogonal frequency division multiplexed receivers with antenna selection and maximum-ratio combining and associated methods
US7099646B1 (en) 2004-01-27 2006-08-29 Marvell International Ltd. Signal mixer having a single-ended input and a differential output
US7444166B2 (en) 2004-02-12 2008-10-28 Qualcomm Incorporated Wireless diversity receiver with shared receive path
GB0404194D0 (en) 2004-02-25 2004-03-31 Ttp Communications Ltd Wireless communication device and method of operating the same
KR100809795B1 (ko) 2004-03-05 2008-03-07 콸콤 인코포레이티드 무선통신에서 다중―안테나 수신 다이버시티 제어
US7415260B2 (en) 2004-03-08 2008-08-19 Standard Microsystems Corporation Current-mode direct conversion receiver
JP2007529181A (ja) 2004-03-15 2007-10-18 サムスン エレクトロニクス カンパニー リミテッド マルチモード／マルチバンド移動局及びその移動局の動作方法
US20070243832A1 (en) 2004-03-15 2007-10-18 Hyung-Weon Park Multimode/Multiband Mobile Station and Method for Operating the Same
US8270927B2 (en) 2004-03-29 2012-09-18 Qualcom, Incorporated Adaptive interference filtering
US7283851B2 (en) 2004-04-05 2007-10-16 Qualcomm Incorporated Power saving mode for receiver circuit blocks based on transmitter activity
US7643848B2 (en) 2004-04-13 2010-01-05 Qualcomm, Incorporated Multi-antenna transceiver system
US7023272B2 (en) 2004-04-19 2006-04-04 Texas Instruments Incorporated Multi-band low noise amplifier system
DE102004021867B4 (de) 2004-05-04 2012-02-16 Infineon Technologies Ag Verfahren zur Signalverarbeitung, insbesondere in einem Hochfrequenzempfänger und Signalaufbereitungsschaltung
US7167044B2 (en) 2004-05-10 2007-01-23 University Of Florida Research Foundation, Inc. Dual-band CMOS front-end with two gain modes
KR100691421B1 (ko) 2004-05-29 2007-03-09 삼성전자주식회사 양방향 오픈 케이블용 멀티입출력장치 및 튜너장치
CN1985528B (zh) 2004-06-03 2010-06-09 高通股份有限公司 具有低成本高性能本振架构的变频中继器
US7161423B2 (en) 2004-06-30 2007-01-09 Silicon Laboratories Inc. Parallel power amplifier and associated methods
US7697905B2 (en) 2004-09-10 2010-04-13 Qualcomm Incorporation Local oscillator feedthrough cancellation scheme to remove RF and baseband offsets
US7286238B2 (en) 2004-09-22 2007-10-23 Corning Incorporated Feature isolation for frequency-shifting interferometry
US7787520B2 (en) 2004-10-06 2010-08-31 Broadcom Corporation Method and system for channel estimation in a single channel (SC) single-input multiple-output (SIMO) system
JP4598831B2 (ja) * 2004-11-03 2010-12-15 ワイオニクス リサーチ 超広帯域ｃｍｏｓトランシーバ
US7764726B2 (en) 2004-12-01 2010-07-27 Qualomm Incorporated Systems, methods, and apparatus for jammer rejection
JP2006166277A (ja) 2004-12-10 2006-06-22 Hitachi Media Electoronics Co Ltd 送受信装置およびモジュール
US7466645B2 (en) 2004-12-21 2008-12-16 Panasonic Corporation OFDM signal receiving apparatus
US7372336B2 (en) 2004-12-31 2008-05-13 Samsung Electronics Co., Ltd. Small-sized on-chip CMOS power amplifier having improved efficiency
TWI262447B (en) 2005-01-07 2006-09-21 Fujitsu Ltd Tag device, antenna, and portable-type card
US7333831B2 (en) 2005-02-07 2008-02-19 Nxp B.V. Interchangeable receive inputs for band and system swappability in communication systems and related methods
JP2006237711A (ja) 2005-02-22 2006-09-07 Renesas Technology Corp マルチバンド低雑音増幅器、マルチバンド低雑音増幅器モジュール、無線用半導体集積回路およびマルチバンドｒｆモジュール
US7395040B2 (en) 2005-03-29 2008-07-01 Broadcom Corporation Multiple band multiple input multiple output transceiver integrated circuit
US7787843B2 (en) 2005-03-29 2010-08-31 Broadcom Corporation Multiple band direct conversion radio frequency transceiver integrated circuit
US7356325B2 (en) 2005-04-04 2008-04-08 Broadcom Corporation Local oscillation routing plan applicable to a multiple RF band RF MIMO transceiver
US7957351B2 (en) 2005-04-04 2011-06-07 Qualcomm Incorporated Method and apparatus for management of multi-carrier communications in a wireless communication system
US7796956B2 (en) 2005-05-03 2010-09-14 Telefonaktiebolaget L M Ericsson (Publ) Receiver for a multi-antenna, multi-band radio
US20070008088A1 (en) * 2005-06-08 2007-01-11 Lear Corporation A multipower passive entry fob
US20070004355A1 (en) * 2005-06-29 2007-01-04 Issy Kipnis Apparatus, system, and method for multi-class wireless receiver
DE102005035096A1 (de) 2005-07-27 2007-02-01 Robert Bosch Gmbh Funkwellen-Empfangseinrichtung
JP4370621B2 (ja) 2005-08-23 2009-11-25 株式会社カシオ日立モバイルコミュニケーションズ 通信端末装置、通信制御方法および通信制御プログラム
JP4665676B2 (ja) 2005-09-09 2011-04-06 パナソニック株式会社 受信装置
US9450665B2 (en) 2005-10-19 2016-09-20 Qualcomm Incorporated Diversity receiver for wireless communication
US7660571B2 (en) 2005-11-04 2010-02-09 Broadcom Corporation Programmable attenuator using digitally controlled CMOS switches
US7914493B2 (en) 2005-12-02 2011-03-29 Cook Medical Technologies Llc Wire guide with engaging portion
US7593706B2 (en) 2005-12-21 2009-09-22 Motorola, Inc. Dynamic pre-selector for a GPS receiver
DE102006004951A1 (de) 2006-02-01 2007-08-09 Atmel Germany Gmbh Integrierte Schaltungsanordnung zum Überführen eines hochfrequenten Bandpaßsignals in ein niederfrequentes Quadratursignal
DE102006006291B4 (de) 2006-02-10 2011-07-14 Infineon Technologies AG, 81669 Tranceiveranordnung und Verfahren zum Verarbeiten eines Signals
US20070197178A1 (en) * 2006-02-21 2007-08-23 Nokia Corporation Automatic gain control system for receivers in wireless communications
US8521198B2 (en) 2006-05-12 2013-08-27 Qualcomm, Incorporated Dynamic LNA switch points based on channel conditions
JP4640836B2 (ja) 2006-05-30 2011-03-02 京セラ株式会社 無線通信方法および無線通信装置
WO2007148261A2 (en) 2006-06-22 2007-12-27 Nxp B.V. Dual band receiver with control means for preventing signal overloading
US8295371B2 (en) 2006-07-14 2012-10-23 Qualcomm Incorporated Multi-carrier receiver for wireless communication
CN101123444A (zh) * 2006-08-09 2008-02-13 大唐移动通信设备有限公司 一种射频控制方法
JP4864625B2 (ja) 2006-09-28 2012-02-01 京セラ株式会社 無線通信方法および無線通信装置
KR100824783B1 (ko) 2006-10-17 2008-04-24 삼성전자주식회사 다중 대역용 저잡음 증폭기 및 다중 대역용 무선 신호수신기
EP1916767B1 (en) 2006-10-25 2010-12-29 Istituto Superiore Mario Boella A method and an apparatus for reducing interference frequencies by using a notch filter
US8885744B2 (en) 2006-11-10 2014-11-11 Qualcomm Incorporated Providing antenna diversity in a wireless communication system
US7728664B2 (en) 2006-11-21 2010-06-01 Broadcom Corporation Low noise amplifier with multiple inputs and multiple outputs
WO2008084539A1 (ja) * 2007-01-11 2008-07-17 Pioneer Corporation ラジオ受信機
US8862081B2 (en) 2007-01-19 2014-10-14 Wi-Lan, Inc. Transceiver with receive path performance diversity and combiner with jammer detect feedback
WO2008092745A1 (en) 2007-01-30 2008-08-07 Nokia Siemens Networks Gmbh & Co. Kg A method of communication
US8237509B2 (en) 2007-02-23 2012-08-07 Qualcomm, Incorporated Amplifier with integrated filter
CN101267414B (zh) * 2007-03-12 2011-01-26 中国科学院上海微系统与信息技术研究所 一种正交频分多址下行通信系统及通信方法
US7719352B2 (en) 2007-03-13 2010-05-18 Qualcomm Incorporated Active circuits with isolation switches
US7764932B2 (en) 2007-03-14 2010-07-27 Broadcom Corporation Antenna system for use within a wireless communication device
US7978024B2 (en) 2007-03-15 2011-07-12 Marvell International Ltd. Integrated balanced-unbalanced duplexer
US7683851B2 (en) 2007-03-19 2010-03-23 Broadcom Corporation Method and system for using a single transformer for FM transmit and FM receive functions
US7952398B2 (en) 2007-04-27 2011-05-31 Avago Technologies Enterprise IP (Singapore) Pte. Ltd. Bias circuit for common-mode and semiconductor process voltage and temperature optimization for a receiver assembly
US8090369B2 (en) 2007-05-01 2012-01-03 Qualcomm Incorporated User equipment capability handling in long-term evolution systems
EP1993201A1 (en) 2007-05-18 2008-11-19 Interuniversitair Microelektronica Centrum Vzw Switchable multiband LNA design
US7486135B2 (en) 2007-05-29 2009-02-03 Telefonaktiebolaget Lm Ericsson (Publ) Configurable, variable gain LNA for multi-band RF receiver
GB0717042D0 (en) 2007-09-03 2007-10-10 Toumaz Technology Ltd Multiplier, mixer, modulator, receiver and transmitter
US7995985B2 (en) * 2007-09-10 2011-08-09 Utc Fire & Security Americas Corporation, Inc. Wireless security messaging model
US8139670B1 (en) 2007-09-21 2012-03-20 Marvell International Ltd. Modular MIMO transceiver architecture
JP2009124189A (ja) 2007-11-09 2009-06-04 Nsc Co Ltd 自動利得制御回路
JP2009130867A (ja) * 2007-11-28 2009-06-11 Renesas Technology Corp 半導体集積回路
US8090332B2 (en) 2007-12-12 2012-01-03 Qualcomm, Incorporated Tracking filter for a receiver
US7944298B2 (en) 2007-12-18 2011-05-17 Qualcomm, Incorporated Low noise and low input capacitance differential MDS LNA
US8295778B2 (en) 2008-01-11 2012-10-23 Apple Inc. Channel rank feedback in multiple-input multiple-output communication systems
CN101242158B (zh) * 2008-03-07 2010-08-04 武汉芯泰科技有限公司 一种可配置可重构的动态混频器
US7656230B2 (en) 2008-03-21 2010-02-02 Qualcomm, Incorporated Quadrature output low noise transconductance amplifier having differential input
US8345798B2 (en) * 2008-05-21 2013-01-01 Entropic Communications, Inc. Channel stacking system and method of operation
US8238410B2 (en) 2008-06-27 2012-08-07 Csr Technology Inc. Method and apparatus for mitigating the effects of narrowband interfering signals in a GPS receiver
US8149955B2 (en) 2008-06-30 2012-04-03 Telefonaktiebolaget L M Ericsson (Publ) Single ended multiband feedback linearized RF amplifier and mixer with DC-offset and IM2 suppression feedback loop
CN101299616B (zh) * 2008-07-08 2011-08-17 北京天碁科技有限公司 射频接收机及具有该射频接收机的电子设备
US8055229B2 (en) 2008-07-22 2011-11-08 Maxrise Inc. Low noise, highly linear amplifying stage and signal receiver using the same
US20100019967A1 (en) 2008-07-25 2010-01-28 Farrokh Farrokhi Method and apparatus for determining location
US8588151B2 (en) 2008-08-08 2013-11-19 Qualcomm Incorporated Access terminal capability update
US8571510B2 (en) 2008-08-18 2013-10-29 Qualcomm Incorporated High linearity low noise receiver with load switching
CN101409581A (zh) * 2008-11-07 2009-04-15 武汉虹信通信技术有限责任公司 一种降低无线直放站天线隔离度要求的装置及方法
JP2010154501A (ja) * 2008-11-27 2010-07-08 Sony Corp チューナモジュール
TW201022699A (en) * 2008-12-02 2010-06-16 Mediatek Inc If process engine, method for removing if carriers and GNSS receiver
US8514015B2 (en) 2008-12-10 2013-08-20 Qualcomm, Incorporated Amplifier with programmable off voltage
US7911269B2 (en) 2009-01-19 2011-03-22 Qualcomm Incorporated Ultra low noise high linearity LNA for multi-mode transceiver
US20100197263A1 (en) 2009-01-30 2010-08-05 Research In Motion Limited Method and apparatus for combined multi-carrier reception and receive antenna diversity
US8755476B2 (en) 2009-02-01 2014-06-17 Qualcomm Incorporated Apparatus and method for antenna switching diversity in an OFDM system
US8583170B2 (en) 2009-02-16 2013-11-12 Telefonaktiebolaget Lm Ericsson (Publ) Multi-band aggregated spectrum receiver employing frequency source reuse
US8073401B2 (en) 2009-02-17 2011-12-06 Rfaxis, Inc. Multi mode radio frequency transceiver front end circuit with inter-stage matching circuit
US20100214184A1 (en) 2009-02-24 2010-08-26 Qualcomm Incorporated Antenna devices and systems for multi-band coverage in a compact volume
US9231680B2 (en) 2009-03-03 2016-01-05 Rfaxis, Inc. Multi-channel radio frequency front end circuit
US8305986B2 (en) 2009-03-09 2012-11-06 Samsung Electronics Co., Ltd. Method and apparatus for uplink transmissions and CQI reports with carrier aggregation
US8233524B2 (en) 2009-03-12 2012-07-31 Freescale Semiconductor, Inc. Radio transmitter IQ imbalance measurement and correction methods and apparatus
US8022772B2 (en) 2009-03-19 2011-09-20 Qualcomm Incorporated Cascode amplifier with protection circuitry
US8031005B2 (en) 2009-03-23 2011-10-04 Qualcomm, Incorporated Amplifier supporting multiple gain modes
US8576768B2 (en) 2009-04-16 2013-11-05 Qualcomm Incorporated Hybrid multi-band receiver
US7786807B1 (en) 2009-04-23 2010-08-31 Broadcom Corporation Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages
CN101873148B (zh) 2009-04-23 2013-09-18 鸿富锦精密工业（深圳）有限公司 射频模块及应用该射频模块的无线通信装置
EP2422454B1 (en) 2009-04-24 2016-12-21 Mediatek Inc. Method and apparatus of carrier assignment in multi-carrier ofdm systems
US8848771B2 (en) 2009-05-14 2014-09-30 Qualcomm Incorporated System and method for simultaneous operation of multiple modems using a single transceiver
US8270499B2 (en) 2009-05-15 2012-09-18 Qualcomm, Incorporated Receiver with balanced I/Q transformer
US8175566B2 (en) 2009-06-04 2012-05-08 Qualcomm, Incorporated Multiple multi-mode low-noise amplifier receiver with shared degenerative inductors
US8130145B2 (en) 2009-06-24 2012-03-06 Qualcomm Incorporated Receive diversity in GNSS receivers
US8824967B2 (en) 2009-06-26 2014-09-02 Qualcomm Incorporated Dynamically changing a transmitter sampling frequency for a digital-to-analog converter (DAC) to reduce interference from DAC images
US9185718B2 (en) 2009-06-29 2015-11-10 Qualcomm Incorporated Centralized coexistence manager for controlling operation of multiple radios
JP2011015112A (ja) * 2009-07-01 2011-01-20 Hitachi Kokusai Electric Inc 無線受信機
US8102213B2 (en) 2009-07-23 2012-01-24 Qualcomm, Incorporated Multi-mode low noise amplifier with transformer source degeneration
US8310312B2 (en) 2009-08-11 2012-11-13 Qualcomm, Incorporated Amplifiers with improved linearity and noise performance
GB2472978A (en) 2009-08-24 2011-03-02 Vodafone Plc A multi-antenna receiver is switched between receiver diversity mode and carrier aggregation mode on the basis of network or/and terminal parameters
US8638682B2 (en) 2009-10-01 2014-01-28 Qualcomm Incorporated Method and apparatus for conducting measurements when multiple carriers are supported
JP2011082669A (ja) * 2009-10-05 2011-04-21 Mitsubishi Electric Corp デジタル放送受信装置
US9059773B2 (en) 2009-10-11 2015-06-16 SiTune Corporation Radio frequency tuner
CN102056296B (zh) 2009-10-30 2016-03-30 索尼株式会社 通信网络中的资源分配方法和装置
US8217723B2 (en) 2009-11-05 2012-07-10 Texas Instruments Incorporated Low noise amplifier circuit
JP2011119807A (ja) * 2009-12-01 2011-06-16 Mitsubishi Electric Corp 無線装置およびその無線通信方法
US20110250926A1 (en) 2009-12-21 2011-10-13 Qualcomm Incorporated Dynamic antenna selection in a wireless device
US8417286B2 (en) 2010-01-06 2013-04-09 Rfaxis, Inc. Transmit-receive radio frequency front end integrated circuits for laptop computer applications
WO2011094284A1 (en) 2010-01-26 2011-08-04 Maxlinear, Inc. Diversity receiver
EP2348642B8 (en) 2010-01-26 2017-04-05 OCT Circuit Technologies International Limited Process for achieving spur mitigation in an integrated circuit including a wide band receiver
US8725097B2 (en) 2010-02-09 2014-05-13 Broadcom Corporation Amplifier for cable and terrestrial applications with independent stage frequency tilt
CN102844983B (zh) 2010-03-02 2015-07-15 马维尔国际贸易有限公司 双载波放大器电路和方法
US8644198B2 (en) 2010-03-12 2014-02-04 Rf Micro Devices, Inc. Split-band power amplifiers and duplexers for LTE-advanced front end for improved IMD
CN101826881B (zh) * 2010-03-17 2015-06-17 思亚诺移动芯片有限公司 用于根据接收信号的特性来适配接收机接收链组件的方法、电路和系统
US8565352B2 (en) 2010-05-03 2013-10-22 Telefonaktiebolaget L M Ericsson (Publ) Digital IQ imbalance compensation for dual-carrier double conversion receiver
US8483156B2 (en) 2010-05-03 2013-07-09 Nokia Siemens Networks Oy Feedback for inter-radio access technology carrier aggregation
US9031515B2 (en) 2010-06-03 2015-05-12 Broadcom Corporation Transceiver including a weaved connection
US8842582B2 (en) 2010-06-04 2014-09-23 Qualcomm Incorporated Reducing power consumption by taking advantage of superior in-circuit duplexer performance
EP2398285B1 (en) 2010-06-18 2016-11-16 Alcatel Lucent Power saving
WO2012005787A1 (en) 2010-07-08 2012-01-12 Microsemi Corporation Improved architecture for coexistence of multiple band radios
US8493126B2 (en) 2010-07-15 2013-07-23 Qualcomm Incorporated Wideband balun having a single primary and multiple secondaries
WO2012008705A2 (en) 2010-07-16 2012-01-19 Lg Electronics Inc. Transmission method and apparatus for carrier aggregation and uplink mimo
US8437299B2 (en) 2010-08-17 2013-05-07 Qualcomm Incorporated Radio channel aggregation and segmentation
US8310314B2 (en) 2010-09-06 2012-11-13 Mediatek Inc. Signal amplification circuits for receiving/transmitting signals according to input signal
CN102014470B (zh) * 2010-11-30 2014-08-13 中兴通讯股份有限公司 基站功耗控制方法及系统
US9178669B2 (en) 2011-05-17 2015-11-03 Qualcomm Incorporated Non-adjacent carrier aggregation architecture
US9252827B2 (en) 2011-06-27 2016-02-02 Qualcomm Incorporated Signal splitting carrier aggregation receiver architecture
US20120329395A1 (en) 2011-06-27 2012-12-27 Qualcomm Atheros, Inc. Dynamic antenna sharing
US9154179B2 (en) 2011-06-29 2015-10-06 Qualcomm Incorporated Receiver with bypass mode for improved sensitivity
US12081243B2 (en) 2011-08-16 2024-09-03 Qualcomm Incorporated Low noise amplifiers with combined outputs
US9560073B2 (en) 2011-09-08 2017-01-31 Drexel University Reconfigurable antenna based solutions for device authentication and intrusion detection in wireless networks
US9362958B2 (en) 2012-03-02 2016-06-07 Qualcomm Incorporated Single chip signal splitting carrier aggregation receiver architecture
US9172402B2 (en) 2012-03-02 2015-10-27 Qualcomm Incorporated Multiple-input and multiple-output carrier aggregation receiver reuse architecture
US9118439B2 (en) 2012-04-06 2015-08-25 Qualcomm Incorporated Receiver for imbalanced carriers
US9154356B2 (en) 2012-05-25 2015-10-06 Qualcomm Incorporated Low noise amplifiers for carrier aggregation
US9867194B2 (en) 2012-06-12 2018-01-09 Qualcomm Incorporated Dynamic UE scheduling with shared antenna and carrier aggregation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6424683B1 (en) * 1998-01-22 2002-07-23 Infineon Technologies Ag Circuit for demodulating two-dimensional data symbols transmitted by a carrier-based data transmission
US6888888B1 (en) * 2001-06-26 2005-05-03 Microsoft Corporation Simultaneous tuning of multiple channels using intermediate frequency sub-sampling
US20060291428A1 (en) * 2005-06-23 2006-12-28 Filipovic Daniel F Adaptive multi-channel modem
WO2010059257A1 (en) * 2008-11-24 2010-05-27 Cisco Technology, Inc. Offset direct conversion receiver

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JONES W W ET AL: "Narrowband interference suppression using filter-bank analysis/synthesis techniques", MILITARY COMMUNICATIONS CONFERENCE, 1992. MILCOM '92, CONFERENCE RECOR D. COMMUNICATIONS - FUSING COMMAND, CONTROL AND INTELLIGENCE., IEEE SAN DIEGO, CA, USA 11-14 OCT. 1992, NEW YORK, NY, USA,IEEE, US, 11 October 1992 (1992-10-11), pages 898 - 902, XP010060840, ISBN: 978-0-7803-0585-4, DOI: 10.1109/MILCOM.1992.243977 *

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