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11 条记录 (耗时 0.016 秒)

    DELAY EQUALIZATION IN WIRELESS COMMUNICATION SYSTEMS
    1.
    发明公开
    DELAY EQUALIZATION IN WIRELESS COMMUNICATION SYSTEMS 审中-公开
    延迟补偿在无线通信系统

    公开(公告)号：EP1264361A1

    公开(公告)日：2002-12-11

    申请号：EP01913175.4

    申请日：2001-02-28

    申请人： ISCO International, Inc.

    发明人： ABDELMONEM, Amr ,  REMILLARD, Stephen, K.

    IPC分类号： H01P1/208

    CPC分类号： H01P1/208

    摘要： A receive front-end useful for receiving a communication signal includes a bandpass filter having a high selectivity for selecting a passband of the communication signal, an equalizer to compensate for group delay variance introduced by the high selectivity of the bandpass filter, and a low noise amplifier protected by the bandpass filter from signals outside the passband and coupled to the equalizer to establish noise figure for the receive front-end. The filter may be self-equalizing to provide all or a portion of the requisit delay compensation, and both the filter and the equalizer may include high-temperature superconducting components.

    MAINTAINING PERFORMANCE QUALITY OF BROADBAND SYSTEM IN THE PRESENCE OF NARROW BAND INTERFERENCE
    2.
    发明公开
    MAINTAINING PERFORMANCE QUALITY OF BROADBAND SYSTEM IN THE PRESENCE OF NARROW BAND INTERFERENCE 有权
    MAINTAIN宽带传输系统的质量在存在窄带干扰的情况下

    公开(公告)号：EP1243077A1

    公开(公告)日：2002-09-25

    申请号：EP00902521.4

    申请日：2000-02-02

    申请人： ISCO International, Inc.

    发明人： JAGGER, Charles, E. ,  WILLETTS, Mark, N. ,  TOBIA, Micolino

    IPC分类号： H04B1/12

    CPC分类号： H04B1/71 ,  H04B1/1036

    摘要： A method and device which dynamically detects, tracks and filters interfering signals with sufficient speed (i.e. within one IS-95 CDMA data frame period, or 20ms) and fidelity to eliminate or greatly reduce the deleterious effects of narrow band interferor signals on a CDMA link. When inserted in an RF signal path an Adaptive Notch Filter (ANF) detects narrow band interferors above a threshold level within the CDMA signal. Detection is accomplished by continuous scanning of a preset excision band, e.g. a specified narrow band associated with an AMPS system. Detected interferors are then automatically acquired and suppressed. This is achieved by electronically placing a rejection notch at the frequency of the interferors. Multiple notch filters may be used to simultaneously suppress multiple interferors. In the absence of interferors a bypass mode is selected allowing the RF signal to bypass the notch. Upon detection of an interferor, a switch is made to a suppression mode where the interferor is steered through a first notch section and suppressed. Alternatively, an external control line may be used to select the bypass mode so that the signal is allowed to pass the notch section, regardless of interferor content.

    SELF-ADAPTIVE DIGITAL RF BANDPASS AND BANDSTOP FILTER ARCHITECTURE
    3.
    发明公开
    SELF-ADAPTIVE DIGITAL RF BANDPASS AND BANDSTOP FILTER ARCHITECTURE 审中-公开
    SELBSTANPASSENDD DIGITALE HF-BANDPASS- UND BANDSTOP-FILTERARCHITEKTUR

    公开(公告)号：EP2371162A4

    公开(公告)日：2014-04-09

    申请号：EP09826740

    申请日：2009-11-12

    申请人： ISCO INTERNATIONAL INC

    发明人： ABDELMONEM AMR ,  CORDONE SEAN S

    IPC分类号： H04W28/16 ,  H04B1/10

    CPC分类号： H04B1/7103 ,  H04B1/1036 ,  H04B1/707 ,  H04B1/7093 ,  H04B17/318 ,  H04B17/345 ,  H04B2001/1072 ,  H04J11/0023 ,  H04L27/0006 ,  H04L27/2601 ,  H04L43/16 ,  H04W24/08 ,  H04W48/16 ,  H04W72/02 ,  H04W72/0453 ,  H04W72/085 ,  H04W88/06 ,  H04W88/10

    摘要： A system and method provides adaptive digital front end control of an incoming radio frequency (RF) signal to identify RF characteristics in that signal, such as interference or desired data signals and adaptively control digital filter elements to selectively tune only portions of the RF signal to produce a filtered output signal, on a per cycle basis, prior to communicating the RF signal to an underlying wireless communication device, such as a base station in cellular network, cellular phone, wireless router base station, cognitive radio, or other wireless communication device. Each digital filter element may be tuned in frequency and bandwidth of operation and collectively the elements form an adaptive filter stage with elements configurable into both bandpass and bandstop filters for cascaded operation.

    摘要翻译： 系统和方法提供对输入射频（RF）信号的自适应数字前端控制，以识别该信号中的RF特性，例如干扰或期望的数据信号，并自适应地控制数字滤波器元件以仅选择性地调谐RF信号的部分 在将RF信号传送到诸如蜂窝网络中的基站，蜂窝电话，无线路由器基站，认知无线电或其他无线通信设备之类的基础无线通信设备之前，在每个周期的基础上产生滤波的输出信号 。 每个数字滤波器元件可以在操作的频率和带宽中调谐，并且这些元件共同形成自适应滤波器级，其中元件可配置成用于级联操作的带通和带阻滤波器。

    MULTIPLE CARRIER ADAPTIVE NOTCH FILTER
    4.
    发明公开
    MULTIPLE CARRIER ADAPTIVE NOTCH FILTER 有权
    自适应多载波陷波滤波器

    公开(公告)号：EP1506622A1

    公开(公告)日：2005-02-16

    申请号：EP03736669.7

    申请日：2003-05-19

    申请人： ISCO International, Inc.

    发明人： CORDONE, Sean ,  NGUYEN, Tan, D.

    IPC分类号： H04B1/10

    CPC分类号： H04B1/1036 ,  H04B1/1027 ,  H04B1/123 ,  H04B1/71

    摘要： A multiple carrier adaptive notch filter (ANF) module selectively filters a received wideband communication signal To determine the presence of narrowband interference, the multiple carrier ANF module scans various known narrowband channels that lie within the frequency spectrum of the wideband communication signal and determines signal strengths for each of the narrowband channels. The signal strengths from the narrowband channels are compared to a threshold that is derived from a statistical combination of the narrowband signal strengths. Narrowband channels having signal strengths that are greater than the threshold are determined to have interference.

    METHOD AND APPARATUS FOR DETECTING INTERFERENCE OF NARROWBAND CHANNELS OVER A WIDEBAND SYSTEM
    5.
    发明公开
    METHOD AND APPARATUS FOR DETECTING INTERFERENCE OF NARROWBAND CHANNELS OVER A WIDEBAND SYSTEM 有权
    方法与电路窄带信道在宽带系统的干扰检测

    公开(公告)号：EP1922821A1

    公开(公告)日：2008-05-21

    申请号：EP06802715.0

    申请日：2006-08-31

    申请人： ISCO International, Inc.

    发明人： CORDONE, Sean, S.

    IPC分类号： H04B1/707 ,  H04B1/10

    CPC分类号： H04B1/1036 ,  H04B1/109 ,  H04B17/345 ,  H04B2201/709709

    摘要： A system and/or a method for detecting interference using correlation may be used in a communication system to protect against, or to report the presence of, narrowband interference, which has deleterious effects on the performance of the wideband communication system. The interference detection system described herein may be used to determine presence of narrowband interference by calculating correlation factors for a plurality of narrowband channels disposed within the wideband communication system and comparing the correlation factors with a threshold correlation factor.

    MULTIPLE CARRIER ADAPTIVE NOTCH FILTER
    7.
    发明公开
    MULTIPLE CARRIER ADAPTIVE NOTCH FILTER 有权
    自适应多载波陷波滤波器

    公开(公告)号：EP1506622A4

    公开(公告)日：2005-08-03

    申请号：EP03736669

    申请日：2003-05-19

    申请人： ISCO INTERNATIONAL INC

    发明人： CORDONE SEAN ,  NGUYEN TAN D

    IPC分类号： H04B1/10 ,  H04B1/12 ,  H04B1/707

    CPC分类号： H04B1/1036 ,  H04B1/1027 ,  H04B1/123 ,  H04B1/71

    摘要： A multiple carrier adaptive notch filter (ANF) module selectively filters a received wideband communication signal To determine the presence of narrowband interference, the multiple carrier ANF module scans various known narrowband channels that lie within the frequency spectrum of the wideband communication signal and determines signal strengths for each of the narrowband channels. The signal strengths from the narrowband channels are compared to a threshold that is derived from a statistical combination of the narrowband signal strengths. Narrowband channels having signal strengths that are greater than the threshold are determined to have interference.

    Multiple carrier adaptive notch filter
    10.
    发明授权
    Multiple carrier adaptive notch filter 有权
    自适应多载波陷波滤波器

    公开(公告)号：EP1506622B1

    公开(公告)日：2009-07-15

    申请号：EP03736669.7

    申请日：2003-05-19

    申请人： ISCO International, Inc.

    发明人： CORDONE, Sean ,  NGUYEN, Tan, D.

    IPC分类号： H04B1/10

    CPC分类号： H04B1/1036 ,  H04B1/1027 ,  H04B1/123 ,  H04B1/71

    摘要： A multiple carrier adaptive notch filter (ANF) module selectively filters a received wideband communication signal To determine the presence of narrowband interference, the multiple carrier ANF module scans various known narrowband channels that lie within the frequency spectrum of the wideband communication signal and determines signal strengths for each of the narrowband channels. The signal strengths from the narrowband channels are compared to a threshold that is derived from a statistical combination of the narrowband signal strengths. Narrowband channels having signal strengths that are greater than the threshold are determined to have interference.