公开(公告)号：EP2850731A1

公开(公告)日：2015-03-25

申请号：EP13713145.4

申请日：2013-03-25

申请人： Robert Bosch GmbH

发明人： WUCHERT, Thomas ,  KALISCH, Matthias

IPC分类号： H03M1/00 ,  H03M1/06 ,  H04B1/00 ,  G01B9/02 ,  G11B27/36 ,  H03M1/12 ,  H03M1/18 ,  H04L25/00

CPC分类号： H03M1/0626 ,  G01D3/08 ,  H03M1/0629 ,  H03M1/1095 ,  H03M1/12 ,  H03M1/1245 ,  H03M1/183 ,  H03M2201/4233 ,  H04B1/40 ,  H04L5/0007 ,  H04L7/042 ,  H04L25/00 ,  H04L25/03038 ,  H04L27/2647

摘要： The invention relates to a method for interference suppression of a scanning process, wherein the method comprises the method steps of scanning an analogue signal (16) using a scanning frequency f (17) and determining whether an interference amplitude (20) is present. The method is characterised in that, when an interference amplitude (20) is present, the scanning frequency f (17) is increased or decreased and the method is restarted using the method step of scanning the analogue signal (16) using the increased or decreased scanning frequency. The invention further relates to a device for carrying out the method.

公开(公告)号：EP2545653A4

公开(公告)日：2014-04-02

申请号：EP11752766

申请日：2011-02-25

申请人： ROCKSTAR BIDCO LP

发明人： DAVEY JONATHAN ,  JONES RUSSELL

IPC分类号： H04B1/10 ,  H03M1/12

CPC分类号： H03K5/08 ,  H03K5/1534 ,  H03M1/0629 ,  H03M1/12

公开(公告)号：EP0962057A1

公开(公告)日：1999-12-08

申请号：EP98908032.0

申请日：1998-01-27

申请人： TELEFONAKTIEBOLAGET LM ERICSSON

发明人： VAN ZEIJL, Paulus, Thomas, Maria

IPC分类号： H03D1 ,  H03M1

CPC分类号： H03M1/0629 ,  H03M1/12

摘要： A method and a device of sampling an analog signal (U(t)) by obtaining first sequences of discrete sample values (S1I(t), (S1q(t)) of In-phase (I) and Quadrature-phase (Q) components (Ui(t), Uq(t)) of the analog signal (U(t)) and second sequences of discrete sample values (S2I(t), (S2q(t)) of the I and Q components (Ui(t), Uq(t)), by sampling of the I and Q components with sampling sequences (Ζ1(t), Ζ2(t)) having equal sampling rate (φs) and a mutual phase shift of 90° relative to their sampling rate period (T). The sample values of the I component of the first sequence (S1I(t)) and the sample values of the Q component of the second sequence (S2q(t)) are summed (9) to form a third sequence of sample values S3(t). The sample values of the Q component of the first sequence (S1q(t)) and the sample values of the I component of the second sequence (S2I(t)) are summed (10) to form a fourth sequence of sample values (S4(t)). The third and fourth sequences of sample values (S?3(t), (S4¿(t)), are further processed during an interval of a particular period (T) of the third and fourth sequences (S?3(t), (S4¿(t)) and starting after the sample values of the first and second sequences (S1I(t), (S2I(t), (S1q(t)), (S2q(t)) of said period (T) are available.

公开(公告)号：EP3213418B1

公开(公告)日：2018-05-30

申请号：EP14793087.9

申请日：2014-10-31

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： DAS, Sajal Kumar ,  KUPPUSAMY, Vijaykumar

IPC分类号： H04B1/10 ,  H03M1/06

CPC分类号： H04B1/1027 ,  H03M1/0629 ,  H04L27/38

摘要： A method of detecting an obtruding signal in a radio receiver, a receiver and a computer program are disclosed. The receiver has a mixer arranged to mix a received signal to an analog baseband signal at or close to zero-frequency, a filter arranged to low-pass filter said analog baseband signal, and an analog-to-digital converter arranged to sample said filtered analog baseband signal at a sample frequency such that a digital baseband signal is formed. The method comprised receiving a radio frequency signal, mixing the radio frequency signal to the analog baseband signal at or close to zero-frequency, low-pass filtering said analog baseband signal, and analog-to-digital converting said filtered analog baseband signal at an over sample frequency such that a digital baseband signal is formed. The method further comprises frequency translating the digital baseband signal around a Nyquist frequency being based on a nominal sample frequency, the nominal sample frequency being a fraction of the oversampling frequency according to the oversampling rate, to form a translated digital baseband signal such that signal content of the digital baseband signal around zero frequency will be translated to around the nominal sample frequency and vice versa in the translated digital baseband signal, determining a first signal level at zero frequency of the digital baseband signal and a second signal level at zero frequency of the translated digital baseband signal, detecting an obtruding signal based on a relation between the first and second signal levels, and outputting an obtruding signal state signal.

公开(公告)号：EP1368897B1

公开(公告)日：2011-05-04

申请号：EP02721219.0

申请日：2002-03-01

申请人： Optimum Power Technology, L.P.

发明人： DOUGLAS, Robert ,  McCULLOUGH, Geoffrey

IPC分类号： H03M1/12

CPC分类号： H03M1/0629 ,  H03M1/127

摘要： A self-tuning filter is disclosed. The self-tuning filter includes a digital clocking signal and an input coupled to the digital clocking signal, whereby the input reads a value incident on the input when the digital clocking signal changes to a predetermined state. A clock-tunable filter is, furthermore, coupled to the digital clocking signal so that the frequency of the clock-tunable filter is adjusted in relation to a sampling frequency at which the digital clocking signal operates. The self-tuning filter may be applied to an input of a data acquisition unit and applied to an input having a variable sampling frequency. A method of controlling the frequency of a clock-tunable filter is also disclosed.

公开(公告)号：EP1787394A4

公开(公告)日：2008-07-16

申请号：EP05786138

申请日：2005-08-12

申请人： UNIV VIRGINIA

发明人： BUCKNER ZACHARY

IPC分类号： H03M1/48

CPC分类号： G01D5/24476 ,  H03M1/0629 ,  H03M1/48

摘要： An improved encoder interface system, able to track absolute position at higher encoder velocities without aliasing. The device and related apparatus, method and computer program product can perform this operation without loss of precision or accuracy. The improved encoder interface system can predict the phase angle of the signal for each sampling iteration and then measure the angular difference between the predicted phase angle and the actual phase angle to account for acceleration. The predictive capacity of the system thereby minimizes the problem of aliasing. As a result of this technique, aliasing will only occur when the acceleration of the object being observed exceeds a certain threshold that, like the Nyquist frequency, is dependent on the sampling rate of the signal acquisition component. Importantly, in most applications, this acceleration limit greatly exceeds any possible acceleration that the system will undergo.

公开(公告)号：EP1787394A2

公开(公告)日：2007-05-23

申请号：EP05786138.7

申请日：2005-08-12

申请人： UNIVERSITY OF VIRGINIA PATENT FOUNDATION

发明人： BUCKNER, Zachary

IPC分类号： H03M1/48

CPC分类号： G01D5/24476 ,  H03M1/0629 ,  H03M1/48

摘要： An improved encoder interface system, able to track absolute position at higher encoder velocities without aliasing. The device and related apparatus, method and computer program product can perform this operation without loss of precision or accuracy. The improved encoder interface system can predict the phase angle of the signal for each sampling iteration and then measure the angular difference between the predicted phase angle and the actual phase angle to account for acceleration. The predictive capacity of the system thereby minimizes the problem of aliasing. As a result of this technique, aliasing will only occur when the acceleration of the object being observed exceeds a certain threshold that, like the Nyquist frequency, is dependent on the sampling rate of the signal acquisition component. Importantly, in most applications, this acceleration limit greatly exceeds any possible acceleration that the system will undergo.