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公开(公告)号：US10382231B2
公开(公告)日：2019-08-13
申请号：US15641881
申请日：2017-07-05
Applicant: NXP B.V.
Inventor： Wim van Houtum
IPC: H04L25/02 , H04L5/00 , H04B17/309 , H04L27/26 , H04L1/00
Abstract: A receiver circuit comprising an averaging-processing-block that is configured to receive an OFDM signal. The OFDM signal comprises a plurality of sample-values, wherein the sample-values comprise: a middle-sample-value; a lower-sample-value-group; and a higher-sample-value-group. The averaging-processing-block can determine an averaged-sample-value for the middle-sample-value by performing an averaging operation on the sample-values of the lower-sample-value-group and the higher-sample-value-group, but not on the middle-sample-value.
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公开(公告)号：US10003440B2
公开(公告)日：2018-06-19
申请号：US15403887
申请日：2017-01-11
Applicant: NXP B.V.
Inventor： Wim van Houtum
CPC classification number: H04L5/0007 , H04B1/1027 , H04B1/123 , H04B1/16
Abstract: A receiver circuit comprising: an input terminal configured to receive an input-signal; an interfering-signal-strength-calculator configured to determine an interfering-signal-strength-indicator based on the input signal; a compensation-block configured to apply a co-channel-interference compensation operation to the input-signal in order to generate a compensated-input-signal; a compensation-weighting-component configured to apply a compensation-weighting-factor to the compensated-input-signal in order to generate a weighted-compensated-input-signal, wherein the compensation-weighting-factor is based on the interfering-signal-strength-indicator; a delay-block configured to apply a delay to the input-signal in order to generate a delayed-input-signal; a delayed-weighting-component configured to apply a delayed-weighting-factor to the delayed-input-signal in order to generate a weighted-delayed-input-signal, wherein the delayed-weighting-factor is based on the interfering-signal-strength-indicator; and a signal-combiner configured to combine the weighted-delayed-input-signal and the weighted-compensated-input-signal in order to provide a combined-input-signal for demodulation.
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公开(公告)号：US20170331545A1
公开(公告)日：2017-11-16
申请号：US15590421
申请日：2017-05-09
Applicant: NXP B.V.
Inventor： Wim van Houtum , Yan Wu
CPC classification number: H04B7/086 , G01S3/06 , G01S3/26 , G01S3/36 , G01S3/46 , G01S3/48 , H04B7/12
Abstract: A receiver system comprising: an input terminal configured to receive input signalling comprising a plurality of antenna-signals, wherein the plurality of antenna-signals each comprise information that corresponds to a first-frequency-bin and a second-frequency-bin. AoA-blocks can determine a first-angle-of-arrival and a second-angle-of-arrival associated with the first- and second-frequency-bins. A first-weighting-determination-block configured to, based on the first-angle-of-arrival and the second-angle-of-arrival, either: set first-weighting-values as values for constructively combining the information that corresponds to the first-frequency-bins of the plurality of antenna-signals; or set first-weighting-values as values for destructively combining the information that corresponds to the first-frequency-bins of the plurality of antenna-signals.
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公开(公告)号：US20170214499A1
公开(公告)日：2017-07-27
申请号：US15403887
申请日：2017-01-11
Applicant: NXP B.V.
Inventor： Wim van Houtum
CPC classification number: H04L5/0007 , H04B1/1027 , H04B1/123 , H04B1/16
Abstract: A receiver circuit comprising: an input terminal configured to receive an input-signal; an interfering-signal-strength-calculator configured to determine an interfering-signal-strength-indicator based on the input signal; a compensation-block configured to apply a co-channel-interference compensation operation to the input-signal in order to generate a compensated-input-signal; a compensation-weighting-component configured to apply a compensation-weighting-factor to the compensated-input-signal in order to generate a weighted-compensated-input-signal, wherein the compensation-weighting-factor is based on the interfering-signal-strength-indicator; a delay-block configured to apply a delay to the input-signal in order to generate a delayed-input-signal; a delayed-weighting-component configured to apply a delayed-weighting-factor to the delayed-input-signal in order to generate a weighted-delayed-input-signal, wherein the delayed-weighting-factor is based on the interfering-signal-strength-indicator; and a signal-combiner configured to combine the weighted-delayed-input-signal and the weighted-compensated-input-signal in order to provide a combined-input-signal for demodulation.
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公开(公告)号：US20150358040A1
公开(公告)日：2015-12-10
申请号：US14296046
申请日：2014-06-04
Applicant: NXP B.V.
Inventor： Wim van Houtum , Kave Kianush
IPC: H04B1/10
CPC classification number: H04B1/10 , H04B1/109 , H04B1/406 , H04B7/0848
Abstract: Various aspects of the disclosure are directed to steering antennas for receiving signals. As may be implemented in accordance with one or more embodiments, an apparatus includes two or more antennas that receive radio signals, a first circuit that directs the antennas and a second circuit that combines signals received by the antennas. The first circuit operates in a first mode by electronically directing the antennas using an analog portion of received signals to modify a radiation pattern of the receive antennas, based on estimated phase-shifts and/or estimated amplitude of the signals. In a second mode, the first circuit uses a digitally-modulated portion of the signals to electronically direct the antennas by modifying the radiation pattern of the receive antennas based on at least one of estimated phase-shifts and estimated amplitude of the signals. Accordingly, null-steering can be effected to eliminate interference.
Abstract translation: 本公开的各个方面涉及用于接收信号的转向天线。 如可以根据一个或多个实施例实现的，装置包括接收无线电信号的两个或更多个天线，引导天线的第一电路和组合由天线接收的信号的第二电路。 第一电路以第一模式工作，通过使用接收信号的模拟部分电子地引导天线，以基于估计的相移和/或信号的估计幅度来修改接收天线的辐射图。 在第二模式中，第一电路使用信号的数字调制部分来基于估计的相移和信号的估计幅度中的至少一个，通过修改接收天线的辐射模式来电子地引导天线。 因此，可以进行零转向以消除干扰。
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Patent Agency Ranking
公开(公告)号：US20190356347A1
公开(公告)日：2019-11-21
申请号：US15982029
申请日：2018-05-17
Applicant: NXP B.V.
Inventor： Wim van Houtum
Abstract: A communications device includes aspects for improving reception of transmissions with first-adjacent co-channel interference signals corresponding to digitally-modulated side-bands of in-band on-channel (IBOC) broadcasted signals. The communications device may include a radio frequency (RF) signal-reception circuit including two RF-signal paths driven in response to signals received via at least two respective antennas, and configured to respond to signals carried in the respective RF-signal paths by providing pre-processed RF output signals. The communications device may further include a beam-forming circuit driven in response to signals received at the at least two respective antennas and configured and arranged to facilitate first-adjacent interference cancellation (FAC). The communications device can also include an interference-cancelling circuit configured and arranged to reduce the first-adjacent co-channel interference signals by combining a beam-forming output signal provided by the beam-forming circuit with the pre-processed RF output signals as part of a maximum ratio combining (MRC) process.
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公开(公告)号：US09838100B2
公开(公告)日：2017-12-05
申请号：US14546576
申请日：2014-11-18
Applicant: NXP B.V.
Inventor： Wim van Houtum
CPC classification number: H04B7/0617 , H04B1/1036
Abstract: Various exemplary embodiments relate to a method for improving reception of transmissions with first adjacent interference signals, the method including selecting one or more time samples from each of two or more antennas; generating a lower first adjacent interference (LFAI) signal, a desired signal, and an upper first adjacent interference (UFAI) signal for each of the time samples; calculating a lower weighting co-efficient based on the LFAI signal; calculating a middle weighting co-efficient based on the desired signal; calculating a upper weighting co-efficient based on the UFAI signal; combining the lower weighting co-efficient with a filtered LFAI signal into a weighted lower signal; combining the middle weighting co-efficient with a filtered desired signal into a weighted middle signal; combining the upper weighting co-efficient with a filtered UFAI signal into a weighted upper signal; and combining the weighted lower signal, the weighted middle signal, and the weighted upper signal.
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公开(公告)号：US09602231B2
公开(公告)日：2017-03-21
申请号：US14527396
申请日：2014-10-29
Applicant: NXP B.V.
Inventor： Wim van Houtum
CPC classification number: H04J11/0066 , H04H20/30 , H04H2201/183 , H04L27/2647 , H04L27/265
Abstract: The invention provides a reception method and apparatus which provides a series of frequency shifts and filtering operations to sideband signals (lower, upper, and middle), to enable detection if the central part of a signal is analog or digital, and to enable effective co-channel interference compensation. The invention enables (H)IBOC signals for example to be processed with a narrower bandwidth and therefore a lower processing clock speed and complexity is made possible compared to the conventional (H)IBOC-signal processing approach.
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公开(公告)号：US10523474B1
公开(公告)日：2019-12-31
申请号：US16006989
申请日：2018-06-13
Applicant: NXP B.V.
Inventor： Yunus Can Gultekin , Wim van Houtum , Frans M. J. Willems , Semih Serbetli
Abstract: Certain aspects of the disclosure are directed to a method for communicating data from a transmitting circuit to a receiving circuit over a noisy channel. The method can be performed by logic circuitry, and can include encoding data, for transmission over the noisy channel. The data can be encoded, as a shaped-coded modulation signal by shaping the signal based on an amplitude selection algorithm that leads to a symmetrical input and by constructing a trellis having a bounded-energy sequence of amplitude values selected by computing and storing a plurality of channel-related energy constraints based on use of a nonlinear-estimation process, and therein providing an index for the bounded-energy sequence of amplitudes. The method can also include receiving over the noisy channel, the shaped-coded modulation signal, and decoding the data from the shaped-coded modulation signal by using the index to reconstruct the bounded-energy sequence of amplitudes.
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公开(公告)号：US20190386857A1
公开(公告)日：2019-12-19
申请号：US16006989
申请日：2018-06-13
Applicant: NXP B.V.
Inventor： Yunus Can Gultekin , Wim van Houtum , Frans M.J. Willems , Semih Serbetli
Abstract: Certain aspects of the disclosure are directed to a method for communicating data from a transmitting circuit to a receiving circuit over a noisy channel. The method can be performed by logic circuitry, and can include encoding data, for transmission over the noisy channel. The data can be encoded, as a shaped-coded modulation signal by shaping the signal based on an amplitude selection algorithm that leads to a symmetrical input and by constructing a trellis having a bounded-energy sequence of amplitude values selected by computing and storing a plurality of channel-related energy constraints based on use of a nonlinear-estimation process, and therein providing an index for the bounded-energy sequence of amplitudes. The method can also include receiving over the noisy channel, the shaped-coded modulation signal, and decoding the data from the shaped-coded modulation signal by using the index to reconstruct the bounded-energy sequence of amplitudes.
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