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公开(公告)号：US11711102B2
公开(公告)日：2023-07-25
申请号：US17453144
申请日：2021-11-01
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Moh Lim Sim , Chow Loong Cheah , Jesus F. Corretjer , Kevin Doberstein , Boon Heng Fong , Ariel L. Galan
CPC classification number: H04B1/1027 , H03D3/002 , H04B1/406 , H03D2200/0088
Abstract: A very low intermediate frequency receiver and methods for controlling the same. One method includes providing, using a local oscillator, a first intermediate frequency, detecting, using an interferer detector, an adjacent or alternate channel interference signal and an image of the adjacent or adjacent channel interference signal causing interference with a desired signal, and determining, using an electronic processor, whether the desired signal is an analog signal. In response to determining that the desired signal is an analog signal, the method includes controlling, using the electronic processor, the local oscillator to provide a second intermediate frequency. In response to determining that the desired signal is not an analog signal, the method includes determining, using the electronic processor, a switching condition based on the desired signal, and controlling, using the electronic processor, the local oscillator to provide the second intermediate frequency in response to determining the switching condition.
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公开(公告)号：US09800277B2
公开(公告)日：2017-10-24
申请号：US14913691
申请日：2013-10-11
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Moh Lim Sim , Chow Loong Cheah , Shu Chen , Raviteja Chinta , Yadunandana N Rao , V. C. Prakash V K Chacko
IPC: H04B1/10
CPC classification number: H04B1/1027 , H04B2001/1054
Abstract: A radio frequency (RF) receiver and method of controlling an RF receiver are provided. The method includes receiving an RF signal and down-converting the RF signal to a substantially baseband signal. A direct current (DC) transition is detected in a portion of the substantially baseband signal. The substantially baseband signal is then filtered using a first filter configuration at the portion of the substantially baseband signal including the DC transition and a second filter configuration at a portion of the substantially baseband signal not including the DC transition.
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Patent Agency Ranking
3.发明授权Very low intermediate frequency (VLIF) receiver and method of controlling a VLIF receiver 有权极低中频（VLIF）接收机和控制VLIF接收机的方法公开(公告)号：US09042500B1
公开(公告)日：2015-05-26
申请号：US14109528
申请日：2013-12-17
Applicant: MOTOROLA SOLUTIONS, INC
Inventor： Yew Leong Wong , Chow Loong Cheah , Li Choo Chen , Yadunandana N Rao , Moh Lim Sim , Ondy Dharma Indra Sukma
CPC classification number: H04B1/30 , H04B1/1036 , H04B2001/1045
Abstract: A very-low intermediate frequency (VLIF) receiver and a method of controlling a VLIF receiver. The method comprises receiving a first signal, the first signal including one or both of an on-channel signal portion and an adjacent channel interferer (ACI) portion; determining that the first signal includes a portion having a strength that is above a threshold; in response to determining that the first signal includes a portion having a strength that is above the threshold, estimating one or more IQ imbalance parameters for at least a portion of the first signal; and compensating for an IQ imbalance in at least the portion of the first signal using the one or more IQ imbalance parameters.
Abstract translation: 一种非常低的中频（VLIF）接收机和一种控制VLIF接收机的方法。 所述方法包括：接收第一信号，所述第一信号包括通道内信号部分和相邻信道干扰源（ACI）部分中的一个或两者; 确定所述第一信号包括具有高于阈值的强度的部分; 响应于确定所述第一信号包括具有高于所述阈值的强度的部分，估计所述第一信号的至少一部分的一个或多个IQ不平衡参数; 以及使用所述一个或多个IQ不平衡参数来补偿所述第一信号的至少所述部分中的IQ不平衡。
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公开(公告)号：US20230140647A1
公开(公告)日：2023-05-04
申请号：US17453144
申请日：2021-11-01
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Moh Lim Sim , Chow Loong Cheah , Jesus F. Corretjer , Kevin Doberstein , Boon Heng Fong , Ariel L. Galan
Abstract: A very low intermediate frequency receiver and methods for controlling the same. One method includes providing, using a local oscillator, a first intermediate frequency, detecting, using an interferer detector, an adjacent or alternate channel interference signal and an image of the adjacent or adjacent channel interference signal causing interference with a desired signal, and determining, using an electronic processor, whether the desired signal is an analog signal. In response to determining that the desired signal is an analog signal, the method includes controlling, using the electronic processor, the local oscillator to provide a second intermediate frequency. In response to determining that the desired signal is not an analog signal, the method includes determining, using the electronic processor, a switching condition based on the desired signal, and controlling, using the electronic processor, the local oscillator to provide the second intermediate frequency in response to determining the switching condition.
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5.发明授权公开(公告)号：US09608679B2
公开(公告)日：2017-03-28
申请号：US14440297
申请日：2012-11-07
Applicant: MOTOROLA SOLUTIONS, INC
Inventor： Chow Loong Cheah , Kim Loy Lai , Kar Boon Oung , Moh Lim Sim , V. C. Prakash V K Chacko
CPC classification number: H04B1/1027 , H03D3/002 , H03D7/18 , H03D2200/0088 , H04B1/109
Abstract: A very low intermediate frequency (VLIF) receiver and a method of controlling a VLIF receiver. The method comprises estimating energy levels in first and second signals and detecting interference from a first adjacent channel interferer based upon a difference in energy in the first and second signals. The first signal comprising a first on-channel portion and an adjacent channel portion and the second signal comprises an intermediate frequency translation of the first on-channel portion. The energy levels are estimated for corresponding time instances and the adjacent channel interferer is of the adjacent channel portion. The VLIF receiver is then controlled based upon the detected interference.
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6.发明申请VERY LOW INTERMEDIATE FREQUENCY (VLIF) RECEIVER AND A METHOD OF CONTROLLING A VLIF RECEIVER 有权非常低的中频（VLIF）接收机和控制VLIF接收机的方法公开(公告)号：US20150295604A1
公开(公告)日：2015-10-15
申请号：US14440297
申请日：2012-11-07
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Chow Loong Cheah , Kim Loy Lai , Kar Boon Oung , Moh Lim Sim , V. C. Prakash V K Chacko
IPC: H04B1/10
CPC classification number: H04B1/1027 , H03D3/002 , H03D7/18 , H03D2200/0088 , H04B1/109
Abstract: A very low intermediate frequency (VLIF) receiver and a method of controlling a VLIF receiver. The method comprises estimating energy levels in first and second signals and detecting interference from a first adjacent channel interferer based upon a difference in energy in the first and second signals. The first signal comprising a first on-channel portion and an adjacent channel portion and the second signal comprises an intermediate frequency translation of the first on-channel portion. The energy levels are estimated for corresponding time instances and the adjacent channel interferer is of the adjacent channel portion. The VLIF receiver is then controlled based upon the detected interference.
Abstract translation: 一种非常低的中频（VLIF）接收机和一种控制VLIF接收机的方法。 该方法包括基于第一和第二信号中的能量差来估计第一和第二信号中的能量水平并检测来自第一相邻信道干扰源的干扰。 第一信号包括第一通道部分和相邻通道部分，第二信号包括第一通道部分的中频转换。 对于相应的时间实例估计能级，并且相邻信道干扰源是相邻信道部分。 然后根据检测到的干扰来控制VLIF接收机。
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公开(公告)号：US20150071392A1
公开(公告)日：2015-03-12
申请号：US14389259
申请日：2012-03-30
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Chow Loong Cheah , Kar boon Oung , V. C. Prakash V K Chacko
IPC: H04B1/12
Abstract: An apparatus and method for reducing FM audio artifacts in a receiver are provided. A direct conversion radio frequency (RF) receiver converts an analog FM signal into a phase shifted digital low IF signal. A digital controller coupled to the analog FM receiver provides adaptive frequency translation for different channel spacing and provides adaptive low IF configuration through the different channel spacing, thereby suppressing audio artifacts.
Abstract translation: 提供了用于减少接收机中的FM音频伪像的装置和方法。 直接转换射频（RF）接收机将模拟FM信号转换为相移数字低IF信号。 耦合到模拟FM接收机的数字控制器为不同的信道间隔提供自适应频率转换，并通过不同的信道间隔提供自适应低IF配置，从而抑制音频伪像。
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