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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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公开(公告)号：US10510240B2
公开(公告)日：2019-12-17
申请号：US16394960
申请日：2019-04-25
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Shyan Jenq Ho , V. C. Prakash V K Chacko , Kai Boon Khoo , Mohd Hisham Muddin Che At , Wei Ling Cecilia Liaw
Abstract: Methods and systems for evaluating compliance of communication of a dispatcher. One system includes an electronic computing device that includes an input device, a transceiver, and one or more electronic processors. The one or more electronic processors are configured to monitor communication between a dispatcher and a caller during a call and determine a type of call. The one or more electronic processors are further configured to determine a conversational procedure based on the type of call and compare a characteristic of the monitored communication to a constraint of the conversational procedure. The one or more electronic processors are further configured to determine that the characteristic of the monitored communication is outside the constraint of the conversational procedure and take an action as a function of determining that the characteristic of the monitored communication is outside the constraint of the conversational procedure.
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Patent Agency Ranking
公开(公告)号：US20210297150A1
公开(公告)日：2021-09-23
申请号：US16821765
申请日：2020-03-17
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： V. C. Prakash V K Chacko , Yi Lynn Kok , Wai Mun Lee , Siew Im Low
Abstract: Portable communications device and method for full duplex operation in a time division multiple access radio system. The method includes providing a switch for connecting one of a first voltage controlled oscillator and a second voltage controlled oscillator to a synthesizer. The synthesizer generates a first frequency when connected to the first voltage controlled oscillator and generates a second frequency when connected to the second voltage controlled oscillator. The method also includes controlling, using an electronic processor coupled to the switch, the switch to connect the first voltage controlled oscillator to the synthesizer for a first timeslot, and controlling, using the electronic processor, the switch to disconnect the first voltage controlled oscillator from the synthesizer and connect the second voltage controlled oscillator to the synthesizer for a second timeslot. The second timeslot is immediately adjacent to the first timeslot.
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公开(公告)号：US11165494B2
公开(公告)日：2021-11-02
申请号：US16821765
申请日：2020-03-17
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： V. C. Prakash V K Chacko , Yi Lynn Kok , Wai Mun Lee , Siew Im Low
Abstract: Portable communications device and method for full duplex operation in a time division multiple access radio system. The method includes providing a switch for connecting one of a first voltage controlled oscillator and a second voltage controlled oscillator to a synthesizer. The synthesizer generates a first frequency when connected to the first voltage controlled oscillator and generates a second frequency when connected to the second voltage controlled oscillator. The method also includes controlling, using an electronic processor coupled to the switch, the switch to connect the first voltage controlled oscillator to the synthesizer for a first timeslot, and controlling, using the electronic processor, the switch to disconnect the first voltage controlled oscillator from the synthesizer and connect the second voltage controlled oscillator to the synthesizer for a second timeslot. The second timeslot is immediately adjacent to the first timeslot.
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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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