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公开(公告)号：US20220345229A1
公开(公告)日：2022-10-27
申请号：US17635371
申请日：2020-09-01
申请人： Phazr, Inc.
IPC分类号： H04B15/06 , H04B7/0413
摘要： Disclosed is a system for mitigating unwanted emissions in an integrated antenna in which the uplink and downlink RF processing chains are located in close proximity and shielding is impractical. The system involves orienting the uplink and downlink processing chains and physically locating them relative to each other so that applying selective phase biases to their local oscillators results in local oscillator leakage from adjacent RF processing chains to have an out of phase relationship relative to each other. This mitigates unwanted emission from local oscillator signals leakage from the RF processing chains' mixers by angularly dispersing the unwanted emissions and attenuating the unwanted emissions through destructive interference.
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公开(公告)号：US11405927B2
公开(公告)日：2022-08-02
申请号：US16901802
申请日：2020-06-15
发明人： Akash Kumar , Amit Jain , Ankita
IPC分类号： H04W72/08 , H04W72/04 , H04W4/02 , H04L5/00 , H04W72/12 , H04W76/28 , H04B15/04 , H04B15/06 , H04B15/00
摘要： Methods and systems are disclosed for concurrent transmission or resource blocks allocated to a mobile device for transmission in uplink communication channels. In particular implementations, a mobile device may tune local oscillators and/or apply filtering of radio frequency transmission to reduce or mitigate intermodulation distortion potentially affecting one or more radio frequency receiving functions.
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公开(公告)号：US20210242947A1
公开(公告)日：2021-08-05
申请号：US17238775
申请日：2021-04-23
发明人： Joakim Hallin
摘要： A mixer circuitry comprises a mixer, a local oscillator (LO) leakage detector, a digital LO leakage cancellation controller and a DAC arrangement. The mixer is configured to mix a first LO signal having an LO frequency fLO with an intermediate frequency (IF) signal and generate an output signal, i.e. a wanted signal. The LO leakage detector measures the LO leakage at the output of the mixer in the presence of the wanted signal. Then in the digital LO leakage cancellation controller, a digital algorithm is run that automatically adjusts the LO leakage in the mixer by steering the digital-to-analog converter arrangement such that the intermediate frequency input signal level to the mixer is adjusted.
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公开(公告)号：US20200314867A1
公开(公告)日：2020-10-01
申请号：US16901802
申请日：2020-06-15
发明人： Akash KUMAR , Amit JAIN , Ankita
IPC分类号： H04W72/08 , H04W72/04 , H04W4/02 , H04L5/00 , H04W72/12 , H04W76/28 , H04B15/04 , H04B15/06 , H04B15/00
摘要： Methods and systems are disclosed for concurrent transmission or resource blocks allocated to a mobile device for transmission in uplink communication channels. In particular implementations, a mobile device may tune local oscillators and/or apply filtering of radio frequency transmission to reduce or mitigate intermodulation distortion potentially affecting one or more radio frequency receiving functions.
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公开(公告)号：US10567017B2
公开(公告)日：2020-02-18
申请号：US16413622
申请日：2019-05-16
申请人： MEDIATEK INC.
发明人： Zong-You Li , Chi-Yao Yu , Chung-Yun Chou , Yen-Horng Chen
摘要： The present invention provides a receiver having an input node, a blocker detector, a translational filter and a low-noise amplifier. The input node is arranged to receive an input signal. The blocker detector is configured to detect if the input signal has a blocker to generate a detection result. The translational filter is configured to filter out an output-of-band blocker of the input signal to generate a filtered input signal at the input node or not filter output the output-of-band blocker of the input signal according to the detection result. The low-noise amplifier is configured to receive the filtered input signal or the input signal to generate an amplified input signal.
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6.发明申请公开(公告)号：US20190386692A1
公开(公告)日：2019-12-19
申请号：US16413622
申请日：2019-05-16
申请人： MEDIATEK INC.
发明人： Zong-You Li , Chi-Yao Yu , Chung-Yun Chou , Yen-Horng Chen
摘要： The present invention provides a receiver having an input node, a blocker detector, a translational filter and a low-noise amplifier. The input node is arranged to receive an input signal. The blocker detector is configured to detect if the input signal has a blocker to generate a detection result. The translational filter is configured to filter out an output-of-band blocker of the input signal to generate a filtered input signal at the input node or not filter output the output-of-band blocker of the input signal according to the detection result. The low-noise amplifier is configured to receive the filtered input signal or the input signal to generate an amplified input signal.
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7.发明授权公开(公告)号：US10003415B1
公开(公告)日：2018-06-19
申请号：US15404142
申请日：2017-01-11
发明人： Hong Jiang , Zhihang Zhang , Wael Al-Qaq
摘要： A system, computer readable medium, and method are provided for calibrating a wireless transmitter. A transceiver that includes a radio frequency transmitter, a measurement receiver, and a local oscillator unit may be calibrated by adjusting the duty cycle of the radio frequency signals generated by the local oscillator unit. The method for calibrating the wireless transmitter includes the steps of collecting measurement data corresponding to a number of pre-defined duty ratio correction factors, calculating estimated optimum duty ratio correction factors based on the measurement data, and determining a final optimum duty ratio correction factor from the estimated optimum duty ratio correction factors. The pre-defined duty ratio correction factors may be selected to simplify the calculations for choosing the final optimum duty ratio correction factor. The wireless transmitter can be calibrated by configuring the local oscillator unit based on the final optimum duty ratio correction factor.
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8.发明授权公开(公告)号：US09948237B2
公开(公告)日：2018-04-17
申请号：US15605248
申请日：2017-05-25
发明人： Scott R. Anderson , Ted J. Beck
CPC分类号： H03D7/14 , H04B1/006 , H04B1/40 , H04B7/0413 , H04B15/06 , H04L27/2626 , H04L27/2647
摘要： Devices and methods are disclosed for generating, filtering, and amplifying signals that are sent and received using SOCs. These improved methods and devices advantageously provide filtering of composite RF signals such that the RF signals can be transmitted with an improved SNR. Such filtered signals can then be transmitted at a higher power. Because filtering is performed at an intermediate frequency, the higher cost of low-noise RF-transmitters and/or RF filtering components can be avoided. Accordingly, less expensive (e.g., noisier) components, such as readily available wireless transceiver SOCs, can be used for generating RF signals, filtering the signals, and then transmitting the filtered signals at higher power. As a result of these devices and methods, inexpensive SOCs may be used at higher powers and over longer ranges than would be normally expected.
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公开(公告)号：US20180013458A1
公开(公告)日：2018-01-11
申请号：US15700199
申请日：2017-09-11
申请人： MEDIATEK INC.
发明人： Ying-Tsang Lu , Yen-Hung Kuo , Yuan-Yu Fu , Chinq-Shiun Chiu
CPC分类号： H04B1/1018 , H04B1/0053 , H04B1/1036 , H04B1/1607 , H04B15/06
摘要： A multi-mixer system includes an amplifier module and a plurality of channels. The amplifier module is arranged for receiving signals from an antenna or antenna arrays to generate a plurality of radio frequency (RF) input signals. The plurality of channels are coupled to the amplifier module, wherein the plurality of channels receive the RF input signals, respectively, and each of the channels includes a mixer for mixing one of the RF input signals with a local oscillating signal to generate a mixed signal. In addition, at least one of the channels includes an interference reduction circuit positioned between the amplifier module and the mixer.
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公开(公告)号：US09859992B1
公开(公告)日：2018-01-02
申请号：US14879584
申请日：2015-10-09
申请人： Exelis Inc.
摘要： A multi-tier interference canceler includes a first canceler, a second canceler, and a third canceler. The first canceler samples radio frequency (RF) interference generated from a linear signal using a non-linear process. The RF interference includes linear interference and non-linear interference. The first canceler cancels the linear interference from the sampled RF interference based on the linear signal to produce a first non-linear interference sample. The second canceler receives an amplitude scaled, time-shifted version of the RF interference and cancels the linear interference from the received RF interference based on the linear signal to produce a second non-linear interference sample. The third canceler cancels the non-linear interference from the second non-linear interference sample using the first non-linear interference sample, to produce a receive signal that is substantially free of the non-linear interference and the linear interference.
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