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公开(公告)号：US20180124716A1
公开(公告)日：2018-05-03
申请号：US15472943
申请日：2017-03-29
Applicant: QUALCOMM Incorporated
Inventor： Sudarsan Krishnan , Andrei Izotov , Carl Hardin , Vijay Chellappa , Li Gao
IPC: H04W52/52
CPC classification number: H04W52/52 , H03F1/00 , H03F1/0272 , H03F1/3247 , H03F3/19 , H03F3/245 , H03F2200/451 , H04L49/109 , H04Q2213/13199
Abstract: A radio frequency (RF) system including: a modem configured to generate a first set of digital bits and to create an analog RF signal from those digital bits; a power amplifier configured to receive the analog RF signal and to amplify the analog RF signal, the power amplifier including an input for a biasing voltage; a feedback loop configured to sample an output of the power amplifier, generate a second set of digital bits corresponding to the first set of digital bits, digitally process the second set of digital bits to determine a linearity characteristic of the power amplifier, and to adjust the biasing voltage in response to determining the linearity characteristic.
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公开(公告)号：US20170366209A1
公开(公告)日：2017-12-21
申请号：US15274941
申请日：2016-09-23
Applicant: QUALCOMM Incorporated
Inventor： Haim Mendel Weissman , Igor Gutman , Joseph Patrick Burke , Vijay Chellappa , Sumit Verma , Paul Draxler
CPC classification number: H04B1/0475 , H04B17/23 , H04B17/24 , H04B17/309 , H04B17/354 , H04B17/373 , H04B2001/0433 , H04L27/38
Abstract: Systems and methods for providing indications about the TX RF non-linear impairments are disclosed. In accordance with some implementations, a first device (UE or base station) estimates EVM indications for the signal and determines if the EVM indications is above a threshold. The first device may transmit the estimated TX non-linearity indications such as AM-AM, AM-PM, Volterra coefficients, and/or other performance metrics to a second device, that transmitted the signal, when it is determined that the EVM indications is above the threshold. Systems and methods for wireless communication impairment correction are also disclosed wherein, in accordance with some implementations, a first device receives estimated TX non-linearity indications such as AM-AM, AM-PM, and/or Volterra coefficients from a second device and performs non-linear correction of a transmit signal for the second receiver device based at least in part on the EVM indications. Other aspects, embodiments, and features are also claimed and described.
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公开(公告)号：US09762274B2
公开(公告)日：2017-09-12
申请号：US14664622
申请日：2015-03-20
Applicant: QUALCOMM Incorporated
Inventor： Shailesh Shekhar Rai , Mahim Ranjan , Jeremy Mark Goldblatt , Frederic Bossu , Vijay Chellappa
CPC classification number: H04B1/12 , H04B1/0475 , H04B15/00 , H04B2001/0416
Abstract: An apparatus includes an elliptical inductance-capacitance (LC) filter and a resistive-capacitive (RC) notch filter serially coupled to the elliptical LC filter. The elliptical LC filter and the RC notch filter are configured to filter a radio-frequency (RF) signal received by a feedback receive path.
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Patent Agency Ranking
公开(公告)号：US20180219566A1
公开(公告)日：2018-08-02
申请号：US15940258
申请日：2018-03-29
Applicant: QUALCOMM Incorporated
Inventor： Haim Mendel Weissman , Igor Gutman , Joseph Patrick Burke , Vijay Chellappa , Sumit Verma , Paul Draxler
IPC: H04B1/04 , H04L27/38 , H04B17/354 , H04B17/373 , H04B17/23 , H04B17/309 , H04B17/24
CPC classification number: H04B1/0475 , H04B17/23 , H04B17/24 , H04B17/309 , H04B17/354 , H04B17/373 , H04B2001/0433 , H04L5/0091 , H04L27/38
Abstract: Systems and methods for providing indications about the TX RF non-linear impairments are disclosed. In accordance with some implementations, a first device (UE or base station) estimates EVM indications for the signal and determines if the EVM indications is above a threshold. The first device may transmit the estimated TX non-linearity indications math as AM-AM, AM-PM, Volterra coefficients, and/or other performance metrics to a second device, that transmitted the signal, when it is determined that the EVM indications is above the threshold. Systems and methods for wireless communication impairment correction are also disclosed wherein, in accordance with some implementations, a first device receives estimated TX non-linearity indications such as AM-AM, AM-PM, and/or Volterra coefficients from a second device and performs non-linear correction of a transmit signal for the second receiver device based at least in part on the EVM indications. Other aspects, embodiments, and features are also claimed and described.
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公开(公告)号：US09960794B2
公开(公告)日：2018-05-01
申请号：US15274941
申请日：2016-09-23
Applicant: QUALCOMM Incorporated
Inventor： Haim Mendel Weissman , Igor Gutman , Joseph Patrick Burke , Vijay Chellappa , Sumit Verma , Paul Draxler
IPC: H04L27/38 , H04B1/04 , H04B17/23 , H04B17/24 , H04B17/309 , H04B17/354 , H04B17/373
CPC classification number: H04B1/0475 , H04B17/23 , H04B17/24 , H04B17/309 , H04B17/354 , H04B17/373 , H04B2001/0433 , H04L27/38
Abstract: Systems and methods for providing indications about the TX RF non-linear impairments are disclosed. In accordance with some implementations, a first device (UE or base station) estimates EVM indications for the signal and determines if the EVM indications is above a threshold. The first device may transmit the estimated TX non-linearity indications such as AM-AM, AM-PM, Volterra coefficients, and/or other performance metrics to a second device, that transmitted the signal, when it is determined that the EVM indications is above the threshold. Systems and methods for wireless communication impairment correction are also disclosed wherein, in accordance with some implementations, a first device receives estimated TX non-linearity indications such as AM-AM, AM-PM, and/or Volterra coefficients from a second device and performs non-linear correction of a transmit signal for the second receiver device based at least in part on the EVM indications. Other aspects, embodiments, and features are also claimed and described.
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公开(公告)号：US10348341B2
公开(公告)日：2019-07-09
申请号：US15940258
申请日：2018-03-29
Applicant: QUALCOMM Incorporated
Inventor： Haim Mendel Weissman , Igor Gutman , Joseph Patrick Burke , Vijay Chellappa , Sumit Verma , Paul Draxler
IPC: H04L27/38 , H04B1/04 , H04B17/23 , H04B17/24 , H04B17/309 , H04B17/354 , H04B17/373 , H04L5/00
Abstract: Systems and methods for providing indications about the TX RF non-linear impairments are disclosed. In accordance with some implementations, a first device (UE or base station) estimates EVM indications for the signal and determines if the EVM indications is above a threshold. The first device may transmit the estimated TX non-linearity indications math as AM-AM, AM-PM, Volterra coefficients, and/or other performance metrics to a second device, that transmitted the signal, when it is determined that the EVM indications is above the threshold. Systems and methods for wireless communication impairment correction are also disclosed wherein, in accordance with some implementations, a first device receives estimated TX non-linearity indications such as AM-AM, AM-PM, and/or Volterra coefficients from a second device and performs non-linear correction of a transmit signal for the second receiver device based at least in part on the EVM indications. Other aspects, embodiments, and features are also claimed and described.
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公开(公告)号：US20160080119A1
公开(公告)日：2016-03-17
申请号：US14484523
申请日：2014-09-12
Applicant: QUALCOMM Incorporated
Inventor： Rema Vaidyanathan , Prasad Srinivasa Siva Gudem , Vijay Chellappa , Chalin Chac Lee , Li Gao , David Coronel
CPC classification number: H04L1/206 , H03L7/06 , H04B3/46 , H04B17/102
Abstract: A method and apparatus for self-testing a GSM/EDGE communications device. An embodiment provides a method of measuring transmit power. A receive phase locked loop (PLL) is inserted into a feedback receiver local oscillator mixer. The receive PLL is then tuned to a local oscillator frequency. Once the tuning is complete, an I and a Q signal are captured using a channel of the feedback receiver. After capture, a I2+Q2 sum is computed, measuring the transmit power. The feedback receiver automatic gain control (AGC) may be used to determine transmit power in place of I2+Q2. The apparatus includes: a modem assembly, a power control assembly, a power amplifier, a duplexer, a coupler and a switch. The power control assembly further includes a first PLL and first and second mixers. The second mixer is connected to a feedback low noise amplifier and receives input from a feedback receiver PLL.
Abstract translation: 一种用于自测试GSM / EDGE通信设备的方法和装置。 实施例提供了一种测量发射功率的方法。 接收锁相环（PLL）插入到反馈接收机本地振荡器混频器中。 然后将接收PLL调谐到本地振荡器频率。 调谐完成后，使用反馈接收器的通道捕获I和Q信号。 捕获后，计算I2 + Q2和，测量发射功率。 反馈接收机自动增益控制（AGC）可用于确定发射功率代替I2 + Q2。 该装置包括：调制解调器组件，功率控制组件，功率放大器，双工器，耦合器和开关。 功率控制组件还包括第一PLL和第一和第二混频器。 第二混频器连接到反馈低噪声放大器，并从反馈接收机PLL接收输入。
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公开(公告)号：US20150349821A1
公开(公告)日：2015-12-03
申请号：US14664622
申请日：2015-03-20
Applicant: QUALCOMM Incorporated
Inventor： Shailesh Shekhar Rai , Mahim Ranjan , Jeremy Mark Goldblatt , Frederic Bossu , Vijay Chellappa
CPC classification number: H04B1/12 , H04B1/0475 , H04B15/00 , H04B2001/0416
Abstract: An apparatus includes an elliptical inductance-capacitance (LC) filter and a resistive-capacitive (RC) notch filter serially coupled to the elliptical LC filter. The elliptical LC filter and the RC notch filter are configured to filter a radio-frequency (RF) signal received by a feedback receive path.
Abstract translation: 一种装置包括串联耦合到椭圆LC滤波器的椭圆电感电容（LC）滤波器和电阻电容（RC）陷波滤波器。 椭圆LC滤波器和RC陷波滤波器被配置为对由反馈接收路径接收的射频（RF）信号进行滤波。
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