公开(公告)号：US08868018B2

公开(公告)日：2014-10-21

申请号：US13769209

申请日：2013-02-15

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  David Murphy ,  Ahmad Mirzaei ,  Hooman Darabi

IPC: H04B1/10 ,  H04B10/69

CPC classification number: H04B1/10 ,  H04B1/1036 ,  H04B1/123 ,  H04B10/6973 ,  H04B2001/1063

Abstract: A system for cancellation of a reciprocal-mixing noise may comprise a down-converter mixer that may be configured to down convert a radio-frequency (RF) signal and to generate a baseband signal. The RF signal may include a desired signal and a blocker signal. A first signal path may be configured to receive the baseband signal and to generate a first signal. A second signal path may be configured to receive the baseband signal and to generate a second signal. A subtraction module may be configured to subtract the second signal from the first signal and to generate an output signal. The second signal may comprise the reciprocal-mixing noise, and the output signal may comprise the desired signal substantially free from the reciprocal-mixing noise.

Abstract translation: 用于消除互混混合噪声的系统可以包括可被配置为降低转换射频（RF）信号并产生基带信号的下变换器混频器。 RF信号可以包括期望的信号和阻塞信号。 第一信号路径可以被配置为接收基带信号并产生第一信号。 第二信号路径可以被配置为接收基带信号并产生第二信号。 减法模块可以被配置为从第一信号中减去第二信号并产生输出信号。 第二信号可以包括互易混合噪声，并且输出信号可以包括基本上没有互易混合噪声的期望信号。

公开(公告)号：US08712361B1

公开(公告)日：2014-04-29

申请号：US13683896

申请日：2012-11-21

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  David Murphy ,  Hooman Darabi

IPC: H04B1/10

CPC classification number: H04B1/12 ,  H04B1/109

Abstract: A method for reciprocal-mixing noise cancellation may include receiving, from a first mixer, a first signal comprising a wanted signal at a first frequency and a modulated signal at a second frequency. The modulated signal may be a product of a reciprocal-mixing of an unwanted signal with a phase noise. The second frequency may be greater than the first frequency, and at least a portion of the modulated signal may overlap the wanted signal, adding a reciprocal-mixing noise to the wanted signal. Using the first signal, a narrow second signal may be generated at a third frequency, twice the second frequency. At a second mixer, the second signal may be mixed with the first signal to generate a third signal. The third signal may be subtracted from the first signal to remove a reciprocal-mixing noise and to generate the wanted signal at the first frequency without the reciprocal-mixing noise.

Abstract translation: 用于相互混合噪声消除的方法可以包括从第一混频器接收包括第一频率的有用信号的第一信号和以第二频率调制的信号。 调制信号可以是不想要的信号与相位噪声的互相混合的乘积。 第二频率可以大于第一频率，并且调制信号的至少一部分可以与有用信号重叠，将有用信号的互易混合噪声相加。 使用第一信号，可以以第三频率产生窄的第二信号，是第二频率的两倍。 在第二混频器中，第二信号可以与第一信号混合以产生第三信号。 可以从第一信号中减去第三信号以去除倒数混合噪声，并在第一频率下产生有用信号而没有互易混合噪声。

公开(公告)号：US08670739B1

公开(公告)日：2014-03-11

申请号：US13736915

申请日：2013-01-08

Applicant: Broadcom Corporation

Inventor： David Murphy ,  Hooman Darabi

IPC: H04B1/10 ,  H04B17/00

CPC classification number: H04B1/1027 ,  H04B15/06 ,  H04B2001/1063

Abstract: A high quality factor frequency translated bandpass filter (FTBPF) with harmonic rejection includes multiple transconductance cells configured to convert a received radio frequency (RF) voltage signal into respective RF current signals. Each of the transconductance cells are weighted such that the FTBPF has an effective transconductance of a first magnitude for frequency components of the received RF voltage signal arising from a first harmonic and an effective transconductance of a second magnitude less than the first magnitude for frequency components of the received RF voltage signal arising from harmonics at integer multiples of the first harmonic. The FTBPF also includes multiple frequency conversion cells coupled to the transconductance cells and configured to mix respective ones of the RF current signals with multiple non-overlapping local oscillator signals. The FTBPF also includes multiple baseband impedances coupled to outputs of the frequency conversion cells and ground and are frequency translated by mixed signals from the frequency conversion cells.

Abstract translation: 具有谐波抑制的高质量因子频率转换带通滤波器（FTBPF）包括被配置为将接收的射频（RF）电压信号转换成相应的RF电流信号的多个跨导单元。 每个跨导单元被加权，使得FTBPF对于从第一谐波产生的接收的RF电压信号的频率分量和对于频率分量的第一幅度小于第一幅度的第二幅度的有效跨导，具有第一幅度的有效跨导 所接收的RF电压信号由一次谐波的整数倍的谐波产生。 FTBPF还包括耦合到跨导单元的多个频率转换单元，并且被配置为将各个RF电流信号与多个不重叠的本地振荡器信号混合。 FTBPF还包括耦合到频率转换单元和地的输出的多个基带阻抗，并且由来自频率转换单元的混合信号进行频率转换。

公开(公告)号：US09059796B2

公开(公告)日：2015-06-16

申请号：US13736895

申请日：2013-01-08

Applicant: Broadcom Corporation

Inventor： David Murphy ,  Hooman Darabi

IPC: H04B1/10 ,  H04B15/06

CPC classification number: H04B1/1081 ,  H03D7/18 ,  H04B1/10 ,  H04B15/06

Abstract: A radio frequency (RF) noise-cancelling receiver includes first transconductance cells configured to produce respective weighted current signals proportional to an input voltage signal. The RF receiver includes frequency conversion cells coupled to the first transconductance cells and configured to mix the weighted current signals with a plurality of non-overlapping local oscillator (LO) signals to produce downconverted current signals. The RF receiver includes transimpedance amplifiers coupled to the frequency conversion cells and configured to produce output voltage signals proportional to the downconverted current signals. The transimpedance amplifiers include second transconductance cells. Each of the first and second transconductance cells has an effective transconductance of a first magnitude for frequency components of the input voltage signal arising from a first harmonic and an effective transconductance of a second magnitude less than the first magnitude for frequency components of the input voltage signal arising from harmonics at integer multiples of the first harmonic.

Abstract translation: 射频（RF）噪声消除接收机包括被配置为产生与输入电压信号成比例的各个加权电流信号的第一跨导单元。 RF接收机包括耦合到第一跨导单元的频率转换单元，并且被配置为将加权的电流信号与多个非重叠的本地振荡器（LO）信号混合以产生下变频的电流信号。 RF接收机包括耦合到频率转换单元并被配置为产生与下变频电流信号成比例的输出电压信号的跨阻放大器。 跨阻放大器包括第二跨导电池。 第一和第二跨导单元中的每一个具有针对由第一谐波产生的输入电压信号的频率分量的第一幅度的有效跨导和小于输入电压信号的频率分量的第一幅度的第二幅度的有效跨导 由一次谐波的整数倍的谐波产生。

公开(公告)号：US08862087B2

公开(公告)日：2014-10-14

申请号：US13897306

申请日：2013-05-17

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  David Murphy ,  Hooman Darabi

IPC: H04B1/10

CPC classification number: H04B15/06 ,  H04B1/109

Abstract: A method for reciprocal-mixing noise cancellation may include receiving, from a first mixer, a first signal comprising a wanted signal at a first frequency and a modulated signal at a second frequency. The modulated signal may be a product of a reciprocal-mixing of an unwanted signal with a phase noise. One or more portions of the modulated signal may overlap the wanted signal, adding a reciprocal-mixing noise to the wanted signal. A second signal may be generated by mixing, at a second mixer, the first signal with a third signal, which is at a third frequency related to a blocker offset frequency. A gain may be applied to the second signal to generate an amplified second signal that may be subtracted from the first signal to generate a fourth signal. The fourth signal may be filtered to generate the wanted signal at the first frequency without the reciprocal-mixing noise.

Abstract translation: 用于相互混合噪声消除的方法可以包括从第一混频器接收包括第一频率的有用信号的第一信号和以第二频率调制的信号。 调制信号可以是不想要的信号与相位噪声的互相混合的乘积。 调制信号的一个或多个部分可能与有用信号重叠，向有用信号添加互易混合噪声。 第二信号可以通过在第二混合器处将第一信号与第三信号混合来产生，第三信号是与阻塞偏移频率相关的第三频率。 可以将增益应用于第二信号以产生可以从第一信号中减去的放大的第二信号，以产生第四信号。 可以对第四信号进行滤波，以在第一频率下产生有用信号，而不会产生相互混合噪声。

公开(公告)号：US08824988B2

公开(公告)日：2014-09-02

申请号：US13681333

申请日：2012-11-19

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  David Murphy ,  Hooman Darabi

IPC: H04B17/00 ,  H04B1/10

CPC classification number: H04B1/1027

Abstract: A method for reciprocal-mixing noise cancellation may include receiving a baseband signal down-converted to baseband using a local oscillator (LO). The baseband signal may comprise a wanted signal and a reciprocal mixing noise, which at least partially overlaps the wanted signal and is due to mixing of a blocker signal with a phase noise of the LO. Blocker recovery may be performed on the baseband signal and a blocker estimate signal may be generated from the baseband signal. The phase noise of the LO may be measured and used in generating a phase noise measurement signal. The blocker estimate signal and the phase noise measurement signal may be processed to generate a reconstructed noise signal that may comprise the overlapping reciprocal mixing noise. The reconstructed noise signal may be subtracted from the baseband signal to provide the wanted signal free from to the reciprocal mixing noise.

Abstract translation: 用于相互混合噪声消除的方法可以包括使用本地振荡器（LO）接收被下变频到基带的基带信号。 基带信号可以包括有用信号和互易混合噪声，其与有用信号至少部分重叠，并且是由于阻塞信号与LO的相位噪声的混合引起的。 可以对基带信号执行阻塞恢复，并且可以从基带信号生成阻塞估计信号。 可以测量LO的相位噪声并用于产生相位噪声测量信号。 阻塞估计信号和相位噪声测量信号可以被处理以产生重构的噪声信号，其可以包括重叠的互倒混合噪声。 可以从基带信号中减去重建的噪声信号，以提供不需要的混合噪声的有用信号。

公开(公告)号：US20140235191A1

公开(公告)日：2014-08-21

申请号：US13897306

申请日：2013-05-17

Applicant: Broadcom Corporation

Inventor： Mohyee MIKHEMAR ,  David Murphy ,  Hooman Darabi

IPC: H04B1/10

CPC classification number: H04B15/06 ,  H04B1/109

Abstract: A method for reciprocal-mixing noise cancellation may include receiving, from a first mixer, a first signal comprising a wanted signal at a first frequency and a modulated signal at a second frequency. The modulated signal may be a product of a reciprocal-mixing of an unwanted signal with a phase noise. One or more portions of the modulated signal may overlap the wanted signal, adding a reciprocal-mixing noise to the wanted signal. A second signal may be generated by mixing, at a second mixer, the first signal with a third signal, which is at a third frequency related to a blocker offset frequency. A gain may be applied to the second signal to generate an amplified second signal that may be subtracted from the first signal to generate a fourth signal. The fourth signal may be filtered to generate the wanted signal at the first frequency without the reciprocal-mixing noise.

Abstract translation: 用于相互混合噪声消除的方法可以包括从第一混频器接收包括第一频率的有用信号的第一信号和以第二频率调制的信号。 调制信号可以是不想要的信号与相位噪声的互相混合的乘积。 调制信号的一个或多个部分可能与有用信号重叠，向有用信号添加互易混合噪声。 第二信号可以通过在第二混合器处将第一信号与第三信号混合来产生，第三信号是与阻塞偏移频率相关的第三频率。 可以将增益应用于第二信号以产生可以从第一信号中减去的放大的第二信号，以产生第四信号。 可以对第四信号进行滤波，以在第一频率下产生有用信号，而不会产生相互混合噪声。

公开(公告)号：US20140141741A1

公开(公告)日：2014-05-22

申请号：US13683896

申请日：2012-11-21

Applicant: BROADCOM CORPORATION

Inventor： Mohyee MIKHEMAR ,  David Murphy ,  Hooman Darabi

IPC: H04B1/12

CPC classification number: H04B1/12 ,  H04B1/109

Abstract: A method for reciprocal-mixing noise cancellation may include receiving, from a first mixer, a first signal comprising a wanted signal at a first frequency and a modulated signal at a second frequency. The modulated signal may be a product of a reciprocal-mixing of an unwanted signal with a phase noise. The second frequency may be greater than the first frequency, and at least a portion of the modulated signal may overlap the wanted signal, adding a reciprocal-mixing noise to the wanted signal. Using the first signal, a narrow second signal may be generated at a third frequency, twice the second frequency. At a second mixer, the second signal may be mixed with the first signal to generate a third signal. The third signal may be subtracted from the first signal to remove a reciprocal-mixing noise and to generate the wanted signal at the first frequency without the reciprocal-mixing noise.

Abstract translation: 用于相互混合噪声消除的方法可以包括从第一混频器接收包括第一频率的有用信号的第一信号和以第二频率调制的信号。 调制信号可以是不想要的信号与相位噪声的互相混合的乘积。 第二频率可以大于第一频率，并且调制信号的至少一部分可能与有用信号重叠，将有用信号的互易混合噪声相加。 使用第一信号，可以以第三频率产生窄的第二信号，是第二频率的两倍。 在第二混频器中，第二信号可以与第一信号混合以产生第三信号。 可以从第一信号中减去第三信号以去除倒数混合噪声，并在第一频率下产生有用信号而没有互易混合噪声。

公开(公告)号：US09595985B1

公开(公告)日：2017-03-14

申请号：US14882836

申请日：2015-10-14

Applicant: Broadcom Corporation

Inventor： David Murphy ,  Hao Wu ,  Hooman Darabi

IPC: H04B1/10 ,  H04B15/00 ,  H04B1/12

CPC classification number: H04B1/10 ,  H04B1/12 ,  H04B1/18 ,  H04B15/00

Abstract: Recently proposed noise-cancelling receivers report a best case trade-off between noise figure and linearity for a matched wideband receiver. These receivers are further improved using a passive front-end gain. The front-end gain reduces the power requirements of the radio frequency transconductance stage, and potentially other stages where, e.g., smaller mixer switches may be employed.

Abstract translation: 最近提出的噪声消除接收机报告了匹配宽带接收机的噪声系数和线性度之间的最佳情况权衡。 使用被动前端增益进一步改善这些接收机。 前端增益降低了射频跨导级的功率需求，以及潜在的其他阶段，其中可以采用例如较小的混频器开关。

公开(公告)号：US20140057584A1

公开(公告)日：2014-02-27

申请号：US13863057

申请日：2013-04-15

Applicant: Broadcom Corporation

Inventor： David Murphy ,  Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC: H04B1/16

CPC classification number: H04B1/16 ,  H04B1/30

Abstract: Aspects of a method and system for a low-noise, highly-linear receiver front-end are provided. In this regard, a received signal may be processed via one or more transconductances, one or more transimpedance amplifiers (TIAs), and one or more mixers to generate a first baseband signal corresponding to a voltage at a node of the receiver, and a second baseband signal corresponding to a current at the node of the receiver. The first signal and the second signal may be processed to recover information from the received signal. The first signal may be generated via a first one or more signal paths of the receiver and the second signal may be generated via a second one or more signal paths of the receiver.

Abstract translation: 提供了一种用于低噪声，高线性接收机前端的方法和系统。 在这方面，可以经由一个或多个跨导，一个或多个跨阻抗放大器（TIAs）和一个或多个混频器来处理接收的信号，以产生对应于接收机的节点处的电压的第一基带信号，以及第二 对应于接收机节点处的电流的基带信号。 可以处理第一信号和第二信号以从接收的信号中恢复信息。 可以经由接收机的第一个或多个信号路径生成第一信号，并且可以经由接收机的第二个一个或多个信号路径来生成第二信号。