公开(公告)号：US20150288398A1

公开(公告)日：2015-10-08

申请号：US14262978

申请日：2014-04-28

Applicant: Broadcom Corporation

Inventor： Hao Wu ,  Mohyee Salahelden Mikhemar ,  David Patrick Murphy ,  Hooman Darabi

IPC: H04B1/12 ,  H04L25/06 ,  H04L25/08

CPC classification number: H04B1/123

Abstract: A radio receiver supporting cancellation of thermal and phase noise in a down-converted RF signal. An inbound RF signal and blocking signal are provided directly to a passive mixer for down-conversion into a first baseband signal having data, thermal noise, and reciprocal mixing (RM) noise components. The inbound signals are also provided to a transconductance circuit, the output of which is provided to a second passive mixer for conversion into a current signal having data and blocking signal components, and a RM image. The blocking signal component and the RM image are mixed with a second LO signal, derived from the blocking signal, to produce a RM noise cancellation signal. The data component of the current signal is converted into a second baseband signal having data and thermal noise components. The first baseband signal, second baseband signal and RM noise cancellation signal are then combined through harmonic recombination.

Abstract translation: 支持降低转换的RF信号中的热和相位噪声的无线电接收器。 入站RF信号和阻塞信号被直接提供给无源混频器，用于下变频成具有数据，热噪声和互易混合（RM）噪声分量的第一基带信号。 入射信号还提供给跨导电路，其输出被提供给第二无源混频器，用于转换成具有数据和阻塞信号分量的电流信号以及RM图像。 阻塞信号分量和RM图像与从阻塞信号导出的第二LO信号混合，以产生RM噪声消除信号。 当前信号的数据分量被转换成具有数据和热噪声分量的第二基带信号。 然后通过谐波复合来组合第一基带信号，第二基带信号和RM噪声消除信号。

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：US09525447B1

公开(公告)日：2016-12-20

申请号：US14858826

申请日：2015-09-18

Applicant: Broadcom Corporation

Inventor： Hao Wu ,  Hooman Darabi

IPC: H03D7/16 ,  H04B1/26 ,  H03D7/14

CPC classification number: H03D7/1466 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H04B1/16

Abstract: Because of associated disadvantages of narrow-band off-chip radio-frequency (RF) filtering, a mixer-first receiver front-end designed to tolerate blockers with reduced gain compression and noise factor degradation is disclosed. The mixer-first receiver front-end includes two separate down-conversion paths that help to reduce added noise and voltage gain prior to baseband filtering, which are critical factors in eliminating narrow-band off-chip RF filtering. The mixer-first receiver front-end can be used to support down-conversion of multiple different communication signals (e.g., cellular, WLAN, and WPAN communication) with different center frequencies. In addition, where it is not possible to use a single, mixer-first receiver front-end to down-convert two different communication signals with potentially different center frequencies due to the need for both communication signals to be down-converted simultaneously, two mixer-first receiver front-ends can be efficiently used by sharing an antenna via a common RF port.

Abstract translation: 由于窄带片外射频（RF）滤波的相关缺点，公开了一种设计用于容忍具有减小的增益压缩和噪声因子降级的阻塞器的混频器优先接收机前端。 混频器第一接收机前端包括两个单独的下变频路径，有助于在基带滤波之前减少额外的噪声和电压增益，这是消除窄带片外RF滤波的关键因素。 混频器第一接收机前端可用于支持具有不同中心频率的多个不同通信信号（例如，蜂窝，WLAN和WPAN通信）的下转换。 另外，由于不需要两个通信信号同时进行下变频，所以在不可能使用单个混频器接收机前端来对具有潜在不同中心频率的两个不同通信信号进行下变频的情况下， 通过共用RF端口共享天线，可以有效地使用第一个接收机前端。

公开(公告)号：US09148186B1

公开(公告)日：2015-09-29

申请号：US14262978

申请日：2014-04-28

Applicant: Broadcom Corporation

Inventor： Hao Wu ,  Mohyee Salahelden Mikhemar ,  David Patrick Murphy ,  Hooman Darabi

IPC: H04L1/00 ,  H04B1/12 ,  H04L25/08 ,  H04L25/06

CPC classification number: H04B1/123

Abstract: A radio receiver supporting cancellation of thermal and phase noise in a down-converted RF signal. An inbound RF signal and blocking signal are provided directly to a passive mixer for down-conversion into a first baseband signal having data, thermal noise, and reciprocal mixing (RM) noise components. The inbound signals are also provided to a transconductance circuit, the output of which is provided to a second passive mixer for conversion into a current signal having data and blocking signal components, and a RM image. The blocking signal component and the RM image are mixed with a second LO signal, derived from the blocking signal, to produce a RM noise cancellation signal. The data component of the current signal is converted into a second baseband signal having data and thermal noise components. The first baseband signal, second baseband signal and RM noise cancellation signal are then combined through harmonic recombination.

Abstract translation: 支持降低转换的RF信号中的热和相位噪声的无线电接收器。 入站RF信号和阻塞信号被直接提供给无源混频器，用于下变频成具有数据，热噪声和互易混合（RM）噪声分量的第一基带信号。 入射信号还提供给跨导电路，其输出被提供给第二无源混频器，用于转换成具有数据和阻塞信号分量的电流信号以及RM图像。 阻塞信号分量和RM图像与从阻塞信号导出的第二LO信号混合，以产生RM噪声消除信号。 当前信号的数据分量被转换成具有数据和热噪声分量的第二基带信号。 然后通过谐波复合来组合第一基带信号，第二基带信号和RM噪声消除信号。

公开(公告)号：US20170099068A1

公开(公告)日：2017-04-06

申请号：US14882836

申请日：2015-10-14

Applicant: Broadcom Corporation

Inventor： David Murphy ,  Hao Wu ,  Hooman Darabi

IPC: H04B1/10

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.