公开(公告)号：US09042466B1

公开(公告)日：2015-05-26

申请号：US14159541

申请日：2014-01-21

Applicant: Marvell International LTD.

Inventor： Hui-Ling Lou ,  Kok-Wui Cheong ,  Randy Tsang

IPC: H04L27/00 ,  H04B1/38

CPC classification number: H04B1/38 ,  H04B7/0413 ,  H04B7/0891 ,  H04L1/0002 ,  H04L1/0625 ,  H04L5/0003 ,  H04L5/003 ,  H04L25/03343 ,  H04L2025/03426

Abstract: A wireless communication device including a transceiver, a medium access control device, a first module and a second module. The transceiver is configured to receive a signal on a channel. The medium access control device is configured to determine a parameter, wherein the parameter is a rank of a matrix of the channel, an angle of array of the signal, a packet error rate of the signal, a frame error rate of the signal, or a signal-to-noise ratio of the signal. The first module is configured to, based on the parameter, determine whether an operating environment of the wireless communication device is a rich-scattering environment or a line of sight environment. The second module is configured to adjust a bandwidth of the wireless communication device based on the operating environment as determined by the first module.

Abstract translation: 一种无线通信设备，包括收发器，介质访问控制设备，第一模块和第二模块。 收发器被配置为在信道上接收信号。 介质访问控制设备被配置为确定参数，其中参数是信道的矩阵的秩，信号的阵列角度，信号的分组错误率，信号的帧错误率，或者 信号的信噪比。 第一模块被配置为基于该参数来确定无线通信设备的操作环境是富散射环境还是视线环境。 第二模块被配置为基于由第一模块确定的操作环境来调整无线通信设备的带宽。

公开(公告)号：US08598948B1

公开(公告)日：2013-12-03

申请号：US13685336

申请日：2012-11-26

Applicant: Marvell International Ltd.

Inventor： Chun-Geik Tan ,  Randy Tsang ,  Yonghua Song

IPC: G05F1/10

CPC classification number: G05F3/24 ,  H03L1/022 ,  H03L7/099

Abstract: A system and method for voltage controlled oscillator (VCO) biasing in low voltage circuits including low resistance elements that are especially susceptible to noise. In one embodiment, a poly resistor and triode resistor is used to cancel or offset the effects that temperature variations have on the circuit. The triode resistor is powered by a voltage source that uses a pair of diodes coupled to a constant transconductance (gm) circuit to generate a reduced noise voltage that is independent of the power supply noise. The size of the triode resistor and poly resistors can be varied.

Abstract translation: 一种低压电路中压控振荡器（VCO）偏置的系统和方法，包括特别容易受噪声影响的低电阻元件。 在一个实施例中，使用多电阻和三极管电阻来消除或抵消温度变化对电路的影响。 三极管电阻由电压源供电，该电压源使用耦合到恒定跨导（gm）电路的一对二极管来产生独立于电源噪声的降低的噪声电压。 三极管电阻和多个电阻的大小可以变化。

公开(公告)号：US09484871B1

公开(公告)日：2016-11-01

申请号：US14710092

申请日：2015-05-12

Applicant: Marvell International Ltd.

Inventor： Shan He ,  Randy Tsang

IPC: H03K5/00 ,  H03F3/45 ,  H03H11/04

CPC classification number: H03F3/45475 ,  H03F2203/45084 ,  H03F2203/45526 ,  H03H11/126 ,  H03H2011/0494

Abstract: In some implementations, a filter circuit includes a first signal path that includes a first amplifier and a second signal path that includes a second amplifier. The first signal path is configured to receive a first component of a complex signal and provide a filtered version of the first component of the complex signal. The second signal path is configured to receive a second component of the complex signal and provide a filtered version of the second component of the complex signal. The first signal path before the first amplifier is coupled to the second signal path before the second amplifier. The first signal path after the first amplifier is coupled to the second signal path before the second amplifier. The second signal path after the second amplifier is coupled to the first signal path before the first amplifier.

Abstract translation: 在一些实现中，滤波器电路包括第一信号路径，其包括第一放大器和包括第二放大器的第二信号路径。 第一信号路径被配置为接收复信号的第一分量并且提供复信号的第一分量的滤波版本。 第二信号路径被配置为接收复信号的第二分量并且提供复信号的第二分量的滤波版本。 第一放大器之前的第一信号路径在第二放大器之前耦合到第二信号路径。 第一放大器之后的第一信号路径在第二放大器之前耦合到第二信号路径。 第二放大器之后的第二信号路径在第一放大器之前耦合到第一信号路径。

公开(公告)号：US08787423B1

公开(公告)日：2014-07-22

申请号：US13920768

申请日：2013-06-18

Applicant: Marvell International Ltd.

Inventor： Randy Tsang ,  Chun Geik Tan ,  Yui Lin ,  Meng Long

IPC: H04B1/00

CPC classification number: H04B1/7136 ,  H04B2001/71365

Abstract: A system and method for frequency hopping precalibrates a subset of a plurality of channels, storing the channels' associated curves in a computer readable medium. Before hopping to a new channel, decision making circuitry can access the precalibrated curves. If the destination channel has an associated curve, then the system can use the values from that curve when hopping to a new channel. If the destination channel does not have an associated precalibrated curve, then the system can identify a closely situated channel with a precalibrated curve and use an offset value to settle at the destination channel. According to another aspect of the present invention, the offsets can be updated. According to a further aspect of the invention, the updated can be done dynamically.

Abstract translation: 用于跳频的系统和方法预先校准多个信道的子集，将信道的相关曲线存储在计算机可读介质中。 在跳到新频道之前，决策电路可以访问预校准的曲线。 如果目标通道具有相关联的曲线，则当跳到新通道时，系统可以使用该曲线中的值。 如果目的地信道没有相关联的预校准曲线，则系统可以使用预校准曲线识别具有相似位置的信道，并使用偏移值来定位在目的地信道。 根据本发明的另一方面，可以更新偏移。 根据本发明的另一方面，可以动态地进行更新。

公开(公告)号：US10581478B1

公开(公告)日：2020-03-03

申请号：US16274529

申请日：2019-02-13

Applicant: Marvell International Ltd.

Inventor： Sai-Wang Tam ,  Randy Tsang ,  Ovidiu Carnu ,  Donghong Cui ,  Amir Ghaffari ,  Wai Lau ,  Timothy Loo ,  Alden C. Wong

IPC: H03F3/191 ,  H04B1/18 ,  H04B1/04

Abstract: Radio-frequency front-end circuitry includes an output terminal, a receive amplifier controllably coupled to the output terminal, at least one transmit amplifier controllably inductively coupled to the output terminal, and at least one impedance element controllably coupled between ground and one of the at least one transmit amplifier to reduce degradation of output of the radio-frequency front-end circuitry when the at least one transmit amplifier is not in use. In differential signaling, there is an impedance element between ground and each pole of the differential signal. A second transmit amplifier may generate second transmit signals and harmonics of the second transmit signals, and the second transmit amplifier may be switchably connected to the output of a first transmit amplifier so that output of the second transmit amplifier is filtered by the one of the first transmit amplifier. The transmit amplifiers may include a WiFi power amplifier and a BLUETOOTH® power amplifier.