公开(公告)号：US08781421B2

公开(公告)日：2014-07-15

申请号：US13630457

申请日：2012-09-28

Applicant: Silicon Laboratories Inc.

Inventor： Javier Elenes ,  Emmanuel Gautier ,  David Le Goff ,  Dana Taipale

IPC: H04B1/04

CPC classification number: H04B7/0845

Abstract: Systems and methods are disclosed for time-domain diversity combining of radio frequency (RF) broadcast signals. Two channelized quadrature (I/Q) signals are generated by different tuner circuitry coupled to two different antennas, are converted to frequency-domain signals, and are used to generate frequency-domain diversity weighting signals. The frequency-domain diversity weighting signals are then converted to time-domain weights and applied to the channelized I/Q signals. The weighted and channelized I/Q signals are then combined in the time-domain to provide a time-domain diversity combined signal. The resulting combined signal can be further processed, as desired, such as by using a demodulator to generate demodulated output signals. Disclosed methods and systems can be applied to a variety of receiver systems configured to receive RF broadcast signals.

Abstract translation: 公开了射频（RF）广播信号的时域分集组合的系统和方法。 双通道正交（I / Q）信号由耦合到两个不同天线的不同调谐器电路产生，被转换为频域信号，并用于产生频域分集加权信号。 然后将频域分集加权信号转换为时域权重并应用于信道化的I / Q信号。 然后将加权和信道化的I / Q信号在时域中组合以提供时域分集组合信号。 可以根据需要进一步处理所得到的组合信号，例如通过使用解调器来产生解调的输出信号。 公开的方法和系统可以应用于配置成接收RF广播信号的各种接收机系统。

公开(公告)号：US10523251B1

公开(公告)日：2019-12-31

申请号：US16156294

申请日：2018-10-10

Applicant: SILICON LABORATORIES INC.

Inventor： Abdulkerim L. Coban ,  Emmanuel Gautier ,  Fabrice Portier ,  Pascal Blouin ,  Wenhuan Yu

IPC: H04B1/10 ,  H04L25/08 ,  H04B17/336 ,  H03F3/19 ,  H03G3/30 ,  H04L25/03

Abstract: A communications receiver with improved blocker performance including multiple gain tables selected based on a number of reductions or back offs from a maximum coarse gain setting. A receiver chain with multiple gain stages converts a received signal to a digital format, determines the power level of the received signal, and provides an overload indication. A first gain table maximizes SNR and SNDR for weak blockers and at least one additional gain table successively improves SNDR for stronger blockers. An AGC circuit initially sets the coarse gain setting to maximum, and backs off a number of coarse gain steps until the receiver chain is not overloaded. The number of back off steps is used to select a gain table, the power level is used to select an entry in the selected table, and the selected entry includes gain settings for the gain stages of the receiver chain.

公开(公告)号：US11316482B2

公开(公告)日：2022-04-26

申请号：US16904811

申请日：2020-06-18

Applicant: Silicon Laboratories Inc.

Inventor： Luigi Panseri ,  Mustafa Koroglu ,  Emmanuel Gautier ,  Pascal Blouin

IPC: H03F1/32 ,  H03F3/24 ,  H04B1/04

Abstract: In an embodiment, an apparatus includes: a modulator to modulate a first signal; a distortion circuit coupled to the modulator to digitally pre-distort the first signal to compensate for a distortion of an amplifier; a distortion characterization circuit coupled to the distortion circuit to determine the distortion of the amplifier and configure the distortion circuit based on the determined distortion; a mixer coupled to the distortion circuit to upconvert the pre-distorted first signal to a pre-distorted radio frequency (RF) signal; and the amplifier coupled to the mixer to amplify the pre-distorted RF signal and output an amplified RF signal.

公开(公告)号：US20140094130A1

公开(公告)日：2014-04-03

申请号：US13630457

申请日：2012-09-28

Applicant: SILICON LABORATORIES, INC.

Inventor： Javier Elenes ,  Emmanuel Gautier ,  David Le Goff ,  Dana Taipale

IPC: H04B7/08

CPC classification number: H04B7/0845

Abstract: Systems and methods are disclosed for time-domain diversity combining of radio frequency (RF) broadcast signals. Two channelized quadrature (I/Q) signals are generated by different tuner circuitry coupled to two different antennas, are converted to frequency-domain signals, and are used to generate frequency-domain diversity weighting signals. The frequency-domain diversity weighting signals are then converted to time-domain weights and applied to the channelized I/Q signals. The weighted and channelized I/Q signals are then combined in the time-domain to provide a time-domain diversity combined signal. The resulting combined signal can be further processed, as desired, such as by using a demodulator to generate demodulated output signals. Disclosed methods and systems can be applied to a variety of receiver systems configured to receive RF broadcast signals.

Abstract translation: 公开了射频（RF）广播信号的时域分集组合的系统和方法。 双通道正交（I / Q）信号由耦合到两个不同天线的不同调谐器电路产生，被转换为频域信号，并用于产生频域分集加权信号。 然后将频域分集加权信号转换为时域权重并应用于信道化的I / Q信号。 然后将加权和信道化的I / Q信号在时域中组合以提供时域分集组合信号。 可以根据需要进一步处理所得到的组合信号，例如通过使用解调器来产生解调的输出信号。 公开的方法和系统可以应用于配置成接收RF广播信号的各种接收机系统。