公开(公告)号：US20150303957A1

公开(公告)日：2015-10-22

申请号：US14754860

申请日：2015-06-30

Applicant: MEDIATEK Inc.

Inventor： Sheng-Hong Yan ,  Sheng-Hao Chen ,  Paul Cheng Po Liang ,  Jen-Che Tsai

IPC: H04B1/10 ,  H04B1/12

CPC classification number: H04B1/1081 ,  H04B1/10 ,  H04B1/123 ,  H04B17/11

Abstract: A radio frequency (RF) receiver includes a digital tuning engine; and I-path and Q-path analog filters, tuned by the digital tuning engine. The digital tuning engine gets an I/Q imbalance difference, and the digital tuning engines tunes the I-path analog filter and/or the Q-path analog filter based on the I/Q imbalance difference.

Abstract translation: 射频（RF）接收机包括数字调谐引擎; 以及由数字调谐引擎调谐的I-path和Q-path模拟滤波器。 数字调谐引擎获得I / Q不平衡差异，数字调谐引擎根据I / Q不平衡差调谐I路模拟滤波器和/或Q路径模拟滤波器。

公开(公告)号：US09100078B2

公开(公告)日：2015-08-04

申请号：US13798241

申请日：2013-03-13

Applicant: MEDIATEK Inc.

Inventor： Sheng-Hong Yan ,  Sheng-Hao Chen ,  Paul Cheng Po Liang ,  Jen-Che Tsai

IPC: H04B1/10 ,  H04B17/11

CPC classification number: H04B1/1081 ,  H04B1/10 ,  H04B1/123 ,  H04B17/11

Abstract: A radio frequency (RF) receiver includes a digital tuning engine; I-path and Q-path analog filters, tuned by the digital tuning engine; and a digital compensation circuit. The digital tuning engine executes a RC (resistor-capacitor) time constant calibration to adjust respective cut-off frequencies of the I-path analog filter and the Q-path analog filter. The digital tuning engine executes a filter mismatch calibration to match the I-path analog filter and the Q-path analog filter. The digital tuning engine executes a filter residual mismatch calibration to match an I-path response from the I-path analog filter to the digital compensation circuit and a Q-path response from the Q-path analog filter to the digital compensation circuit.

Abstract translation: 射频（RF）接收机包括数字调谐引擎; I路径和Q路径模拟滤波器，由数字调谐引擎调谐; 和数字补偿电路。 数字调谐引擎执行RC（电阻 - 电容）时间常数校准，以调整I路径模拟滤波器和Q路径模拟滤波器的相应截止频率。 数字调谐引擎执行滤波器失配校准，以匹配I路径模拟滤波器和Q路径模拟滤波器。 数字调谐引擎执行滤波器残余失配校准，以匹配从I路径模拟滤波器到数字补偿电路的I路径响应以及从Q路径模拟滤波器到数字补偿电路的Q路径响应。

公开(公告)号：US20140314184A1

公开(公告)日：2014-10-23

申请号：US14109968

申请日：2013-12-18

Applicant: MEDIATEK INC.

Inventor： Ho-Chi Huang ,  Chun-Hsien Peng ,  Paul Cheng Po Liang

IPC: H04L27/04

CPC classification number: H04L27/3854 ,  H04L27/2053

Abstract: A wireless transmitter has a digital baseband module and a radio-frequency (RF) transmitter. The digital baseband module generates a multi-mode modulated signal by using a plurality of digital synthesizers. The RF transmitter has a frequency synthesizer and a digital power amplifier (DPA). The frequency synthesizer generates an oscillation signal with an RF carrier frequency. The DPA generates a multi-standard RF signal according to the multi-mode modulated signal and the oscillation signal.

Abstract translation: 无线发射机具有数字基带模块和射频（RF）发射机。 数字基带模块通过使用多个数字合成器来产生多模调制信号。 RF发射机具有频率合成器和数字功率放大器（DPA）。 频率合成器产生具有RF载波频率的振荡信号。 DPA根据多模调制信号和振荡信号产生多标准RF信号。

公开(公告)号：US20140187182A1

公开(公告)日：2014-07-03

申请号：US13956376

申请日：2013-08-01

Applicant: MEDIATEK INC.

Inventor： Sheng-Hong Yan ,  Paul Cheng Po Liang

IPC: H03G3/00

CPC classification number: H03G3/004 ,  H03F1/0216 ,  H03F1/0222 ,  H03F1/3247 ,  H03F3/19 ,  H03F3/245 ,  H03F2200/102 ,  H03F2201/3233 ,  H03G3/3042

Abstract: A method of calibrating an envelope tracking system for a supply voltage for a power amplifier module within a radio frequency (RF) transmitter of a wireless communication unit is described. The method comprising, within at least one signal processing module of the wireless communication unit, applying a training signal comprising an envelope that varies with time to an input of the RF transmitter, receiving at least an indication of instantaneous output signal values for the power amplifier module in response to the training signal, calculating instantaneous gain values based at least partly on the received output power values, and adjusting a mapping function between an instantaneous envelope of a waveform signal to be amplified by the power amplifier module and the power amplifier module supply voltage to achieve a power amplifier module gain, for example that is monotonically increasing as a function of power amplifier output power.

Abstract translation: 描述了一种校准用于无线通信单元的射频（RF）发射机内的功率放大器模块的电源电压的包络跟踪系统的方法。 该方法包括在无线通信单元的至少一个信号处理模块内，将包括随时间变化的包络的训练信号施加到RF发射机的输入端，至少接收功率放大器的瞬时输出信号值的指示 模块，响应于训练信号，至少部分地基于所接收的输出功率值来计算瞬时增益值，并且调整要由功率放大器模块放大的波形信号的瞬时包络和功率放大器模块电源之间的映射函数 实现功率放大器模块增益的电压，例如，作为功率放大器输出功率的函数单调递增。