公开(公告)号：US20150333944A1

公开(公告)日：2015-11-19

申请号：US14712255

申请日：2015-05-14

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jung-Hwa BAE ,  In-Tae KANG ,  Hae-Dong YEON

IPC: H04L27/26 ,  H04B17/354 ,  H04L25/03 ,  H04L5/00

CPC classification number: H04B17/354 ,  H03D2200/0088 ,  H04B1/0475 ,  H04B2001/1045 ,  H04L5/0007 ,  H04L25/03 ,  H04L25/03006 ,  H04L25/03821 ,  H04L27/26 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/2636

Abstract: Disclosed are a method and apparatus for processing a transmission signal using a window function that changes a spectrum characteristic of a symbol. A transmission apparatus includes a symbol generator that generate a plurality of consecutive symbols, and a symbol windowing processor that is coupled with the symbol generator. The symbol windowing processor applies a first window function and a third window function that uses a difference between the first window and a second window, and changes a spectrum characteristic of each of the plurality of consecutive symbols, and processes neighboring symbols from among the plurality of consecutive symbols of which spectrum characteristics are changed, such that the symbols partially overlap one another.

Abstract translation: 公开了一种使用改变符号的频谱特性的窗口函数来处理传输信号的方法和装置。 发送装置包括生成多个连续符号的符号发生器，以及与符号发生器耦合的符号加窗处理器。 符号加窗处理器应用使用第一窗口和第二窗口之间的差异的第一窗口功能和第三窗口功能，并且改变多个连续符号中的每一个的频谱特性，并处理多个连续符号中的相邻符号 频谱特性的连续符号被改变，使得符号部分地彼此重叠。

公开(公告)号：US20180026369A1

公开(公告)日：2018-01-25

申请号：US15438099

申请日：2017-02-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dae-Young KIM ,  Dong-Hyun KANG ,  In-Tae KANG ,  Jong-Han LIM

IPC: H01Q5/335 ,  H04B17/12

CPC classification number: H01Q5/335 ,  H04B17/12 ,  H04W52/367

Abstract: Provided is a method for matching antenna impedance in a wireless communication system. The method includes determining an approximate reflection coefficient based on an input signal and an output signal of a bidirectional coupler connected to a signal path of an antenna; determining an antenna impedance matching parameter corresponding to the determined approximate reflection coefficient by using a lookup table; and performing antenna impedance matching based on the antenna impedance matching parameter.

公开(公告)号：US20130159369A1

公开(公告)日：2013-06-20

申请号：US13718599

申请日：2012-12-18

Applicant: Samsung Electronics Co., Ltd.

Inventor： In-Tae KANG ,  Su-Jin YOON ,  Sang-Min BAE ,  Jong-Han LIM

IPC: G06F17/14

CPC classification number: G06F17/141 ,  H04L27/263 ,  H04L27/265

Abstract: A Discrete Fourier Transform (DFT) apparatus is provided. The DFT apparatus includes a first delay, a second delay, an operator, and a multiplier. The first delay delays one sampling data by N-sample in a time axis when the one sampling data is input. The second delay delays an output value of a frequency component for a previous sampling data by 1-sample. The operator performs an operation based on the input one sampling data, the one sampling data delayed by the N-sample in the time axis, and the 1-sample delayed output value of the frequency component for the previous sampling data. The multiplier multiplies an output value from the operator by a twiddle factor  j  2   π   kn N . Therefore, a complexity of a stream DFT operation can be reduced.

Abstract translation: 提供了一种离散付里叶变换（DFT）装置。 DFT装置包括第一延迟，第二延迟，运算符和乘法器。 当输入一个采样数据时，第一延迟在时间轴上延迟一个采样数据N采样。 第二延迟将先前采样数据的频率分量的输出值延迟1个样本。 操作者基于输入的一个采样数据，在时间轴上延迟N个采样的一个采样数据和先前采样数据的频率分量的1采样延迟的输出值来执行操作。 乘法器将运算符的输出值乘以旋转因子。 因此，可以减少流DFT操作的复杂性。

公开(公告)号：US20130072139A1

公开(公告)日：2013-03-21

申请号：US13624358

申请日：2012-09-21

Applicant: SAMSUNG ELECTRONICS CO. LTD.

Inventor： In-Tae KANG ,  Sang-Min BAE ,  Jong-Han LIM

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H04B1/0028

Abstract: An apparatus and a method for processing reduced bandwidth Envelope Tracking (ET) and Digital Pre-Distortion (DPD) are provided. The apparatus includes a Crest Factor Reduction (CFR) unit, a resealing Digital Pre-Distortion (DPD) unit, an envelope converter, a Supply Modulator (SM), and a Power Amplifier (PA). The CFR unit suppresses an increase of a side lobe occurring when a Peak to Average Power Ratio (PAPR) decreases with respect to a signal generated in a baseband according to a standard and passes through a transmit (Tx) filter. The resealing DPD unit receives an original envelope amplitude and a reduced bandwidth envelope amplitude of an In-phase/Quadrature-phase (I/Q) signal output from the CFR unit to perform a pre-distortion process. The envelope converter converts an envelope signal to a reduced bandwidth envelope signal based on the I/Q signal output from the CFR unit.

Abstract translation: 一种用于处理减少带宽的设备和方法提供了信封跟踪（ET）和数字预失真（DPD）。 该装置包括波峰因数降低（CFR）单元，重新密封的数字预失真（DPD）单元，包络转换器，电源调制器（SM）和功率放大器（PA）。 当相对于在基带中产生的信号的峰值对平均功率比（PAPR）降低时，CFR单元抑制旁瓣增加，并且通过发送（Tx）滤波器。 重新密封的DPD单元接收从CFR单元输出的同相/正交相（I / Q）信号的原始包络幅度和减小的带宽包络幅度，以执行预失真处理。 基于从CFR单元输出的I / Q信号，包络转换器将包络信号转换为减小带宽包络信号。