公开(公告)号：US20150036765A1

公开(公告)日：2015-02-05

申请号：US14450480

申请日：2014-08-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sung-ryul YUN ,  Young-ho OH

IPC: H04L27/26 ,  H04L25/02 ,  H04L5/00

CPC classification number: H04L27/262 ,  H04B2201/70706 ,  H04L5/0048 ,  H04L25/0224 ,  H04L27/2602 ,  H04L27/2618 ,  H04L27/263 ,  H04L27/32

Abstract: A transmitter includes: a frame generator configured to generate a frame including a frame starting symbol, at least one data symbol and a frame closing symbol; a pilot and reserved tone inserter configured to insert pilots and reserved tones in at least one of the frame starting symbol, the data symbol and the frame closing symbol such that positions of the reserved tones do not overlap positions of the pilots in the at least one of the frame starting symbol, the data symbol and the frame closing symbol; and a transmitter configured to transmit the frame in which the pilots and the reserved tones are inserted, wherein the reserved tones are not used to transmit data in the frame.

Abstract translation: 发射机包括：帧生成器，被配置为生成包括帧开始符号的帧，至少一个数据符号和帧闭合符号; 导频和保留音调插入器，被配置为在所述帧开始符号，所述数据符号和所述帧闭合符号中的至少一个中插入导频和保留音调，使得所保留的音调的位置不与所述至少一个中的所述导频的位置重叠 的帧起始符号，数据符号和帧闭合符号; 以及发射机，被配置为发送其中插入有导频和保留音调的帧，其中所保留的音调不用于在帧中发送数据。

公开(公告)号：US20140348266A1

公开(公告)日：2014-11-27

申请号：US14365868

申请日：2012-11-02

Applicant: NEC Corporation

Inventor： Shingo Yamanouchi

IPC: H04B1/04 ,  H04L25/02 ,  H04L27/26

CPC classification number: H04B1/0475 ,  H04B2001/0416 ,  H04B2201/70706 ,  H04L25/02 ,  H04L27/2614 ,  H04L27/2621 ,  H04L27/3411

Abstract: RF input signals having mutually different carrier frequencies are input from a signal generator to a power amplifier, the power amplifier amplifying the RF input signals and outputting them as RF output signals. The signal generator has a function for reducing the PAR of the waveform combining the RF input signals. The PAR reduction of the combined waveform of the RF input signals is performed through a control on the transmission timing of the RF input signals via a delay adjuster installed in the signal generator, or through an amplitude constraint on the RF input signals via a limiter installed in the signal generator. In this manner, a transmission device with improved power efficiency is provided.

Abstract translation: 具有相互不同的载波频率的RF输入信号从信号发生器输入到功率放大器，功率放大器放大RF输入信号并将其作为RF输出信号输出。 信号发生器具有减少组合RF输入信号的波形的PAR的功能。 通过经由安装在信号发生器中的延迟调节器对RF输入信号的发送定时进行控制，或通过安装了限幅器的RF输入信号的幅度约束来执行RF输入信号的组合波形的PAR减小 在信号发生器中。 以这种方式，提供了具有提高的功率效率的传输装置。

公开(公告)号：US08521204B2

公开(公告)日：2013-08-27

申请号：US10954583

申请日：2004-09-30

Applicant: Armin W. Klomsdorf ,  Robert T. Love ,  Ernest Schirmann ,  Dale G. Schwent

Inventor： Armin W. Klomsdorf ,  Robert T. Love ,  Ernest Schirmann ,  Dale G. Schwent

IPC: H04B7/185 ,  H04B7/00

CPC classification number: H04W52/367 ,  H03F1/0211 ,  H03F1/0244 ,  H03F1/0261 ,  H04B2001/0416 ,  H04B2201/70706 ,  H04B2201/70707

Abstract: A method in a wireless communication transmitter including a baseband processor (310) that configures the transmitter for a particular signal configuration, and a headroom controller (350) for adjusting transmitter headroom based on the particular signal configuration. In one embodiment, the headroom is controlled based on a power metric, for example, a 3rd order polynomial or a peak to average ratio (PAR) metric, that is a function of the signal configuration. In another embodiment, the headroom is adjusted using information in a look up table.

Abstract translation: 一种无线通信发射机中的一种方法，包括配置用于特定信号配置的发射机的基带处理器（310）和用于基于特定信号配置来调整发射机余量的裕量控制器（350）。 在一个实施例中，基于诸如信号配置的函数的功率度量，例如三阶多项式或峰值平均比（PAR）度量来控制净空。 在另一个实施例中，使用查询表中的信息来调整净空。

公开(公告)号：US08345618B2

公开(公告)日：2013-01-01

申请号：US12865102

申请日：2009-08-12

Applicant: Byoung-Hoon Kim ,  Jung Hoon Lee ,  Jae Hoon Chung ,  Young Seob Choi ,  Seung Hee Han ,  Hyunsoo Ko

Inventor： Byoung-Hoon Kim ,  Jung Hoon Lee ,  Jae Hoon Chung ,  Young Seob Choi ,  Seung Hee Han ,  Hyunsoo Ko

IPC: H04W4/00

CPC classification number: H04L5/0023 ,  H04B2201/70706 ,  H04J11/0023

Abstract: A transmitter includes a plurality of transmit antennas, a processor configured to process user data, and a single carrier frequency division multiple access (SC-FDMA) signal generator configured to receive the user data and generate SC-FDMA symbols transmitted through the plurality of transmit antennas. The SC-FDMA signal generator independently performs inverse fast Fourier transform (IFFT) for each transmit antenna, and each of the plurality of transmit antennas is associated with each of a plurality of carriers.

Abstract translation: 发射机包括多个发射天线，被配置为处理用户数据的处理器和被配置为接收用户数据并生成通过多个发射发射的SC-FDMA符号的单载波频分多址（SC-FDMA）信号发生器 天线。 SC-FDMA信号发生器对于每个发射天线独立地执行快速傅立叶逆变换（IFFT），并且多个发射天线中的每一个与多个载波中的每一个相关联。

公开(公告)号：US20120321014A1

公开(公告)日：2012-12-20

申请号：US13581221

申请日：2010-11-19

Applicant: Takashi Maehata ,  Mikhail Illarionov

Inventor： Takashi Maehata ,  Mikhail Illarionov

IPC: H04B1/04

CPC classification number: H04J11/0023 ,  H04B1/707 ,  H04B2201/70706 ,  H04L27/2624

Abstract: An object of the present invention is to appropriately limit an amplitude of an IQ baseband signal having different average powers for respective frequency bands B1 and B2, without degrading an SNR. The present invention relates to a signal processing circuit 9 for reducing a PAPR of a modulated wave signal to be inputted to a power amplification circuit 5. The signal processing circuit 9 includes a power calculation section 13 that calculates an instantaneous power P of an IQ baseband signal of the modulated wave signal, and a signal processing section 17 that limits an amplitude of the IQ baseband signal by performing a clipping process or the like, by using cancellation signals Ic and Qc capable of canceling the IQ baseband signal in accordance with average powers of the respective frequency bands B1 and B2, such that an upper limit of an instantaneous power P becomes equivalent to a predetermined threshold Pth.

Abstract translation: 本发明的目的是适当地限制具有针对各个频带B1和B2的平均功率不同的IQ基带信号的幅度，而不降低SNR。 本发明涉及一种用于减少要输入到功率放大电路5的调制波信号的PAPR的信号处理电路9.信号处理电路9包括功率计算部13，其计算IQ基带的瞬时功率P 信号处理部分17，通过使用能够根据平均功率消除IQ基带信号的消除信号Ic和Qc，通过执行削波处理等来限制IQ基带信号的幅度 使得瞬时功率P的上限等于预定阈值Pth。

公开(公告)号：US08311078B2

公开(公告)日：2012-11-13

申请号：US13117401

申请日：2011-05-27

Applicant: Atsuhiro Hirama

Inventor： Atsuhiro Hirama

IPC: H04B1/00

CPC classification number: H04B1/707 ,  H04B2201/70706 ,  H04J13/00 ,  H04L27/2621

Abstract: A signal generating apparatus includes a spreading device that respectively spreads data using spreading code that is based on an initial phase; a multiplexing unit that code multiplexes the data spread by the spreading device; a calculating unit that calculates a peak of a signal resulting from code multiplexing by the multiplexing unit; a changing unit that changes the initial phase of the spreading device in a predetermined order; a determining unit that each time the initial phase is changed by the changing unit, determines whether the peak calculated by the calculating unit is at most a threshold; and a transmission control unit that outputs the signal, if the determining unit determines that the peak is less than or equal to the threshold.

Abstract translation: 信号发生装置包括扩展装置，其使用基于初始相位的扩展码分别扩展数据; 复用单元，对通过扩展装置传播的数据进行多路复用; 计算单元，其计算由所述复用单元的代码复用产生的信号的峰值; 改变单元，其以预定顺序改变扩展设备的初始相位; 确定单元，每当由所述改变单元改变所述初始相位时，确定由所述计算单元计算出的峰值是否至多为阈值; 以及发送控制单元，如果所述确定单元确定所述峰值小于或等于所述阈值，则输出所述信号。

公开(公告)号：US08150338B2

公开(公告)日：2012-04-03

申请号：US13180828

申请日：2011-07-12

Applicant: Lars Sundström

Inventor： Lars Sundström

IPC: H01Q11/12

CPC classification number: H04L27/2624 ,  H04B2201/70706

Abstract: A method and apparatus taught herein reduce the peak-to-average ratio (PAR) of a complex-valued signal based on detecting peaks in the signal that are above a peak threshold, characterizing the detected peaks in Cartesian coordinates, generating cancellation pulses in Cartesian coordinates based on the detected peak characterizations. PAR reduction processing continues with canceling the detected peaks by combining the cancellation pulses with a correspondingly delayed version of the signal. Advantageously, peak detection may be performed in polar form using a computationally efficient peak detection algorithm that avoids calculation of the I and Q peak waveforms unless a signal peak beyond a defined threshold is present. In one or more embodiments, the generation and use of asymmetric and/or shaped cancellation pulses offers further performance advantages.

Abstract translation: 本文教导的方法和装置基于检测到高于峰值阈值的信号中的峰值来表示复数值信号的峰值平均比（PAR），表征笛卡尔坐标中检测到的峰值，产生笛卡尔坐标中的取消脉冲 基于检测到的峰值表征的坐标。 通过将消除脉冲与信号的相应延迟版本组合，PAR减小处理继续消除检测到的峰值。 有利地，峰值检测可以使用计算上有效的峰值检测算法以极性形式进行，其避免计算I和Q峰值波形，除非存在超出限定阈值的信号峰值。 在一个或多个实施例中，不对称和/或成形的取消脉冲的产生和使用提供了进一步的性能优点。

公开(公告)号：US08149964B2

公开(公告)日：2012-04-03

申请号：US11768164

申请日：2007-06-25

Applicant: Jonathan Sidi ,  Ketan N. Patel

Inventor： Jonathan Sidi ,  Ketan N. Patel

IPC: H04L27/08

CPC classification number: H04L25/067 ,  H03G1/04 ,  H03G3/3089 ,  H04B1/7115 ,  H04B2201/70706 ,  H04L27/3809

Abstract: Techniques for scaling symbols to account for large abrupt changes in received power at a user equipment (UE) are described. The UE performs AGC on received samples to obtain input samples. The UE processes (e.g., CDMA demodulates) the input samples to obtain first symbols. The UE determines the power of the input samples and derives a symbol gain based on (e.g., inversely related to) the power of the input samples. The UE scales the first symbols with the symbol gain to obtain detected data symbols having approximately constant amplitude, even with large abrupt changes in the power of the input samples. The UE estimates signal amplitude and noise variance based on the detected data symbols, computes LLRs for code bits of the detected data symbols based on the signal amplitude and noise variance, and decodes the LLRs to obtain decoded data.

Abstract translation: 描述用于缩放符号以解决用户设备（UE）的接收功率的大的突然变化的技术。 UE对接收到的样本执行AGC以获得输入样本。 UE处理（例如，CDMA解调）输入样本以获得第一符号。 UE基于（例如，与输入样本的功率相反）来确定输入样本的功率并导出符号增益。 UE随着符号增益缩放第一个符号以获得具有近似恒定幅度的检测数据符号，即使输入样本的功率有大的突然变化。 UE基于检测到的数据符号估计信号幅度和噪声方差，基于信号幅度和噪声方差计算检测数据符号的码位的LLR，并解码LLR以获得解码数据。

公开(公告)号：US08098751B2

公开(公告)日：2012-01-17

申请号：US12177619

申请日：2008-07-22

Applicant: Steve Shattil

Inventor： Steve Shattil

IPC: H04K1/10

CPC classification number: H04L27/0004 ,  H04B2201/70706 ,  H04L1/04 ,  H04L5/0023 ,  H04L5/023 ,  H04L25/0216 ,  H04L27/2601 ,  H04L27/2614

Abstract: Techniques for reducing peak-to-average power in multicarrier transmitters employ peak cancellation with subcarriers that are impaired by existing channel conditions. The use of Carrier Interferometry (CI) coding further improves the effectiveness of peak reduction. CI coding can also be impressed onto pulse sequences in the time domain, which enhances spectral selection and facilitates peak-power control.

Abstract translation: 降低多载波发射机的峰均功率的技术采用由现有信道条件削弱的副载波的峰值消除。 使用载波干涉测量（CI）编码进一步提高了峰值降低的有效性。 CI编码也可以在时域中的脉冲序列上印象，这增强了光谱选择并促进了峰值功率控制。

公开(公告)号：US08014436B2

公开(公告)日：2011-09-06

申请号：US12166910

申请日：2008-07-02

Applicant: Paul Dent

Inventor： Paul Dent

IPC: H04B1/00

CPC classification number: H04L27/3411 ,  H04B2201/70706 ,  H04L27/3416

Abstract: A transmitter and a method are described herein that can generate a radio signal with a reduced ratio of peak amplitude to root-mean-square amplitude which helps to improve the transmit efficiency of the transmitter's power amplifier. In addition, a receiver is also described herein that can decode the radio signal.

Abstract translation: 这里描述的发射器和方法可以产生具有降低的峰值幅度与均方根幅度的比率的无线电信号，这有助于提高发射机的功率放大器的发射效率。 此外，本文还描述了可以对无线电信号进行解码的接收机。