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    Code division multiple access base station transmitter
    83.
    发明授权
    Code division multiple access base station transmitter 失效
    码分多址基站发射机

    公开(公告)号：US5751705A

    公开(公告)日：1998-05-12

    申请号：US672599

    申请日：1996-06-28

    Applicant: Toshifumi Sato

    Inventor： Toshifumi Sato

    IPC: H04L27/26 ,  H04B1/707 ,  H04B7/26 ,  H04J13/00 ,  H04W52/52 ,  H04W72/04

    CPC classification number: H04B1/707 ,  H04B2201/70706

    Abstract: A digital base band section includes spread units for directly spreading input transmission data every channel by different spread codes to output spread signals, a summer for summing up the spread signals to output a multiplexed spread signal, a limiter for limiting an amplitude of the multiplexed spread signal not to exceed a predetermined value, and a roll-off filter limits a transmission spectrum by shaping a waveform of the transmission signal to output a digital base band signal to an analog base band/RF section, where it is converted into an analog base band signal by a digital-to-analog converter and a carrier is modulated to convert the analog base band signal into an RF signal in a modulator, which RF signal is amplified in a transmission power amplifier to transmit the amplified RF signal through a transmission antenna.

    Abstract translation: 数字基带部分包括用于通过不同的扩展码直接扩展输入传输数据的扩展单元，以输出扩展信号，用于对扩展信号进行求和以输出多路复用扩展信号的加法器，用于限制多路复用扩展的幅度的限制器 信号不超过预定值，并且滚降滤波器通过对发送信号的波形进行整形来限制发送频谱，以将数字基带信号输出到模拟基带/ RF部分，在模拟基带/ RF部分转换成模拟基带 通过数模转换器和载波调制频带信号，以将模拟基带信号转换成调制器中的RF信号，该RF信号在发射功率放大器中被放大，以通过发射天线发射放大的RF信号 。

    Low splatter peak-to-average signal reduction
    84.
    发明授权
    Low splatter peak-to-average signal reduction 失效
    低峰值到平均信号降低

    公开(公告)号：US5287387A

    公开(公告)日：1994-02-15

    申请号：US847535

    申请日：1992-03-06

    Applicant: Mark A. Birchler

    Inventor： Mark A. Birchler

    IPC: H03K5/08 ,  H04B1/04 ,  H04B1/707 ,  H04L27/26 ,  H04L25/49

    CPC classification number: H04L27/2602 ,  H03K5/08 ,  H04B1/0475 ,  H04L27/2624 ,  H04B2201/70706

    Abstract: In order to maintain low-splatter in a peak-to-average reduction for a linear communication system, a method of windowed-clipping is used. When a sample of input signal is determined to be above a predetermined threshold, a signal peak is found and an attenuating window is centered at the peak. The attenuating window is applied to the input signal.

    Abstract translation: 为了维持线性通信系统的峰值平均降低的低飞溅，使用窗口限幅的方法。 当输入信号的采样被确定为高于预定阈值时，发现信号峰值，并且衰减窗口以峰值为中心。 衰减窗口应用于输入信号。

    ESTIMATION APPARATUS AND COMPENSATION APPARATUS FOR CLIPPING DISTORTION OF MULTICARRIER SIGNALS AND RECEIVER
    87.
    发明申请
    ESTIMATION APPARATUS AND COMPENSATION APPARATUS FOR CLIPPING DISTORTION OF MULTICARRIER SIGNALS AND RECEIVER 有权
    用于剪辑多媒体信号和接收器失真的估计装置和补偿装置

    公开(公告)号：US20160269211A1

    公开(公告)日：2016-09-15

    申请号：US15062552

    申请日：2016-03-07

    Applicant: FUJITSU LIMITED

    Inventor： Zhenning TAO ,  Hao CHEN

    IPC: H04L27/26 ,  H04L12/26

    CPC classification number: H04L27/2623 ,  H03F1/3247 ,  H03F2201/3227 ,  H04B2201/70706 ,  H04L1/0026 ,  H04L27/2624 ,  H04L27/368

    Abstract: Embodiments of the present disclosure provide an estimation apparatus and compensation apparatus for clipping distortion of multicarrier signals and a receiver. The estimation apparatus includes: a first calculating unit configured to multiply an error signal of each subcarrier in all or part of subcarriers in received multicarrier signals by a conjugation of an error signal of a subcarrier neighboring or spaced apart from each subcarrier; a second calculating unit configured to calculate an average value of all results of multiplication; a third calculating unit configured to calculate parameters of the clipping distortion of the multicarrier signals according to the average value; and an estimating unit configured to estimate the clipping distortion of the multicarrier signals according to the calculated parameters of the clipping distortion. By calculating the parameters of the clipping distortion of the multicarrier signals according to the error signals of the subcarriers, the clipping distortion of the multicarrier signals may be accurately estimated and compensated, with the method of calculation being simple and the bit error rate being low.

    Abstract translation: 本公开的实施例提供了一种用于限制多载波信号和接收机的失真的估计装置和补偿装置。 所述估计装置包括：第一计算单元，被配置为通过与每个子载波相邻或间隔开的子载波的误差信号的共轭，将接收的多载波信号中的全部或部分子载波中的每个子载波的误差信号相乘; 第二计算单元，被配置为计算所有乘法结果的平均值; 第三计算单元，被配置为根据平均值计算多载波信号的削波失真的参数; 以及估计单元，被配置为根据计算出的限幅失真的参数来估计多载波信号的限幅失真。 通过根据子载波的误差信号计算多载波信号的限幅失真的参数，可以精确地估计和补偿多载波信号的削波失真，计算方法简单，误码率低。

    PEAK SUPPRESSION DEVICE
    88.
    发明申请
    PEAK SUPPRESSION DEVICE 有权
    峰值抑制器件

    公开(公告)号：US20160119172A1

    公开(公告)日：2016-04-28

    申请号：US14862557

    申请日：2015-09-23

    Applicant: FUJITSU LIMITED

    Inventor： HIROYOSHI ISHIKAWA ,  TOSHIO KAWASAKI ,  Hikaru Ishikawa ,  Kazuo Nagatani

    IPC: H04L27/26

    CPC classification number: H04L27/2624 ,  H04B2201/70706 ,  H04L25/03834

    Abstract: A peak suppression device includes an acquiring unit that acquires multiple envelopes of carrier signals that are included in a multicarrier signal, an adding unit that adds the envelopes to generate a combined envelope, a detecting unit that detects a peak value and a peak timing of the multicarrier signal by using the combined envelope, and a suppressing unit that suppresses a peak of the multicarrier signal in accordance with the peak value and the peak timing.

    Abstract translation: 峰值抑制装置包括：获取单元，其获取多载波信号中包含的载波信号的多个包络;相加单元，其对所述包络进行相加以生成组合包络;检测单元，其检测所述多个载波信号的峰值和峰值定时 通过使用组合包络的多载波信号，以及根据峰值和峰值定时抑制多载波信号的峰值的抑制单元。

    PEAK SUPPRESSING DEVICE AND PEAK SUPPRESSING METHOD
    89.
    发明申请
    PEAK SUPPRESSING DEVICE AND PEAK SUPPRESSING METHOD 有权
    峰值抑制器件和峰值抑制方法

    公开(公告)号：US20150358189A1

    公开(公告)日：2015-12-10

    申请号：US14761766

    申请日：2013-12-04

    Applicant: NEC Corporation

    Inventor： Yoshiaki DOI

    IPC: H04L27/26 ,  H04B1/04

    CPC classification number: H04L27/2614 ,  H03F3/24 ,  H03H17/0294 ,  H04B1/04 ,  H04B2001/0408 ,  H04B2201/70706 ,  H04L27/2624

    Abstract: A peak suppressing device (10) includes: a subtracting unit (11) that subtracts a predetermined threshold from an amplitude value of an input signal and generates a first peak signal; a multiplying unit (12) that multiplies the first peak signal by a weight coefficient and generates a second peak signal; a band limiting filter (13) that limits a band of the second peak signal, and generates a third peak signal; a subtracting unit (14) that subtracts the third peak signal from the input signal; and a weight coefficient generating unit (15) that generates the weight coefficient based on a value, the value being an amplitude value of the first peak signal divided by an amplitude value of a fourth peak signal generated when a convolution arithmetic operation is performed on by using at least a tap coefficient used in a center tap of the band limiting filter (13).

    Abstract translation: 峰值抑制装置（10）包括：减法单元，其从输入信号的振幅值中减去预定阈值，并产生第一峰值信号; 乘法单元（12），其将所述第一峰值信号乘以权重系数并产生第二峰值信号; 带限制滤波器（13），其限制所述第二峰值信号的频带，并产生第三峰值信号; 减法单元，从所述输入信号中减去所述第三峰值信号; 以及权重系数生成单元（15），其基于值来生成所述权重系数，所述值是所述第一峰值信号的振幅值除以当执行卷积算术运算时产生的第四峰值信号的振幅值，所述振幅值由 使用在带限滤波器（13）的中心抽头中使用的抽头系数的至少一个。

    Peak-to-peak average power ratio reduction and intermodulation distortion pre-suppression using open-loop signal processing
    90.
    发明授权
    Peak-to-peak average power ratio reduction and intermodulation distortion pre-suppression using open-loop signal processing 有权
    使用开环信号处理的峰峰值平均功率比降低和互调失真预抑制

    公开(公告)号：US08963608B1

    公开(公告)日：2015-02-24

    申请号：US14267391

    申请日：2014-05-01

    Applicant: L-3 Communications Corp.

    Inventor： June Y. Sun ,  William K. McIntire

    IPC: H03K5/08

    CPC classification number: H04L27/2623 ,  H04B2201/70706

    Abstract: The peak-to-average power ratio of an input signal can be reduced prior to amplification. This reduction in the peak-to-average power ratio can be accomplished without adding significant intermodulation distortion to the input signal. The resulting input signal can therefore have a peak-to-average power ratio that does not exceed the output backoff of the amplifier thereby preventing the amplifier from being operated in saturation and, as a result, minimizing the intermodulation distortion added by the amplifier. The peak-to-average power ratio of an input signal can be reduced using two stages of signal clipping. By employing two stages, the intermodulation distortion introduced to the input signal as it passes through the stages is minimized. Also, because this two-stage approach does not attempt to account for intermodulation distortion introduced by the downstream amplifier, it can be implemented without any prior knowledge of the amplifier's transfer function or any output monitoring scheme.

    Abstract translation: 输入信号的峰均功率比可以在放大之前降低。 可以实现峰均功率比的这种降低，而不会对输入信号增加显着的互调失真。 因此，所得到的输入信号可以具有不超过放大器的输出回退的峰均功率比，从而防止放大器在饱和状态下操作，并且因此使由放大器添加的互调失真最小化。 可以使用两级信号削波来降低输入信号的峰均功率比。 通过采用两级，当输入信号通过级时引入的互调失真最小化。 而且，由于这种两级方法并不试图解释由下游放大器引入的互调失真，所以可以在没有放大器传递函数或任何输出监视方案的任何先验知识的情况下实现。

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