公开(公告)号：US08477594B2

公开(公告)日：2013-07-02

申请号：US13196082

申请日：2011-08-02

Applicant: Jason Alexander Trachewsky ,  Rajendra T. Moorti

Inventor： Jason Alexander Trachewsky ,  Rajendra T. Moorti

IPC: H04J11/00 ,  H04J1/16

CPC classification number: H04L27/2613 ,  H04B2201/70701 ,  H04B2201/70706 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/262

Abstract: A network device for generating an expanded long training sequence with a minimal peak-to-average ratio. The network device includes a signal generating circuit for generating the expanded long training sequence. The network device also includes an Inverse Fourier Transform for processing the expanded long training sequence from the signal generating circuit and producing an optimal expanded long training sequence with a minimal peak-to-average ratio. The expanded long training sequence and the optimal expanded long training sequence are stored on more than 52 sub-carriers.

Abstract translation: 一种用于产生具有最小峰均比的扩展长训练序列的网络设备。 网络设备包括用于生成扩展的长训练序列的信号发生电路。 网络设备还包括用于从信号发生电路处理扩展的长训练序列的逆傅里叶变换，并产生具有最小峰均比的最佳扩展长训练序列。 扩展的长训练序列和最佳扩展长训练序列存储在52个子载波上。

公开(公告)号：US20120300824A1

公开(公告)日：2012-11-29

申请号：US13575009

申请日：2010-11-15

Applicant: Takashi Maehata ,  Mikhail Illarionov

Inventor： Takashi Maehata ,  Mikhail Illarionov

IPC: H04B1/04 ,  H04B17/00

CPC classification number: H04L27/2624 ,  H04B2201/70706

Abstract: An object of the present invention is to provide a peak power suppressing circuit 9 that can suppress a peak power of an IQ baseband signal more assuredly.The present invention relates to the peak power suppressing circuit 9 that performs a clipping process on an IQ baseband signal. The suppressing circuit 9 includes a power calculation section 13 that calculates an instantaneous power P of an IQ baseband signal, a pulse retention section 22 that retains a cancellation pulse S that has a frequency component in a frequency band B of the IQ baseband signal and a frequency component outside the frequency band, and a clipping processing section 17 that subtracts, from an IQ baseband signal whose instantaneous power P that has been calculated is greater than a predetermined threshold Pth, cancellation signals Ic and Qc obtained by multiplying increments ΔI and ΔQ of the IQ baseband signal from the threshold Pth by the cancellation pulse S.

Abstract translation: 本发明的目的是提供一种可以更可靠地抑制IQ基带信号的峰值功率的峰值功率抑制电路9。 本发明涉及对IQ基带信号进行限幅处理的峰值功率抑制电路9。 抑制电路9包括计算IQ基带信号的瞬时功率P的功率计算部13，保持具有IQ基带信号的频带B的频率成分的抵消脉冲S的脉冲保持部22，以及 频率分量在频带外的削波处理部17以及从计算出的瞬时功率P大于预定阈值Pth的IQ基带信号中减去取消信号Ic和Qc的削波处理部17，增量＆Dgr; I和 来自阈值Pth的IQ基带信号的Q和消除脉冲S

公开(公告)号：US08064853B2

公开(公告)日：2011-11-22

申请号：US12605264

申请日：2009-10-23

Applicant: Leonard Joseph Cimini, Jr. ,  Nelson Ray Sollenberger

Inventor： Leonard Joseph Cimini, Jr. ,  Nelson Ray Sollenberger

IPC: H04J13/00 ,  H04B1/04

CPC classification number: H04L27/2623 ,  H04B1/0475 ,  H04B7/2628 ,  H04B2201/70706 ,  H04L27/2614 ,  H04L27/2621

Abstract: The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity. In particular, according to one embodiment utilizing the PTS approach, an iterative technique is used to assign phase factors to each of a set of partial transmit sequences from a set of possible phase factors. Experimental results using the iterative technique showed only a slight degradation (1 dB) from the optimal approach using the same number of subblocks and subcarriers. In an alternative embodiment, which avoids feedback required by the iterative approach, a sequence of phase factors are generated randomly and assigned to each of a set of partial transmit sequences. This procedure is repeated for a pre-determined number of trials and the random sequence generating the lowest PAP is selected. In a third embodiment, a set of phase factors is generated using a structured sequence such as a Walsh sequence.

Abstract translation: 本发明提供一种降低计算复杂度低的信号的峰均功率比（PAP）的方法和系统。 根据一个实施例，本发明应用于减少OFDM信号的PAP。 根据替代实施例，本发明被应用于减少CDMA信号的PAP。 本发明不是寻求涉及大量计算复杂度的最佳解决方案，而是提供了许多用于减少OFDM信号的PAP但具有低得多的计算复杂度的次优技术。 特别地，根据利用PTS方法的一个实施例，使用迭代技术来从一组可能的相位因子将相位因子分配给一组部分发送序列中的每一个。 使用迭代技术的实验结果显示，使用相同数量的子块和子载波的最优方法仅显示轻微的退化（1 dB）。 在避免迭代方法所需的反馈的替代实施例中，随机产生一系列相位因子并分配给一组部分发送序列中的每一个。 对于预定数量的试验重复该过程，并且选择产生最低PAP的随机序列。 在第三实施例中，使用诸如沃尔什序列的结构化序列来生成一组相位因子。

公开(公告)号：US08059697B2

公开(公告)日：2011-11-15

申请号：US12166883

申请日：2008-07-02

Applicant: Paul Dent

Inventor： Paul Dent

IPC: H04B1/00 ,  H04K1/10

CPC classification number: H04L27/3411 ,  H04B2201/70706 ,  H04J13/0077

Abstract: A transmitter and a method are described herein that generate a reduced peak-to-rms ratio multicode radio signal which helps to conserve battery life and increase the communication range and average data throughput rate.

Abstract translation: 这里描述了一种发射机和方法，其产生减小的峰均比MS多码无线电信号，其有助于节省电池寿命并增加通信范围和平均数据吞吐率。

公开(公告)号：US20110268167A1

公开(公告)日：2011-11-03

申请号：US13180828

申请日：2011-07-12

Applicant: Lars Sundström

Inventor： Lars Sundström

IPC: H04W24/00

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：US20110249768A1

公开(公告)日：2011-10-13

申请号：US13130948

申请日：2009-11-27

Applicant: Toshihide Kuwabara

Inventor： Toshihide Kuwabara

IPC: H04L27/00 ,  G06G7/16

CPC classification number: H04B1/707 ,  H04B2201/70706

Abstract: A peak suppression device includes: a peak determination unit which determines a peak value of a waveform of an input signal; an impulse signal generation unit which generates an impulse signal corresponding to a difference between the peak value and a predetermined value if an absolute value of the peak value is greater than the predetermined value; a multiplication unit which multiplies the generated impulse signal by a predetermined impulse response waveform so as to generate a peak suppression signal; and a subtraction unit which subtracts the peak suppression signal from the input signal.

Abstract translation: 峰值抑制装置包括：峰值确定单元，确定输入信号的波形的峰值; 脉冲信号生成单元，如果峰值的绝对值大于预定值，则产生与峰值和预定值之间的差相对应的脉冲信号; 乘法单元，将所生成的脉冲信号乘以预定的脉冲响应波形，以产生峰值抑制信号; 以及从输入信号中减去峰值抑制信号的减法单元。

公开(公告)号：US08031757B2

公开(公告)日：2011-10-04

申请号：US12823308

申请日：2010-06-25

Applicant: Louis Jacobus Botha ,  Frederic Christian Hayem ,  Hendrik Johannes Conroy

Inventor： Louis Jacobus Botha ,  Frederic Christian Hayem ,  Hendrik Johannes Conroy

IPC: H04B3/36 ,  H04L12/66 ,  G01S31/02

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B2201/70706

Abstract: A method for operating a Radio Frequency (RF) receiver of a wireless terminal. During a first time interval, an RF front end is enabled and the RF receiver receives and processes an RF signal, e.g., a Wideband Code Division Multiple Access (WCDMA) signal, to produce a baseband signal and to store samples of the baseband signal. During a second time interval that differs from the first time interval, the RF front end is disabled and the RF receiver processes the plurality of samples of the baseband signal of the first time interval to measure signal strengths of a plurality of pilot signals present in the baseband signal of the first time interval. Finally, during a third time interval that differs from the first time interval and the second time interval, the RF front end is enabled and the RF receiver receives and processes an RF signal of the third time interval to extract data there from. Memory is shared between the first, second, and third time intervals for different uses.

Abstract translation: 一种用于操作无线终端的射频（RF）接收机的方法。 在第一时间间隔期间，RF前端被使能，并且RF接收器接收并处理诸如宽带码分多址（WCDMA）信号的RF信号，以产生基带信号并存储基带信号的采样。 在与第一时间间隔不同的第二时间间隔期间，RF前端被禁用，并且RF接收器处理第一时间间隔的基带信号的多个采样以测量存在于第一时间间隔中的多个导频信号的信号强度 第一时间间隔的基带信号。 最后，在与第一时间间隔和第二时间间隔不同的第三时间间隔期间，RF前端被使能，RF接收器接收并处理第三时间间隔的RF信号以从中提取数据。 在不同用途的第一，第二和第三时间间隔之间共享内存。

公开(公告)号：US07899127B2

公开(公告)日：2011-03-01

申请号：US11270312

申请日：2005-11-09

Applicant: Heinrich Schenk

Inventor： Heinrich Schenk

IPC: H04L5/12

CPC classification number: H04L27/2614 ,  H04B2201/70706

Abstract: A method and a device for reducing the crest factor of a signal is operable to generate a correction signal as a combination of a plurality of partial correction signals having respectively predetermined frequencies and a signal having a reduced crest factor being issued as a differential between the correction signal and the signal. The respectively predetermined frequencies are selected such that the correction signal, which has a period length that is shorter than a length of the signal, is periodic. Therefore, according to the invention, only one period of the correction signal is determined and the correction signal is then determined as a periodic continuation of the one period.

Abstract translation: 用于降低信号的波峰因数的方法和装置可操作以产生校正信号，作为具有分别预定频率的多个部分校正信号和具有降低的波峰因数的信号作为校正之间的差分而被发出的组合 信号和信号。 选择分别预定的频率使得具有比信号的长度短的周期长度的校正信号是周期性的。 因此，根据本发明，仅确定校正信号的一个周期，然后将校正信号确定为该周期的周期性延续。

公开(公告)号：US20100322199A1

公开(公告)日：2010-12-23

申请号：US12747901

申请日：2008-12-10

Applicant: Lennart Andersson

Inventor： Lennart Andersson

IPC: H04B7/216

CPC classification number: H04J13/16 ,  H04B2201/70706

Abstract: A method of channelization code selection for up-link transmission of a wireless communication system is disclosed. The method comprises determining, based on a first power limitation indication value associated with a first terminal of the wireless communication system, if the first terminal is power limited; dynamically selecting at least one first channelization code associated with a first signal variation value for allocation to the first terminal so that, if the first terminal is power limited, the first signal variation value indicates a first minimal signal variation; and signaling an indication of the at least one first channelization code to the first terminal. Corresponding arrangements are also disclosed.

公开(公告)号：US20100265995A1

公开(公告)日：2010-10-21

申请号：US12823308

申请日：2010-06-25

Applicant: LOUIS JACOBUS BOTHA ,  FREDERIC CHRISTIAN HAYEM ,  HENDRIK JOHANNES CONROY

Inventor： LOUIS JACOBUS BOTHA ,  FREDERIC CHRISTIAN HAYEM ,  HENDRIK JOHANNES CONROY

IPC: H04B1/707 ,  H04L27/00

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B2201/70706

Abstract: A method for operating a Radio Frequency (RF) receiver of a wireless terminal. During a first time interval, an RF front end is enabled and the RF receiver receives and processes an RF signal, e.g., a Wideband Code Division Multiple Access (WCDMA) signal, to produce a baseband signal and to store samples of the baseband signal. During a second time interval that differs from the first time interval, the RF front end is disabled and the RF receiver processes the plurality of samples of the baseband signal of the first time interval to measure signal strengths of a plurality of pilot signals present in the baseband signal of the first time interval. Finally, during a third time interval that differs from the first time interval and the second time interval, the RF front end is enabled and the RF receiver receives and processes an RF signal of the third time interval to extract data there from. Memory is shared between the first, second, and third time intervals for different uses.

Abstract translation: 一种用于操作无线终端的射频（RF）接收机的方法。 在第一时间间隔期间，RF前端被使能，并且RF接收器接收并处理诸如宽带码分多址（WCDMA）信号的RF信号，以产生基带信号并存储基带信号的采样。 在与第一时间间隔不同的第二时间间隔期间，RF前端被禁用，并且RF接收器处理第一时间间隔的基带信号的多个采样以测量存在于第一时间间隔中的多个导频信号的信号强度 第一时间间隔的基带信号。 最后，在与第一时间间隔和第二时间间隔不同的第三时间间隔期间，RF前端被使能，RF接收器接收并处理第三时间间隔的RF信号以从中提取数据。 在不同用途的第一，第二和第三时间间隔之间共享内存。