公开(公告)号：US20060120447A1

公开(公告)日：2006-06-08

申请号：US11188771

申请日：2005-07-26

Applicant: Jason Trachewsky ,  Rajendra Moorti

Inventor： Jason Trachewsky ,  Rajendra Moorti

IPC: H04B1/66

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.

公开(公告)号：US07035245B2

公开(公告)日：2006-04-25

申请号：US10083655

申请日：2002-02-27

Applicant: Richard S. Orr ,  Boris Veytsman

Inventor： Richard S. Orr ,  Boris Veytsman

IPC: H04B7/216

CPC classification number: H04B1/707 ,  H04B2201/70706 ,  H04B2201/709709 ,  H04J13/0022 ,  H04L27/20

Abstract: CDMA codes are multiplexed into a constant-envelope composite signal using weighted majority logic. Based on a commanded power allocation among the signal codes, each signal code is assigned a weighting coefficient dictating the voting power the signal code has each time a vote is conducted, in a manner analogous to corporate shareholder voting. To multiplex the signal codes, a majority vote is conducted each chip period by summing the weighted chip values of the signal codes and assigning a binary value to the majority-voted composite chip based on the sign of the sum. An RF carrier is modulated in accordance with the value of the composite chip. The desired power distribution is achieved by requiring the power ratio of each signal code to be proportional to the square of the expected value of the cross-correlation between the signal code and a stored replica of the signal code at the receiver.

公开(公告)号：US07023900B2

公开(公告)日：2006-04-04

申请号：US10022767

申请日：2001-12-14

Applicant: Joseph Robert Cleveland

Inventor： Joseph Robert Cleveland

IPC: H04B1/69

CPC classification number: H04B1/7097 ,  H04B2201/70706 ,  H04J13/0048

Abstract: A CDMA transmitter that limits the peak-to-average ratio to a selected maximum level. The CDMA transmitter comprises: 1) a first baseband combiner for receiving N baseband chip streams, each of the N baseband chip streams comprising a sequence of chips, each chip having one of a positive amplitude value and a negative amplitude value, wherein the first baseband combiner combines chips from corresponding time slots in each of the N baseband chip streams to thereby generate a first composite baseband chip sequence; 2) a data processor for detecting a first peak amplitude in the first composite baseband chip sequence that exceeds a pre-determined maximum threshold and determining an amplitude and a polarity of a first compensation pulse associated with the first peak amplitude; and 3) a pulse generator for generating the first compensation pulse having the amplitude and the polarity determined by the data processor. The first baseband combiner then combines the first compensation pulse with the first composite baseband chip sequence during a chip time slot corresponding to the first peak amplitude.

公开(公告)号：US07013161B2

公开(公告)日：2006-03-14

申请号：US10254499

申请日：2002-09-24

Applicant: Bradley John Morris

Inventor： Bradley John Morris

IPC: H04B7/00

CPC classification number: H03G7/002 ,  H03G7/007 ,  H04B1/707 ,  H04B2201/70706 ,  H04L27/2624

Abstract: Large signal peaks (for example, peaks 105 and 110) can dramatically increase the cost of a communications device by requiring high grade power amplifiers. Peak reduction can reduce the large peaks at a cost of increasing spurious emissions. A circuit (for example, circuit 500) combining a scaling window peak reducing unit (for example, unit 507) and a filter (for example, filter 509) can effectively reduce the signal peaks without significantly increasing spurious emissions.

Abstract translation: 大的信号峰值（例如，峰值105和110）可以通过要求高等级的功率放大器来显着地增加通信设备的成本。 峰值降低可以以增加杂散发射为代价减少大峰值。 组合缩放窗口峰值降低单元（例如，单元507）和滤波器（例如，滤波器509）的电路（例如，电路500）可以有效地减少信号峰值而不显着增加杂散发射。

公开(公告)号：US07003269B2

公开(公告)日：2006-02-21

申请号：US10081596

申请日：2002-02-20

Applicant: Serge Willenegger

Inventor： Serge Willenegger

IPC: H04Q7/20

CPC classification number: H04B1/707 ,  H04B2201/70706 ,  H04J13/0044

Abstract: Method and apparatus for determining a transmission configuration for a dedicated channel in a wireless communication system. In one embodiment, an optimum configuration is determined based on minimizing Peak-to-Average Ratio (PAR) of the channel. The configuration is defined as a transmission pair of transmission branch and spreading code. The transmission branch may be the In-Phase (I) branch or the Quadrature (Q) branch. PAR analysis may be performed off-line to determine the optimum configuration. In operation, if the spreading code of the optimum configuration is used by another channel, the next best optimum code is used.

公开(公告)号：US06999733B2

公开(公告)日：2006-02-14

申请号：US10412247

申请日：2003-04-14

Applicant: Kazuyuki Hori ,  Takashi Yano

Inventor： Kazuyuki Hori ,  Takashi Yano

IPC: H04B1/04

CPC classification number: H04B1/707 ,  H04B2201/70706

Abstract: In the conventional peak factor reduction technique, since the signal has been changed over broad time width before and behind the peak amplitude, the deterioration in signal quality has been great. Through the use of a compensating signal having impulse property that is generated on the peak amplitude, subtraction from the peak amplitude will be performed. Thereby, since it is possible to reduce the deterioration in signal quality that occurs when reducing the peak factor, the peak factor reduction effect can be further enhanced in the same deterioration in signal quality as the conventional one.

Abstract translation: 在传统的峰值因子降低技术中，由于信号已经在峰值幅度之前和之后的宽时间宽度上被改变，信号质量的恶化已经很大。 通过使用具有在峰值振幅上产生的脉冲特性的补偿信号，将从峰值振幅进行减法。 因此，由于可以减少在降低峰值因子时发生的信号质量的劣化，因此与以往相同的信号质量劣化可以进一步提高峰值因数降低效果。

公开(公告)号：US20050265292A1

公开(公告)日：2005-12-01

申请号：US11137384

申请日：2005-05-26

Applicant: Hirosada Atsuta

Inventor： Hirosada Atsuta

IPC: H04B1/707 ,  H03G3/30 ,  H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04J13/00 ,  H04W52/04 ,  H04W52/34 ,  H04B7/216

CPC classification number: H04W52/34 ,  H04B2201/70706

Abstract: In a transmission signal generating circuit, spreading processing circuits spread transmission data to output spread transmission signals. Power class selecting circuits categorize the spread transmission signals into power classes. First adding circuits add/combine the spread transmission signals. Multipliers adjust transmission powers of the spread transmission signals for the respective power classes. A second adding circuit adds/combines the spread transmission signals. A total transmission power measuring means measures a total transmission power. A nonlinear quantization means nonlinearly quantizes the total transmission power and outputs a power level. A power limitation control memory outputs a multiplication coefficient for a power class for which transmission power control is permitted. Selectors select, when transmission power control is permitted for the power class, a multiplication coefficient from the power limitation control memory and output it to the multiplier corresponding to the power class, and select, when transmission power control is inhibited for the power class, a multiplication coefficient formed from a predetermined fixed value, and output it to the multiplier corresponding the power class. A radio base station communication apparatus is also disclosed.

Abstract translation: 在发送信号发生电路中，扩展处理电路将发送数据扩展成输出扩展发送信号。 功率级选择电路将扩展的传输信号分类为功率等级。 第一加法电路加/合扩展传输信号。 乘法器调整各个功率等级的扩展传输信号的传输功率。 第二加法电路将扩展的传输信号相加/组合。 总发射功率测量装置测量总发射功率。 非线性量化装置非线性地量化总发射功率并输出功率电平。 功率限制控制存储器输出允许发送功率控制的功率等级的乘法系数。 选择器在功率级别允许发射功率控制时选择来自功率限制控制存储器的乘法系数，并将其输出到与功率等级对应的乘法器，并且当功率类别的发射功率控制被禁止时，选择 乘法系数从预定的固定值形成，并将其输出到与功率等级对应的乘法器。 还公开了一种无线基站通信装置。

公开(公告)号：US06968202B2

公开(公告)日：2005-11-22

申请号：US10090563

申请日：2002-03-04

Applicant: Faith M. Ozluturk ,  Brian Kiernan

Inventor： Faith M. Ozluturk ,  Brian Kiernan

IPC: H03G3/20 ,  H03G11/04 ,  H04B1/04 ,  H04B1/707 ,  H04B7/005 ,  H04B7/216 ,  H04W52/22 ,  H04W52/34 ,  H04B7/00 ,  H04Q7/20

CPC classification number: H04W52/343 ,  H03G11/04 ,  H04B1/707 ,  H04B2201/70706 ,  H04W52/143 ,  H04W52/225 ,  H04W52/346 ,  H04W52/367 ,  H04W88/08

Abstract: A method for operating a user equipment employing a CDMA technique comprises combining a plurality of spread spectrum data signals into a combined signal having a fluctuating power level corresponding to the data signals; modulating the combined signal to produce an RF signal; measuring average power of the combined signal over a selected time period; adaptively limiting the combined signal power to a calculated level based at least in part on the measured power; and transmitting the RF signal.

Abstract translation: 一种用于操作使用CDMA技术的用户设备的方法包括将多个扩展频谱数据信号组合成具有与数据信号对应的波动功率电平的组合信号; 调制组合信号以产生RF信号; 在所选择的时间段内测量组合信号的平均功率; 至少部分地基于测量的功率将组合的信号功率自适应地限制到计算的电平; 并发送RF信号。

公开(公告)号：US20050249311A1

公开(公告)日：2005-11-10

申请号：US10841657

申请日：2004-05-07

Applicant: Bryan Nollett ,  John Oliver ,  Douglas Jones

Inventor： Bryan Nollett ,  John Oliver ,  Douglas Jones

IPC: H04B1/707 ,  H04J11/00 ,  H04L23/02 ,  H04L25/49

CPC classification number: H04B1/707 ,  H04B2201/70706

Abstract: A method in a radio transmitter, the method including generating indices, for example, with an index generator (132), encoding information by selecting different subsets of correlation-separable signals, for example, by multiplexing orthogonal spreading codes with indices input to a multiplexor (142), encoding information by modulating at least some of the indices with a modulator (134), and combining the information encoded by selecting the different subsets of correlation-separable signals with the information encoded by modulating at least some of the indices.

Abstract translation: 一种无线电发射机中的方法，该方法包括例如利用索引发生器（132）生成索引，通过选择不同的相关可分离信号子集来编码信息，例如通过将正交扩展码与输入到多路复用器的索引 （142），通过用调制器（134）调制至少一些索引来编码信息，以及将通过选择不同相关可分离信号子集编码的信息与通过调制至少一些索引编码的信息进行组合。

公开(公告)号：US20050243895A1

公开(公告)日：2005-11-03

申请号：US10835085

申请日：2004-04-29

Applicant: Alexei Ashikhmin ,  Jung-Tao Liu

Inventor： Alexei Ashikhmin ,  Jung-Tao Liu

IPC: H04J11/00 ,  H04B1/707

CPC classification number: H04J13/00 ,  H04B2201/70706 ,  H04J13/10

Abstract: A method and apparatus are provided for generating a code book for use in a CDMA system. The code book comprises of a plurality of vectors that are used to encode user data. The amplitude and polarity for each vector in the code book are selected to provide a reduced peak-to-average power ratio. The amplitude values can be selected to provide a reduced peak-to-average power ratio while maintaining a desired average energy per chip. The desired energy per chip can be based on the energy per chip of a CDMA system having a lower order spreading factor. Performance can be further improved by employing a first code book under a first signal-to-noise ratio condition and a second code book under a second signal-to-noise ratio condition.

Abstract translation: 提供了一种生成用于CDMA系统的码本的方法和装置。 码本由用于编码用户数据的多个向量组成。 选择码本中每个矢量的幅度和极性以提供降低的峰均功率比。 可以选择振幅值以提供降低的峰均功率比，同时保持每芯片所需的平均能量。 每个芯片的期望能量可以基于具有较低阶扩频因子的CDMA系统的每芯片的能量。 通过在第一信噪比条件下采用第一码本和第二信噪比条件下的第二码本可以进一步提高性能。