公开(公告)号：US20070189415A1

公开(公告)日：2007-08-16

申请号：US11476694

申请日：2006-06-29

Applicant: Toshio Kawasaki

Inventor： Toshio Kawasaki

IPC: H04L27/00

CPC classification number: H04B1/692 ,  H04B1/7097 ,  H04B2201/70706

Abstract: In a frequency-division multiplexing transmission apparatus for transmitting data in a frequency spectrum specific to a mobile station, a chip-dividing unit divides each symbol of a transmission-symbol sequence into chips; a first phase rotation unit performs π/2 phase rotation for the odd-numbered chips of the divided chips; a chip-repetition and rearrangement unit compresses the time domains of each chip of the chip sequence after phase rotation, then repeats the chips a specified number of times and rearranges the chips of the obtained repetitive-chip sequences so that they have the same arrangement as the original chip sequence; a second phase rotation unit performs phase rotation that changes at a speed specific to a mobile station for each chip of the rearranged repetitive-chip sequence; and a transmission unit transmits said phase-rotated chips.

Abstract translation: 在用于以特定于移动台的频谱中发送数据的频分复用发送装置中，芯片分割单元将发送符号序列的每个符号划分成码片; 第一相位旋转单元对分割的芯片的奇数芯片执行π/ 2相位旋转; 芯片重复和重排单元在相位旋转之后压缩芯片序列的每个芯片的时域，然后将芯片重复指定次数，并重新排列所获得的重复码片序列的码片，使得它们具有与 原始芯片序列; 第二相位旋转单元执行以重排列重复码片序列的每个码片为特定于移动站的速度改变的相位旋转; 并且发送单元发送所述相位旋转的码片。

公开(公告)号：US20070140105A1

公开(公告)日：2007-06-21

申请号：US11534791

申请日：2006-09-25

Applicant: Justin COON

Inventor： Justin COON

IPC: H04J11/00 ,  H04B7/216

CPC classification number: H04L5/0016 ,  H04B2201/70703 ,  H04B2201/70706 ,  H04B2201/709709 ,  H04J13/0074 ,  H04J13/18 ,  H04L5/0026 ,  H04L25/0242 ,  H04L25/03159 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2615 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: Code division multiple access (CDMA) is a popular multiple access technique that is used to support multiple users simultaneously in a network. Many variants of CDMA exist, including direct sequence (DS) CDMA, multi-carrier (MC) CDMA, cyclic prefixed (CP) CDMA, and chip interleaved block spread (CIBS) CDMA. In addition to these variations, many receiver architectures are often available for implementation in CDMA systems, such as the well-known RAKE receiver, interference cancellation receivers, and receivers that rely on channel equalisation.Some CDMA schemes are interference limited; that is to say, as the number of users in the network increases, residual interference caused by each user eventually cripples the network, thus rendering simultaneous multiple access nearly impossible. This residual interference generally results from the loss of orthogonality amongst users, which primarily occurs when the channel is temporally dispersive. Several recent developments in block CDMA systems have led to multi-user interference (Mu) free transmission techniques. In these systems, any number of users—up to a given maximum number—can theoretically transmit simultaneously without causing any degradation in system performance. Beyond this maximum number of allowable users, the system becomes interference limited in a similar manner to other CDMA systems.The invention detailed here is in some ways a generalisation of many of the MUI-free techniques given above. In particular, it addresses three important special cases: reduced-complexity SC-FDMA, reduced-complexity OFDMA, and self-shift-orthogonal CP-CDMA. These methods provide scalable, low-complexity, MUI-free techniques. Furthermore, these techniques can easily be extended to multiple-input multiple-output (MIMO) systems.

Abstract translation: 码分多址（CDMA）是一种流行的多址技术，用于在网络中同时支持多个用户。 存在CDMA的许多变型，包括直接序列（DS）CDMA，多载波（MC）CDMA，循环前缀（CP）CDMA和码片交织块扩展（CIBS）CDMA。 除了这些变化之外，许多接收机架构通常可用于在CDMA系统中实现，例如公知的RAKE接收机，干扰消除接收机和依赖于信道均衡的接收机。 一些CDMA方案受到干扰限制; 也就是说，随着网络中的用户数量的增加，每个用户造成的残留干扰最终会削弱网络，从而几乎不可能实现多次访问。 这种残留干扰通常源于用户之间的正交性损失，主要发生在信道在时间上分散时。 块CDMA系统中的几个最新发展已经导致多用户干扰（Mu）自由传输技术。 在这些系统中，任何数量的用户 - 直到给定的最大数量 - 理论上可以同时传输，而不会导致系统性能的任何降级。 除了最大允许用户数之外，系统以与其他CDMA系统类似的方式变得受到干扰限制。 这里详细描述的发明在某些方面是上面给出的许多无MUI的技术的概括。 特别地，它解决了三个重要的特殊情况：降低复杂度的SC-FDMA，降低复杂度OFDMA和自移位正交CP-CDMA。 这些方法提供可扩展的，低复杂度的无MUI的技术。 此外，这些技术可以容易地扩展到多输入多输出（MIMO）系统。

公开(公告)号：US07203247B2

公开(公告)日：2007-04-10

申请号：US09911139

申请日：2001-07-23

Applicant: Ruediger Bauder ,  Qing Yan ,  Jeffrey Lihbor Yiin

Inventor： Ruediger Bauder ,  Qing Yan ,  Jeffrey Lihbor Yiin

IPC: H04L25/49

CPC classification number: H04B1/707 ,  H04B1/62 ,  H04B2201/70706 ,  H04J13/0077 ,  H04L27/368

Abstract: A Wideband Code-Division Multiple Access (WCDMA) transceiver and a method of operating the same. In one embodiment, the transceiver includes: (1) a transmit chain having a lookup table that provides coefficients to a digital predistorter based on power indicators and (2) a predistorter training circuit, coupled to the transmit chain, that employs a receive chain of the WCDMA transceiver to provide a digital compensation signal that is a function of an output of the transmit chain and employs both the power indicators and the digital compensation signal to cause the lookup table to provide alternative coefficients to the digital predistorter thereby to reduce distortion in the output.

Abstract translation: 宽带码分多址（WCDMA）收发机及其操作方法。 在一个实施例中，收发器包括：（1）具有查找表的发射链，其基于功率指示器向数字预失真器提供系数;以及（2）耦合到所述发射链的预失真器训练电路，其使用接收链 WCDMA收发器提供作为发射链的输出的函数的数字补偿信号，并且使用功率指示符和数字补偿信号来使查找表向数字预失真器提供替代系数，从而减少在 输出。

公开(公告)号：US07174356B2

公开(公告)日：2007-02-06

申请号：US10602951

申请日：2003-06-24

Applicant: Gregory Agami ,  Ronald Rotstein

Inventor： Gregory Agami ,  Ronald Rotstein

IPC: G06F7/52

CPC classification number: H04B1/707 ,  G06F7/4812 ,  H04B2201/70706 ,  H04B2201/70707

Abstract: A method and apparatus for complex multiplication includes steps of: (a) receiving a complex multiplicand having a real value and an imaginary value (704); (b) generating a negation of the real value of the complex multiplicand (706); (c) generating a negation of the imaginary value of the complex multiplicand (708); (d) receiving a complex multiplier (710); and (e) selecting a phasor constant having a value wherein a complex product of the complex multiplicand times the complex multiplier times the phasor constant has a real value equal to one of the real value of the complex multiplicand, the imaginary value of the complex multiplicand, the negation of the real value of the complex multiplicand, and the negation of the imaginary value of the complex multiplicand (712).

Abstract translation: 复数乘法的方法和装置包括以下步骤：（a）接收具有实数值和虚数值的复数被乘数（704）; （b）产生复数被乘数的实数值的否定（706）; （c）产生复数被乘数的虚数值的否定值（708）; （d）接收复数乘法器（710）; 和（e）选择具有其复数乘数乘以相量常数的复乘乘数乘以复数被乘数之一的实数值的复数乘数的复数乘数的相量常数，复乘数的虚数值 ，复数被乘数的实数值的否定以及复数被乘数的虚数值的否定（712）。

公开(公告)号：US07164931B2

公开(公告)日：2007-01-16

申请号：US10090401

申请日：2002-03-04

Applicant: Fatih M. Ozluturk ,  Brian Kiernan

Inventor： Fatih M. Ozluturk ,  Brian Kiernan

IPC: 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 base station 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技术的基站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：US20060293004A1

公开(公告)日：2006-12-28

申请号：US11510764

申请日：2006-08-28

Applicant: Kiyoshi Irie ,  Kazuaki Hori ,  Kazuhiko Hikasa

Inventor： Kiyoshi Irie ,  Kazuaki Hori ,  Kazuhiko Hikasa

IPC: H01Q11/12 ,  H04B1/06 ,  H04B1/04

CPC classification number: H03G1/0088 ,  H03F3/45098 ,  H03F2200/294 ,  H03F2203/45496 ,  H03F2203/45504 ,  H03F2203/45722 ,  H03G1/0023 ,  H04B1/707 ,  H04B2201/70706

Abstract: The dynamic range is changed by switching a current applied to an amplifying circuit to obtain the minimum ICP required to keep linearity with the number of multiplexes even when the number of multiplexes of data is changed by switching the operation current of the amplifying circuits of the transmission system and also supplying the information about number of multiplexes of data to be transmitted to the amplifying circuits of the transmission system from the baseband circuit. Thereby, the signal can be transmitted without distortion even when the number of multiplexes increases and the current of the amplifying circuit may be reduced when the number of multiplexes is small in order to reduce the current consumption in the communication semiconductor integrated circuit device which can form a wireless communication system of the code division multiplex system such as W-CDMA system.

Abstract translation: 通过切换施加到放大电路的电流来改变动态范围，以便即使当通过切换传输的放大电路的操作电流来改变数据的多路复用数量时，获得与多路复用数保持线性关系所需的最小ICP 并且还从基带电路向发送系统的放大电路提供关于要发送的数据的复用数量的信息。 因此，即使多路复用数量增加，信号也可以无失真地发送，并且当多路复用数量少时可以减小放大电路的电流，以便减少可形成的通信半导体集成电路器件中的电流消耗 诸如W-CDMA系统的码分多路复用系统的无线通信系统。

公开(公告)号：US07145863B2

公开(公告)日：2006-12-05

申请号：US11033823

申请日：2005-01-13

Applicant: Kazuhito Niwano

Inventor： Kazuhito Niwano

IPC: H04J11/00

CPC classification number: H04B1/707 ,  H04B2201/70706 ,  H04B2201/709709

Abstract: A mobile station, and corresponding system and method, the mobile station including an IQ multiplexer configured to IQ multiplex transmission data for a data channel and a control data for control channel, and to generate a complex signal; and a transmitter configured to modulate the complex signal generated by the IQ multiplexer, and to transmit the modulated complex signal. When control data for a channel are added, the IQ multiplexer is further configured to assign the control data to be added to the I axis or the Q axis according to whether a set number for the data channel is an odd number or an even number.

Abstract translation: 一种移动台以及相应的系统和方法，所述移动台包括：IQ多路复用器，被配置为对数据信道进行IQ多路传输数据和控制信道的控制数据，并产生复信号; 以及发射机，被配置为调制由所述IQ多路复用器产生的复信号，并且发送所述经调制的复信号。 当添加通道的控制数据时，IQ多路复用器还被配置为根据数据通道的设定数是奇数还是偶数来分配要添加到I轴或Q轴的控制数据。

公开(公告)号：US07103088B2

公开(公告)日：2006-09-05

申请号：US11114397

申请日：2005-04-26

Applicant: Raj Mani Misra ,  Gregory S. Teal

Inventor： Raj Mani Misra ,  Gregory S. Teal

IPC: H04L27/30

CPC classification number: H04J13/16 ,  H04B1/707 ,  H04B2201/70703 ,  H04B2201/70706 ,  H04J13/0074 ,  H04J13/0077 ,  H04J13/10 ,  H04J13/107

Abstract: A spreading system and method for CDMA applications that requires fewer integer multiplications. User data is spread using real or complex integer based spreading codes of length SF to SFmax chips. At least one of the codes is of the form jn·v[n] where v[n] is a spreading code. The invention provides increased user separation using a plurality of spreading codes.

Abstract translation: CDMA应用的扩展系统和方法，需要较少的整数乘法。 使用长度为SF至SF最大码片的实数或复数整数扩展码扩展用户数据。 代码中的至少一个具有形式为v [n]的形式，其中v [n]是扩展码。 本发明使用多个扩展码提供增加的用户分离。

公开(公告)号：US20060159159A1

公开(公告)日：2006-07-20

申请号：US11332712

申请日：2006-01-13

Applicant: Daisuke Ogawa ,  Takashi Dateki ,  Hideto Furukawa ,  Nobukazu Fudaba

Inventor： Daisuke Ogawa ,  Takashi Dateki ,  Hideto Furukawa ,  Nobukazu Fudaba

IPC: H04B1/69

CPC classification number: H04L27/262 ,  H04B1/707 ,  H04B2201/70706 ,  H04B2201/709709 ,  H04L27/2621

Abstract: A wireless communication system, to control a peak power to an average power ratio because an amplifier characteristic of the wireless communication system include non-linear characteristic if input signal large the amplifier makes distortions. A wireless communication system comprises for suppressing a peak power to an average power ratio to process known signal like a pilot signal.

Abstract translation: 无线通信系统，用于将峰值功率控制为平均功率比，因为无线通信系统的放大器特性如果输入信号较大，放大器产生失真，则包括非线性特性。 无线通信系统包括用于抑制平均功率比的峰值功率以处理诸如导频信号的已知信号。

公开(公告)号：US20060141953A1

公开(公告)日：2006-06-29

申请号：US11354549

申请日：2006-02-14

Applicant: Serge Willenegger

Inventor： Serge Willenegger

IPC: H04B1/02 ,  H04B1/66

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.