公开(公告)号：US20090147834A1

公开(公告)日：2009-06-11

申请号：US11917792

申请日：2006-06-30

Applicant: Takaaki Kishigami ,  Hiroshi Iwai

Inventor： Takaaki Kishigami ,  Hiroshi Iwai

IPC: H04B1/707 ,  H04B1/06 ,  H04M1/00

CPC classification number: H04B1/18 ,  H04B1/0458 ,  H04B2201/70701

Abstract: An object of the invention is to stabilize the convergence operation at the automatic impedance matching time and ensure the reception quality in the convergence process in a fading environment in a radio communication apparatus which performs automatic impedance matching between an antenna and a Radio frequency section to decrease the impedance matching loss, for example, when the apparatus is brought close to a human body. A radio communication apparatus of the invention includes a Radio frequency section 3 which converts a received signal into a baseband signal, a variable impedance unit 2 which adjusts impedance between an antenna 1 and the Radio frequency section 3, a pilot signal extraction unit 4 which extracts a pilot signal from the baseband signal, a first channel compensation unit 5 which performs channel compensation using an output of the pilot signal extraction unit, an impedance control adequacy detection unit 7 which detects impedance control adequacy using an output of the first channel compensation unit, an impedance control unit 8 which controls the variable impedance unit 2 using an output of the impedance control adequacy detection unit, a second channel compensation unit 6 which performs channel compensation using the pilot signal, and a demodulation section 9 which performs the demodulation operation using an output of the second channel compensation unit.

Abstract translation: 本发明的一个目的是在自动阻抗匹配时间稳定收敛操作，并且确保在天线和射频部分之间进行自动阻抗匹配的无线电通信装置的衰落环境中的收敛过程中的接收质量降低 阻抗匹配损失，例如当该装置靠近人体时。 本发明的无线通信装置具有将接收信号转换为基带信号的射频部3，调整天线1与射频部3之间的阻抗的可变阻抗部2，提取出导频信号提取部4 来自基带信号的导频信号，使用导频信号提取单元的输出进行信道补偿的第一信道补偿单元5，使用第一信道补偿单元的输出来检测阻抗控制充分性的阻抗控制适合度检测单元7， 阻抗控制单元8，其使用阻抗控制充分性检测单元的输出来控制可变阻抗单元2;第二信道补偿单元6，其使用导频信号进行信道补偿;以及解调单元9，其使用 输出第二通道补偿单元。

公开(公告)号：US07532864B2

公开(公告)日：2009-05-12

申请号：US10524213

申请日：2004-02-16

Applicant: Masaru Fukuoka ,  Atsushi Sumasu ,  Sadayuki Abeta ,  Noriyuki Maeda ,  Hiroyuki Atarashi

Inventor： Masaru Fukuoka ,  Atsushi Sumasu ,  Sadayuki Abeta ,  Noriyuki Maeda ,  Hiroyuki Atarashi

IPC: H04B17/00

CPC classification number: H04B1/7097 ,  H04B17/345 ,  H04B2201/70701 ,  H04L1/20

Abstract: A pilot extract section 14 extracts a pilot signal from received signal. An adder 21 in-phase adds a plurality of correlated values of pilot signals for respective subcarriers. Delay devices 201-1 to 201-6 temporarily maintain one in-phase added value. Multiplier 202-1 to 202-6 multiplies a predetermined coefficient to the in-phase added value that is output from the delay device. The predetermined coefficient reflects the result, which is obtained by correcting for multiple times the difference of channel variation in the different subcarriers that is generated when noise power per one subcarrier is calculated. Each of the multiplying results is added by an adder 24, and is squared by a square device 25. A cumulative adder 26 cumulative-adds the squared values for the whole subcarrier. A multiplier 203 averages by multiplying predetermined values to the cumulative-added values. Having such configuration, even if the correlation between adjacent subcarriers becomes lower by frequency selective fading, the accuracy for estimating noise power can be improved.

Abstract translation: 导频提取部分14从接收信号中提取导频信号。 同相的加法器21对各个副载波添加导频信号的多个相关值。 延迟装置201-1至201-6暂时保持一个同相的附加值。 乘法器202-1至202-6将预定系数与从延迟装置输出的同相相加值相乘。 预定系数反映通过多次计算在每个子载波的噪声功率被计算时产生的不同子载波中的信道变化的差异而获得的结果。 乘法结果中的每一个由加法器24相加，并由平方装置25平方。累积加法器26对整个子载波进行累加 - 相加。 乘法器203通过将预定值乘以累积附加值来平均。 具有这样的配置，即使相邻副载波之间的相关性通过频率选择性衰落变得较低，也可以提高估计噪声功率的精度。

公开(公告)号：US20090103508A1

公开(公告)日：2009-04-23

申请号：US12340939

申请日：2008-12-22

Applicant: Gary Lomp ,  Fatih Ozluturk ,  John Kowalski

Inventor： Gary Lomp ,  Fatih Ozluturk ,  John Kowalski

IPC: H04B7/216

CPC classification number: H04B7/2637 ,  G06F13/374 ,  H03H17/0226 ,  H03H17/06 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70754 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/708 ,  H04B1/7085 ,  H04B1/709 ,  H04B1/7093 ,  H04B1/711 ,  H04B1/7115 ,  H04B1/712 ,  H04B7/2628 ,  H04B7/264 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/70707 ,  H04B2201/7071 ,  H04J13/00 ,  H04J13/004 ,  H04J13/0048 ,  H04J13/0077 ,  H04J13/10 ,  H04J13/107 ,  H04J13/12 ,  H04J13/16 ,  H04J2013/0037 ,  H04L1/0001 ,  H04L1/004 ,  H04L1/0042 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0059 ,  H04L5/1446 ,  H04L25/0212 ,  H04L27/206 ,  H04L27/2332 ,  H04L2027/003 ,  H04L2027/0053 ,  H04N1/00912 ,  H04N1/3333 ,  H04N2201/3335 ,  H04W52/04 ,  H04W52/08 ,  H04W52/143 ,  H04W52/146 ,  H04W52/24 ,  H04W52/241 ,  H04W52/245 ,  H04W52/247 ,  H04W52/26 ,  H04W52/262 ,  H04W52/322 ,  H04W52/325 ,  H04W52/343 ,  H04W52/346 ,  H04W52/36 ,  H04W52/367 ,  H04W52/44 ,  H04W52/50 ,  H04W52/52 ,  H04W52/54 ,  H04W52/60 ,  Y02D10/14

Abstract: A receiver receives signals and noise over a frequency spectrum of a desired received signal. The desired received signal is spread using code division multiple access. The received signals and noise are demodulated to produce a demodulated signal. The demodulated signal is despread using a code uncorrelated with a code associated with the desired received signal. A power level of the despread demodulated signal is measured as an estimate of the noise level of the frequency spectrum.

Abstract translation: 接收机通过所需接收信号的频谱接收信号和噪声。 期望的接收信号使用码分多址进行传播。 接收的信号和噪声被解调以产生解调信号。 使用与所需接收信号相关联的代码不相关的代码来解调解调信号。 解扩解调信号的功率电平被测量为频谱的噪声电平的估计。

公开(公告)号：US07519028B2

公开(公告)日：2009-04-14

申请号：US10378912

申请日：2003-03-05

Applicant: Masafumi Usuda ,  Takehiro Nakamura ,  Sadayuki Abeta

Inventor： Masafumi Usuda ,  Takehiro Nakamura ,  Sadayuki Abeta

IPC: H04Q7/00

CPC classification number: H04W16/28 ,  H04B7/0408 ,  H04B2201/70701 ,  H04B2201/709709 ,  H04L25/0226 ,  H04L25/0228 ,  H04W48/12

Abstract: A channel structure of a mobile communication system including a radio base station having a transmission antenna able to control a beam direction for each of a plurality of mobile stations in a cell. The mobile stations carry out radio communication using a shared channel together with an associated dedicated channel used in association with the shared channel. The shared channel is shared by the mobile stations and allocated to each of the mobile stations per predetermined unit transmission. A first pilot channel is set and dedicatedly used for channel estimation of the shared channel, and a second pilot channel is set and dedicatedly used for channel estimation of the associated dedicated channel.

Abstract translation: 一种移动通信系统的信道结构，包括具有能够控制小区中的多个移动站中的每一个的波束方向的发送天线的无线基站。 移动站使用共享信道与与共享信道相关联使用的相关专用信道一起进行无线电通信。 共享信道由移动台共享，并且每个预定单位传输分配给​​每个移动站。 第一导频信道被设置并专用于共享信道的信道估计，并且第二导频信道被设置并专用于相关专用信道的信道估计。

公开(公告)号：US20090080372A1

公开(公告)日：2009-03-26

申请号：US11994626

申请日：2006-07-05

Applicant: Katsuyoshi Naka ,  Hiroki Haga ,  Hidenori Matsuo

Inventor： Katsuyoshi Naka ,  Hiroki Haga ,  Hidenori Matsuo

IPC: H04W48/00 ,  H04W88/00

CPC classification number: H04J11/0069 ,  H04B1/70735 ,  H04B1/7083 ,  H04B2201/70701 ,  H04L5/0016 ,  H04L5/005 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2675 ,  H04W72/02 ,  H04W88/08

Abstract: Provided are a base station device and a mobile station device, which can lighten a cell-search processing. The base station device (100) includes a frame constitution unit (130) for forming a frame, in which a pilot symbol multiplied by a base station scrambling code assigned to that device and a plurality of sequences contained in the corresponding sequence set is arranged in at least the head or tail, and a radio transmission unit (155) for sending the formed frame. On the receiving side of the frame, the frame timing can be detected from the position of a pilot symbol contained in that frame. Since the base station scrambling code and the sequence set containing the sequences are made to correspond to each other, candidates can be narrowed to at most the base station scrambling codes of the number of the combinations of the sequences contained in the sequence set, by detecting the sequences multiplied by the pilot symbol, so that the cell search processing can be lightened.

Abstract translation: 提供了一种能够减轻小区搜索处理的基站装置和移动站装置。 基站设备（100）包括：帧构成单元（130），用于形成帧，其中将分配给该设备的基站扰码乘以的导频符号和相应序列集中包含的多个序列排列在 至少头部或尾部，以及用于发送形成的框架的无线电传输单元（155）。 在帧的接收侧，可以从包含在该帧中的导频符号的位置检测帧定时。 由于使基站扰频码和包含该序列的序列集彼此对应，因此可以通过检测候选，将候选数减至最多包含在序列集中的序列的组合数的基站扰码 序列乘以导频符号，使得可以减轻小区搜索处理。

公开(公告)号：US20090074086A1

公开(公告)日：2009-03-19

申请号：US11577791

申请日：2005-08-24

Applicant: Yutaka Murakami ,  Kiyotaka Kobayashi ,  Masayuki Orihashi

Inventor： Yutaka Murakami ,  Kiyotaka Kobayashi ,  Masayuki Orihashi

IPC: H04L27/28

CPC classification number: H04L5/0048 ,  H04B7/0413 ,  H04B2201/70701 ,  H04J13/18 ,  H04L5/0007 ,  H04L5/0023 ,  H04L25/0206 ,  H04L27/2613 ,  H04L27/2628 ,  H04L27/265 ,  H04L27/2657 ,  H04L2027/0024

Abstract: A MIMO-OFDM transmission apparatus is provided which allows high accuracy estimation of frequency offset, high accuracy estimation of a transmission path fluctuation and high accuracy synchronization/signal detection.Pilot symbol mapping (1111) is provided for forming pilot carriers by assigning orthogonal sequences to corresponding subcarriers among OFDM signals which are transmitted at the same time from respective antennas in the time domain.Even when pilot symbols are multiplexed among a plurality of channels (antennas), this allows frequency offset/phase noise to be estimated with high accuracy.

Abstract translation: 提供了MIMO-OFDM发送装置，其允许频率偏移的高精度估计，传输路径波动的高精度估计和高精度同步/信号检测。 提供导频符号映射（1111），用于通过在从时域中的各个天线同时发送的OFDM信号中分配正交序列到对应的子载波来形成导频载波。 即使在多个信道（天线）中复用导频符号的情况下，也能够高精度地估计频率偏移/相位噪声。

公开(公告)号：US20090054094A1

公开(公告)日：2009-02-26

申请号：US12258877

申请日：2008-10-27

Applicant: Alpaslan Demir ,  Donald M. Grieco ,  John W. Haim ,  Andrew F. Bednarz ,  Philip J. Pietraski ,  Louis J. Guccione ,  Prabhakar R. Chitrapu

Inventor： Alpaslan Demir ,  Donald M. Grieco ,  John W. Haim ,  Andrew F. Bednarz ,  Philip J. Pietraski ,  Louis J. Guccione ,  Prabhakar R. Chitrapu

IPC: H04B15/00

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70755 ,  H04B1/709 ,  H04B2201/70701 ,  H04W48/16 ,  H04W56/00

Abstract: A method and apparatus for identifying a code group representative of a predetermined number of base stations is disclosed. A chip offset within a frame is input into a first correlator. A plurality of samples of chips at which a primary synchronization code (PSC) has been detected are input into the first correlator. Output of the first correlator is multiplied by the complex conjugate of the PSC to obtain a magnitude for the signals being transmitted at the chips inputted into the first correlator. The magnitude is summed over four frames. The summed signals view of a predetermined set of decision variables is evaluated. A case number, a code group, a timeslot location, and a system frame number are determined based on the evaluation and noise estimation.

Abstract translation: 公开了一种用于识别表示预定数量的基站的代码组的方法和装置。 帧内的码片偏移被输入到第一相关器中。 已经检测到主同步码（PSC）的多个码片样本被输入到第一相关器中。 将第一相关器的输出乘以PSC的复共轭，以获得在输入​​到第一相关器的码片处发送的信号的幅度。 幅度总和在四帧以上。 评估预定的一组决策变量的相加信号视图。 基于评估和噪声估计来确定案例编号，代码组，时隙位置和系统帧编号。

公开(公告)号：US07493135B2

公开(公告)日：2009-02-17

申请号：US11097017

申请日：2005-03-31

Applicant: Bong-Hoe Kim ,  Dong-Youn Seo ,  Dong-Hee Shim

Inventor： Bong-Hoe Kim ,  Dong-Youn Seo ,  Dong-Hee Shim

IPC: H04B7/00

CPC classification number: H04J13/20 ,  H04B2201/70701 ,  H04J13/0044 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0656 ,  H04L1/1812

Abstract: Disclosed is a transmission method for a downlink control signal in a MIMO communication system where multiple transmit antennas and multiple receive antennas are used, in which each data transmitted from the multiple transmit antennas is transmitted with a different control signal through one downlink control signal transmission channel. The transmission method for a downlink control signal in a MIMO communication system efficiently transmits or receives data by transmitting control information such as a different modulation method and the number of OVSF codes of each transmit antenna to a mobile station. Also, a control channel is similar to that used in the conventional HSDPA system, thus allowing backward compatibility. Additionally, the transmission method can be applied not only for data transmitted to each antenna being composed of one packet but also for data transmitted to each antenna being composed of multiple packets.

Abstract translation: 公开了一种MIMO通信系统中的下行链路控制信号的发送方法，其中使用多个发射天线和多个接收天线，其中通过一个下行链路控制信号传输信道以不同的控制信号发送从多个发射天线发送的每个数据 。 MIMO通信系统中的下行链路控制信号的发送方法通过向移动台发送诸如不同调制方式的控制信息和每个发送天线的OVSF码的数量来有效地发送或接收数据。 此外，控制信道与常规HSDPA系统中使用的控制信道相似，因此允许向后兼容。 此外，传输方法不仅可以应用于发送到由一个分组组成的每个天线的数据，而且可以应用于发送到由多个分组组成的每个天线的数据。

公开(公告)号：US07483473B2

公开(公告)日：2009-01-27

申请号：US11103202

申请日：2005-04-11

Applicant: John E. Hoffmann ,  George Rodney Nelson, Jr. ,  James A. Proctor, Jr. ,  Antoine J. Rouphael

Inventor： John E. Hoffmann ,  George Rodney Nelson, Jr. ,  James A. Proctor, Jr. ,  Antoine J. Rouphael

IPC: H04L27/30

CPC classification number: H04L5/0046 ,  H04B1/707 ,  H04B2201/70701 ,  H04L7/041

Abstract: A technique for efficient implementation of pilot signals on a reverse link in a wireless communication system. An access channel is defined for the reverse link such that within each frame, or epoch, a portion is dedicated to sending only pilot symbols. Another portion of the frame is reserved for sending mostly data symbols; however, within this second portion of the frame, additional pilot symbols are interleaved among the data symbols. The pilot symbol or preamble portion of the access channel frame allows for efficient acquisition of the access signal at the base station, while providing a timing reference for determining the effects of multipath fading. In particular, a pilot correlation filter provides a phase estimate from the pilot symbols in the preamble portion, which is then used to decode the data symbols in the payload portion. An access acquisition portion of the receiver uses the phase estimates provided by the pilot correlation filter to process the output of a data symbol correlation filter. The additional pilot symbols embedded in the payload portion are used in a cross product operation to further resolve the effects of multipath fading.

Abstract translation: 一种在无线通信系统中在反向链路上有效实现导频信号的技术。 为反向链路定义了一个接入信道，使得在每个帧或时期内，一部分专用于仅发送导频符号。 帧的另一部分保留用于主要发送数据符号; 然而，在帧的该第二部分内，在数据符号之间交织附加的导频符号。 访问信道帧的导频符号或前导码部分允许在基站处有效地获取接入信号，同时提供用于确定多径衰落的影响的定时参考。 具体地，导频相关滤波器从前导码部分中的导频符号提供相位估计，然后该导频符号用于解码有效载荷部分中的数据符号。 接收机的访问获取部分使用由导频相关滤波器提供的相位估计来处理数据符号相关滤波器的输出。 嵌入在有效载荷部分中的附加导频符号用于交叉乘积运算，以进一步解决多路径衰落的影响。

公开(公告)号：US07474689B2

公开(公告)日：2009-01-06

申请号：US11865268

申请日：2007-10-01

Applicant: Ariela Zeira

Inventor： Ariela Zeira

IPC: H04B1/69 ,  H04B7/216

CPC classification number: H04L25/0228 ,  H04B1/7105 ,  H04B1/71052 ,  H04B2201/70701 ,  H04L25/0204 ,  H04L25/0206 ,  H04L25/0212 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/0246 ,  H04L25/025 ,  H04L25/03331

Abstract: A plurality of communication bursts are used to communicate data in a shared spectrum in a time slot of a time division duplex communication system. Each burst has an associated midamble sequence of a set of known sequences. A wireless communication apparatus has a receiver component configured to receive the plurality of communication bursts and to define a received vector corresponding to the received bursts. A channel estimator is provided that is configured to estimate channel information of the plurality of communication bursts by constructing a block matrix having a plurality of identical right circulant matrix blocks using the known midamble sequences and the received vector. A data detector then recovers data from the received communication bursts using the estimated wireless channel information.

Abstract translation: 多个通信突发用于在时分双工通信系统的时隙中在共享频谱中传送数据。 每个突发具有一组已知序列的相关联的中间码序列。 无线通信装置具有被配置为接收多个通信突发并且定义与所接收的突发相对应的接收向量的接收机组件。 提供了一种信道估计器，其被配置为通过使用已知的中继码序列和接收的矢量构造具有多个相同的右循环矩阵块的块矩阵来估计多个通信脉冲串的信道信息。 数据检测器然后使用估计的无线信道信息从接收到的通信脉冲串中恢复数据。