公开(公告)号：US20070273584A1

公开(公告)日：2007-11-29

申请号：US11833037

申请日：2007-08-02

Applicant: Takaaki Kisigami ,  Takashi Fukagawa ,  Yasuaki Yuda ,  Keiji Takakusaki ,  Shoji Miyamoto

Inventor： Takaaki Kisigami ,  Takashi Fukagawa ,  Yasuaki Yuda ,  Keiji Takakusaki ,  Shoji Miyamoto

IPC: G01S3/28

CPC classification number: H04B1/7113 ,  G01S3/74 ,  H04B1/7117 ,  H04B7/0617 ,  H04B7/086 ,  H04B2201/70701 ,  H04B2201/70715 ,  H04L1/06

Abstract: A receiver having an array antenna estimates arrival directions of multiple paths that arrive with an angular spread. Consequently, arrival direction estimation accuracy can be ensured without increasing throughput even if the power every path is low by estimating an average arrival direction of an entire set of multiple paths having the angular spread from a result of one angular spectrum by multiple correlation operation units that perform mutual correlation operations with pilot signals for baseband signals received by the array antenna, a path detection unit that detects multiple arrival path receiving timings by generating a delay profile based on output of each of the correlation operation units, a path correlation value synthesis unit that synthesizes a correlation operation value calculated in the multiple correlation operation units and an arrival direction estimation unit that collectively estimates multiple path arrival directions using output of the path correlation value synthesis unit.

Abstract translation: 具有阵列天线的接收机估计以角度扩展到达的多个路径的到达方向。 因此，即使通过多个相关运算单元从一个角度频谱的结果估计具有角度扩展的整个多个路径的整个组的平均到达方向，即使通过多个相关运算单元来估计每个路径的功率，也可以确保到达方向估计精度， 执行与阵列天线接收的基带信号的导频信号的相互关联操作;路径检测单元，通过基于每个相关运算单元的输出生成延迟分布来检测多个到达路径接收定时;路径相关值合成单元， 合成在多个相关运算单元中计算出的相关运算值和使用路径相关值合成单元的输出共同估计多个路径到达方向的到达方向估计单元。

公开(公告)号：US07298773B2

公开(公告)日：2007-11-20

申请号：US11030941

申请日：2005-01-07

Applicant: Yu-Suk Yun ,  Soon-Young Yoon ,  Hee-Won Kang ,  Jae-Heung Yeom ,  Sang-Hyun Yang ,  Hoon Huh

Inventor： Yu-Suk Yun ,  Soon-Young Yoon ,  Hee-Won Kang ,  Jae-Heung Yeom ,  Sang-Hyun Yang ,  Hoon Huh

IPC: H04L27/30

CPC classification number: H04W36/0055 ,  H04B1/707 ,  H04B7/264 ,  H04B2201/70701 ,  H04J13/004 ,  H04W48/08 ,  H04W48/12 ,  H04W52/322 ,  H04W52/325 ,  H04W88/08

Abstract: There is provided a method and apparatus for selecting an appropriate base station and an optimal data rate to provide a voice service and a data service based on a voice service load in a CDMA system. A base station transmits two pilot signals orthogonally spread with different orthogonal codes in association with its voice service load, and a mobile station estimates the voice service load based on a pilot power ratio.

Abstract translation: 提供了一种用于选择合适的基站和最佳数据速率以在CDMA系统中基于语音服务负载提供语音服务和数据服务的方法和装置。 基站与其语音业务负载相关联地发送与不同正交码正交扩展的两个导频信号，移动台基于导频功率比来估计语音业务负载。

公开(公告)号：US07292563B1

公开(公告)日：2007-11-06

申请号：US10009948

申请日：2000-06-19

Applicant: Stephen William Wales

Inventor： Stephen William Wales

IPC: H04B7/216

CPC classification number: H04J13/20 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04J13/0044

Abstract: A method of associating the Training code to a Channelisation code in a mobile telecommunications system. The method includes associating a Training code with a Channelisation code prior to transmission according to a set of rules such that upon detection of the Training code by a receiver, the Channelisation code is known.

Abstract translation: 将培训代码与移动电信系统中的信道化代码相关联的方法。 该方法包括根据一组规则将培训代码与传输代码相关联，使得在接收机检测到训练代码之后，信道化代码是已知的。

公开(公告)号：US07286506B2

公开(公告)日：2007-10-23

申请号：US10262044

申请日：2002-09-30

Applicant: Farrokh Abrishamkar ,  Kenneth Kreutz-Delgado

Inventor： Farrokh Abrishamkar ,  Kenneth Kreutz-Delgado

IPC: H04Q7/00

CPC classification number: H04B1/7101 ,  H04B2201/70701

Abstract: A system is disclosed for use in a wireless communication system to provide an estimated pilot signal. The system includes a receiver and a front-end processing and despreading component in electronic communication with the receiver for despreading a CDMA signal. A pilot estimation component is in electronic communication with the front-end processing and despreading component for estimating an original pilot signal using a Kalman filter to produce a pilot estimate. A demodulation component is in electronic communication with the pilot estimation component and the front-end processing and despreading component for providing demodulated data symbols. The Kalman filter is configured by an offline system identification process that calculates parameters using a prediction error method and a Gauss-Newton algorithm and generates state estimates using the Kalman filter. The calculating and generating are iteratively performed to train the Kalman filter for real-time operation.

Abstract translation: 公开了一种在无线通信系统中用于提供估计的导频信号的系统。 该系统包括接收机和与接收机进行电子通信的前端处理和解扩部件，用于解扩CDMA信号。 导频估计部件与前端处理和解扩部件进行电子通信，用于使用卡尔曼滤波器估计原始导频信号以产生导频估计。 解调部件与导频估计部件以及用于提供解调数据符号的前端处理和解扩部件进行电子通信。 卡尔曼滤波器由离线系统识别过程配置，该过程使用预测误差法和高斯 - 牛顿算法计算参数，并使用卡尔曼滤波器生成状态估计。 迭代执行计算和生成以训练卡尔曼滤波器进行实时操作。

公开(公告)号：US20070223566A1

公开(公告)日：2007-09-27

申请号：US11754984

申请日：2007-05-29

Applicant: Robbin Hughes ,  De-Gang Yao ,  Serguei Glazko

Inventor： Robbin Hughes ,  De-Gang Yao ,  Serguei Glazko

IPC: H04B1/00

CPC classification number: H04B1/70775 ,  H04B1/70751 ,  H04B1/70754 ,  H04B1/7115 ,  H04B2201/70701 ,  H04B2201/70702

Abstract: In a remote unit of a wireless communication system, the speed of acquisition, or reacquisition, of a pilot signal by a search engine is increased. PN space is divided into segments and a coarse search of each segment is performed using a set of “fast” search parameters. A set of peak signal strengths, along with their corresponding PN offsets, is saved for each segment of PN space. Following the search of all segments of PN space, the peak signal strengths which were saved during the coarse acquisition are evaluated. Coarse acquisition search results are used by the remote unit to determine fine search window parameters for subsequent searches performed by the remote unit search engine. The fine search parameters concentrate searching efforts on portions of PN space most likely to contain a viable base station pilot signal.

Abstract translation: 在无线通信系统的远程单元中，增加了搜索引擎的导频信号的获取或重新获取的速度。 PN空间被划分成段，并且使用一组“快速”搜索参数来执行每个段的粗略搜索。 为PN空间的每个段节省一组峰值信号强度及其相应的PN偏移。 在搜索PN空间的所有段之后，评估在粗略采集期间保存的峰值信号强度。 远程单元使用粗略采集搜索结果来确定由远程单元搜索引擎执行的后续搜索的精细搜索窗口参数。 精细搜索参数将搜索努力集中在最有可能包含可行基站导频信号的PN空间部分上。

公开(公告)号：US07272176B2

公开(公告)日：2007-09-18

申请号：US10368920

申请日：2003-02-18

Applicant: Yongbin Wei ,  Durga Prasad Malladi ,  Josef Blanz

Inventor： Yongbin Wei ,  Durga Prasad Malladi ,  Josef Blanz

IPC: H03H7/30

CPC classification number: H04B1/7105 ,  H04B2201/70701 ,  H04L25/0228 ,  H04L25/03044 ,  H04L2025/03509 ,  H04L2025/03522 ,  H04L2025/03598 ,  H04L2025/03617

Abstract: In a wireless communication system, a method for estimating a transmitted signal is disclosed. A wireless signal is received that includes a pilot channel and at least one other channel. A transmitted signal is estimated using an equalizer and the received wireless signal. The equalizer includes a filter with a plurality of taps that are adapted through use of an adaptive algorithm that uses an estimated pilot estimated from the received wireless signal. The pilot channel is transmitted in the wireless signal that included the at least one other channel. The estimated pilot is extracted and provided to the adaptive algorithm.

Abstract translation: 在无线通信系统中，公开了一种用于估计发送信号的方法。 接收包括导频信道和至少一个其它信道的无线信号。 使用均衡器和接收到的无线信号来估计发送信号。 均衡器包括具有多个抽头的滤波器，其通过使用自适应算法来适配，所述自适应算法使用从所接收的无线信号估计的估计导频。 在包括至少一个其他信道的无线信号中发送导频信道。 估计的导频被提取并提供给自适应算法。

公开(公告)号：US20070211790A1

公开(公告)日：2007-09-13

申请号：US11614470

申请日：2006-12-21

Applicant: Avneesh Agrawal ,  Edward Teague

Inventor： Avneesh Agrawal ,  Edward Teague

IPC: H04B1/00

CPC classification number: H04L27/2613 ,  H04B1/713 ,  H04B2201/70701 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0041 ,  H04L5/0051 ,  H04L25/0232 ,  H04L25/03866 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03509 ,  H04L2025/03789

Abstract: Techniques are provided to support fast frequency hopping with a code division multiplexed (CDM) pilot in a multi-carrier communication system (e.g., an OFDMA system). Each transmitter (e.g., each terminal) in the system transmits a wideband pilot on all subbands to allow a receiver (e.g., a base station) to estimate the entire channel response at the same time. The wideband pilot for each transmitter may be generated using direct sequence spread spectrum processing and based on a pseudo-random number (PN) code assigned to that transmitter. This allows the receiver to individually identify and recover multiple wideband pilots transmitted concurrently by multiple transmitters. For a time division multiplexed (TDM)/CDM pilot transmission scheme, each transmitter transmits the wideband pilot in bursts. For a continuous CDM pilot transmission scheme, each transmitter continuously transmits the wideband pilot, albeit at a low transmit power level. Any frequency hopping rate may be supported without impacting pilot overhead.

Abstract translation: 提供技术以在多载波通信系统（例如，OFDMA系统）中用码分多路复用（CDM）导频来支持快速跳频。 系统中的每个发射机（例如，每个终端）在所有子带上发送宽带导频，以允许接收机（例如，基站）同时估计整个信道响应。 可以使用直接序列扩频处理并基于分配给该发射机的伪随机数（PN）码来生成每个发射机的宽带导频。 这允许接收机单独地识别和恢复由多个发射机同时传输的多个宽带导频。 对于时分复用（TDM）/ CDM导频传输方案，每个发射机以突发方式发送宽带导频。 对于连续的CDM导频传输方案，每个发射机连续发射宽带导频，尽管传输功率水平较低。 可以支持任何跳频率，而不会影响导频开销。

公开(公告)号：US07251268B2

公开(公告)日：2007-07-31

申请号：US10003065

申请日：2001-11-02

Applicant: Danish Ali

Inventor： Danish Ali

IPC: H04B1/00 ,  H04L27/06

CPC classification number: H04J13/10 ,  H04B1/7117 ,  H04B2201/70701

Abstract: A Rake receiver suitable for receiving, for example, direct sequence CDMA signals, in which the pilot code used to correlate the received signal in each Rake finger (RF1, RF2, RFN) is interpolated prior to the correlation.

Abstract translation: 适用于接收例如直接序列CDMA信号的耙式接收机，其中用于将每个耙指（RF 1，RF 2，RFN）中的接收信号相关联的导频码在相关之前进行内插。

公开(公告)号：US20070160118A1

公开(公告)日：2007-07-12

申请号：US11652377

申请日：2007-01-10

Applicant: Gilles Charbit

Inventor： Gilles Charbit

IPC: H04B1/00 ,  H04K1/10

CPC classification number: H04J11/00 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J13/00 ,  H04J13/0022 ,  H04L25/0226 ,  H04L27/261 ,  H04L27/2613

Abstract: The specification and drawings present a new method, system, apparatus and software product for pilot scrambling using a scrambling code (e.g., pseudo-noise code such as a Gold code, a Kasami code, a Hadamard code, m-sequences, etc.) in communication systems, e.g., for wireless communications. The sector/cell specific scrambling codes are mapped to the multiple pilot symbols within, e.g., an SCH (synchronization channel) repetition period. This improves receiver performance on a sector edge and/or a cell edge in, e.g., tight-frequency re-use applications.

Abstract translation: 说明书和附图提出了使用扰码（例如，诸如金码，卡萨米码，哈达马码，m序列等的伪噪声码）的导频加扰的新方法，系统，装置和软件产品， 在通信系统中，例如用于无线通信。 扇区/小区特定扰码被映射到例如SCH（同步信道）重复周期内的多个导频符号。 这改进了例如紧密频率重用应用中的扇区边缘和/或小区边缘处的接收机性能。

公开(公告)号：US07236796B2

公开(公告)日：2007-06-26

申请号：US10353303

申请日：2003-01-28

Applicant: Samir S. Soliman

Inventor： Samir S. Soliman

IPC: H04Q7/20

CPC classification number: H04W48/16 ,  H04B1/70754 ,  H04B1/7115 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04L27/0012 ,  H04W12/10 ,  H04W64/00

Abstract: A method and apparatus for conducting a pilot signal search in a wireless communications network. The location of a mobile is determined within the network. This location is then used in determining search window sizes and other search parameter information that is used to search all pilot signals identified in a designated pilot signal set. Search window size is also determined based upon the location of the mobile and another component related to multipath effects for a transmitted pilot signal.

Abstract translation: 一种用于在无线通信网络中进行导频信号搜索的方法和装置。 在网络内确定移动的位置。 然后将该位置用于确定搜索窗口大小和用于搜索在指定的导频信号集中识别的所有导频信号的其他搜索参数信息。 搜索窗口大小也根据移动台的位置以及与发射导频信号的多路径效应有关的另一个分量来确定。