公开(公告)号：US08331309B2

公开(公告)日：2012-12-11

申请号：US12400618

申请日：2009-03-09

Applicant: Gene Marsh ,  Srikanth Gummadi ,  William Burchill ,  Michael Wengler

Inventor： Gene Marsh ,  Srikanth Gummadi ,  William Burchill ,  Michael Wengler

IPC: H04W4/00

CPC classification number: H04W72/042 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J11/0069 ,  H04W4/00 ,  H04W72/082

Abstract: A configuration for downlink signals in a wireless communication system, methods of configuring the downlink signals, apparatus for generating the downlink signals, and apparatus for receiving and processing the downlink signals are described herein. Downlink signals in a wireless communication system are reconfigured in series of frames, with each frame carrying a preamble that provides fast cell search and system acquisition. In particular, the preamble includes a primary preamble and a secondary preamble, where the primary preamble is common to all sectors in a base station and all base stations in a system and the secondary preamble is effectively unique to each base station, and may be further distinguished based on a sector basis. In addition, pilot signals are aligned with base stations to occur at the same time within a frame and the PN sequence values of the pilot signals are based on a cell identification an antenna identification, thereby enabling prediction of pilots transmitted by interferers or neighboring base stations from acquisition of secondary preambles. Also, the pilot bits are selectively assigned from a center of an operating band outward. Due to the pilot placement and pilot modulation, the scheme enables interference mitigation and channel estimation without knowing the frequency bandwidth, which is especially advantageous in broadcast channel systems.

Abstract translation: 这里描述了无线通信系统中的下行链路信号的配置，配置下行链路信号的方法，用于生成下行链路信号的装置，以及用于接收和处理下行链路信号的装置。 在无线通信系统中的下行链路信号被重新配置为一系列帧，每个帧携带提供快速小区搜索和系统获取的前同步码。 具体地，前导码包括主前同步码和次前导码，其中主前同步码对于基站中的所有扇区和系统中的所有基站是公共的，并且次前导码对于每个基站是有效唯一的，并且可以进一步 区分基于行业基础。 此外，导频信号与基站对准，在帧内同时发生，导频信号的PN序列值基于小区识别天线识别，从而能够预测由干扰源或相邻基站发射的导频 从获得二级前导码。 此外，从操作频带的中心向外选择性地分配导频比特。 由于导频放置和导频调制，该方案能够在不知道频带宽度的情况下实现干扰减轻和信道估计，这在广播信道系统中特别有利。

公开(公告)号：US08311080B2

公开(公告)日：2012-11-13

申请号：US12225705

申请日：2007-03-27

Applicant: Kazunori Sato

Inventor： Kazunori Sato

IPC: H04B1/00

CPC classification number: H04B1/70755 ,  H04B2201/70701 ,  H04B2201/70709

Abstract: Disclosed is a mobile communication terminal employing a code division multiple access scheme, in which when it is decided that the common channel level is equal to or higher than a third threshold (common channel level threshold), an RLF decision control unit compares the SIR data with a first threshold and a second threshold to decide in sync state/out-of sync state between the local spread code and the reception spread code and outputs the decision signal. When it is decided that the common channel level is lower than the third threshold, the first threshold and the second threshold are set to the same value. In this state, when it is decided that the level of the SIR data is lower than the first threshold (=second threshold), the decision signal corresponding to an out-of sync state is output immediately after a predetermined delay time elapses, thereby reducing the power dissipation.

Abstract translation: 公开了采用码分多址方式的移动通信终端，其中当确定公共信道电平等于或高于第三阈值（公共信道电平阈值）时，RLF判定控制单元将SIR数据 具有第一阈值和第二阈值，以决定本地扩展码和接收扩展码之间的同步状态/不同步状态，并输出判定信号。 当确定公共信道级别低于第三阈值时，将第一阈值和第二阈值设置为相同的值。 在这种状态下，当判定SIR数据的电平低于第一阈值（=第二阈值）时，在经过预定的延迟时间之后立即输出对应于不同步状态的判定信号，从而减少 功耗。

公开(公告)号：US20120195360A1

公开(公告)日：2012-08-02

申请号：US13314787

申请日：2011-12-08

Applicant: Anand P. Narayan ,  Greg Graham ,  David R. Meyer ,  Prashant Jain

Inventor： Anand P. Narayan ,  Greg Graham ,  David R. Meyer ,  Prashant Jain

IPC: H04B15/00 ,  H04L27/01

CPC classification number: H04B1/7097 ,  G01S5/0215 ,  G01S5/10 ,  G01S19/22 ,  H04B1/7093 ,  H04B1/7105 ,  H04B1/7117 ,  H04B2001/70935 ,  H04B2201/70701 ,  H04B2201/70715

Abstract: An interference cancelling receiver combines data from multiple paths after aligning to transmitter timing, and uses either an equalizer or a Rake receiver to compute symbol estimates. Interference estimates are generated from the symbol estimates, and multiple interference estimates are combined after re-aligning the interference estimates to receiver timing. At least two segments of symbol estimates are computed for each segment of interference cancelled data.Various techniques may be employed for controlling the latency and sequencing of these operations, and the subsystems within the canceller may use different processing clock speeds.

Abstract translation: 干扰消除接收机在对准发射机定时之后组合来自多个路径的数据，并且使用均衡器或Rake接收机来计算符号估计。 从符号估计产生干扰估计，并且在将干扰估计重新对准接收机定时之后组合多个干扰估计。 对干扰消除数据的每个段计算符号估计的至少两个段。 可以采用各种技术来控制这些操作的等待时间和顺序，并且消除器内的子系统可以使用不同的处理时钟速度。

公开(公告)号：US08223826B2

公开(公告)日：2012-07-17

申请号：US12944587

申请日：2010-11-11

Applicant: Djordje Tujkovic ,  Ying Xia ,  Robert Lorenz ,  Sriram Mudulodu

Inventor： Djordje Tujkovic ,  Ying Xia ,  Robert Lorenz ,  Sriram Mudulodu

IPC: H04B3/46 ,  H04B17/00 ,  H04Q1/20

CPC classification number: H04B17/345 ,  H04B17/26 ,  H04B2201/70701 ,  H04L25/0224 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: Embodiments are directed to a wireless receiver system that utilizes a special structure of pilot symbols used for synchronization and channel estimation in transmission packets to measure noise power at the receiver. The periodicity of the pilot signal sequences is used to extract the noise power from the received signal. Such extraction is achieved by subtracting the received signals from two pilot slots which are separated by the known periodicity of the training sequence. This method relies on the fact that desired signal and system interference signals will cancel out after the subtraction process. Measuring the power of the residual signal after subtraction represents the estimate of the noise power. Several consecutive such residual signals can be first summed up before measuring the power to improve the estimate of the noise power at the receiver. To further improve the performance, estimates of the desired signal produced by a channel estimation block can be first subtracted from each of the received signals on two pilot slots which are then to be subtracted and are separated by the known periodicity of the pilot sequence.

Abstract translation: 实施例涉及一种无线接收机系统，其利用用于传输分组中的同步和信道估计的导频符号的特殊结构来测量接收机处的噪声功率。 导频信号序列的周期性用于从接收信号中提取噪声功率。 通过从由训练序列的已知周期分隔的两个导频时隙中减去接收到的信号来实现这种提取。 该方法依赖于在减法处理之后所期望的信号和系统干扰信号将被抵消的事实。 减去后测量残留信号的功率表示噪声功率的估计。 在测量功率之前可以首先总结几个连续的这样的残余信号，以改善接收机噪声功率的估计。 为了进一步提高性能，可以首先从两个导频时隙上的每个接收信号中减去由信道估计块产生的期望信号的估计值，然后被减去并且被导频序列的已知周期分隔。

公开(公告)号：US20120155574A1

公开(公告)日：2012-06-21

申请号：US13403369

申请日：2012-02-23

Applicant: Douglas Cairns ,  Elias Jonsson

Inventor： Douglas Cairns ,  Elias Jonsson

IPC: H04L27/06 ,  H03D1/24

CPC classification number: H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

Abstract: A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16 QAM or 64 QAM. The receiver knows the modulation type and location (time/frequency/code) of the soft pilot symbols, and demodulates them first. The receiver uses the demodulated soft pilot symbols as known symbols to estimate parameters of the received radio signal. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols.

Abstract translation: 一种用于在利用软导频符号的数字通信系统中接收和处理发送符号序列的接收机和方法。 通过用诸如BPSK或QPSK之类的较低阶调制来调制软导频符号，同时以诸如16QAM或64等更高阶调制调制剩余符号，发送一组软导频符号比该序列中的剩余符号更高的可靠性。 QAM。 接收机知道软导频符号的调制类型和位置（时间/频率/码），并首先解调它们。 接收机使用解调的软导频符号作为已知符号来估计所接收的无线电信号的参数。 与传统的固定飞行员不同，软飞行员仍然携带一些数据。 此外，软导频器在建立解调高阶调制符号时必不可少的幅度参考是特别有用的。

公开(公告)号：US20120127884A1

公开(公告)日：2012-05-24

申请号：US13361301

申请日：2012-01-30

Applicant: Kiran K. Vanganuru ,  Gregory S. Sternberg ,  William E. Lawton

Inventor： Kiran K. Vanganuru ,  Gregory S. Sternberg ,  William E. Lawton

IPC: H04W24/00

CPC classification number: H04B1/707 ,  H04B2201/70701

Abstract: A method and apparatus for estimating a signal-to-interference ratio (SIR) are disclosed. A received signal includes signal energy on multiple basis functions. Desired signal energy in the received signal is transformed onto a first basis function with constant polarity. The desired signal energy is estimated by coherently averaging signal energy on the first basis function. A noise power is estimated by averaging signal energy on each basis function other than the first basis function and accumulating the averaged signal energy from the basis function other than the first basis function and scaling the accumulated signal energy to account for a noise estimate from the first basis function. An SIR is estimated by dividing the desired signal energy by the noise power.

Abstract translation: 公开了一种用于估计信号干扰比（SIR）的方法和装置。 接收到的信号包括多个基本功能的信号能量。 接收信号中的期望信号能量被变换为具有恒定极性的第一基函数。 通过在第一基函数上相干平均信号能量来估计期望的信号能量。 通过对除了第一基函数之外的每个基函数平均信号能量来估计噪声功率，并且累积来自除第一基函数之外的基函数的平均信号能量，并且对累积的信号能量进行缩放以考虑来自第一基函数的噪声估计 基函数。 通过将期望的信号能量除以噪声功率来估计SIR。

公开(公告)号：US20120106671A1

公开(公告)日：2012-05-03

申请号：US13141070

申请日：2008-12-19

Applicant: Thomas Chapman ,  Terence Edwin Dodgson ,  Volker Franz ,  Malgorzata Wimmer

Inventor： Thomas Chapman ,  Terence Edwin Dodgson ,  Volker Franz ,  Malgorzata Wimmer

IPC: H04B1/02

CPC classification number: H04W52/42 ,  H04B7/0404 ,  H04B7/0602 ,  H04B7/0604 ,  H04B7/0608 ,  H04B2201/70701 ,  H04B2201/709709 ,  H04J13/00 ,  H04W28/22 ,  H04W48/08 ,  H04W52/12 ,  H04W52/146 ,  H04W88/02

Abstract: Two power control loops for antenna switching transmit diversity are realized by a user terminal including two antennas (110, 120), one power amplifier (140) for amplifying the signals to be transmitted from each of the antennas, and a switch (130) switching the transmission power of the power amplifier from one antenna to the other antenna. Accordingly, the user terminal is enabled to alternately transmit data packets, with its two antennas. A closed loop power control mechanism in the user terminal is adapted to update, on receipt of a transmission power control command from a base station, the transmission power relative to the level of two slots previously.

Abstract translation: 用于天线切换发射分集的两个功率控制回路由包括两个天线（110,120）的用户终端，用于放大要从每个天线发射的信号的一个功率放大器（140）以及开关（130）切换 功率放大器从一个天线到另一个天线的发射功率。 因此，用户终端能够与其两个天线交替地发送数据分组。 用户终端中的闭环功率控制机构适于在从基站接收到发射功率控制命令时相对于先前的两个时隙的级别更新发射功率。

公开(公告)号：US08150405B2

公开(公告)日：2012-04-03

申请号：US13172568

申请日：2011-06-29

Applicant: Masayuki Hoshino ,  Hiroki Haga

Inventor： Masayuki Hoshino ,  Hiroki Haga

IPC: H04W72/00 ,  H04W4/00

CPC classification number: H04W24/08 ,  H04B2201/70701 ,  H04L1/0017 ,  H04L1/0026 ,  H04L5/0037 ,  H04L5/0064 ,  H04L5/0082 ,  H04L25/0224 ,  H04L27/2608 ,  H04W24/10 ,  H04W72/0406

Abstract: A communication device which can reduce amount of control information, limit interference with other traffics, and prevent an increase in current consumption. In this device, a separation unit (105) separates radio resource allocation information, specific section information and transmission parameter information from a received signal. A specific section information control unit (106) selects a sub-carrier designated by the specific section information to allocate data to be transmitted to the own unit. A channel quality measuring unit (107) uses a pilot signal to measure the channel quality of the selected sub-carrier. A channel quality information creating unit (108) creates channel quality information indicating the measurement results input from the channel quality measuring unit (107). A multiplexing unit (109) multiplexes the transmission signal with the channel quality information.

Abstract translation: 可以减少控制信息量，限制与其他业务的干扰，防止电流消耗增加的通信装置。 在该装置中，分离部（105）从接收信号中分离无线资源分配信息，特定部分信息和发送参数信息。 特定区段信息控制单元（106）选择由特定区段信息指定的子载波来分配要发送到本身单元的数据。 信道质量测量单元（107）使用导频信号来测量所选择的子载波的信道质量。 信道质量信息创建单元（108）创建指示从信道质量测量单元（107）输入的测量结果的信道质量信息。 复用单元（109）将发送信号与信道质量信息进行复用。

公开(公告)号：US08130730B2

公开(公告)日：2012-03-06

申请号：US12499918

申请日：2009-07-09

Applicant: Nadir Sezgin ,  Fatih Ozluturk

Inventor： Nadir Sezgin ,  Fatih Ozluturk

IPC: H04B7/216

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70752 ,  H04B1/7093 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04L27/2053 ,  H04W56/00 ,  H04W74/04 ,  H04W88/08

Abstract: A time division duplex (TDD) user equipment (UE) is configured to synchronize to a TDD base station. The UE includes an antenna, a primary synchronization code matched filter, a first plurality of secondary synchronization code matched filters, a second plurality of secondary synchronization code matched filters, and a processor in communication with the first and second plurality of secondary synchronization code matched filters. The first plurality of secondary synchronization code matched filters determines secondary synchronization codes sent on a first carrier and the second plurality of secondary synchronization code matched filters determines secondary synchronization codes sent on a second carrier. The processor is configured to determine a code group assignment and selected timeslot based upon an analysis of the secondary synchronization codes sent on the first and second carriers.

Abstract translation: 时分双工（TDD）用户设备（UE）被配置为与TDD基站同步。 UE包括天线，主同步码匹配滤波器，第一多个次同步码匹配滤波器，第二多个次同步码匹配滤波器，以及与第一和第二多个次同步码匹配滤波器通信的处理器 。 第一多个次同步码匹配滤波器确定在第一载波上发送的次同步码，并且第二多个次同步码匹配滤波器确定在第二载波上发送的辅同步码。 处理器被配置为基于在第一和第二载波上发送的辅助同步码的分析来确定码组分配和选择的时隙。

公开(公告)号：US08107549B2

公开(公告)日：2012-01-31

申请号：US11564261

申请日：2006-11-28

Applicant: Christoph Arnold Joetten ,  George Jongren ,  Ivan Jesus Fernandez-Corbaton

Inventor： Christoph Arnold Joetten ,  George Jongren ,  Ivan Jesus Fernandez-Corbaton

IPC: H04B7/02

CPC classification number: H04L25/03019 ,  H04B1/71057 ,  H04B1/7117 ,  H04B1/712 ,  H04B2201/70701 ,  H04L5/023 ,  H04L25/0226 ,  H04L27/2647 ,  H04L2025/03426

Abstract: Techniques for receiving a MIMO transmission are described. A receiver processes received data from multiple receive antennas in multiple stages. A first stage performs front-end filtering/equalization on the received data with a front-end filter to process non on-time signal components in the multiple received signals. A second stage processes the filtered data with one or more combiner matrices to combine on-time signal components for multiple transmitted signals. For a MIMO-CDM transmission, a single front-end filter may be used for all channelization codes, and a different combiner matrix may be used for each channelization code. Partitioning the receiver processing into multiple stages simplifies derivation of the front-end filter and combiner matrices while achieving good performance. The front-end filter and combiner matrices may be updated separately at the same or different rates.

Abstract translation: 描述了用于接收MIMO传输的技术。 接收机以多个阶段处理来自多个接收天线的接收数据。 第一级利用前端滤波器对接收到的数据执行前端滤波/均衡，以处理多个接收信号中的非接通时间信号分量。 第二级利用一个或多个组合器矩阵处理滤波后的数据以组合多个发射信号的准时信号分量。 对于MIMO-CDM传输，单个前端滤波器可以用于所有信道化码，并且可以对每个信道化码使用不同的组合器矩阵。 将接收机处理分为多个阶段，简化了前端滤波器和组合器矩阵的推导，同时实现了良好的性能。 前端滤波器和组合器矩阵可以以相同或不同的速率单独更新。