公开(公告)号：US20120064848A1

公开(公告)日：2012-03-15

申请号：US13125625

申请日：2010-09-15

申请人： Neil McGowan ,  Marthinus Willem Da Silveira ,  Peter Zahariev Rashev

发明人： Neil McGowan ,  Marthinus Willem Da Silveira ,  Peter Zahariev Rashev

IPC分类号： H04B1/04 ,  H03L5/02

CPC分类号： H04L27/2623

摘要： Peak power reduction in transmit chains of radiocommunication devices is performed using a low sample rate. Filtering and, optionally, interpolation of a signal being processed for peak power reduction can be performed only in an error signal path or in both an error signal path and a primary signal path.

摘要翻译： 无线电通信设备的发射链中的峰值功率降低使用低采样率来执行。 只能在误差信号路径中或在误差信号路径和主信号路径两者中进行正在处理的用于峰值功率降低的信号的滤波和可选的内插。

公开(公告)号：US20100278288A1

公开(公告)日：2010-11-04

申请号：US12747407

申请日：2008-12-11

申请人： John P. Panicker ,  Gary D. Boudreau ,  Neil McGowan ,  Vish Nandlall

发明人： John P. Panicker ,  Gary D. Boudreau ,  Neil McGowan ,  Vish Nandlall

IPC分类号： H04L27/00

CPC分类号： H04L25/0236 ,  H04L1/0001 ,  H04L1/004 ,  H04L1/0618 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/006 ,  H04L25/0206 ,  H04L25/0244 ,  H04L25/025 ,  H04L27/0008 ,  H04L27/2657

摘要： A method and system for wireless communication channel estimation. A frequency offset hypothesis is determined. An interchannel interference (“ICI”) matrix based on the frequency offset hypothesis is generated. Pilot channel estimates based on the ICI matrix are obtained. A correlation error of the pilot channel estimates to the frequency offset hypothesis is calculated. The correlation error is compared with a predetermined correlation error value. The frequency offset hypothesis is updated and the aforementioned steps are iteratively repeated if the correlation error is greater than the predetermined correlation error value. The pilot channel estimates are used to estimate the wireless communication channel.

摘要翻译： 一种用于无线通信信道估计的方法和系统。 确定频率偏移假设。 产生基于频率偏移假设的信道间干扰（“ICI”）矩阵。 获得基于ICI矩阵的导频信道估计。 计算导频信道估计与频率偏移假设的相关误差。 将相关误差与预定的相关误差值进行比较。 更新频率偏移假设，并且如果相关误差大于预定的相关误差值，则迭代地重复上述步骤。 导频信道估计用于估计无线通信信道。

公开(公告)号：US20080096543A1

公开(公告)日：2008-04-24

申请号：US11572434

申请日：2005-07-19

申请人： Ganesh Sundararajan ,  Edward Ken Kiu Mah ,  Neil McGowan

发明人： Ganesh Sundararajan ,  Edward Ken Kiu Mah ,  Neil McGowan

IPC分类号： H04Q7/34

CPC分类号： H04W24/00

摘要： An access probe existing and generated within a base station to simulate a mobile terminal for the purpose of testing base station receive functionality within a communications system. The access probe data is injected at baseband rather than at RF to eliminate the need for analog/RF circuitry. The access probe performs injection at the front end of the base station receiver to exercise as much receive data path as possible. A unique ID is embedded in the access probes so that the communications system is aware which probes within a sequence were received successfully and at what power level. Within in-field applications, the unique ID allows the communications system to distinguish simulated access probes from those corresponding to real mobiles.

摘要翻译： 存在并在基站内生成的接入探针以模拟移动终端，以便测试基站在通信系统内接收功能。 接入探头数据在基带而不是射频注入，以消除对模拟/射频电路的需要。 接入探测器在基站接收机的前端执行注入以尽可能多的接收数据路径。 访问探针中嵌入了唯一的ID，以便通信系统知道序列中的哪些探针成功接收并以什么功率级别接收。 在现场应用中，唯一的ID允许通信系统将模拟的接入探针与对应于真实移动台的接入探头区分开。

公开(公告)号：US20070076678A1

公开(公告)日：2007-04-05

申请号：US11580024

申请日：2006-10-13

申请人： Xixian Chen ,  Neil McGowan ,  Muhammad Islam ,  Ning Guo ,  Hong Ren ,  Litong Li

发明人： Xixian Chen ,  Neil McGowan ,  Muhammad Islam ,  Ning Guo ,  Hong Ren ,  Litong Li

IPC分类号： H04B7/216

CPC分类号： H04W72/1289 ,  H04B1/7073 ,  H04B7/2618 ,  H04B7/2637 ,  H04B2201/70703 ,  H04J13/0048 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0014 ,  H04L1/0025 ,  H04L1/0029 ,  H04L1/0046 ,  H04L1/0068 ,  H04L1/0072 ,  H04L1/0073 ,  H04L1/08 ,  H04L1/1607 ,  H04L1/1809 ,  H04L2001/125 ,  H04W28/04 ,  H04W48/08 ,  H04W48/16 ,  H04W52/58 ,  H04W72/12 ,  H04W74/00 ,  H04W74/04

摘要： A forward link design is provided employing CDMA (code division multiple access) technologies in which time division multiplexing is employed between data and control information on the forward link to service multiple users per slot. Another forward link design employing CDMA (code division multiple access) technologies is provided in which code division multiplexing between data and control information is employed on the forward link to service multiple users per slot, which is preferably backwards compatible with legacy standards such as IS2000A. A reverse link design is also provided.

摘要翻译： 提供了使用CDMA（码分多址）技术的前向链路设计，其中在前向链路上的数据和控制信息之间采用时分多路复用来为每个时隙服务多个用户。 提供了采用CDMA（码分多址）技术的另一个前向链路设计，其中在前向链路上采用数据和控制信息之间的码分复用来为每个时隙服务多个用户，其优选地与诸如IS2000A的传统标准向后兼容。 还提供了反向链路设计。

公开(公告)号：US06577616B1

公开(公告)日：2003-06-10

申请号：US09473712

申请日：1999-12-29

申请人： Shahid Rasul Chaudry ,  Muhammad Khaledul Islam ,  Hong Ren ,  Azeem Ahmad ,  Thomas Leonard Trevor Plestid ,  Neil McGowan ,  James Russell Weisert ,  Brian Douglas Troup ,  David Andrew Tetreau ,  David Allan Boettger

发明人： Shahid Rasul Chaudry ,  Muhammad Khaledul Islam ,  Hong Ren ,  Azeem Ahmad ,  Thomas Leonard Trevor Plestid ,  Neil McGowan ,  James Russell Weisert ,  Brian Douglas Troup ,  David Andrew Tetreau ,  David Allan Boettger

IPC分类号： H04B7216

CPC分类号： H04B1/7075 ,  H04B7/2628 ,  H04B2201/70702 ,  H04W24/00 ,  H04W74/00 ,  H04W76/10

摘要： Methods and apparatuses are provided for CDMA (code division multiple access) access availability to a large cell area, and for traffic channel establishment. A group of cell site modems are configured to look for access attempts generated in respective complete and/or sectorized circular or annular shaped areas centered at the center of the cell area, the areas collectively covering the cell area. To achieve this, each cell site modem has a local clock and the local clock within the first of the cell site modems is synchronized with a standard network time, and the local clock of each of the subsequent cell site modems is offset by a respective delay with respect to the standard network time which causes the cell site modem to search within its respective annular shaped area. A cell site modem is also made available as a traffic cell site modem and is operable to have its traffic acquisition search window centered at a location of an access attempt. Alternatively, a plurality of traffic cell site modems may be provided, each having dedicated circular or annular coverage areas within the cell. The traffic cell site modems also preferably have a local clock which may be synchronized, either to a standard network time, or to a respective delay which causes it to search in its respective area. Methods and for handing off between circular and annular shaped traffic coverage areas are also provided.

摘要翻译： 为大容量区域的CDMA（码分多址）访问可用性和业务信道建立提供了方法和装置。 一组小区站点调制解调器被配置为寻找在以小区区域的中心为中心的各个完整和/或分区的圆形或环形区域中产生的访问尝试，区域集中地覆盖小区区域。 为了实现这一点，每个小区站点调制解调器具有本地时钟，并且第一小区站点调制解调器内的本地时钟与标准网络时间同步，并且后续小区站点调制解调器中的每一个的本地时钟被相应的延迟 相对于导致小区现场调制解调器在其各自的环形区域内搜索的标准网络时间。 小区站点调制解调器还可作为业务小区站点调制解调器使用，并且可操作以使其业务获取搜索窗口以访问尝试的位置为中心。 或者，可以提供多个业务小区站点调制解调器，每个业务小区站点调制解调器在小区内具有专用的圆形或环形覆盖区域。 业务小区站点调制解调器还优选地具有可以与标准网络时间同步的本地时钟，或者使得其在其相应区域中搜索的相应延迟。 还提供了在圆形和环形交通覆盖区域之间切断的方法。

公开(公告)号：US06553230B1

公开(公告)日：2003-04-22

申请号：US09292662

申请日：1999-04-16

申请人： Trevor T. Plestid ,  Azeem Ahmad ,  Michael S. Crowe ,  Sarvesh R. Sharma ,  Shahid R. Chaudry ,  Neil McGowan

发明人： Trevor T. Plestid ,  Azeem Ahmad ,  Michael S. Crowe ,  Sarvesh R. Sharma ,  Shahid R. Chaudry ,  Neil McGowan

IPC分类号： H04Q720

CPC分类号： H04W48/10 ,  H04W36/18 ,  H04W56/00

摘要： A method for allowing a mobile station to find a code transmitted by a base station which has a propagation delay to the mobile station which is much larger or smaller than a propagation delay between the mobile station and a base station from which it derived a time reference is provided. In the context of IS-95, a PN offset is sent to the mobile station to identify which target base station pilot signals to search for. By sending a virtual PN offset which differs from the real PN offset, the mobile station can find the target base station signals where normally they would fall outside the mobile station's search window.

摘要翻译： 一种用于允许移动台找到由移动台传播延迟的基站发送的代码，该移动台远远大于或小于移动站与基站之间的传播延迟，从该基站导出时间基准 被提供。 在IS-95的上下文中，向移动台发送PN偏移，以识别要搜索的哪个目标基站导频信号。 通过发送与实际PN偏移不同的虚拟PN偏移，移动台可以找到目标基站信号，正常情况下它们将落在移动台的搜索窗口之外。

公开(公告)号：US06304561B1

公开(公告)日：2001-10-16

申请号：US08996996

申请日：1997-12-23

申请人： Xin Jin ,  Hong-Kui Yang ,  John Nielsen ,  Neil McGowan ,  Jeff Stanier

发明人： Xin Jin ,  Hong-Kui Yang ,  John Nielsen ,  Neil McGowan ,  Jeff Stanier

IPC分类号： H04B7216

CPC分类号： H04B1/707

摘要： The present invention relates to a method for effecting regulation of the effective noise figure of a CDMA (Code Division Multiple Access) receiver. The regulation process can be used to control the receiver during the activation/deactivation of a cell/sector in a CDMA wireless system and during normal operation when the service area of the cell/sector needs to enlarge or shrink. In a most preferred embodiment the CDMA receiver includes a source of pseudo-random noise that is injected in the received signal, downstream of the signal digitization stage. A power detector measures the power in the received digitized signal and a program logic determines the amount of noise figure degradation to be applied. The actual noise power regulation is effected by multiplying the output of the noise generator by a weighing factor. In a multi-channel CDMA system, each channel is provided with an independent system to regulate the effective noise power figure degradation, thus allowing to effect a noise figure regulation on a channel by channel basis.

公开(公告)号：US09025575B2

公开(公告)日：2015-05-05

申请号：US13677781

申请日：2012-11-15

申请人： Neil McGowan ,  Marthinus Willem Da Silveira ,  Tan Ho

发明人： Neil McGowan ,  Marthinus Willem Da Silveira ,  Tan Ho

IPC分类号： H04W72/04 ,  H04W72/08 ,  H04L25/03 ,  H04B7/06

CPC分类号： H04W72/082 ,  H04B7/06 ,  H04B17/12 ,  H04L25/03949 ,  H04W72/044 ,  H04W72/0446 ,  H04W88/08

摘要： An antenna array of a base station is calibrated using outbound traffic signals. The antenna array includes a number of sub-arrays. A combiner in the antenna array combines the outbound traffic signals in the sub-arrays into a feedback signal. The outbound traffic signals are captured simultaneously for use as reference signals before the outbound traffic signals enter transmit paths in a radio unit of the base station. Each of the reference signals is one of the outbound traffic signals that is to be transmitted via one of the sub-arrays. An impairment estimator of the base station estimates the impairment for each of the outbound traffic signals based on the feedback signal and the reference signals. An approximate inverse of the impairment estimation is applied to the outbound traffic signals by a number of equalizers before the outbound traffic signals enter the transmit paths.

摘要翻译： 使用出站交通信号对基站的天线阵列进行校准。 天线阵列包括多个子阵列。 天线阵列中的组合器将子阵列中的出站业务信号组合成反馈信号。 在出站业务信号在基站的无线电单元中进入发送路径之前，同时捕获出站业务信号用作参考信号。 每个参考信号是要经由子阵列中的一个发送的出站业务信号之一。 基站的减值估计器基于反馈信号和参考信号来估计每个出站交通信号的损害。 在出站交通信号进入发送路径之前，通过多个均衡器将损害估计的近似逆向应用于出站交通信号。

公开(公告)号：US08817900B2

公开(公告)日：2014-08-26

申请号：US13443398

申请日：2012-04-10

申请人： Neil McGowan ,  Marthinus Willem Da Silveira

发明人： Neil McGowan ,  Marthinus Willem Da Silveira

IPC分类号： H04L27/28

CPC分类号： H04L27/2614

摘要： A system and method are provided for frequency domain peak power reduction on a plurality of orthogonal frequency divisional multiplexing (OFDM) signals in a communications system, wherein frequency domain processing of at least one OFDM signal carrier is iteratively performed to reduce peak power transmissions. OFDM signal carriers can include both in-band sub-carrier signals, and guard-band sub-carrier signals. Each iteration of peak power reduction takes as an input the frequency domain representation of the signal from the previous iteration that has been altered with respect to an error signal also represented in the frequency domain, determines an error signal (in the frequency domain), and subtracts this from the input to produce a further peak power reduced frequency domain signal. If there are no peaks above the configured peak power reduction threshold, then the signal passes through the FPPR iterations with no change.

摘要翻译： 提供了一种在通信系统中的多个正交频分复用（OFDM）信号上进行频域峰值功率降低的系统和方法，其中迭代地执行至少一个OFDM信号载波的频域处理以减少峰值功率传输。 OFDM信号载波可以包括带内子载波信号和保护带子载波信号。 峰值功率降低的每次迭代将来自先前迭代的信号的频域表示作为输入，其相对于也在频域中表示的误差信号已被改变，确定误差信号（在频域中），以及 从输入中减去此值，以产生另一个峰值功率降低的频域信号。 如果在配置的峰值功率降低阈值以上没有峰值，则信号通过FPPR迭代而没有变化。

公开(公告)号：US08812571B2

公开(公告)日：2014-08-19

申请号：US13106048

申请日：2011-05-12

申请人： Neil McGowan

发明人： Neil McGowan

IPC分类号： G06F17/10

CPC分类号： H03H17/0294 ,  H03H2017/0072

摘要： A spectrum agile radio having one or more variable digital filters is described. To quickly, yet accurately, retune the digital filter(s) a windowing function is applied to an ideal filter characteristic for each of one or more desired frequency bands to generate filter coefficients. Transitioning between coefficients of a previous filter and a current filter is handled to avoid problems associated with discontinuities in the signal processing.

摘要翻译： 描述具有一个或多个可变数字滤波器的频谱敏捷无线电装置。 为了快速而准确地重新调谐数字滤波器，将一个开窗函数应用于一个或多个所需频带中的每一个的理想滤波器特性以产生滤波器系数。 处理先前滤波器和当前滤波器的系数之间的转换以避免与信号处理中的不连续性有关的问题。