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公开(公告)号：US07227907B2
公开(公告)日：2007-06-05
申请号：US10386364
申请日：2003-03-10
摘要： A system causes a scan angle of a directional antenna to change temporarily from a current scan angle to at least one trial scan angle during reception of predetermined portions of an information carrying signal. At the trial scan angle(s), a trial metric associated with each trial scan angle is determined by the system. The system then selects a next scan angle based on the trial metrics. Examples of predetermined portions of the information carrying signal include the Power Control Bit (PCB) and certain symbol periods of the Forward Error Correction (FEC) block.
摘要翻译： 系统使得定向天线的扫描角度在接收信息携带信号的预定部分期间暂时从当前扫描角度改变为至少一个试射扫描角度。 在试验扫描角度，与每个试验扫描角度相关联的试验度量由系统确定。 然后，系统基于试验度量来选择下一个扫描角度。 信息携带信号的预定部分的示例包括功率控制位（PCB）和前向纠错（FEC）块的某些符号周期。
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公开(公告)号：US07221664B2
公开(公告)日：2007-05-22
申请号：US10171080
申请日：2002-06-12
CPC分类号： H04L1/165 , H04B1/707 , H04L7/06 , H04L25/14 , H04L27/2601 , H04Q11/0428 , H04Q2213/13098 , H04Q2213/13202 , H04Q2213/13204 , H04Q2213/13209 , H04Q2213/13216 , H04Q2213/1327 , H04Q2213/13298 , H04Q2213/13332 , H04Q2213/1336 , H04Q2213/13389 , H04W8/005 , H04W24/00 , H04W28/26 , H04W48/08 , H04W52/16 , H04W52/325 , H04W52/50 , H04W74/04 , H04W74/0866 , H04W76/10 , H04W76/28 , H04W84/14 , H04W88/02
摘要： A communication system, such as a wireless CDMA system, detects markers with fewer errors by having field units transmit the markers at different power levels (e.g., 9 dB for one marker and 11 dB for another marker). The difference in power levels of the markers allows the base station to identify the request markers using alternative criteria with a low probability of error, where the alternative criteria may include comparing the markers to respective energy level thresholds, monitoring occupancy of time slots, occupancy of mutually exclusive code channels, or combinations thereof. For example, in one particular embodiment, a request marker, which is generally a high priority marker, is transmitted with higher power, which improves the probability of detection and reduces the probability of false detection of the request marker.
摘要翻译： 诸如无线CDMA系统的通信系统通过使场地单元以不同的功率电平（例如，一个标记为9dB，另一个标记为11dB）发射标记来检测具有较少错误的标记。 标记的功率水平的差异允许基站使用具有低概率误差的替代标准来识别请求标记，其中替代标准可以包括将标记与相应的能级阈值进行比较，监视时隙的占用， 相互排斥的代码信道或其组合。 例如，在一个具体实施例中，通常是高优先级标记的请求标记以更高的功率发送，这提高了检测的概率，并降低了请求标记的错误检测的可能性。
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93.发明授权公开(公告)号：US07092430B2
公开(公告)日：2006-08-15
申请号：US11178767
申请日：2005-07-11
IPC分类号： H04B1/707
CPC分类号： H04B1/7107 , H04B2201/70701
摘要： A system and method for encoding/decoding data channels in a CDMA system having data channel interference cancellation, wherein data channel interference cancellation is used to remove unwanted non-orthogonal pilot signal components which are present within a demodulated data signal. This is accomplished by regenerating interference terms with respect to the non-orthogonal pilot signal and subtracting them from the demodulated data signal.
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94.发明授权Method and apparatus for adapting antenna array using received predetermined signal 失效使用接收的预定信号适配天线阵列的方法和装置公开(公告)号：US07009559B2
公开(公告)日：2006-03-07
申请号：US10914982
申请日：2004-08-10
IPC分类号： H01Q3/24
CPC分类号： H01Q1/246 , H01Q3/2605 , H01Q3/28 , H01Q3/36 , H04B7/0617 , H04B7/086
摘要： A mobile subscriber unit includes a smart antenna having antenna elements for generating a plurality of antenna beams, and adjustable weight control components connected to the antenna elements for selecting any one of the antenna beam. A transceiver is connected to the smart antenna. A beam selector controller is connected to the transceiver and operates in a coarse adjustment mode by jointly adjusting the weight control components when scanning through the antenna beams, and operates in a fine adjustment mode by independently adjusting the weight control components when one of the scanned antenna beams is selected.
摘要翻译： 移动用户单元包括具有用于产生多个天线波束的天线元件的智能天线以及连接到天线元件的可调重量控制元件，用于选择天线波束中的任何一个。 收发器连接到智能天线。 光束选择器控制器连接到收发器并通过在通过天线波束扫描时联合调整重量控制部件而以粗调模式操作，并且当扫描天线之一独立地调整重量控制部件时，以微调模式操作 选择光束。
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95.发明授权公开(公告)号：US06973140B2
公开(公告)日：2005-12-06
申请号：US09773253
申请日：2001-01-31
申请人： John E. Hoffman , George Rodney Nelson, Jr. , Daniel I. Riley , Antoine J. Rouphael , James A. Proctor, Jr.
发明人： John E. Hoffman , George Rodney Nelson, Jr. , Daniel I. Riley , Antoine J. Rouphael , James A. Proctor, Jr.
CPC分类号： H04L1/0048 , G11B20/1833 , H03M13/35 , H04B1/707 , H04J13/00 , H04L1/0003 , H04L1/0007 , H04L1/0009 , H04L1/0025 , H04L1/1809 , H04L1/1816 , H04L25/14 , H04L27/22 , H04L27/38 , H04L2001/0093 , H04L2001/0096
摘要： The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number of information bits per symbol, or Forward Error Code (FEC) coding rate. A forward error correction (FEC) block size is maintained at a constant amount. Therefore, as the number of information bits per symbol are increased, an integer multiple of bits per epoch is always maintained. The scheme permits for a greater flexibility and selection of effective data rates providing information bit rates ranging from, for example, approximately 50 kilobits per second to over 5 mega bits per second (Mbps) in one preferred embodiment.
摘要翻译： 本发明提供了在伪噪声（PN）编码的CDMA系统中进行码率调整和调制类型调整。 可以通过改变每个符号的信息比特数或转发错误码（FEC）编码率来进行编码速率调整。 前向纠错（FEC）块大小保持恒定的量。 因此，随着每个符号的信息位的数量增加，始终保持每个时期的位的整数倍。 在一个优选实施例中，该方案允许更大的灵活性和有效数据速率的选择，从而提供从例如大约50千比特每秒到超过5兆比特每秒（Mbps）的信息比特率。
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96.发明授权System and method for maintaining wireless channels over a reverse link of a CDMA wireless communication system 失效用于通过CDMA无线通信系统的反向链路维持无线信道的系统和方法公开(公告)号：US06940842B2
公开(公告)日：2005-09-06
申请号：US10755874
申请日：2004-01-12
IPC分类号： H04B1/707 , H04B1/7075 , H04B7/212 , H04B7/216 , H04J3/06 , H04J11/00 , H04J13/00 , H04J13/16 , H04J13/18 , H04L1/00 , H04L1/16 , H04L1/18 , H04L7/06 , H04L12/28 , H04L12/56 , H04L25/14 , H04L27/26 , H04Q11/04 , H04W28/20 , H04W28/22 , H04W52/02 , H04W56/00 , H04W72/04 , H04W74/00 , H04W74/04 , H04W84/14 , H04L3/16
CPC分类号： H04B7/2628 , H04B1/7075 , H04B1/70754 , H04B2001/70706 , H04B2201/70703 , H04B2201/70709 , H04B2201/70715 , H04J13/0022 , H04J13/004 , H04J13/16 , H04J13/18 , H04L1/0007 , H04L1/165 , H04L1/1809 , H04L7/06 , H04L25/14 , H04L27/2601 , H04Q11/0428 , H04Q2213/13098 , H04Q2213/13202 , H04Q2213/13204 , H04Q2213/13209 , H04Q2213/13216 , H04Q2213/1327 , H04Q2213/13298 , H04Q2213/13332 , H04Q2213/1336 , H04Q2213/13389 , H04W24/00 , H04W28/20 , H04W28/22 , H04W56/00 , H04W56/0045 , H04W56/0075 , H04W72/0413 , H04W72/044 , H04W72/0446 , H04W72/0453 , H04W72/0466 , H04W74/00 , H04W74/04 , H04W76/28 , H04W84/14
摘要： A method for providing wireless communication of digital signals is provided, with the digital signals being communicated between wireless subscriber units and a base station. The digital signals are communicated using at least one radio frequency (RF) channel via Code Division Multiple Access (CDMA) modulated radio signals defined by orthogonal codes. The method includes making available a plurality of orthogonal subchannels within each CDMA RF channel. Available orthogonal subchannels are allocated on an as-needed basis for subscriber units actively sending data. An idling mode connection is provided on a reverse link for subscriber units which are powered on, but not actively sending data, by assigning a shared orthogonal subchannel to at least two different subscriber units, but utilizing different time slots of the shared orthogonal subchannel.
摘要翻译： 提供了一种用于提供数字信号的无线通信的方法，其中数字信号在无线用户单元和基站之间进行通信。 使用由正交码定义的码分多址（CDMA）调制无线电信号，使用至少一个射频（RF）信道来传送数字信号。 该方法包括在每个CDMA RF信道内提供多个正交子信道。 根据主动发送数据的用户单元，根据需要分配可用的正交子信道。 在通过向共享正交子信道分配共享正交子信道但利用共享正交子信道的不同时隙的用户单元的反向链路上提供空闲模式连接，所述用户单元通电，但不主动发送数据。
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公开(公告)号：US06904079B2
公开(公告)日：2005-06-07
申请号：US09766875
申请日：2001-01-19
CPC分类号： H04L5/0046 , H04B1/707 , H04B2201/70701 , H04L7/041
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US06804223B2
公开(公告)日：2004-10-12
申请号：US09728575
申请日：2000-11-30
IPC分类号： H04J1300
CPC分类号： H04L5/005 , H04B1/707 , H04B7/2628 , H04B2201/70701 , H04L1/0041 , H04L1/0063 , H04L1/0065 , H04L1/0066 , H04L1/0071 , H04L5/0048 , H04L27/183 , H04L27/2657 , H04L27/2662
摘要： A technique for encoding digital communication signals. Data symbols are augmented in pilot symbols inserted at predetermined positions. The pilot augmented sequence is then fed to a deterministic error correction block encoder, such as a turbo product coder, to output a coded sequence. The symbols in the error correction encoded sequence are then rearranged to ensure that the output symbols derived from input pilot symbols are located at regular, predetermined positions. As a result, channel encoding schemes can more easily be used which benefits from power of two length block sizes.
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公开(公告)号：US06785323B1
公开(公告)日：2004-08-31
申请号：US09447022
申请日：1999-11-22
IPC分类号： H04B169
CPC分类号： H04L1/0041 , H03M13/03 , H04L1/0009 , H04L1/0025
摘要： A technique for encoding a signal used in a digital communication system in which individual traffic channel data rates may be adapted to specific channel conditions. In particular, a forward error correction coding rate is adapted for individual channels while at the same time maintaining a fixed block size independent of the FEC coding rate. This allows the system data rate to adapt to the channel conditions experienced by a specific user. Thus, users experiencing good communication conditions with low multipath distortion may be allocated higher capacity, whereas users with significant multipath distortion may make use of lower rate (higher levels of coding) error codes to maintain high quality. Messages are sent from a transmitter to a receiver to inform the receiver of the coding rate implemented at any given point in time. These parameters may be adjusted independent of transmitted power level through the expedient of ensuring that size of a transmitted frame remains constant, while permitting the ability to change FEC coding rates and FEC block sizes.
摘要翻译： 用于对在数字通信系统中使用的信号进行编码的技术，其中个体业务信道数据速率可以适应于特定信道条件。 特别地，前向纠错编码率适用于各个信道，同时保持独立于FEC编码率的固定块大小。 这允许系统数据速率适应特定用户经历的频道条件。 因此，具有低多径失真的良好通信条件的用户可以被分配较高的容量，而具有显着的多径失真的用户可以利用较低的速率（较高编码水平）的错误代码来维持高质量。 消息从发射机发送到接收机，以通知接收机在任何给定时间点实现的编码速率。 可以通过确保发送帧的大小保持恒定的方式来独立于发射功率电平来调整这些参数，同时允许改变FEC编码速率和FEC块大小的能力。
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公开(公告)号：US06421336B1
公开(公告)日：2002-07-16
申请号：US09313684
申请日：1999-05-18
IPC分类号： H04B1500
CPC分类号： H04J13/004 , H04J13/0022 , H04J13/10 , H04J13/102
摘要： A method and apparatus for creating non-interfering coded signals to be simultaneously transmitted over a common frequency in a wireless communication systems, such as a CDMA system, at various data rates and without the use of orthogonal codes and/or orthogonal code generation techniques. The system provides cascaded arrangement of code modulations which each include a channel sequence combiner and selector. The channel sequence combiner receives an input signal and a repetitive maximum length channel sequence and combines these signals to produce a combined signal. The selector receives the input signal, the combined signal, and a repetitive strobe signal, and selects either the input signal or the combined signal to produce an encoded signal based upon a value of the repetitive strobe signal.
摘要翻译： 一种用于在诸如CDMA系统的无线通信系统中以各种数据速率并且不使用正交码和/或正交码生成技术在公共频率上同时发送不干扰编码信号的方法和装置。 该系统提供代码调制的级联布置，每个编码调制包括通道序列组合器和选择器。 信道序列组合器接收输入信号和重复最大长度信道序列，并组合这些信号以产生组合信号。 选择器接收输入信号，组合信号和重复选通信号，并且基于重复选通信号的值选择输入信号或组合信号以产生编码信号。
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