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31.发明授权公开(公告)号：US08509835B2
公开(公告)日：2013-08-13
申请号：US10401115
申请日：2003-03-26
IPC分类号： H04B7/00
摘要： In an illustrative embodiment of the present invention, a reference signal including pilot information is transmitted from a base station to one or multiple field units over a pilot channel. A message is also sent to the field units over a paging channel to indicate an effective radiated power level at which the reference signal is transmitted on the pilot channel. Based on a received power level of the reference signal at a field unit and the effective radiated power level of the reference signal, a forward path loss is estimated at the field unit for the forward link between the base station and field unit. Assuming the path loss in the reverse link is approximately the same as the estimated forward link path loss, the field unit can transmit, a reply message in the reverse link so that the base station generally receives a message at a desired power level.
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公开(公告)号：US08830977B2
公开(公告)日：2014-09-09
申请号：US13311151
申请日：2011-12-05
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.
摘要翻译： 一种用于编码数字通信信号的技术。 数据符号在插入预定位置的导频符号中增加。 导频增强序列然后被馈送到诸如turbo乘积编码器的确定性纠错块编码器，以输出编码序列。 然后重新排列纠错编码序列中的符号，以确保从输入导频符号导出的输出符号位于规则的预定位置。 结果，可以更容易地使用信道编码方案，其受益于两个长度块大小的功率。
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公开(公告)号：US08509268B2
公开(公告)日：2013-08-13
申请号：US13335575
申请日：2011-12-22
CPC分类号： H04W56/0005 , H04B7/2668 , H04W56/0045 , H04W56/005
摘要： A method for use in a field unit operable in a wireless communication network. The method includes receiving an indication of a plurality of access identifiers from a base station. The field unit selects an access identifier from the plurality of access identifiers received from the base station. The selected access identifier is associated with a type of field unit request. The field unit transmits the selected access identifier to the base station. The field unit then receives a message from the base station. The message is based on the transmitted selected access identifier. The message contains a timing adjustment that indicates an amount to advance timing. A corresponding field unit apparatus, a base station method, and corresponding base station apparatus is also disclosed.
摘要翻译： 一种在无线通信网络中可操作的现场单元中使用的方法。 该方法包括从基站接收多个接入标识符的指示。 场单元从从基站接收的多个接入标识符中选择接入标识符。 所选择的访问标识符与一种字段单元请求相关联。 现场单元将所选择的接入标识符发送到基站。 然后，现场单元从基站接收消息。 消息基于发送的所选访问标识符。 该消息包含指示提前时间的量的时序调整。 还公开了相应的现场单元设备，基站方法和相应的基站设备。
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34.发明授权Method for searching pilot signals to synchronize a CDMA receiver with an associated transmitter 有权用于搜索导频信号以使CDMA接收机与相关联的发射机同步的方法公开(公告)号：US08315294B2
公开(公告)日：2012-11-20
申请号：US13073594
申请日：2011-03-28
IPC分类号： H04B1/38
CPC分类号： H04W56/001 , H04B1/7075 , H04B1/70775 , H04B1/7103 , H04B7/086 , H04B2201/70701 , H04L27/2273 , H04L2027/0057 , H04L2027/0087
摘要： A method for synchronizing a CDMA receiver to a transmitter when an adaptive antenna is utilized to receive transmitted data, wherein a receiving antenna system is adapted between a 360° reception angle pattern (i.e., an omni-directional pattern) and a fixed reception angle (i.e., a directional pattern) by permitting the receiver to identify a pilot signal having the largest magnitude. The receiver minimizes interference from other pilot signals by steering antenna pattern nulls toward other transmitters. As a result, the time required for the receiver to acquire a valid pilot signal is significantly reduced.
摘要翻译： 一种当使用自适应天线来接收发射数据时将CDMA接收机同步到发射机的方法，其中接收天线系统适应于360°接收角度模式（即，全向模式）和固定接收角度 即，方向图），通过允许接收机识别具有最大幅度的导频信号。 接收器通过向其他发射机转向天线图形零点来最小化来自其他导频信号的干扰。 结果，接收机获取有效导频信号所需的时间显着减少。
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35.发明申请METHOD FOR SEARCHING PILOT SIGNALS TO SYNCHRONIZE A CDMA RECEIVER WITH AN ASSOCIATED TRANSMITTER 有权搜索引航信号以同步相关发射机的CDMA接收机的方法公开(公告)号：US20110170493A1
公开(公告)日：2011-07-14
申请号：US13073594
申请日：2011-03-28
IPC分类号： H04W40/00
CPC分类号： H04W56/001 , H04B1/7075 , H04B1/70775 , H04B1/7103 , H04B7/086 , H04B2201/70701 , H04L27/2273 , H04L2027/0057 , H04L2027/0087
摘要： A method for synchronizing a CDMA receiver to a transmitter when an adaptive antenna is utilized to receive transmitted data, wherein a receiving antenna system is adapted between a 360° reception angle pattern (i.e., an omni-directional pattern) and a fixed reception angle (i.e., a directional pattern) by permitting the receiver to identify a pilot signal having the largest magnitude. The receiver minimizes interference from other pilot signals by steering antenna pattern nulls toward other transmitters. As a result, the time required for the receiver to acquire a valid pilot signal is significantly reduced.
摘要翻译： 一种当使用自适应天线来接收发射数据时将CDMA接收机同步到发射机的方法，其中接收天线系统适应于360°接收角度模式（即，全向模式）和固定接收角度 即，方向图），通过允许接收机识别具有最大幅度的导频信号。 接收器通过向其他发射机转向天线图形零点来最小化来自其他导频信号的干扰。 结果，接收机获取有效导频信号所需的时间显着减少。
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公开(公告)号：US07079523B2
公开(公告)日：2006-07-18
申请号：US09775305
申请日：2001-02-01
CPC分类号： H04W56/0085 , H04B7/2637
摘要： Multiple field units in a CDMA system are synchronized for communication with a base station using shared forward and reverse link channels. In an illustrative embodiment, each field unit is assigned a time slot in a forward link channel to receive messages from the base station. Likewise, each field unit is assigned a time slot on a common reverse link channel for transmitting messages to the base station. Timing alignment and power level control among each of many field units and the base station is achieved by analyzing messages received at the base station in a corresponding time slot as transmitted by each field unit. Thereafter, a message is transmitted from the base station in a corresponding time slot to a particular field unit for adjusting its timing or power level so that future messages transmitted from the field unit are received in the appropriate time slot at the base station at a desired power level. In this way, minimal resources are deployed to maintain communication and precise synchronization between a base station and each of multiple users, minimizing collisions between field units transmitting in adjacent time slots on the reverse link. This method reduces the frequency a field unit must rely on the use of a slotted aloha random access channel according to IS-95.
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37.发明授权Access probe acknowledgment including collision detection to avoid oversetting initial power level 有权访问探测确认，包括碰撞检测，以避免初始功率级别过大公开(公告)号：US06545994B2
公开(公告)日：2003-04-08
申请号：US09792410
申请日：2001-02-23
IPC分类号： H04B7212
CPC分类号： H04W52/242 , H04L1/1607 , H04L12/5602 , H04L47/14 , H04L47/26 , H04L2001/0093 , H04W24/00 , H04W52/228 , H04W52/48 , H04W52/50 , H04W74/0825 , H04W74/0858
摘要： In an illustrative embodiment of the present invention, a first channel is allocated for transmitting sporadically generated messages from multiple field units to a base station. The first channel is preferably divided into time slots in which a field unit transmits an access request message to the base station for establishing a communication link. In response to an access request message, feedback information is provided from the base station to multiple field units indicating whether a collision was detected on the first channel for a message transmitted in a previous time slot. In an instance when a collision is detected, the field unit will re-transmit an access request message at a previous power level setting based on a random back off time. If no collision is detected and the base station fails to transmit an acknowledgment message from the base station to the access requesting field unit, the power output level of the field unit is increased for successive message transmissions until the message is received.
摘要翻译： 在本发明的说明性实施例中，分配第一信道用于将来自多个场单元的偶发生成的消息发送到基站。 第一信道优选地被划分为时隙，其中，场单元向基站发送接入请求消息以建立通信链路。 响应于访问请求消息，反馈信息从基站提供给多个字段单元，指示在第一信道上是否检测到在先前时隙中发送的消息的冲突。 在检测到冲突的情况下，场单元将基于随机退避时间在先前功率电平设置下重新发送接入请求消息。 如果没有检测到冲突，并且基站无法从基站向接入请求字段单元发送确认消息，则对于连续的消息传输增加了现场单元的功率输出电平，直到接收到消息。
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公开(公告)号：US08175120B2
公开(公告)日：2012-05-08
申请号：US09778474
申请日：2001-02-07
CPC分类号： H04W56/0005 , H04B7/2668 , H04W56/0045 , H04W56/005
摘要： Multiple field units in a CDMA system are synchronized for communication with a base station using a shared forward and reverse link channel. Each field unit is assigned a time slot in a forward link channel to receive messages from the base station. Likewise, each field unit is assigned a time slot on a common reverse link channel for transmitting messages to the base station. Timing alignment among each of many field units and the base station is achieved by analyzing messages received at the base station in a corresponding time slot from each field unit. Thereafter, a message is transmitted in a corresponding time slot to a particular field unit from the base station for adjusting its timing so that future messages transmitted from the field unit are received in the appropriate time slot at the base station. In this way, minimal resources are deployed to maintain communication and precise synchronization between a base station and each of multiple users, minimizing collisions between field units transmitting in adjacent time slots on the reverse link.
摘要翻译： CDMA系统中的多个场单元被同步，以使用共享的前向和反向链路信道与基站进行通信。 每个现场单元在前向链路信道中分配一个时隙以从基站接收消息。 类似地，每个现场单元在公共反向链路信道上分配一个时隙，用于向基站发送消息。 通过在每个场单元的相应时隙中分析在基站处接收的消息来实现多个场单元和基站中的每一个的定时对准。 此后，在相应的时隙中将消息从基站发送到特定的现场单元，以调整其定时，从而在基站的适当的时隙中接收从现场单元发送的未来消息。 以这种方式，部署最小资源以维持基站与多个用户中的每一个之间的通信和精确同步，从而最小化在反向链路上的相邻时隙中发送的现场单元之间的冲突。
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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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公开(公告)号：US08462689B2
公开(公告)日：2013-06-11
申请号：US11022353
申请日：2004-12-22
CPC分类号： H04L1/0045 , H04L1/004 , H04L1/0041 , H04L2001/0093 , H04W28/06 , H04W72/0413 , H04W72/0446 , H04W74/004 , H04W74/006
摘要： A technique for a time division multiplex system in which access to shared broadcast communication media is granted on a demand basis. Particular connections are assigned slot times at the transmitter based on demand. However, no specific information regarding the assignment of time slots need be communicated to the receivers. The transmit side employs a forward error correction technique followed by multiplication by a cover sequence unique to each connection. All receivers listen to the broadcast transmission channel all of the time. The receiver assigned to each connection decodes the signals in such a manner that only the receiver with the correct cover sequence assigned to a particular connection will successfully decode the data associated with that connection. Data frames that fail the forward error correction process are discarded, and only those frames which are successfully decoded are passed up to a higher layer. The occurrence of an erroneously received frame is not necessarily always reported to the transmit side of the connection; only a packet level error indication is made. In this way, information containing time slot assignment need not be communicated between the transmitter and receiver, and yet data will be correctly received.
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