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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：US08134980B2
公开(公告)日：2012-03-13
申请号：US11805013
申请日：2007-05-22
CPC分类号： H04B1/707 , H04L1/165 , 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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公开(公告)号：US08072958B2
公开(公告)日：2011-12-06
申请号：US12290755
申请日：2008-11-03
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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84.发明授权System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system 有权用于通过CDMA无线通信系统的反向链路维持同步消息定时的系统和方法公开(公告)号：US07936728B2
公开(公告)日：2011-05-03
申请号：US09997732
申请日：2001-11-29
IPC分类号： H04B7/216
CPC分类号： H04W56/00 , H04B7/2668 , H04J13/18 , H04L1/0007 , H04L1/165 , H04L1/1809 , H04L25/14 , H04Q11/0428 , H04Q2213/13098 , H04Q2213/13202 , H04Q2213/13204 , H04Q2213/13209 , H04Q2213/13216 , H04Q2213/1327 , H04Q2213/13298 , H04Q2213/13332 , H04Q2213/1336 , H04Q2213/13389 , H04W84/14
摘要： A service option overlay for a CDMA wireless communication in which multiple allocatable subchannels are defined on a reverse link by assigning different code phases of a given long pseudonoise (PN) code to each subchannel. The instantaneous bandwidth needs of each on-line subscriber unit are then met by dynamically allocating none, one, or multiple subchannels on an as needed basis for each network layer connection. The system efficiently provides a relatively large number of virtual physical connections between the subscriber units and the base stations on the reverse link for extended idle periods such as when computers connected to the subscriber units are powered on, but not presently actively sending or receiving data. These maintenance subchannels permit the base station and the subscriber units to remain in phase, time and power synchronism while maintaining optimal timing control over synchronization messages. This in turn allows fast acquisition of additional reverse link capacity as needed by allocating additional orthogonal codes within the same code phase and by varying the spreading factor of the codes, as well as by adding additional code phases.
摘要翻译： 一种用于CDMA无线通信的服务选项覆盖，其中通过向每个子信道分配给定长伪噪声（PN）码的不同码相位，在反向链路上定义多个可分配子信道。 然后通过根据需要基于每个网络层连接动态分配一个，一个或多个子信道来满足每个在线订户单元的瞬时带宽需求。 系统有效地在用户单元和反向链路上的基站之间提供相对大量的虚拟物理连接，用于延长的空闲周期，例如当连接到订户单元的计算机上电时，而不是当前主动发送或接收数据。 这些维护子信道允许基站和用户单元保持同步，时间和功率同步，同时保持对同步消息的最佳定时控制。 这又允许通过在相同码相中分配附加正交码并通过改变码的扩展因子以及通过添加附加码相位来快速获取额外的反向链路容量。
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公开(公告)号：US07889702B2
公开(公告)日：2011-02-15
申请号：US11189529
申请日：2005-07-26
IPC分类号： H04J13/00
CPC分类号： H04L69/22 , H04L1/0001 , H04L1/0083 , H04L2001/0093 , H04W28/18 , H04W72/04 , H04W72/0446
摘要： An illustrative embodiment of the present invention supports the transmission of data to a user on an as-needed basis over multiple allocated data channels. Data packets are transmitted in time-slots of the allocated data channels to corresponding target receivers without the need for explicitly assigning particular time-slots to a target user well in advance of transmitting any data packets in the time-slots. Instead, each data packet transmitted in a time-slot includes a header label or preamble indicating to which of multiple possible receivers a data packet is directed. The preamble also preferably includes decoding information indicating how a corresponding data payload of the data packet is to be processed for recapturing transmitted raw data.
摘要翻译： 本发明的说明性实施例支持在多个分配的数据信道上根据需要向用户传输数据。 数据分组在分配的数据信道的时隙中被发送到相应的目标接收机，而不需要在时隙内发送任何数据分组之前向目标用户明确地分配特定的时隙。 相反，在时隙中发送的每个数据分组包括指示数据分组指向的多个可能的接收机中的哪一个的报头标签或前导码。 前导码还优选地包括指示如何处理数据分组的相应数据有效载荷以用于重新捕获发送的原始数据的解码信息。
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86.发明授权Power control protocol for highly variable data rate reverse link of a wireless communication system 失效用于无线通信系统高可变数据速率反向链路的功率控制协议公开(公告)号：US07701903B2
公开(公告)日：2010-04-20
申请号：US11706463
申请日：2007-02-13
CPC分类号： H04W52/04 , H04B7/2628 , H04W52/08 , H04W52/143 , H04W52/146 , H04W52/287 , H04W52/288 , H04W52/50 , H04W52/58
摘要： A technique for implementing closed loop power control in a wireless system using a modulation that requires synchronization over the radio channel, which dynamically assigns coded channels on a demand basis. The technique maintains a proper power level, even when no traffic channels are allocated, by determining a link quality metric based upon the reverse link power received. This determination is made in response to a heartbeat signal sent at a rate which is only sufficiently fast to maintain code phase lock, for example, depending upon the expected maximum rate at which the subscriber unit will travel.
摘要翻译： 一种用于在无线系统中实现闭环功率控制的技术，其使用需要通过无线电信道进行同步的调制，其基于需求动态分配编码信道。 即使没有业务信道被分配，该技术通过基于所接收的反向链路功率确定链路质量度量来维持适当的功率电平。 该确定响应于仅以足够快的速率发送的心跳信号，以维持代码锁相，例如，取决于用户单元将要行进的预期最大速率。
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87.发明授权Variable rate forward error correction for enabling high performance communication 有权用于实现高性能通信的可变速率前向纠错公开(公告)号：US07593380B1
公开(公告)日：2009-09-22
申请号：US09263358
申请日：1999-03-05
IPC分类号： H04Q7/24
CPC分类号： H04J13/16 , G11B20/1833 , H03M13/35 , H04B7/2631 , H04B2201/709709 , H04L1/0007 , H04L1/0025 , H04L1/0041 , H04L1/0042 , H04L1/0057 , H04L1/1607 , H04L1/1809 , H04L1/1816 , H04L1/1835 , H04L25/14
摘要： A protocol for optimizing the use of coded transmissions such as over wireless links. In this technique, interframes are first split into segments selected to be an optimum size according to transmission characteristics of the radio channel. Segments are assigned a position identifier and redundancy check sum. Segments are then assembled into blocks and a forward error correction algorithm is applied to the block to generate redundancy bits. The FEC block is then split up among available communication channels and forwarded to the receiver. The inverse process is applied at the receiver. Using this scheme, only segments containing erroneous data need to be resent. A large block size required for high performance forward error correction may therefore be used while at the same time minimizing latencies associated with the need to resend entire blocks when errors cannot be recovered.
摘要翻译： 用于优化诸如通过无线链路的编码传输的使用的协议。 在这种技术中，根据无线电信道的传输特性，接口帧首先被分成被选择为最佳大小的段。 分段被分配一个位置标识符和冗余校验和。 然后，段被组合成块，并且将前向纠错算法应用于块以产生冗余位。 然后，FEC块在可用的通信信道之间分离并转发给接收机。 在接收器处应用逆过程。 使用此方案，只有包含错误数据的段才需要重新发送。 因此，可以使用高性能前向纠错所需的大块大小，同时最小化与错误无法恢复时需要重新发送整个块相关联的延迟。
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公开(公告)号：US07580674B2
公开(公告)日：2009-08-25
申请号：US10378565
申请日：2003-03-03
申请人： Thomas E. Gorsuch , John A. Regnier , John E. Hoffmann , George Rodney Nelson, Jr. , James A. Proctor, Jr.
发明人： Thomas E. Gorsuch , John A. Regnier , John E. Hoffmann , George Rodney Nelson, Jr. , James A. Proctor, Jr.
IPC分类号： H04B7/14 , H04B1/00 , H04B15/00 , H04B1/06 , H04B7/00 , H04B1/38 , H04B7/212 , H04M1/00 , H01Q3/00 , H01Q3/12 , H01Q3/02 , G01S5/04 , H03F3/16
CPC分类号： H01Q1/2275 , H01Q1/22 , H01Q1/2258 , H01Q1/242 , H01Q3/2605 , H01Q19/32
摘要： An antenna control interface is integrated with common integrated circuit components, such as radio transceiver or baseband modem signal processing control logic. The antenna control interface controls the operation of an adaptive antenna array used with wireless communication system devices.
摘要翻译： 天线控制接口与通用集成电路组件集成，如无线电收发器或基带调制解调器信号处理控制逻辑。 天线控制接口控制与无线通信系统设备一起使用的自适应天线阵列的操作。
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公开(公告)号：US20090135950A1
公开(公告)日：2009-05-28
申请号：US12326487
申请日：2008-12-02
申请人： John E. Hoffmann , George Rodney Nelson, Jr. , Daniel I. Riley , Antoine J. Rouphael , James A. Proctor, Jr.
发明人： John E. Hoffmann , George Rodney Nelson, Jr. , Daniel I. Riley , Antoine J. Rouphael , James A. Proctor, Jr.
IPC分类号： H04L27/36
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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公开(公告)号：US07394791B2
公开(公告)日：2008-07-01
申请号：US10171378
申请日：2002-06-12
CPC分类号： H04Q11/04 , H04B1/7075 , H04J13/0077 , H04J13/16 , H04L1/0007 , H04L1/1809 , H04L5/0007 , 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 , H04W28/04 , H04W28/18 , H04W72/0446 , H04W74/004 , H04W74/04 , H04W74/0833 , H04W84/14
摘要： A communications system improves performance of detecting a signal having an indication of a request to change communications states by making at least two positive identifications of the request in a given time frame. The system may further improve performance by applying a difference in power levels for a non-request state (i.e., steady state or ‘control hold’ state) versus a request state (i.e., ‘request to change’ state). In one particular application, a base station determines a request to change communications states with a reasonably high probability of detection and a reasonably low probability of false detection. The system has a reduced number of erroneous communications states, such as erroneous traffic channel allocations. The detection technique is compatible with 1xEV-DV systems and I-CDMA systems, but general enough to support systems employing various other communications protocols used in wired and wireless communications systems.
摘要翻译： 通信系统通过在给定的时间帧内进行至少两个请求的肯定标识来改善检测具有改变通信状态的请求的指示的信号的性能。 该系统可以通过对于非请求状态（即，稳态或“控制保持”状态）与请求状态（即，“改变请求”状态）的功率电平的差异来进一步提高性能。 在一个特定应用中，基站以相当高的检测概率确定改变通信状态的请求，并且具有相当低的错误检测概率。 该系统具有减少的错误通信状态的数量，例如错误的业务信道分配。 该检测技术与1xEV-DV系统和I-CDMA系统兼容，但一般足以支持采用有线和无线通信系统中使用的各种其他通信协议的系统。
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