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51.发明授权Interaction between an adjunct positioning system and a radiocommunication system 失效辅助定位系统与无线电通信系统之间的相互作用公开(公告)号：US06826394B1
公开(公告)日：2004-11-30
申请号：US08839861
申请日：1997-04-22
IPC分类号： H04M1100
摘要： Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide techniques which provide for interaction between an adjunct system whose primary function is to provide terminal unit location information and the radiocommunication system. For example, the location information generated by the adjunct system can be used by the radiocommunication system for other purposes, e.g., dynamic channel allocation.
摘要翻译： 在不久的将来，紧急呼叫处理可能需要向紧急服务中心提供终端单元位置信息。 本发明的示例性实施例提供了提供主要功能是提供终端单元位置信息的辅助系统与无线电通信系统之间的交互的技术。 例如，由附加系统生成的位置信息可被无线电通信系统用于其它目的，例如动态信道分配。
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公开(公告)号：US06597743B1
公开(公告)日：2003-07-22
申请号：US09454577
申请日：1999-12-07
IPC分类号： H04L2302
CPC分类号： H03M13/3955
摘要： A reduced search symbol estimation algorithm includes a forward recursion, a backward recursion, and a combining step. To reduce complexity, during the forward and backward recursions, the number of survivor states retained at each stage is less than the total number of states of the trellis. The survivor states are selected from a group of candidate states, that are connected by branches to survivors from the previous stage of the recursion. The decoder compares the accumulated path metrics for each candidate state and retains a specified number of states that is less than the total possible number of states. For the forward recursion, the retained states or survivor states, denoted as Qk, are stored along with the corresponding state metrics. For the backward recursion, the retained states, denoted as Rk, are stored along with the corresponding state metrics. During the combining step, the computation of a soft value is restricted to branches (s′,s) connecting survivor states s′ and s in the forward and backward recursions respectively.
摘要翻译： 减少的搜索符号估计算法包括正向递归，反向递归和组合步骤。 为了减少复杂性，在向前和向后递归期间，每个阶段保留的幸存者国家数量小于网格状态总数。 幸存者状态是从一组候选国中选出的，这些候选国通过分支到递归的前一阶段与幸存者相连。 解码器比较每个候选状态的累积路径度量，并保留小于总可能状态数的指定数量的状态。 对于正向递归，保留状态或幸存者状态（表示为Qk）与相应的状态度量一起存储。 对于反向递归，表示为Rk的保留状态与相应的状态度量一起存储。 在组合步骤中，软值的计算分别限制在向前和向后递归中连接幸存者状态s'和s的分支（s'，s）。
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53.发明授权公开(公告)号：US06574293B1
公开(公告)日：2003-06-03
申请号：US09181203
申请日：1998-10-28
IPC分类号： H04B700
CPC分类号： H04L1/06 , H04B7/0845 , H04L25/03006 , H04L25/067
摘要： A method for reducing interference combines soft symbols using existing processing devices. In particular, transmitted data signals are received over a plurality of paths. The received data signal includes an interference component. The received data signals are processed to provide a plurality of soft symbols that correspond to the transmitted data signal. The plurality of soft symbols are combined to reduce the interference component of the data signal and provided output signal that corresponds to the transmitted data signal. Accordingly, existing equalizers and combiners may be used to reduce interference. Related mobile user terminal and receivers are disclosed.
摘要翻译： 减少干扰的方法使用现有的处理装置组合软符号。 特别地，发送的数据信号在多个路径上被接收。 所接收的数据信号包括干扰分量。 处理所接收的数据信号以提供对应于所发送的数据信号的多个软符号。 组合多个软符号以减少数据信号的干扰分量并提供对应于发送的数据信号的输出信号。 因此，可以使用现有的均衡器和组合器来减少干扰。 公开了相关的移动用户终端和接收机。
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54.发明授权Information generation for coherent demodulation of differentially encoded signals 失效用于差分编码信号的相干解调的信息生成公开(公告)号：US06487255B1
公开(公告)日：2002-11-26
申请号：US09143754
申请日：1998-08-31
IPC分类号： H04L512
CPC分类号： H04L25/03184 , H04L25/03318 , H04L2025/03375
摘要： Methods and systems are provided which generate hard and soft values from signal samples of a differentially encoded signal by estimating channel coefficients associated with the received signal and determining metrics for each possible symbol pair which indicate the probability of a possible coherent symbol pair being encoded in the signal samples using the estimated channel coefficients and the signal samples. Soft values associated with differential bits or differential symbols encoded in the samples of the signal are then generated based on the determined metrics.
摘要翻译： 提供了通过估计与接收信号相关联的信道系数并确定每个可能符号对的度量的方法和系统，其通过差分编码信号的信号样本产生硬和软值，其指示可能的相干符号对在 信号样本使用估计的信道系数和信号样本。 然后基于所确定的度量来生成与信号样本中编码的差分比特或差分符号相关联的软值。
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55.发明授权公开(公告)号：US06477362B1
公开(公告)日：2002-11-05
申请号：US08844883
申请日：1997-04-22
IPC分类号： H04Q722
摘要： Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide techniques which pass the mobile unit's phone number along to an appropriate emergency service centers in addition to location information. This information can be made available to an adjunct monitoring system by either changing the mobile station identity used to package (Layer 2) an access attempt or by commanding a mobile or base station to explicitly transmit the mobile unit's dialable number during an emergency access so that the adjunct system can read and forward this number.
摘要翻译： 在不久的将来，紧急呼叫处理可能需要向紧急服务中心提供终端单元位置信息。 本发明的示例性实施例提供除了位置信息之外还将移动单元的电话号码一直传递到适当的紧急服务中心的技术。 该信息可以通过改变用于封装（第二层）接入尝试的移动站标识或通过命令移动或基站在紧急接入期间明确地发送移动单元的可拨号码使其可用于附属监控系统，使得 辅助系统可以读取和转发该号码。
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56.发明授权Digital communication systems and methods for differential and/or amplitude encoding and decoding secondary symbols 有权用于差分和/或幅度编码和解码辅助符号的数字通信系统和方法公开(公告)号：US06426978B1
公开(公告)日：2002-07-30
申请号：US09164600
申请日：1998-10-01
IPC分类号： H04L2302
摘要： Digital communication systems and methods combine block encoding and differential and/or amplitude modulation. For every codeword period, one or more additional bits can be transmitted by applying differential modulation and/or amplitude modulation to the codewords. In differential modulation, additional information may be sent by flipping or not flipping the sign of a codeword. In amplitude modulation, additional information may be sent by changing the amplitude of successive codewords. A combination of differential and amplitude encoding may also be used. Thus, the data rate can be increased without increasing the symbol transmission rate.
摘要翻译： 数字通信系统和方法组合块编码和差分和/或幅度调制。 对于每个码字周期，可以通过对码字应用差分调制和/或幅度调制来发送一个或多个附加位。 在差分调制中，可以通过翻转或不翻转码字的符号来发送附加信息。 在幅度调制中，可以通过改变连续码字的幅度来发送附加信息。 还可以使用差分和幅度编码的组合。 因此，可以增加数据速率而不增加符号传输速率。
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公开(公告)号：US06282181B1
公开(公告)日：2001-08-28
申请号：US09065590
申请日：1998-04-24
申请人： Wayne Stark , Gregory E. Bottomley , Paul W. Dent
发明人： Wayne Stark , Gregory E. Bottomley , Paul W. Dent
IPC分类号： H04B7216
CPC分类号： G06F7/724
摘要： Pseudorandom number sequence generation is a significant component in a variety of existing and proposed CDMA systems. In CDMA handsets, techniques for sequence generation in conjunction with sleep mode are an important component in paging performance and standby time. Techniques are described herein for properly advancing sequence states in conjunction with, for example, sleep mode without detrimentally draining battery capacity.
摘要翻译： 伪随机数序列生成是各种现有和提出的CDMA系统中的重要组成部分。 在CDMA手机中，结合睡眠模式的序列生成技术是寻呼性能和待机时间的重要组成部分。 这里描述了与例如睡眠模式一起正确地提升序列状态而不会不利地耗尽电池容量的技术。
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公开(公告)号：US5937015A
公开(公告)日：1999-08-10
申请号：US710537
申请日：1996-09-19
申请人： Paul W. Dent , Gregory E. Bottomley
发明人： Paul W. Dent , Gregory E. Bottomley
IPC分类号： H03M13/41 , H01Q1/24 , H01Q21/08 , H01Q21/28 , H03M13/00 , H03M13/27 , H03M13/35 , H03M13/45 , H04B7/08 , H04B7/10 , H04B7/185 , H04L1/00 , H04L1/06 , H04L25/03 , H04L25/08 , H04L27/00 , H04W84/02 , H04B1/10 , H03M13/22
CPC分类号： H04L1/0069 , H01Q1/246 , H01Q21/08 , H01Q21/28 , H03M13/27 , H03M13/35 , H03M13/41 , H04B7/0851 , H04B7/10 , H04B7/18515 , H04B7/18532 , H04B7/18567 , H04L1/0048 , H04L1/0054 , H04L1/007 , H04L1/0071 , H04L25/03203 , H04L25/03331 , H04W84/025 , H04B7/0837
摘要： A digital information bit that has been encoded and transmitted as a first modulated signal from a first transmitter in the presence of a second modulated signal that has been transmitted by a second transmitter is received and decoded by receiving a composite signal that is a sum of the first modulated signal and the second modulated signal. The composite signal is processed to generate a complex numerical sample. Then, a plurality of bit pairs are hypothesized, wherein each hypothesized bit pair includes a hypothesized first information bit encoded and transmitted by the first transmitter and a hypothesized second information bit encoded and transmitted by the second transmitter. For each of the plurality of hypothesized bit pairs, a path metric is generated that is indicative of a likelihood that information sequence estimates are accurate estimates, wherein the information sequence estimates include the hypothesized first and second information bits. For each of the plurality of hypothesized bit pairs, the generated path metric is added to a previously determined cumulative path metric to generate a most recent cumulative path metric. An information sequence estimate is selected that has a lowest most recent cumulative path metric, wherein the selected information sequence estimate includes an information sequence estimated to have been encoded and transmitted by the first transmitter and an information sequence estimated to have been encoded and transmitted by the second transmitter.
摘要翻译： 在存在由第二发送机发送的第二调制信号的情况下，已经被编码并作为来自第一发送机的第一调制信号发送的数字信息比特通过接收和解码，该复合信号是 第一调制信号和第二调制信号。 处理复合信号以产生复数数值样本。 然后，假设多个比特对，其中每个假设的比特对包括由第一发射机编码和发送的假设的第一信息比特和由第二发射机编码和发射的假设的第二信息比特。 对于多个假设比特对中的每一个，生成指示信息序列估计是精确估计的可能性的路径度量，其中信息序列估计包括假定的第一和第二信息比特。 对于多个假设比特对中的每一个，生成的路径量度被加到先前确定的累积路径度量以生成最近的累积路径量度。 选择具有最低最近累积路径量度的信息序列估计，其中所选择的信息序列估计包括被估计为由第一发射机编码和传输的信息序列，以及被估计为由 第二发射机。
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公开(公告)号：US5889827A
公开(公告)日：1999-03-30
申请号：US766167
申请日：1996-12-12
CPC分类号： H04B1/707 , H04B7/005 , H04L25/0202 , H04L25/03178 , H04L25/03299
摘要： According to the present invention, the effects of the transmission medium on transmitted information symbols are estimated separately from other effects, e.g., those associated with receive and transmit filters, using knowledge of the pulse shaping. The medium response estimate is then used to detect information symbols. Previously, receivers had used estimates of the composite channel to detect symbols. This, however, assumed uncorrelated noise, which is not always the case.
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公开(公告)号：US5677930A
公开(公告)日：1997-10-14
申请号：US504339
申请日：1995-07-19
申请人： Gregory E. Bottomley
发明人： Gregory E. Bottomley
IPC分类号： H04B1/7105 , H04B7/26 , H04B1/707
CPC分类号： H04B1/71052
摘要： Methods and systems for receiving signals in spread spectrum communications are described. In CDMA systems, for example, signature sequences used to generate correlations with received signals may not have ideal autocorrelation properties. In such cases, the correlations determined by the receiver may include errors which are propagated through channel tap estimates to the demodulated and decoded information symbols. To reduce or eliminate such self-interference or inter-ray interference, the correlations are decorrelated by, for example, matrix multiplying them with values related to values of the autocorrelation function for the signature sequence of interest.
摘要翻译： 描述了用于在扩频通信中接收信号的方法和系统。 在CDMA系统中，例如，用于产生与接收信号的相关性的签名序列可能不具有理想的自相关特性。 在这种情况下，由接收机确定的相关性可以包括通过信道抽头估计传播到经解调和解码的信息符号的错误。 为了减少或消除这种自干扰或射线间干扰，相关性通过例如将它们与与感兴趣的签名序列的自相关函数的值相关的值进行解相关。
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