-
61.发明申请Method and Apparatus for Selecting Signal Processing Delays Based on Historical Selection Data 有权基于历史选择数据选择信号处理延迟的方法和装置公开(公告)号：US20080130797A1
公开(公告)日：2008-06-05
申请号：US11566256
申请日：2006-12-04
IPC分类号： H04L27/06
CPC分类号： H04B1/7113 , H04B1/7117 , H04B1/712 , H04B2201/709727
摘要： Signal processing delays are selected from a candidate set in a wireless receiver based on both present and past channel behavior. According to one embodiment, a subset of signal processing delays are selected for received signal processing by accumulating a history of periodic delay selection computations for a candidate set of signal processing delays during a time interval. The delay selection calculations are based on cross-correlations between different ones of the signal processing delays. At the end of the time interval, a subset of the signal processing delays are selected from the candidate set of delays for received signal processing based on the history of delay selection computations.
摘要翻译： 基于现在和过去的信道行为，从无线接收机中的候选集中选择信号处理延迟。 根据一个实施例，通过在时间间隔期间累积用于信号处理延迟的候选组的周期性延迟选择计算的历史来选择信号处理延迟的子集用于接收信号处理。 延迟选择计算基于不同信号处理延迟之间的互相关。 在时间间隔结束时，基于延迟选择计算的历史，从用于接收信号处理的候选延迟集中选择信号处理延迟的子集。
-
公开(公告)号：US06775340B1
公开(公告)日：2004-08-10
申请号：US09687500
申请日：2000-10-13
IPC分类号： H04L700
CPC分类号： H04L25/0236 , H04B2201/70701 , H04L7/04 , H04L25/03337
摘要： A mobile communications system receiver has improved synchronization and channel estimation for receiving a transmitted signal passing through a radio channel. A processor receives and samples the transmitted signal for a plurality of timing hypotheses. A channel estimator hypothesizes unknown symbols at a pilot cluster of the sampled signal and estimates the radio channel of the pilot cluster for each hypothesized symbol sequence. The estimator determines an error corresponding to each hypothesized symbol sequence using the sampled signal, the estimated radio channel and the hypothesized symbols and determines actual timing estimates and actual radio channel estimates by selecting the radio channel estimates associated with the hypothesized symbols and the timing and hypothesis that minimizes the error.
摘要翻译： 移动通信系统接收机具有改进的同步和信道估计，用于接收通过无线电信道的发射信号。 处理器接收并采样所发送的信号用于多个定时假设。 信道估计器假设在采样信号的导频簇处的未知符号，并且针对每个假设的符号序列估计导频簇的无线电信道。 估计器使用采样信号，估计无线电信道和假设符号来确定与每个假设符号序列相对应的误差，并且通过选择与假设符号相关联的无线电信道估计以及时间和假设来确定实际的定时估计和实际的无线电信道估计 这最小化了错误。
-
63.发明授权Method and apparatus for digital symbol detection using medium response estimates 有权使用介质响应估计的数字符号检测方法和装置公开(公告)号：US06603827B2
公开(公告)日：2003-08-05
申请号：US09769995
申请日：2001-01-25
IPC分类号： H04B169
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.
摘要翻译： 根据本发明，利用脉冲整形的知识，传输介质对所发送的信息符号的影响与其他效果（例如与接收和发射滤波器相关的效果）分开估计。 然后使用介质响应估计来检测信息符号。 以前，接收机已经使用复合信道的估计来检测符号。 然而，这是假设不相关的噪音，并不总是这样。
-
64.发明授权System and methods for selecting an appropriate detection technique in a radiocommunication system 失效在无线电通信系统中选择合适的检测技术的系统和方法公开(公告)号：US06333953B1
公开(公告)日：2001-12-25
申请号：US08897309
申请日：1997-07-21
IPC分类号： H03K900
CPC分类号： H04L25/03006 , H04L25/02
摘要： Techniques for adapting detection schemes used in receivers for receiving radio signals are described. The received signal is processed to determine, for example, an amount of time dispersion present in the radio channel. Based on this determination an appropriate detection scheme is selected for detecting the transmitted symbols. Various techniques for determining the dispersive or non-dispersive nature of the channel are described.
摘要翻译： 描述用于适应用于接收无线电信号的接收机中使用的检测方案的技术。 处理接收到的信号以确定例如存在于无线电信道中的时间色散量。 基于该确定，选择适当的检测方案来检测所发送的符号。 描述了用于确定通道的分散性或非分散性的各种技术。
-
65.发明授权Multiple access coding using bent sequences for mobile radio communications 失效使用用于移动无线电通信的弯曲序列的多址接入编码
公开(公告)号：US5550809A
公开(公告)日：1996-08-27
申请号：US291693
申请日：1994-08-16
申请人： Gregory E. Bottomley , Paul W. Dent
发明人： Gregory E. Bottomley , Paul W. Dent
IPC分类号： H04Q7/38 , H01J13/00 , H04B1/707 , H04J11/00 , H04J13/00 , H04J13/12 , H04J13/16 , H04L1/00 , H04L1/02 , H04L9/00 , H04L9/18
CPC分类号： H04L1/0057 , H04B1/707 , H04J13/00 , H04J13/0048 , H04J13/12 , H04J13/004 , H04J13/16 , H04L2209/04 , H04L2209/34
摘要： Information symbols spread using orthogonal or bi-orthogonal codewords are assigned a unique scramble mask that is taken from a set of scramble masks having selected correlation properties. The set of scramble masks is selected such that the correlation between the modulo-2 sum of two scramble masks with any codeword is a constant magnitude, independent of the codeword and the individual masks being compared. In one embodiment, when any two masks are summed using modulo-2 arithmetic, the Walsh transformation of that sum results in a maximally flat Walsh spectrum. For cellular radio telephone systems using subtractive CDMA demodulation techniques, a two-tier ciphering system ensures security at the cellular system level by using a pseudorandomly generated code key to select one of the scramble masks common to all of the mobile stations in a particular cell. Also, privacy at the individual mobile subscriber level is ensured by using a pseudorandomly generated ciphering key to encipher individual information signals before the scrambling operation.
摘要翻译： 使用正交或双正交码字扩展的信息符号被分配为从具有所选相关属性的一组加扰掩码取得的唯一加扰掩码。 选择这组加扰掩码，使得两个加扰掩模与任何码字的模2之和之间的相关性是恒定的量级，与码字和被比较的各个掩码无关。 在一个实施例中，当使用模2算术对任何两个掩模求和时，该和的沃尔什变换导致最大平均沃尔什频谱。 对于使用减法CDMA解调技术的蜂窝无线电话系统，双层加密系统通过使用伪随机生成的代码密钥来选择在特定小区中的所有移动站公共的加密掩码之一来确保蜂窝系统级的安全性。 此外，通过在加扰操作之前使用伪随机生成的加密密钥来加密各个信息信号来确保个人移动用户级别的隐私。
-
公开(公告)号：US09226249B2
公开(公告)日：2015-12-29
申请号：US12513972
申请日：2006-11-07
CPC分类号： H04W52/60 , H04B1/712 , H04B2201/709727 , H04W52/241
摘要： The present invention relates to a receiver comprising a fast power control unit, said fast power control unit being arranged to continuously control a quality measure of a radio channel. The receiver is characterized in that the quality measure is a modified Signal to Interference plus noise ratio (SIR) in which the influence from self interference has been removed. The invention further relates to a method for continuously controlling a quality measure of a radio channel, wherein a modified Signal to Interference plus noise ratio (SIR) is continuously determined in which the influence from self interference has been removed.
摘要翻译： 本发明涉及包括快速功率控制单元的接收机，所述快速功率控制单元被布置成连续地控制无线电信道的质量测量。 接收机的特征在于，质量测量是修改的信号与干扰加噪声比（SIR），其中已经去除了自身干扰的影响。 本发明还涉及一种用于连续地控制无线电信道的质量测量的方法，其中连续地确定修改的信号与干扰加噪声比（SIR），其中已经去除了自身干扰的影响。
-
67.发明授权Method and apparatus for detecting a plurality of symbol blocks using a decoder 有权用于使用解码器检测多个符号块的方法和装置公开(公告)号：US08605829B2
公开(公告)日：2013-12-10
申请号：US12729414
申请日：2010-03-23
CPC分类号： H04L25/03286 , H04B2201/709727 , H04L1/0047 , H04L25/03178 , H04L25/03229 , H04L25/03331 , H04L2025/03426
摘要： Teachings presented herein offer improved symbol block detection by including a decoder unit in a demodulation system. Utilizing a decoder unit in a demodulation system can significantly enhance symbol block detection because the decoder can produce bit likelihood values (soft bit values), and these bit likelihood values can be used to construct a set of candidate symbol values. Advantageously, this set of candidate symbol values is more likely to contain the actually transmitted symbol(s) than if the decoder unit was not used in the demodulation system.
摘要翻译： 本文提出的教学通过在解调系统中包括解码器单元来提供改进的符号块检测。 在解调系统中使用解码器单元可以显着增强符号块检测，因为解码器可以产生位似然值（软比特值），并且这些比特似然值可以用于构建一组候选符号值。 有利地，与在解调系统中不使用解码器单元相比，这组候选符号值更可能包含实际发送的符号。
-
公开(公告)号：US08102950B2
公开(公告)日：2012-01-24
申请号：US12058082
申请日：2008-03-28
IPC分类号： H04L27/06
CPC分类号： H04J13/00 , H04B1/7105 , H04J13/102 , H04L25/03057 , H04L25/067 , H04L2025/0342
摘要： Where two or more multi-valued digital data symbols are modulated so that they overlap after passing through a channel, forming a combined signal, a receiver receives the combined signal and forms detection statistics to attempt to recover the symbols. Where forming detection statistics does not completely separate the symbols, each statistic comprises a different mix of the symbols. A receiver determines the symbols which, when mixed in the same way, reproduce or explain the statistics most closely. For example, the receiver hypothesizes all but one of the symbols and subtracts the effect of the hypothesized symbols from the mixed statistics. The remainders are combined and quantized to the nearest value of the remaining symbol. For each hypothesis, the remaining symbol is determined. A metric is then computed for each symbol hypothesis including the so-determined remaining symbol, and the symbol set producing the best metric is chosen as the decoded symbols.
摘要翻译： 当调制两个或更多个多值数字数据符号以使得它们在通过信道之后重叠时，形成组合信号，接收器接收组合信号并形成检测统计信息以尝试恢复符号。 在形成检测统计信息不完全分离符号的情况下，每个统计量包括符号的不同混合。 接收者确定在以相同的方式混合时，最接近地重现或解释统计信息的符号。 例如，接收方假设除符号之外的所有符号，并从混合统计中减去假设符号的影响。 余数被组合并量化为剩余符号的最接近的值。 对于每个假设，确定剩余符号。 然后针对包括所确定的剩余符号的每个符号假设计算度量，并且选择产生最佳度量的符号集作为解码符号。
-
公开(公告)号：US08046657B2
公开(公告)日：2011-10-25
申请号：US11451724
申请日：2006-06-13
IPC分类号： H03M13/45
CPC分类号： H03M13/05 , H03M13/11 , H03M13/255
摘要： According to a method and apparatus taught herein, a decoding circuit and method decode linear block codes based on determining joint probabilities for one or more related subsets of bits in received data blocks. The use of joint probabilities enables faster and more reliable determination of received bits, meaning that, for example, joint probability decoding requires fewer decoding iterations than a comparable decoding process based on single-bit probabilities. As a non-limiting example, the decoding circuit and method taught herein provide advantageous operation with Low Density Parity Check (LDPC) codes, and can be incorporated in a variety of communication systems and devices, such as those associated with wireless communication networks.
摘要翻译： 根据本文教导的方法和装置，解码电路和方法基于确定接收数据块中一个或多个相关的比特子集的联合概率来解码线性块码。 联合概率的使用使得能够更快更可靠地确定接收到的比特，这意味着例如，联合概率解码比基于单比特概率的可比较的解码过程需要更少的解码迭代。 作为非限制性示例，本文教导的解码电路和方法提供了具有低密度奇偶校验（LDPC）码的有利操作，并且可以并入各种通信系统和设备中，诸如与无线通信网络相关联的通信系统和设备。
-
70.发明申请METHOD AND APPARATUS FOR DETECTING A PLURALITY OF SYMBOL BLOCKS USING A DECODER 有权用于使用解码器检测多个符号块的方法和装置公开(公告)号：US20110129043A1
公开(公告)日：2011-06-02
申请号：US12729414
申请日：2010-03-23
IPC分类号： H04L27/06
CPC分类号： H04L25/03286 , H04B2201/709727 , H04L1/0047 , H04L25/03178 , H04L25/03229 , H04L25/03331 , H04L2025/03426
摘要： Teachings presented herein offer improved symbol block detection by including a decoder unit in a demodulation system. Utilizing a decoder unit in a demodulation system can significantly enhance symbol block detection because the decoder can produce bit likelihood values (soft bit values), and these bit likelihood values can be used to construct a set of candidate symbol values. Advantageously, this set of candidate symbol values is more likely to contain the actually transmitted symbol(s) than if the decoder unit was not used in the demodulation system.
摘要翻译： 本文提出的教学通过在解调系统中包括解码器单元来提供改进的符号块检测。 在解调系统中使用解码器单元可以显着增强符号块检测，因为解码器可以产生位似然值（软比特值），并且这些比特似然值可以用于构建一组候选符号值。 有利地，与在解调系统中不使用解码器单元相比，这组候选符号值更可能包含实际发送的符号。
-
-
-
-
-
-
-
-
-
搜索结果
159 条记录 (耗时 0.034 秒)
