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公开(公告)号：US20090213922A1
公开(公告)日：2009-08-27
申请号：US12058082
申请日：2008-03-28
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。
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公开(公告)号：US20090190485A1
公开(公告)日：2009-07-30
申请号：US12022346
申请日：2008-01-30
申请人： Hakan Bjorkegren , Gregory E. Bottomley , Christer Edholm , Ning He , Jing Rao , Claes Tidestav
发明人： Hakan Bjorkegren , Gregory E. Bottomley , Christer Edholm , Ning He , Jing Rao , Claes Tidestav
IPC分类号： H04L1/00
CPC分类号： H04W52/241 , H04W52/12 , H04W52/146
摘要： A method and apparatus for controlling the transmit power of a mobile device in a mobile communication network takes the level of self-interference into account to perform inner-loop power control. For normal inner-loop power control, a signal quality estimate is compared to a signal quality target and power control commands are generated based on the comparison. When self-interference is the dominant impairment in the received signal, a “fast break” is introduced to change inner-loop power control command generation.
摘要翻译： 用于控制移动通信网络中的移动设备的发射功率的方法和装置考虑自干扰水平以执行内环功率控制。 对于正常的内环功率控制，将信号质量估计与信号质量目标进行比较，并且基于比较生成功率控制命令。 当自干扰是接收信号的主要损害时，引入“快断”来改变内环功率控制命令的产生。
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93.发明授权公开(公告)号：US07539240B2
公开(公告)日：2009-05-26
申请号：US10800167
申请日：2004-03-12
IPC分类号： H04B15/00
CPC分类号： H04B1/712 , H04B2201/709727
摘要： Exemplary received signal processing may be based on maintaining a model of received signal impairment correlations, wherein each term of the model is updated periodically or as needed based on measuring impairments for a received signal of interest. An exemplary model comprises an interference impairment term scaled by a first model fitting parameter, and a noise impairment term scaled by a second model fitting parameters. The model terms may be maintained based on current channel estimates and delay information and may be fitted to measured impairment by adapting the model fitting parameters based on the measured impairment. The modeled received signal impairment correlations may be used to compute RAKE combining weights for received signal processing, or to compute Signal-to-Interference (SIR) estimates. Combined or separate models may be used for multiple received signals. As such, the exemplary modeling is extended to soft handoff, multiple antennas, and other diversity situations.
摘要翻译： 示例性的接收信号处理可以基于维持接收信号损害相关的模型，其中基于感兴趣的接收信号的测量损伤，模型的每个项被周期性地或根据需要更新。 示例性模型包括由第一模型拟合参数缩放的干扰损害项和由第二模型拟合参数缩放的噪声损伤项。 模型条款可以根据当前的渠道估计和延迟信息进行维护，并且可以通过根据测量的损失调整模型拟合参数来适应测量的损益。 建模的接收信号损害相关可用于计算接收信号处理的RAKE组合权重，或用于计算信号与干扰（SIR）估计。 组合或分离的模型可用于多个接收信号。 因此，示例性建模被扩展到软切换，多个天线和其他分集情况。
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公开(公告)号：US20080291978A1
公开(公告)日：2008-11-27
申请号：US11751109
申请日：2007-05-21
CPC分类号： H04B1/712 , H04B7/0634 , H04B2201/709727
摘要： A parametric form of G-Rake and chip equalization for closed-loop transmit diversity is provided, that accounts for impairment correlation between transmit antennas. In a closed-loop transmit diversity system, the base station transmits a signal from two or more antennas, using one of a predetermined set of relative phase offsets at one of the antennas. The parametric estimation of the impairment or data covariance is performed by summing terms, including a term for each possible phase offset. The terms are weighted by fitting parameters. The fitting parameters are jointly solved by fitting the impairment or data covariance estimate to a measured impairment or data covariance. In another aspect, a measured impairment covariance is formed by exploiting a special relationship between the pilot channels of the different transmit antennas.
摘要翻译： 提供了用于闭环发射分集的G-Rake和码片均衡的参数形式，其考虑了发射天线之间的损害相关性。 在闭环发射分集系统中，基站使用在天线之一处的预定相对相位偏移集合中的一个从两个或多个天线发射信号。 损伤或数据协方差的参数估计是通过求和术语来执行的，包括每个可能的相位偏移的项。 这些术语通过拟合参数加权。 拟合参数通过将损伤或数据协方差估计拟合为测量的损伤或数据协方差来共同解决。 在另一方面，通过利用不同发射天线的导频信道之间的特殊关系来形成测量的损害协方差。
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95.发明授权Method and apparatus for canceling interference from high power, high data rate signals 有权消除高功率，高数据速率信号干扰的方法和装置公开(公告)号：US07389099B2
公开(公告)日：2008-06-17
申请号：US11112578
申请日：2005-04-22
IPC分类号： H04B1/18
CPC分类号： H04B1/7107 , H04B2201/709727
摘要： A method and apparatus in a radio receiver for canceling interference from a high power, high data rate signal received in a combined signal that includes a contribution from the high power signal and a contribution from a lower power signal. It is first determined whether the high power signal was correctly received. A CRC checksum may be used to determine whether the high power signal was received with a good reliability. Thereafter, the contribution of the high power signal is removed from the received signal only if the high power signal was correctly received. The contribution of the high power signal may be removed by hard-subtracting the contribution of the high power signal from the received signal if all of the bits of the checksum are correct, and soft-subtracting the contribution of the high power signal from the received signal if most, but not all, of the bits in the checksum are correct.
摘要翻译： 一种无线电接收机中的方法和装置，用于消除在包括来自高功率信号的贡献和来自低功率信号的贡献的组合信号中接收的高功率，高数据速率信号的干扰。 首先确定高功率信号是否正确接收。 可以使用CRC校验和来确定高功率信号是否以良好的可靠性被接收。 此后，仅当正确接收到高功率信号时，才从接收信号中去除高功率信号的贡献。 如果校验和的所有比特都正确，则可以通过从接收到的信号中硬减去高功率信号的贡献来消除高功率信号的贡献，并且从所接收到的功率信号中减去高功率信号的贡献 信号，如果校验和中的大多数但不是全部的位是正确的。
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96.发明申请Method and apparatus for interference estimation in a Generalized Rake receiver 有权广义耙式接收机中干扰估计的方法和装置公开(公告)号：US20080002759A1
公开(公告)日：2008-01-03
申请号：US11479483
申请日：2006-06-30
CPC分类号： H04B1/712 , H04B2201/709727
摘要： According to one embodiment taught herein, a method of determining impairment correlations between a plurality of delays of interest for a received CDMA signal comprises generating kernel functions as samples of a net channel response of the received CDMA signal taken at defined chip sampling phases for delay differences between the plurality of delays of interest. In a parametric Generalized Rake (G-Rake) receiver embodiment, the delays of interest represent the delay positions of the fingers being used to characterized received signal. In a chip equalizer receiver embodiment, the delays of interest represent the delay positions of the equalizer taps. The method continues with determining impairment correlations based on convolving the kernel functions. Corresponding receiver circuits, including an impairment correlation estimation circuit configured for parametric G-Rake operation, may be implemented in a variety of communication devices and systems, such as in wireless communication network base stations and mobile stations.
摘要翻译： 根据本文教导的一个实施例，确定接收的CDMA信号的多个感兴趣延迟之间的损害相关性的方法包括：生成内核函数，作为在限定的码片采样相位处采用的接收CDMA信号的净信道响应的样本，用于延迟差 在多个感兴趣的延迟之间。 在参数广义耙（G-Rake）接收机实施例中，感兴趣的延迟表示用于指定的接收信号的手指的延迟位置。 在码片均衡器接收器实施例中，感兴趣的延迟表示均衡器抽头的延迟位置。 该方法继续确定基于卷积核函数的损害相关性。 包括配置用于参数G-Rake操作的损害相关估计电路的对应的接收器电路可以在诸如无线通信网络基站和移动站中的各种通信设备和系统中实现。
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97.发明授权公开(公告)号：US07142581B2
公开(公告)日：2006-11-28
申请号：US09800143
申请日：2001-03-06
IPC分类号： H04B15/00
CPC分类号： H04L1/0015 , H04B1/713 , H04B7/2621 , H04L1/0001 , H04L1/0003 , H04L1/0009
摘要： Methods and systems for selecting a frequency hopping mode for a communication in a communication system having a plurality of transmission schemes are provided. One of the plurality of transmission schemes to be used for the communication is determined. One of a plurality of candidate frequency hopping modes is selected as the frequency hopping mode for the communication based on the determined transmission scheme for the communication. Methods and systems for transmitting a communication packet in a communication system having a plurality of transmission schemes are also provided.
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公开(公告)号：US06922434B2
公开(公告)日：2005-07-26
申请号：US09845950
申请日：2001-04-30
IPC分类号： H04B1/7117 , H04B1/712 , H04B1/69
CPC分类号： H04B1/712 , H04B1/7117 , H04B2201/709727
摘要： Methods of recovering information encoded in a spread spectrum signal transmitted according to a spreading sequence in a communications medium are provided in which a spread spectrum signal is received from the communications medium and correlated with a spreading sequence to produce a plurality of time-offset correlations. Some of these time-offset correlations may be designed to cancel out known interfering signals. A subset of the plurality of time-offsets may then be selected, and corresponding traffic correlations may then be combined using a weighted combination to estimate information encoded in the transmitted spread spectrum signal. Receivers for implementing these methods are also provided.
摘要翻译： 提供了恢复在通信介质中根据扩展序列发送的扩频信号中编码的信息的方法，其中从通信介质接收扩频信号并与扩展序列相关联以产生多个时间偏移相关。 这些时间偏移相关中的一些可被设计为消除已知的干扰信号。 然后可以选择多个时间偏移的子集，然后可以使用加权组合来组合对应的业务相关性，以估计在所发送的扩展频谱信号中编码的信息。 还提供了实现这些方法的接收器。
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公开(公告)号：US06917629B1
公开(公告)日：2005-07-12
申请号：US09152063
申请日：1998-09-11
CPC分类号： H04L1/0038 , H04L1/0013 , H04L1/0046 , H04L1/0054 , H04L1/0061 , H04L1/08
摘要： An improved system and method for rate detection of transmitted signals is disclosed for use in a IS-95 CDMA downlink. For each speech frame, one of four possible bit rates is used to encode the frame according to the standard. The present invention describes a receiver and various processes that are able to detect which rate was sent without the aid of flag bits or other mode indication information. According to various embodiments of the invention different rate detection processes which can exploit additional code information, such as CRC checks and convolutional coding, are disclosed.
摘要翻译： 公开了用于IS-95 CDMA下行链路中的用于传输信号的速率检测的改进的系统和方法。 对于每个语音帧，四种可能的比特率之一用于根据标准对帧进行编码。 本发明描述了一种接收机和能够检测哪个速率被发送而不借助于标志位或其他模式指示信息的各种过程。 根据本发明的各种实施例，公开了可以利用附加码信息（诸如CRC校验和卷积编码）的不同速率检测过程。
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100.发明授权公开(公告)号：US06842479B2
公开(公告)日：2005-01-11
申请号：US09992094
申请日：2001-11-05
申请人： Gregory E. Bottomley
发明人： Gregory E. Bottomley
IPC分类号： H04B1/10 , H04B1/707 , H04B1/7095 , H04B1/7113 , H04B1/712 , H04B7/005 , H04B7/02 , H04L25/02 , H04L25/03 , H04L27/30
CPC分类号： H04B1/712 , H04B1/7095 , H04B1/7113 , H04B2201/70701 , H04L25/0204 , H04L25/0328 , H04L25/03299 , H04L25/03337
摘要： Systems and methods for despreading received spread spectrum signals are described. Despreading can be performed using both channel estimates and impairment correlation estimates. Techniques for selecting delays of interest are also described, along with a despreading mechanism which saves power by operating only on delays of interest.
摘要翻译： 描述了用于解扩接收扩频信号的系统和方法。 可以使用信道估计和损伤相关估计来执行解扩。 还描述了用于选择感兴趣的延迟的技术，以及解扩机制，其通过仅在感兴趣的延迟上操作来节省功率。
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