公开(公告)号：US08213526B2

公开(公告)日：2012-07-03

申请号：US11955526

申请日：2007-12-13

申请人： Tracy L. Fulghum

发明人： Tracy L. Fulghum

IPC分类号： H04B7/02

CPC分类号： H04L25/0232 ,  H04L27/2647 ,  H04L2025/03426

摘要： A receive station of the present invention despreads a received signal over both long and short despreading periods to determine individual channel estimates over each symbol period of an extended period for multiple pilot signals. As a result, the present invention provides channel estimates sufficient for both slow and fast fading conditions. The receive station determines an average channel estimate for each of the pilot signals over the extended period by despreading the received signal over the extended period using mutually orthogonal extended spreading sequences. The receive station further determines a combined channel estimate for the pilot signals over each symbol period of the extended period by despreading the received signal over each symbol period using a common spreading sequence. Based on the average and combined channel estimates, the receive station determines individual channel estimates for each pilot signal over each symbol period of the extended period.

摘要翻译： 本发明的接收站通过长和短去扩频周期对接收到的信号进行解扩，以确定针对多个导频信号的延长周期的每个符号周期的各个信道估计。 结果，本发明提供了足够用于慢速和快速衰落条件的信道估计。 接收站通过使用相互正交的扩展扩展序列在延长的周期内对扩展的接收信号进行解扩，来确定延长的周期中的每个导频信号的平均信道估计。 接收站还通过使用公共扩展序列在每个符号周期上对接收信号进行解扩，来确定延长时段的每个符号周期上的导频信号的组合信道估计。 基于平均和组合的信道估计，接收站在延长的周期的每个符号周期上确定每个导频信号的个体信道估计。

公开(公告)号：US20090257477A1

公开(公告)日：2009-10-15

申请号：US12103145

申请日：2008-04-15

申请人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy L. Fulghum

发明人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy L. Fulghum

IPC分类号： H04B1/707 ,  H04B1/10 ,  H04L27/01

CPC分类号： H04B1/7105 ,  H04B1/71072 ,  H04B1/712 ,  H04B2201/709727

摘要： Methods and apparatus for processing a composite communication signal comprising two or more received signals of interest are disclosed. An interference-suppressing receiver, which may comprise a G-Rake receiver or a linear chip equalizer, utilizes a square-root covariance matrix in processing received signals, where the square-root covariance matrix represents impairment covariance or data covariance for the composite communication signal. In an exemplary method, a receiver detects symbols, corresponding to a signal of interest, from the composite communication signal, using processing weights calculated from a square-root covariance matrix and a net channel response for the signal of interest. The method further comprises calculating a reconstructed version of the signal of interest from the detected first symbols, generating an updated communication signal by subtracting the reconstructed version of the first signal of interest from the composite communication signal, and updating the square-root covariance matrix to obtain an updated square-root covariance matrix.

摘要翻译： 公开了用于处理包括两个或更多个所关注的信号的复合通信信号的方法和装置。 可以包括G-Rake接收机或线性码片均衡器的干扰抑制接收机在处理接收信号中使用平方根协方差矩阵，其中平方根协方差矩阵表示复合通信信号的损害协方差或数据协方差 。 在一种示例性方法中，接收机使用从平方根协方差矩阵计算的处理权重和感兴趣信号的净信道响应，从复合通信信号中检测与感兴趣信号相对应的符号。 该方法还包括从检测到的第一符号计算感兴趣信号的重构版本，通过从复合通信信号中减去感兴趣的第一信号的重构版本，并将平方根协方差矩阵更新为 获得更新的平方根协方差矩阵。

公开(公告)号：US20090154576A1

公开(公告)日：2009-06-18

申请号：US11955526

申请日：2007-12-13

申请人： Tracy L. Fulghum

发明人： Tracy L. Fulghum

IPC分类号： H04K1/10

CPC分类号： H04L25/0232 ,  H04L27/2647 ,  H04L2025/03426

摘要： A receive station of the present invention despreads a received signal over both long and short despreading periods to determine individual channel estimates over each symbol period of an extended period for multiple pilot signals. As a result, the present invention provides channel estimates sufficient for both slow and fast fading conditions. The receive station determines an average channel estimate for each of the pilot signals over the extended period by despreading the received signal over the extended period using mutually orthogonal extended spreading sequences. The receive station further determines a combined channel estimate for the pilot signals over each symbol period of the extended period by despreading the received signal over each symbol period using a common spreading sequence. Based on the average and combined channel estimates, the receive station determines individual channel estimates for each pilot signal over each symbol period of the extended period.

摘要翻译： 本发明的接收站通过长和短去扩频周期对接收到的信号进行解扩，以确定针对多个导频信号的延长周期的每个符号周期的各个信道估计。 结果，本发明提供了足够用于慢速和快速衰落条件的信道估计。 接收站通过使用相互正交的扩展扩展序列在延长的周期内对扩展的接收信号进行解扩，来确定延长的周期中的每个导频信号的平均信道估计。 接收站还通过使用公共扩展序列在每个符号周期上对接收信号进行解扩，来确定延长时段的每个符号周期上的导频信号的组合信道估计。 基于平均和组合的信道估计，接收站在延长的周期的每个符号周期上确定每个导频信号的个体信道估计。

公开(公告)号：US07221958B2

公开(公告)日：2007-05-22

申请号：US10021378

申请日：2001-12-12

申请人： Tracy L. Fulghum ,  William O. Camp, Jr. ,  Rajaram Ramesh ,  Yi-Pin Eric Wang

发明人： Tracy L. Fulghum ,  William O. Camp, Jr. ,  Rajaram Ramesh ,  Yi-Pin Eric Wang

IPC分类号： H04M1/00

CPC分类号： H03H17/0225

摘要： A delay-and-add filtering technique positions one or more filter nulls substantially at points of narrowband interference in a relatively wideband received signal. For example, the technique is useful in removing adjacent channel interference in a received W-CDMA signal caused GSM radio transmissions.

摘要翻译： 延迟和加法滤波技术基本上在相对宽带接收信号中的窄带干扰点处定位一个或多个滤波器零点。 例如，该技术在去除所接收到的W-CDMA信号造成的GSM无线电传输中的相邻信道干扰方面是有用的。

公开(公告)号：US5691979A

公开(公告)日：1997-11-25

申请号：US625474

申请日：1996-03-29

申请人： Jimmy W. Cadd ,  Tracy L. Fulghum

发明人： Jimmy W. Cadd ,  Tracy L. Fulghum

IPC分类号： H04B1/7156 ,  H04J4/00 ,  H04J13/00 ,  H04L1/16 ,  H04L12/28 ,  H04B1/713

CPC分类号： H04J13/00 ,  H04B1/7156 ,  H04J4/00 ,  H04B2001/71563 ,  H04L1/1685 ,  H04W24/10 ,  H04W4/06 ,  H04W72/0453 ,  H04W76/02 ,  H04W84/10

摘要： A signaling protocol for an infrastructureless short range communication system uses slow frequency hopping compatible with the industrial/scientific/medical (ISM) frequency spectrum. The signaling protocol utilizes a multi-tiered structure having an acknowledgment request frame (200), ping frame (300), connect frame (400) and voice frame (500). These frames are used to determine an appropriate allocation of frequency spectrum from an initiating station (11') to at least one other non-initiating station (11). The signaling protocol allows an initiating station (11') to rapidly identify other stations (11) within a talk group (13) and resolve actual and/or potential collisions to establish clear and reliable infrastructureless communication.

摘要翻译： 用于无基础设施的短距离通信系统的信令协议使用与工业/科学/医疗（ISM）频谱兼容的慢跳频。 信令协议使用具有确认请求帧（200），ping帧（300），连接帧（400）和语音帧（500）的多层结构。 这些帧用于确定从发起站（11'）到至少一个其他非发起站（11）的频谱的适当分配。 信令协议允许发起站（11'）快速识别通话组（13）内的其他站（11）并且解决实际和/或潜在的冲突以建立清晰和可靠的无基础架构通信。

公开(公告)号：US20090304132A1

公开(公告)日：2009-12-10

申请号：US12133636

申请日：2008-06-05

申请人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Andreas Cedergren ,  Tracy L. Fulghum ,  Elias Jonsson

发明人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Andreas Cedergren ,  Tracy L. Fulghum ,  Elias Jonsson

IPC分类号： H04B7/10

CPC分类号： H04B1/7117 ,  H04B1/712

摘要： Methods and apparatus for determining an impairment covariance matrix for use in an interference-suppressing CDMA receiver are disclosed. In several of the disclosed embodiments, precise information regarding signal propagation delays is not needed. An exemplary method includes the selection of a plurality of processing delays for processing a received CDMA signal. Net channel coefficients for the processing delays are estimated and used to calculate an impairment covariance matrix. The impairment covariance matrix is calculated as a function of the estimated net channel coefficients and the processing delays, without estimating a propagation medium channel response for the received signal.

摘要翻译： 公开了用于确定用于干扰抑制CDMA接收机的损害协方差矩阵的方法和装置。 在所公开的几个实施例中，不需要关于信号传播延迟的精确信息。 一种示例性方法包括选择用于处理所接收的CDMA信号的多个处理延迟。 用于处理延迟的净通道系数被估计并用于计算损害协方差矩阵。 损伤协方差矩阵作为估计的净通道系数和处理延迟的函数计算，而不估计接收信号的传播介质通道响应。

公开(公告)号：US07590167B2

公开(公告)日：2009-09-15

申请号：US11215584

申请日：2005-08-30

申请人： Tracy L. Fulghum ,  Douglas A. Cairns

发明人： Tracy L. Fulghum ,  Douglas A. Cairns

IPC分类号： H04B1/00

CPC分类号： H04B1/712 ,  H04B2201/709727

摘要： A wireless communication device includes a Generalized RAKE (G-RAKE) receiver circuit that is configured to determine a traffic-to-pilot gain scaling parameter as part of the impairment correlation determination process that underlies (G-RAKE) combining weight generation. In this manner, the receiver circuit conveniently and accurately accounts for gain differences between the pilot channel of a received CDMA signal, as used for channel estimation, and the traffic channel(s) of the CDMA signal, which carry received data to be recovered. The gain difference accounting enables proper demodulation of amplitude-modulated traffic signals. By way of non-limiting example, such gain scaling may be used for demodulating/decoding High Speed Downlink Packet Access (HSDPA) signals used in Wideband Code Division Multiple Access (W-CDMA) systems.

摘要翻译： 无线通信设备包括广义RAKE（G-RAKE）接收器电路，其被配置为确定作为组合权重生成（G-RAKE）的基础的损害相关确定过程的一部分的业务到引导增益缩放参数。 以这种方式，接收机电路方便且准确地考虑了用于信道估计的接收的CDMA信号的导频信道与携带接收的要恢复的数据的CDMA信号的业务信道之间的增益差。 增益差计算能够对幅度调制的交通信号进行适当的解调。 作为非限制性示例，这种增益缩放可以用于解调/解码在宽带码分多址（W-CDMA）系统中使用的高速下行链路分组接入（HSDPA）信号。

公开(公告)号：US20090154531A1

公开(公告)日：2009-06-18

申请号：US11954460

申请日：2007-12-12

申请人： Tracy L. Fulghum

发明人： Tracy L. Fulghum

IPC分类号： H04B1/707

CPC分类号： H04B1/712 ,  H04B1/711 ,  H04B2201/709727

摘要： In a parametric G-Rake receiver, a method an apparatus computes initial estimates of one or more scaling parameters and initial combining weights for the parametric G-Rake receiver; estimates the SINR of a received signal based on a mean pilot symbol estimate and the initial combining weights; computes revised estimates for one or more scaling parameters based on the estimated SINR and the initial combining weights; and computes revised combining weights based on one or more revised scaling parameter estimates.

摘要翻译： 在参数G-Rake接收机中，方法和装置计算参数G-Rake接收机的一个或多个缩放参数和初始组合权重的初始估计; 基于平均导频符号估计和初始组合权重来估计接收信号的SINR; 基于估计的SINR和初始组合权重计算一个或多个缩放参数的修正估计; 并且基于一个或多个修正的缩放参数估计来计算修改的组合权重。

公开(公告)号：US07539240B2

公开(公告)日：2009-05-26

申请号：US10800167

申请日：2004-03-12

申请人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang ,  Tracy L. Fulghum ,  Elias Jonsson

发明人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang ,  Tracy L. Fulghum ,  Elias Jonsson

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。

公开(公告)号：US20080152053A1

公开(公告)日：2008-06-26

申请号：US11613677

申请日：2006-12-20

申请人： Tracy L. Fulghum ,  Stephen J. Grant

发明人： Tracy L. Fulghum ,  Stephen J. Grant

IPC分类号： H04L1/02 ,  H04B7/10

CPC分类号： H04B7/0854 ,  H04B1/7103 ,  H04B2201/709727

摘要： According to a method and apparatus taught herein, the computation of intermediate combining weights considers impairment correlations common to two received signal streams, but does not account for cross-stream interference attributable to channel reuse between the two streams. Excluding consideration of channel reuse cross-stream interference from the computation of intermediate combining weights simplifies intermediate combining weight computation and increases computational robustness. Further, final combining weights, such as for Generalized Rake combining or equalization combining, may be obtained efficiently from the intermediate combining weights through the use of weight scaling factors, which do account for channel reuse cross-stream interference. Moreover, in at least some instances, the intermediate combining weights are of interest. For example, signal quality estimates for one or both streams may be computed from the corresponding intermediate combining weights.

摘要翻译： 根据本文教导的方法和装置，中间组合权重的计算考虑了两个接收信号流共同的损害相关，但不考虑归因于两个流之间的信道重用的交叉流干扰。 从中间组合权重的计算中排除对信道复用交叉串扰的考虑，简化了中间组合权重计算，提高了计算的鲁棒性。 此外，可以通过使用考虑到信道重用串流干扰的权重缩放因子从中间组合权重有效地获得诸如用于广义Rake组合或均衡组合的最终组合权重。 此外，在至少一些情况下，中间组合权重是令人感兴趣的。 例如，可以从相应的中间组合权重计算一个或两个流的信号质量估计。