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1. 发明授权

US06674820B1 Receiver devices, systems and methods for receiving communication signals subject to colored noise 有权
标题翻译：用于接收有色噪声的通信信号的接收机设备，系统和方法
公开(公告)号：US06674820B1
公开(公告)日：2004-01-06
申请号：US09504216
申请日：2000-02-15
申请人： Dennis Hui , Kambiz C. Zangi , Rajarem Ramesh
发明人： Dennis Hui , Kambiz C. Zangi , Rajarem Ramesh
IPC分类号： H03D104
CPC分类号： H04L25/03993 , H04L25/0224 , H04L25/025
摘要： Methods, systems and receiver devices are provided which may provide improved receiver performance in obtaining estimates of the complex-valued baseband channel in the presence of colored baseband noise. In various embodiments of the present invention, systems and methods are provided in which, over each synchronization signal period or other determinate information window, the channel coefficients and the color of the baseband noise are concurrently estimated. Thus, both the channel coefficients and the color of the noise are estimated, rather than assuming white noise, and channel coefficients may be provided that account for the color of the noise These estimates may be provided for each burst of a communication and may result in an improved channel estimate in the presence of colored noise. The baseband noise can become colored due to, for example, having a non-Nyquist receive filter, due to the presence of a colored co-channel interferer, or due to the presence of an adjacent channel interferer. The concurrent estimates of the color of the noise and channel coefficients may be provided iteratively or by selection of a best result among a plurality of candidate noise color assumptions.
摘要翻译：提供了方法，系统和接收机设备，其可以在有色基带噪声的存在下提供改进的接收机性能来获得复值基带信道的估计。在本发明的各种实施例中，提供了系统和方法，其中通过每个同步信号周期或其他确定信息窗口，同时估计信道系数和基带噪声的颜色。因此，估计信道系数和噪声的颜色，而不是假设白噪声，并且可以提供考虑噪声颜色的信道系数。可以为通信的每个突发提供这些估计，并且可以导致在存在彩色噪声的情况下改进的信道估计。由于存在着色的同频道干扰源，或者由于相邻信道干扰源的存在，由于例如具有非奈奎斯特接收滤波器，基带噪声可能变色。可以迭代地提供噪声和信道系数的颜色的并发估计，或者通过在多个候选噪声颜色假设中选择最佳结果来提供。

2. 发明授权

US06385260B1 Asynchronous sampling digital detection (ASDD) methods and apparatus 失效
标题翻译：异步采样数字检测（ASDD）方法和装置
公开(公告)号：US06385260B1
公开(公告)日：2002-05-07
申请号：US09161049
申请日：1998-09-25
申请人： Charles B. Gamble , Uri Rogers
发明人： Charles B. Gamble , Uri Rogers
IPC分类号： H03D104
CPC分类号： H04L25/068 , G11B20/24
摘要： Asynchronous sampling digital detection (ASDD) methods and apparatus are described. In one embodiment, noise-corrupted information is received and comprises a plurality of information-carrying events which encode binary information which is desired to be retrieved. A plurality of values are extracted from the noise-corrupted information-carrying events which are representative of the encoded binary information. An amount of noise corruption carried by one of these plurality of values is estimated by considering an amount of noise corruption carried by another of the plurality of values. Responsive to the estimation of the noise corruption, the one value is then modified. In another embodiment, noise-corrupted information is received comprising a plurality of information-carrying events which encode binary information which is desired to be retrieved. A plurality of values from the noise-corrupted information-carrying events are determined which are representative of the encoded binary information. A set of conditions is defined which are a function of the plurality of values, and which have value-dependent outcomes. For a given determined value of the plurality of values, a value-dependent outcome is imposed to produce at least two intermediate noise-adjusted values. Using the two intermediate noise-adjusted values, a noise-reduced output value for the given determined value is selected.
摘要翻译：描述了异步采样数字检测（ASDD）方法和装置。在一个实施例中，接收到噪声损坏的信息，并且包括编码要被检索的二进制信息的多个信息携带事件。从代表编码的二进制信息的噪声损坏的信息携带事件中提取多个值。通过考虑多个值中的另一个所携带的噪声损坏的量来估计由这些多个值之一携带的噪声损耗量。响应于噪声损坏的估计，该值被修改。在另一个实施例中，接收到噪声损坏的信息，包括编码要被检索的二进制信息的多个信息携带事件。确定来自噪声破坏的信息携带事件的多个值代表编码的二进制信息。定义一组条件，这些条件是多个值的函数，并且具有依赖于价值的结果。对于给定的多个值的确定值，施加依赖于值的结果以产生至少两个中间噪声调整值。使用两个中间噪声调整值，选择给定确定值的噪声降低输出值。

3. 发明授权

US06320918B1 Procedure for reducing interference in the transmission of an electrical communication signal 失效
标题翻译：降低电通信信号传输干扰的步骤
公开(公告)号：US06320918B1
公开(公告)日：2001-11-20
申请号：US09133830
申请日：1998-08-13
申请人： Michael Walker , Hans Jürgen Matt , Michael Trompf
发明人： Michael Walker , Hans Jürgen Matt , Michael Trompf
IPC分类号： H03D104
CPC分类号： G10L21/0208 , H04L25/03019
摘要： Through crosstalk on lines, interference from current transmission lines or line echoes, the useable signal is superimposed by different interference signals. The task is to find a procedure for reducing interference which, compared to the current state of the art, can be achieved with a smaller amount of computing input and is suited to both the reduction of quasi steady-state and non-steady interference. In this, the interference of a received signal is classified with regards to characteristics in the time range as a click, crackle, rumble or noise interference signal. The time range in which the interference occurs is marked. Depending on the interference type, interference blanking and/or an interpolation of the useable signal and/or a subtraction of the interference signal from the useable signal and/or a regeneration of the useable signal is carried out.
摘要翻译：通过线路上的串扰，来自当前传输线路或线路回波的干扰，可用信号由不同的干扰信号叠加。任务是找到一种减少干扰的过程，与目前的现有技术相比，可以用更少量的计算输入来实现干扰，并且适用于准稳态和非稳态干扰的降低。在此，接收信号的干扰在时间范围内被分类为点击，裂纹，隆隆声或噪声干扰信号。发生干扰的时间范围被标记。根据干扰类型，执行干扰消隐和/或可用信号的内插和/或可用信号的干扰信号的减法和/或可用信号的再生。

4. 发明授权

US06314146B1 Peak to average power ratio reduction 失效
标题翻译：峰均功率比降低
公开(公告)号：US06314146B1
公开(公告)日：2001-11-06
申请号：US09092327
申请日：1998-06-05
申请人： Jose Tellado , John M. Cioffi
发明人： Jose Tellado , John M. Cioffi
IPC分类号： H03D104
CPC分类号： H04L27/2623 , H04L27/2626 , H04L27/2647
摘要： The present inventions provide methods and systems for reducing the peak to average power ratio of a multi-carrier signal. Reducing the peak to average power ratio of a signal ensures that amplifiers and transmitters are not saturated, causing loss of data. Further, reducing peak to average power ratios reduces the consumption of power during transmission. Peak to average power ratios is reduced by clipping an original signal at transmission. A receiver receives the clipped signal and makes an estimate of the clipped portions of the signal. Using iterative estimations an approximation is made of the clipped portions of the signal. The approximation of the clipped portions of the signal is used to estimate the original signal. The clipped signal reduces the peak to average power ratio of the transmitted signal, and estimation avoids the need for sending side information in order to decode the clipped signal.
摘要翻译：本发明提供了用于降低多载波信号的峰均功率比的方法和系统。降低信号的峰值与平均功率比确保放大器和发射器不饱和，造成数据丢失。此外，降低峰值与平均功率比降低了传输期间的功率消耗。通过在传输时剪切原始信号来降低峰值与平均功率比。接收器接收限幅信号并估计信号的限幅部分。使用迭代估计，对信号的限幅部分进行近似。使用信号的限幅部分的近似来估计原始信号。被削减的信号降低了发送信号的峰值与平均功率比，并且估计避免了发送侧信息以便解码限幅信号的需要。

5. 发明授权

US06233291B1 Method and apparatus for performing data sorting in a decoder 失效
标题翻译：用于在解码器中执行数据排序的方法和装置
公开(公告)号：US06233291B1
公开(公告)日：2001-05-15
申请号：US09113904
申请日：1998-07-10
申请人： Tzvi Shukhman , Avi Kliger , Amir Ilevitzky
发明人： Tzvi Shukhman , Avi Kliger , Amir Ilevitzky
IPC分类号： H03D104
CPC分类号： H04L25/03057 , H04L25/03267 , H04L25/4919
摘要： A vector decoder for detecting symbols transmitted along a communication channel is disclosed, as is a method for decoding symbols. The decoder includes at least two pairs of decision feedback equalizers and noise predictors operating on a plurality M of vectors of symbols being detected, a path storage unit, a metric determiner a sorter and a path builder. The vectors are ordered in accordance with quality levels and each noise predictor estimates the noise associated with its associated vector. The path storage unit stores M of the ordered vectors, each vector being of length L. The metric determiner is connected to the output of all of the decision feedback equalizers and the noise predictors and produces a performance metric for each of Q branches extending from each vector. Each branch is associated with one of Q possible symbol values. The sorter is connected to the output of the metric determiner and sorts data, formed of a) the symbol values and b) the vectors which they extend, in accordance with their performance metrics. The sorter also orders, from the M*Q performance metrics, the data having the M best performance metrics. The path builder is connected to the output of the sorter and associates the ordered data with the appropriate ones of the previously stored ordered vectors.
摘要翻译：公开了用于检测沿着通信信道发送的符号的向量解码器，用于对符号进行解码的方法。解码器包括至少两对判决反馈均衡器和噪声预测器，其对被检测的符号的多个向量进行操作，路径存储单元，度量确定器分类器和路径构建器。向量根据质量级别排序，并且每个噪声预测器估计与其相关矢量相关联的噪声。路径存储单元存储有序矢量的M，每个矢量的长度为L。度量确定器连接到所有判决反馈均衡器和噪声预测器的输出，并且产生从每个矢量延伸的每个Q分支的性能度量向量。每个分支与Q个可能的符号值之一相关联。分拣机连接到度量确定器的输出端，并根据其性能指标对由a）符号值和b）它们扩展的向量组成的数据进行排序。分拣机还从M * Q性能指标中订购具有M个最佳性能指标的数据。路径构建器连接到分拣机的输出端，并将有序数据与先前存储的有序向量中的相应数据相关联。

6. 发明授权

US06229858B1 Phaselock threshold correction 失效
标题翻译：锁相阈值校正
公开(公告)号：US06229858B1
公开(公告)日：2001-05-08
申请号：US09109308
申请日：1998-06-30
申请人： Donald R. Stephens , William Mosley, Jr.
发明人： Donald R. Stephens , William Mosley, Jr.
IPC分类号： H03D104
CPC分类号： H03L7/095 , H03G3/3052 , H04B1/1027
摘要： A noise estimator for threshold correction of a receiver includes a low pass filter to remove wideband noise from an input signal that includes a signal component and a noise component. The output of the wideband filter is applied to a square-law power detector having an output applied to an envelope detector. The output of the envelope detector is the instantaneous envelope of the input signal and is applied to a low pass filter to perform time averaging and is also applied to a differential network. The output of the low pass filter is a signal representing a time averaged statistical envelope representing the statistical mean of the instantaneous envelope of the input signal. This signal is also applied to the differential network that generates a signal representing the difference in the instantaneous envelope of the input signal and the time averaged statistical envelope signal. This difference signal is applied to a square-law power detector and then to a low pass filter for time averaging. An output of the low pass filter is a signal representing an estimate of the noise component of the input signal.
摘要翻译：用于接收机的阈值校正的噪声估计器包括低通滤波器，用于从包括信号分量和噪声分量的输入信号中去除宽带噪声。宽带滤波器的输出被应用于具有施加到包络检测器的输出的平方律功率检测器。包络检测器的输出是输入信号的瞬时包络，并且被施加到低通滤波器以执行时间平均，并且还应用于差分网络。低通滤波器的输出是表示表示输入信号的瞬时包络的统计平均值的时间平均统计包络的信号。该信号也被应用于差分网络，其产生表示输入信号的瞬时包络和时间平均的统计包络信号的差的信号。该差分信号被应用于平方律功率检测器，然后应用于低通滤波器以进行时间平均。低通滤波器的输出是表示输入信号的噪声分量的估计的信号。

7. 发明授权

US06219390B1 Adaptive interference canceller using digital control techniques 失效
标题翻译：自适应干扰消除器采用数字控制技术
公开(公告)号：US06219390B1
公开(公告)日：2001-04-17
申请号：US09063919
申请日：1998-04-21
申请人： G. N. Srinivasa Prasanna
发明人： G. N. Srinivasa Prasanna
IPC分类号： H03D104
CPC分类号： H04B1/1036
摘要： An adaptive interference canceller employing digital synthesis techniques and a digital to analog converter for eliminating narrow band RFI.
摘要翻译：采用数字合成技术的自适应干扰消除器和用于消除窄带RFI的数模转换器。

8. 发明授权

US06205190B1 System and method for reducing interference generated by a CDMA communications device 失效
标题翻译：用于减少由CDMA通信设备产生的干扰的系统和方法
公开(公告)号：US06205190B1
公开(公告)日：2001-03-20
申请号：US08639572
申请日：1996-04-29
申请人： Franklin Antonio , Robert D. Blakeney, II , Klein S. Gilhousen , Roy F. Quick
发明人： Franklin Antonio , Robert D. Blakeney, II , Klein S. Gilhousen , Roy F. Quick
IPC分类号： H03D104
CPC分类号： H04B15/00
摘要： A system and method for reducing the interference experienced by sensitive electronic devices, such as hearing aids, operative in the vicinity of CDMA user communication devices. A transmitter of the communications device is configured to transmit signal power substantially continuously at a full rate power level irrespective of the variable data rate at which the transmitter would otherwise be operative. In a first embodiment, a variable rate vocoder within the transmitter is directed to perform full-rate vocoding, irrespective of an instantaneous level of user speech. In a second embodiment, a microprocessor builds full-rate frames using repeated versions of code symbols generated by the vocoder. In a third embodiment, the microprocessor builds full rate frames by generating signaling bits of a predetermined pattern to pad otherwise non-full frames.
摘要翻译：一种用于减少在CDMA用户通信设备附近操作的敏感电子设备（例如助听器）所经历的干扰的系统和方法。通信设备的发射机被配置为以全速率功率电平基本上连续地发射信号功率，而与发射机否则可操作的可变数据速率无关。在第一实施例中，发射机内的可变速率声码器被引导以执行全速率声码，而与用户语音的瞬时级别无关。在第二实施例中，微处理器使用由声码器产生的代码符号的重复版本构建全速率帧。在第三实施例中，微处理器通过产生预定模式的信令比特来构建全速率帧，以填补非全帧。

9. 发明授权

US06829314B1 Adapter for near end crosstalk and echo canceller for bi-directional digital communications 有权
标题翻译：适用于近端串扰和回波消除器的双向数字通信
公开(公告)号：US06829314B1
公开(公告)日：2004-12-07
申请号：US09636047
申请日：2000-08-10
申请人： Anthony Eugene Zortea , Todd K. Moyer
发明人： Anthony Eugene Zortea , Todd K. Moyer
IPC分类号： H03D104
CPC分类号： H04B1/525
摘要： The invention is embodied in an adapter for use with a near end crosstalk (NEXT) canceller which reduces crosstalk, from a locally transmitted signal, in a locally received digital signal by superimposing, on the received signal, a correction signal comprising a sum of m largest time-delayed weighted and bandpass filtered samples of the transmitted signal spanning a range of n time delayed values, where m
摘要翻译：本发明体现在一种用于与近端串扰（NEXT）消除器一起使用的适配器，其通过在接收到的信号上叠加包括m的和的校正信号来减少本地接收的数字信号中的本地发送的信号的串扰发送信号的最大时间延迟加权和带通滤波样本跨越n个时间延迟值的范围，其中m

10. 发明授权

US06785351B1 Method and system for Doppler frequency estimation 有权
标题翻译：多普勒频率估计方法与系统
公开(公告)号：US06785351B1
公开(公告)日：2004-08-31
申请号：US09640316
申请日：2000-08-16
申请人： Robert Caiming Qiu
发明人： Robert Caiming Qiu
IPC分类号： H03D104
CPC分类号： H04L27/0014 , H04L25/0202 , H04L2027/0065
摘要： A method is provided for determining the Doppler frequency shift that occurs in the reception of a communication signal when the relative velocity between the transmitted and receiver is unknown. By estimating the channel characteristics and measuring the channel response to known transmitted data bits, a measure of the Doppler frequency is determined according to the method of the invention. In particular, a good estimate of the Doppler frequency shift is obtained based on a second order statistic of the fading process for the channel response to the known transmitted data bits. The approach is simple and general. It applies for any system such as WCDMA and CDMA 2000 when Doppler frequency is needed.
摘要翻译：提供了一种用于确定当发送和接收机之间的相对速度未知时在通信信号的接收中发生的多普勒频移的方法。通过估计信道特性并测量对已知发送数据比特的信道响应，根据本发明的方法确定多普勒频率的测量。具体地，基于对已知发送的数据比特的信道响应的衰落过程的二阶统计量，获得对多普勒频移的良好估计。这种方法简单而且一般。当需要多普勒频率时，它适用于任何系统，如WCDMA和CDMA 2000。

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