公开(公告)号：US20070111664A1

公开(公告)日：2007-05-17

申请号：US11621307

申请日：2007-01-09

申请人： Jeffrey Levin ,  Thomas Wilborn ,  Brian Butler ,  Paul Bender

发明人： Jeffrey Levin ,  Thomas Wilborn ,  Brian Butler ,  Paul Bender

IPC分类号： H04B1/00 ,  H04B17/00

CPC分类号： H04B1/7107 ,  H04B2201/70701

摘要： Techniques for canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence to provide the estimated pilot interference. The pilot interference estimates due to all interfering multipaths are combined to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.

摘要翻译： 用于在无线（例如CDMA）通信系统中消除导频干扰的技术。 在一种方法中，最初处理包括多个信号实例（每个包括导频）的接收信号以提供数据样本。 每个信号实例的导频干扰可以通过用信号实例的扩展序列解扩数据样本来估计，对解扩数据进行信道化以提供导频符号，对导频符号进行滤波以估计信号实例的信道响应，并将估计信道 响应与扩展序列提供估计的导频干扰。 由于所有干扰多径导致的导频干扰估计被组合以导出总导频干扰，其从数据样本中减去以提供导频取消的数据样本。 然后处理这些样本以便为接收信号中的至少一个（期望的）信号实例中的每一个导出解调数据。

公开(公告)号：US20060007895A1

公开(公告)日：2006-01-12

申请号：US11173504

申请日：2005-06-30

申请人： Alessandro Coralli ,  Henry Pfister ,  Jilei Hou ,  John Smee ,  Roberto Padovani ,  Brian Butler ,  Jeffrey Levin ,  Thomas Wilborn ,  Paul Bender

发明人： Alessandro Coralli ,  Henry Pfister ,  Jilei Hou ,  John Smee ,  Roberto Padovani ,  Brian Butler ,  Jeffrey Levin ,  Thomas Wilborn ,  Paul Bender

IPC分类号： H04B7/216

CPC分类号： H04B1/7107 ,  H04B2201/70701

摘要： Methods and systems for estimating and canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence. The pilot interference estimates due to a plurality of interfering multipaths are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.

公开(公告)号：US20050013350A1

公开(公告)日：2005-01-20

申请号：US10921428

申请日：2004-08-17

申请人： Alessandro Coralli ,  Henry Pfister ,  Jilei Hou ,  John Smee ,  Roberto Padovani ,  Brian Butler ,  Jeffrey Levin ,  Thomas Wilborn ,  Paul Bender

发明人： Alessandro Coralli ,  Henry Pfister ,  Jilei Hou ,  John Smee ,  Roberto Padovani ,  Brian Butler ,  Jeffrey Levin ,  Thomas Wilborn ,  Paul Bender

IPC分类号： H04B1/707

CPC分类号： H04B1/7107 ,  H04B2201/70701

摘要： Methods and systems for estimating and canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence. The pilot interference estimates due to a plurality of interfering multipaths are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.

摘要翻译： 用于估计和消除无线（例如，CDMA）通信系统中的导频干扰的方法和系统。 在一种方法中，最初处理包括多个信号实例（每个包括导频）的接收信号以提供数据样本。 每个信号实例的导频干扰可以通过用信号实例的扩展序列解扩数据样本来估计，对解扩数据进行信道化以提供导频符号，对导频符号进行滤波以估计信号实例的信道响应，并将估计信道 响应与扩展序列。 由多个干扰多径导致的导频干扰估计被累加以导出总导频干扰，其从数据样本中减去以提供导频取消的数据采样。 然后处理这些样本以便为接收信号中的至少一个（期望的）信号实例中的每一个导出解调数据。

公开(公告)号：US20050038843A1

公开(公告)日：2005-02-17

申请号：US10945617

申请日：2004-09-20

申请人： Judith LaRocca ,  A. Irvine ,  Jeffrey Levin

发明人： Judith LaRocca ,  A. Irvine ,  Jeffrey Levin

IPC分类号： G06F15/00 ,  H03M20060101 ,  H04N1/32 ,  H04N1/41 ,  H04N7/12

CPC分类号： G06F17/147 ,  H04N19/436 ,  H04N19/44 ,  H04N19/625

摘要： An apparatus to determine the inverse transform of a block of encoded data the block of encoded data comprising a plurality of compressed frequency domain data elements. An input register is configured to receive a predetermined quantity of data elements. At least one butterfly processor is coupled to the input register and is configured to perform at least one mathematical operation on selected pairs of data elements to produce an output of processed data elements. At least one intermediate register is coupled to the butterfly processor and configured to temporarily store the processed data. A feedback loop is coupled to the intermediate register and the butterfly processor, and where if enabled, is configured to transfer a first portion of processed data elements to the appropriate butterfly processor to perform additional mathematical operations and where if disabled, is configured to transfer a second portion of processed data elements to at least one holding register.

摘要翻译： 一种用于确定编码数据块的逆变换的装置，包括多个压缩频域数据元素的编码数据块。 输入寄存器被配置为接收预定量的数据元素。 至少一个蝶形处理器耦合到输入寄存器，并且被配置为对所选择的数据元素对执行至少一个数学运算，以产生经处理的数据元素的输出。 至少一个中间寄存器耦合到蝶形处理器并且被配置为临时存储经处理的数据。 反馈回路耦合到中间寄存器和蝶形处理器，并且其中如果允许，则被配置为将经处理的数据元素的第一部分传送到适当的蝶形处理器以执行附加的数学运算，并且如果被禁用则被配置为传送 处理的数据元素的第二部分到至少一个保持寄存器。

公开(公告)号：US08064494B2

公开(公告)日：2011-11-22

申请号：US10447631

申请日：2003-05-28

申请人： Daniel R. Kindred ,  Jeffrey Levin ,  Steven J. Halter

发明人： Daniel R. Kindred ,  Jeffrey Levin ,  Steven J. Halter

IPC分类号： H04B1/00 ,  H04L27/00 ,  H04L27/06

CPC分类号： H04B1/7117 ,  H04B2201/70707

摘要： Techniques for polling fingers on a channel (which are fingers for which symbols are to be combined) to determine the last finger on the channel. As each finger is polled, the polled finger compares its state information with the state information for the channel to determine whether or not it is the last finger on the channel. The polled finger may be deemed as the last finger if (1) the polled finger is the current last finger, (2) the polled finger is later than the current last finger, or (3) all fingers on the channel have been polled and none of the fingers indicated that it is the last finger. If the polled finger is deemed as the last finger then, (1) the channel state information is updated with the polled finger state information, and (2) the symbols provided by the polled finger may be marked as being ready for subsequent processing.

摘要翻译： 用于在通道（其是要组合符号的手指）上轮询手指以确定通道上的最后一个手指的技术。 当轮询每个手指时，被轮询的手指将其状态信息与通道的状态信息进行比较，以确定其是否是通道上的最后一个手指。 （1）轮询的手指是当前的最后一根手指，（2）轮询的手指比当前的最后一根手指晚，或者（3）通道上的所有手指已被轮询，并且 手指都不指示它是最后一根手指。 如果被轮询的手指被认为是最后一个手指，则（1）通过轮询的手指状态信息来更新信道状态信息，以及（2）被轮询的手指提供的符号可被标记为准备好进行后续处理。