公开(公告)号：US20100177847A1

公开(公告)日：2010-07-15

申请号：US12377192

申请日：2007-09-19

申请人： Graeme K. Woodward

发明人： Graeme K. Woodward

IPC分类号： H04L25/03

CPC分类号： H04L27/2614

摘要： In one embodiment, an algorithm dynamically selects a method for reducing distortion in a multi-carrier modulated signal, such as an orthogonal frequency division multiplexing (OFDM) signal. The algorithm directs a transmitter to transmit peak-to-average power ratio (PAPR)-reduction signals over reserved tones (i.e., frequencies) if reserved tones are available. If reserved tones are not available, then the algorithm directs the transmitter to transmit PAPR-reduction symbols over free tones if free tones are available. If the free tones for this transmitter are used by adjacent transmitters, then interference-reduction techniques may be used to reduce interference with the adjacent transmitters. If reserved tones and free tones are not available, then the transmitter may use an alternative method to reduce distortion, such as successive clipping and filtering. In another embodiment, the transmitter may transmit PAPR-reduction symbols over both free and reserved tones, if available.

摘要翻译： 在一个实施例中，算法动态地选择减少诸如正交频分复用（OFDM）信号的多载波调制信号中的失真的方法。 如果保留的音调可用，该算法指示发射机在保留的音调（即，频率）上发射峰均功率比（PAPR） - 减小信号。 如果保留的音调不可用，则如果可用音调可用，则算法指示发射机在自由音调上发送PAPR减少符号。 如果该发射机的自由音由相邻发射机使用，则可以使用干扰减少技术来减少与相邻发射机的干扰。 如果保留的音调和自由音调不可用，则发射机可以使用替代方法来减少失真，例如连续的削波和滤波。 在另一个实施例中，如果可用，发射机可以在自由和保留的音调两者之间传送PAPR减少符号。

公开(公告)号：US20080075159A1

公开(公告)日：2008-03-27

申请号：US11731173

申请日：2007-03-30

申请人： Uwe Sontowski ,  Graeme K. Woodward

发明人： Uwe Sontowski ,  Graeme K. Woodward

IPC分类号： H03H7/40 ,  H03K5/159

CPC分类号： H04L25/03038 ,  H03H21/0012 ,  H03H2021/0092 ,  H04L2025/03617

摘要： In one embodiment, a receiver has a main equalizer and an auxiliary equalizer. The auxiliary equalizer equalizes a received signal using adaptively generated sets of auxiliary filter coefficients. Each set is generated by 1) filtering a received signal to generate an equalized signal, 2) calculating an error based on the equalized signal, and 3) calculating the set of coefficients based on the error and the prior set of auxiliary filter coefficients. The main equalizer equalizes a delayed version of the input signal by first applying a set of auxiliary filter coefficients, copied from the auxiliary equalizer, to the delayed version. Then, the main equalizer continues to equalize the delayed signal using main filter coefficients that are adaptively generated in a manner analogous to that of the auxiliary equalizer. In other embodiments, the number of sets of auxiliary filter coefficients and the period in which the sets are copied may vary.

摘要翻译： 在一个实施例中，接收器具有主均衡器和辅助均衡器。 辅助均衡器使用自适应生成的辅助滤波器系数组来均衡接收信号。 每个集合通过以下方式产生：1）对接收到的信号进行滤波以产生均衡信号，2）基于均衡信号计算误差，以及3）基于误差和先前的辅助滤波器系数集计算系数集合。 主均衡器通过首先将从辅助均衡器复制的一组辅助滤波器系数应用到延迟版本来均衡延迟版本的输入信号。 然后，主均衡器继续使用以类似于辅助均衡器的方式自适应地产生的主滤波器系数来均衡延迟信号。 在其他实施例中，辅助滤波器系数的集合数和集合被复制的周期可以变化。

公开(公告)号：US08351520B2

公开(公告)日：2013-01-08

申请号：US12377192

申请日：2007-09-19

申请人： Graeme K. Woodward

发明人： Graeme K. Woodward

IPC分类号： H04L27/28 ,  H04K1/10

CPC分类号： H04L27/2614

摘要： In one embodiment, an algorithm dynamically selects a method for reducing distortion in a multi-carrier modulated signal, such as an orthogonal frequency division multiplexing (OFDM) signal. The algorithm directs a transmitter to transmit peak-to-average power ratio (PAPR)-reduction signals over reserved tones (i.e., frequencies) if reserved tones are available. If reserved tones are not available, then the algorithm directs the transmitter to transmit PAPR-reduction symbols over free tones if free tones are available. If the free tones for this transmitter are used by adjacent transmitters, then interference-reduction techniques may be used to reduce interference with the adjacent transmitters. If reserved tones and free tones are not available, then the transmitter may use an alternative method to reduce distortion, such as successive clipping and filtering. In another embodiment, the transmitter may transmit PAPR-reduction symbols over both free and reserved tones, if available.

摘要翻译： 在一个实施例中，算法动态地选择减少诸如正交频分复用（OFDM）信号的多载波调制信号中的失真的方法。 如果保留的音调可用，该算法指示发射机在保留的音调（即，频率）上发射峰均功率比（PAPR） - 减小信号。 如果保留的音调不可用，则如果可用音调可用，则算法指示发射机在自由音调上发送PAPR减少符号。 如果该发射机的自由音由相邻发射机使用，则可以使用干扰减少技术来减少与相邻发射机的干扰。 如果保留的音调和自由音调不可用，则发射机可以使用替代方法来减少失真，例如连续的削波和滤波。 在另一个实施例中，如果可用，发射机可以在自由和保留的音调两者之间传送PAPR减少符号。

公开(公告)号：US08462839B2

公开(公告)日：2013-06-11

申请号：US13311654

申请日：2011-12-06

申请人： Rami Banna ,  Uwe Sontowski ,  Long Ung ,  Graeme K. Woodward

发明人： Rami Banna ,  Uwe Sontowski ,  Long Ung ,  Graeme K. Woodward

IPC分类号： H03H7/30

CPC分类号： H04L25/03044 ,  H04B1/7097 ,  H04L2025/03509 ,  H04L2025/03617 ,  H04L2025/03687

摘要： In one embodiment, a receiver has a reference generator and a main equalizer. The reference generator equalizes a received signal using one or more pilot reference signals. Then, the reference generator decodes one or more predetermined data channels of the equalized signal, makes hard decisions on the data of each decoded channel, and regenerates the original coding sequence of each decoded channel. The main equalizer uses each re-encoded channel as an additional reference signal along with one or more pilot signals to equalize a time-delayed version of the received signal. In alternative embodiments, the receiver might also have a step-size generator which selects optimum step sizes from a look-up table based on the number of re-encoded channels and the power of those channels. The step size is then used by the main equalizer along with the re-encoded channels to equalize the time-delayed received signal.

摘要翻译： 在一个实施例中，接收器具有参考发生器和主均衡器。 参考发生器使用一个或多个导频参考信号来均衡接收信号。 然后，基准发生器解码均衡信号的一个或多个预定数据信道，对每个解码信道的数据作出硬判决，并重新生成每个解码信道的原始编码序列。 主均衡器使用每个重编码信道作为附加参考信号以及一个或多个导频信号来均衡接收信号的时间延迟版本。 在替代实施例中，接收机还可以具有步长生成器，其基于重新编码的信道的数量和这些信道的功率从查找表中选择最佳步长。 然后，主均衡器与重新编码的信道一起使用步长来均衡时间延迟的接收信号。

公开(公告)号：US20100177832A1

公开(公告)日：2010-07-15

申请号：US12377178

申请日：2007-09-19

申请人： Jayant Baliga ,  Alexander J. Grant ,  Adriel P. Kind ,  Graeme K. Woodward

发明人： Jayant Baliga ,  Alexander J. Grant ,  Adriel P. Kind ,  Graeme K. Woodward

IPC分类号： H04K1/10

CPC分类号： H04L27/2614

摘要： In one embodiment, the present invention is a method for reducing the peak-to-average power ratio (PAPR) of a multi-carrier modulated symbol, such as an orthogonal frequency division multiplexed (OFDM) symbol. The method first transforms a set of data symbols into a multi-carrier modulated symbol. The method then uses the multi-carrier modulated symbol and a gradient-descent algorithm to generate a set of symbols for PAPR-reduction tones. The data symbols and the PAPR-reduction symbols are then transformed to generate an updated multi-carrier modulated symbol. The PAPR-reduction symbols are iteratively updated until a terminating condition occurs (e.g., an acceptable PAPR is achieved for the multi-carrier modulated symbol). In another embodiment, the method uses the multi-carrier modulated symbol generated in the first step and a gradient-descent algorithm to generate an updated multi-carrier modulated symbol directly, where the need for transforming the data symbols and the PAPR-reduction symbols is eliminated for subsequent iterations.

摘要翻译： 在一个实施例中，本发明是一种降低诸如正交频分复用（OFDM）符号的多载波调制符号的峰均功率比（PAPR）的方法。 该方法首先将一组数据符号变换为多载波调制符号。 该方法然后使用多载波调制符号和梯度下降算法来生成用于PAPR降低音调的一组符号。 然后对数据符号和PAPR减小符号进行变换以产生更新的多载波调制符号。 PAPR减少符号被迭代地更新，直到终止条件发生（例如，对于多载波调制符号实现可接受的PAPR）。 在另一个实施例中，该方法使用在第一步骤中生成的多载波调制符号和梯度下降算法直接生成更新的多载波调制符号，其中需要变换数据符号和PAPR减少符号是 消除后续迭代。

公开(公告)号：US20090296798A1

公开(公告)日：2009-12-03

申请号：US12295683

申请日：2007-04-05

申请人： Rami Banna ,  Mark A. Bickerstaff ,  Matthew E. Cooke ,  Adriel P. kind ,  Yi-Chen Li ,  Oliver Ridler ,  Uwe Sontowski ,  Charles N. A. Thomas ,  Long Ung ,  Koen Van den Beld ,  Benjamin J. Widdup ,  Graeme K. Woodward ,  Dominic Wing-Kin Yip ,  Gongyu Zhou

发明人： Rami Banna ,  Mark A. Bickerstaff ,  Matthew E. Cooke ,  Adriel P. kind ,  Yi-Chen Li ,  Oliver Ridler ,  Uwe Sontowski ,  Charles N. A. Thomas ,  Long Ung ,  Koen Van den Beld ,  Benjamin J. Widdup ,  Graeme K. Woodward ,  Dominic Wing-Kin Yip ,  Gongyu Zhou

IPC分类号： H03H7/40 ,  H04W4/00

CPC分类号： H04B1/70754 ,  H04B1/7097 ,  H04B2201/70701 ,  H04L25/03057 ,  H04L25/03292 ,  H04L2025/03617 ,  H04L2025/03687

摘要： In one embodiment, an HSDPA co-processor for 3GPP Release 6 Category 8 (7.2 Mb/s) HSDPA that provides all chip-rate, symbol-rate, physical-channel, and transport-channel processing for HSDPA in 90 nm CMOS. The co-processor design is scalable to all HSDPA data rates up to 14 Mb/s. The coprocessor implements an Advanced Receiver based on an NLMS equalizer, supports RX diversity and TX diversity, and provides up to 6.4 dB better performance than a typical single-antenna rake receiver. Thus, 3GPP R6 HSDPA functionality can be added to a legacy R99 modem using an HSDPA co-processor consistent with embodiments of the present invention, at a reasonable incremental cost and power.

摘要翻译： 在一个实施例中，用于3GPP版本6类别（7.2Mb / s）HSDPA的HSDPA协处理器为90nm CMOS中的HSDPA提供所有芯片速率，符号速率，物理信道和传输信道处理。 协处理器设计可扩展到高达14 Mb / s的所有HSDPA数据速率。 协处理器基于NLMS均衡器实现高级接收机，支持RX分集和TX分集，并且比典型的单天线耙式接收机提供高达6.4 dB的性能。 因此，3GPP R6 HSDPA功能可以以合理的增量成本和功率被添加到与本发明实施例一致的HSDPA协处理器的传统R99调制解调器。

公开(公告)号：US08175179B2

公开(公告)日：2012-05-08

申请号：US12377178

申请日：2007-09-19

申请人： Jayant Baliga ,  Alexander J. Grant ,  Adriel P. Kind ,  Graeme K. Woodward

发明人： Jayant Baliga ,  Alexander J. Grant ,  Adriel P. Kind ,  Graeme K. Woodward

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2614

摘要： In one embodiment, the present invention is a method for reducing the peak-to-average power ratio (PAPR) of a multi-carrier modulated symbol, such as an orthogonal frequency division multiplexed (OFDM) symbol. The method first transforms a set of data symbols into a multi-carrier modulated symbol. The method then uses the multi-carrier modulated symbol and a gradient-descent algorithm to generate a set of symbols for PAPR-reduction tones. The data symbols and the PAPR-reduction symbols are then transformed to generate an updated multi-carrier modulated symbol. The PAPR-reduction symbols are iteratively updated until a terminating condition occurs (e.g., an acceptable PAPR is achieved for the multi-carrier modulated symbol). In another embodiment, the method uses the multi-carrier modulated symbol generated in the first step and a gradient-descent algorithm to generate an updated multi-carrier modulated symbol directly, where the need for transforming the data symbols and the PAPR-reduction symbols is eliminated for subsequent iterations.

摘要翻译： 在一个实施例中，本发明是一种降低诸如正交频分复用（OFDM）符号的多载波调制符号的峰均功率比（PAPR）的方法。 该方法首先将一组数据符号变换为多载波调制符号。 该方法然后使用多载波调制符号和梯度下降算法来生成用于PAPR降低音调的一组符号。 然后对数据符号和PAPR减小符号进行变换以产生更新的多载波调制符号。 PAPR减少符号被迭代地更新，直到终止条件发生（例如，对于多载波调制符号实现可接受的PAPR）。 在另一个实施例中，该方法使用在第一步骤中生成的多载波调制符号和梯度下降算法直接生成更新的多载波调制符号，其中需要变换数据符号和PAPR减少符号是 消除后续迭代。

公开(公告)号：US20120076194A1

公开(公告)日：2012-03-29

申请号：US13311654

申请日：2011-12-06

申请人： Rami Banna ,  Uwe Sontowski ,  Long Ung ,  Graeme K. Woodward

发明人： Rami Banna ,  Uwe Sontowski ,  Long Ung ,  Graeme K. Woodward

IPC分类号： H04L27/01

CPC分类号： H04L25/03044 ,  H04B1/7097 ,  H04L2025/03509 ,  H04L2025/03617 ,  H04L2025/03687

摘要： In one embodiment, a receiver has a reference generator and a main equalizer. The reference generator equalizes a received signal using one or more pilot reference signals. Then, the reference generator decodes one or more predetermined data channels of the equalized signal, makes hard decisions on the data of each decoded channel, and regenerates the original coding sequence of each decoded channel. The main equalizer uses each re-encoded channel as an additional reference signal along with one or more pilot signals to equalize a time-delayed version of the received signal. In alternative embodiments, the receiver might also have a step-size generator which selects optimum step sizes from a look-up table based on the number of re-encoded channels and the power of those channels. The step size is then used by the main equalizer along with the re-encoded channels to equalize the time-delayed received signal.

摘要翻译： 在一个实施例中，接收器具有参考发生器和主均衡器。 参考发生器使用一个或多个导频参考信号来均衡接收信号。 然后，基准发生器解码均衡信号的一个或多个预定数据信道，对每个解码信道的数据作出硬判决，并重新生成每个解码信道的原始编码序列。 主均衡器使用每个重编码信道作为附加参考信号以及一个或多个导频信号来均衡接收信号的时间延迟版本。 在替代实施例中，接收机还可以具有步长生成器，其基于重新编码的信道的数量和这些信道的功率从查找表中选择最佳步长。 然后，主均衡器与重新编码的信道一起使用步长来均衡时间延迟的接收信号。

公开(公告)号：US20090080506A1

公开(公告)日：2009-03-26

申请号：US12158388

申请日：2007-01-10

申请人： Rami Banna ,  Uwe Sontowski ,  Long Ung ,  Graeme K. Woodward

发明人： Rami Banna ,  Uwe Sontowski ,  Long Ung ,  Graeme K. Woodward

IPC分类号： H04L27/01

CPC分类号： H04L25/03044 ,  H04B1/7097 ,  H04L2025/03509 ,  H04L2025/03617 ,  H04L2025/03687

摘要： In one embodiment, a receiver has a reference generator and a main equalizer. The reference generator equalizes a received signal using one or more pilot reference signals. Then, the reference generator decodes one or more predetermined data channels of the equalized signal, makes hard decisions on the data of each decoded channel, and regenerates the original coding sequence of each decoded channel. The main equalizer uses each re-encoded channel as an additional reference signal along with one or more pilot signals to equalize a time-delayed version of the received signal. In alternative embodiments, the receiver might also have a step-size generator which selects optimum step sizes from a look-up table based on the number of re-encoded channels and the power of those channels. The step size is then used by the main equalizer along with the re-encoded channels to equalize the time-delayed received signal.

摘要翻译： 在一个实施例中，接收器具有参考发生器和主均衡器。 参考发生器使用一个或多个导频参考信号来均衡接收信号。 然后，基准发生器解码均衡信号的一个或多个预定数据信道，对每个解码信道的数据作出硬判决，并重新生成每个解码信道的原始编码序列。 主均衡器使用每个重编码信道作为附加参考信号以及一个或多个导频信号来均衡接收信号的时间延迟版本。 在替代实施例中，接收机还可以具有步长生成器，其基于重新编码的信道的数量和这些信道的功率从查找表中选择最佳步长。 然后，主均衡器与重新编码的信道一起使用步长来均衡时间延迟的接收信号。

公开(公告)号：US20080069197A1

公开(公告)日：2008-03-20

申请号：US11782845

申请日：2007-07-25

申请人： Adriel P. Kind ,  Graeme K. Woodward

发明人： Adriel P. Kind ,  Graeme K. Woodward

IPC分类号： H03K5/159

CPC分类号： H04L25/03038 ,  H04L2025/03426 ,  H04L2025/03477 ,  H04L2025/03605

摘要： In one embodiment, an equalizer equalizes two versions of a signal that are received through separate propagation paths, to generate one equalized signal. The equalizer comprises a single FIR filter and an NLMS updater. During each iteration, the NLMS updater supplies a set of coefficients to the FIR filter. The FIR filter processes samples of both the first and second versions by multiplying each sample by one coefficient in the set of coefficients to generate a number of products. The products are combined by a summation block to generate an equalized sample. The equalized sample is compared to a reference signal to generate an error measure used to update the set of coefficients. The samples of the received versions are then advanced and this process is repeated to generate further equalized samples. In further embodiments, the equalizer may process more than two versions of a signal.

摘要翻译： 在一个实施例中，均衡器均衡通过单独传播路径接收的信号的两个版本，以产生一个均衡的信号。 均衡器包括单个FIR滤波器和NLMS更新器。 在每次迭代期间，NLMS更新器向FIR滤波器提供一组系数。 FIR滤波器通过将每个样本乘以系数集合中的一个系数来生成多个产品，来处理第一和第二版本的样本。 产品通过求和块组合以生成均衡样本。 将均衡的采样与参考信号进行比较，以产生用于更新系数集合的误差测量。 然后，接收到的版本的样本被提前，并重复该过程以产生进一步的均衡样本。 在另外的实施例中，均衡器可以处理多于两个版本的信号。