公开(公告)号：US06985535B2

公开(公告)日：2006-01-10

申请号：US10699015

申请日：2003-10-31

申请人： Young-Seo Park ,  Darrell J. Stogner

发明人： Young-Seo Park ,  Darrell J. Stogner

IPC分类号： H04K1/10

CPC分类号： H04L25/0232 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0226

摘要： A multi-carrier modulation communications system and method (100) for providing channel estimation that uses a transmitter for inserting pilot symbols in a digital multi-carrier modulated radio frequency (RF) signal and a receiver for receiving the pilot symbols in multi-carrier modulation RF signal. In order to provide channel estimation the receiver detects (101) channel power gains from a plurality of designated pilot symbols and calculates (103) both a speed parameter (S) and a multi-path parameter (M) for the channel receiving the pilot symbols. A channel model is then defined (105) based upon the speed parameter and multi-path parameter value and a predefined set of pilot coefficients is chosen (107) that substantially matches the channel model. The resulting set of pilot coefficients is then utilized (109) for optimizing pilot symbol interpolation.

摘要翻译： 一种多载波调制通信系统和方法（100），用于提供使用发射机在数字多载波调制射频（RF）信号中插入导频符号的信道估计和用于在多载波调制中接收导频符号的接收机 射频信号。 为了提供信道估计，接收机从多个指定的导频符号检测（101）信道功率增益，并计算（103）用于接收导频符号的信道的速度参数（S）和多径参数（M） 。 然后基于速度参数和多路径参数值定义（105）信道模型，并且选择基本上与信道模型匹配的预定义的导频系数集合（107）。 然后利用所得到的导频系数集合（109）来优化导频符号内插。

公开(公告)号：US08594590B2

公开(公告)日：2013-11-26

申请号：US12982989

申请日：2010-12-31

申请人： Young-Seo Park ,  Yadunandana N. Rao ,  Darrell J. Stogner

发明人： Young-Seo Park ,  Yadunandana N. Rao ,  Darrell J. Stogner

IPC分类号： H04B1/04

CPC分类号： H03F1/02 ,  H03F3/24 ,  H03F2200/435 ,  H03F2200/66 ,  H04L27/2623 ,  H04L27/2636

摘要： A method for controlling peak-to-average power ratio prior to amplification by a power amplifier is provided. The peak sample of a signal is predicted, window length is adjusted based on the peak width around the peak sample or subcarriers used to transmit the signal, and the window is subsequently used to clip the samples. A peak suppression window may be applied prior to predicting the peak sample when a set number of samples exceed a predetermined threshold. Window clipping may be deactivated if interference and throughput of the power amplifier is detrimentally affected. A pulse shaping filter may be optimized based on the window clipping to control transmitted signal characteristics. Various thresholds used in the prediction may be initially based on system design and power amplifier linearity and then dynamically adjusted based on an estimation of active subcarriers or of interferers present in the communication system.

摘要翻译： 提供了一种用于在功率放大器放大之前控制峰值与平均功率比的方法。 预测信号的峰值采样，基于用于发送信号的峰值采样或子载波周围的峰值宽度来调整窗口长度，并且窗口随后用于剪辑采样。 当设定数量的样本超过预定阈值时，可以在预测峰值采样之前应用峰值抑制窗口。 如果功率放大器的干扰和吞吐量受到不利影响，则可以禁用窗口削波。 可以基于窗口限幅来优化脉冲整形滤波器以控制发射信号特性。 预测中使用的各种阈值可以最初基于系统设计和功率放大器线性度，然后基于在通信系统中存在的活动子载波或干扰源的估计来动态调整。

公开(公告)号：US20120171975A1

公开(公告)日：2012-07-05

申请号：US12982989

申请日：2010-12-31

申请人： Young-Seo Park ,  Yadunandana N. Rao ,  Darrell J. Stogner

发明人： Young-Seo Park ,  Yadunandana N. Rao ,  Darrell J. Stogner

IPC分类号： H01Q11/12

CPC分类号： H03F1/02 ,  H03F3/24 ,  H03F2200/435 ,  H03F2200/66 ,  H04L27/2623 ,  H04L27/2636

摘要： A method for controlling peak-to-average power ratio prior to amplification by a power amplifier is provided. The peak sample of a signal is predicted, window length is adjusted based on the peak width around the peak sample or subcarriers used to transmit the signal, and the window is subsequently used to clip the samples. A peak suppression window may be applied prior to predicting the peak sample when a set number of samples exceed a predetermined threshold. Window clipping may be deactivated if interference and throughput of the power amplifier is detrimentally affected. A pulse shaping filter may be optimized based on the window clipping to control transmitted signal characteristics. Various thresholds used in the prediction may be initially based on system design and power amplifier linearity and then dynamically adjusted based on an estimation of active subcarriers or of interferers present in the communication system.

摘要翻译： 提供了一种用于在功率放大器放大之前控制峰值与平均功率比的方法。 预测信号的峰值采样，基于用于发送信号的峰值采样或子载波周围的峰值宽度来调整窗口长度，并且窗口随后用于剪辑采样。 当设定数量的样本超过预定阈值时，可以在预测峰值采样之前应用峰值抑制窗口。 如果功率放大器的干扰和吞吐量受到不利影响，则可以禁用窗口削波。 可以基于窗口限幅来优化脉冲整形滤波器以控制发射信号特性。 预测中使用的各种阈值可以最初基于系统设计和功率放大器线性度，然后基于在通信系统中存在的活动子载波或干扰源的估计来动态调整。

公开(公告)号：US07103106B2

公开(公告)日：2006-09-05

申请号：US10462327

申请日：2003-06-16

申请人： Young-Seo Park

发明人： Young-Seo Park

IPC分类号： H04L5/12

CPC分类号： H04L5/0062 ,  H04L25/03834 ,  H04L27/02 ,  H04L27/2082 ,  H04L27/2601 ,  H04L27/2631 ,  H04L27/2698 ,  H04L27/363

摘要： An improved multicarrier modulation system and method, which has the advantages of both isotropic orthogonal transfer algorithm orthogonal frequency division multiplexing (IOTA OFDM) and scalable advanced modulation (SAM), is introduced. The invention is root raised cosine (RRC) OFDM using the most spectrally efficient RRC filter without sacrificing the compact subchannel spacing of OFDM. The invention further provides an adjacent channel interference (ACI) suppression scheme and a modified RRC for better suppressing ACI of RRC OFDM. The ACI suppression scheme can also be applied to SAM with the modified RRC and to IOTA OFDM with a modified IOTA. The invention greatly improves a major problem of conventional OFDM namely ACI due to the use of a wide subchannel filter. Thus, the invention allows OFDM to meet even the strictest ACI requirements, which was not possible by using a conventional raised cosine windowing method.

摘要翻译： 引入了具有各向同性正交传输算法正交频分复用（IOTA OFDM）和可扩展高级调制（SAM）的优点的改进的多载波调制系统和方法。 本发明是使用最频谱有效的RRC滤波器的根升余弦（RRC）OFDM，而不牺牲OFDM的紧凑子信道间隔。 本发明还提供了相邻信道干扰（ACI）抑制方案和用于更好地抑制RRC OFDM的ACI的修改的RRC。 ACI抑制方案也可以用经修改的RRC和具有修改的IOTA的IOTA OFDM应用于SAM。 本发明大大改善了由于使用宽子信道滤波器而导致的常规OFDM即ACI的主要问题。 因此，本发明允许OFDM满足甚至最严格的ACI要求，这通过使用常规的升余弦加窗方法是不可能的。

公开(公告)号：US08971456B2

公开(公告)日：2015-03-03

申请号：US13329691

申请日：2011-12-19

申请人： Ariel L. Galan ,  Young-Seo Park ,  Charles H. Carter ,  Charles R. Ruelke ,  Darrell Stogner

发明人： Ariel L. Galan ,  Young-Seo Park ,  Charles H. Carter ,  Charles R. Ruelke ,  Darrell Stogner

IPC分类号： H04L27/06

CPC分类号： H04B1/0007 ,  H04B1/0071

摘要： A receiver for a wireless communication device provides a dual path receiver receiving first and second protocol-agnostic, uncorrelated receive signals simultaneously. The dual path receiver generating first and second offset IF signals from the simultaneously received first and second protocol-agnostic, uncorrelated receive signals. The receiver utilizes at least one converter for converting the first and second offset IF signals into at least one serial synchronous interface (SSI) signal representing the spectrum at IF. At least one processor receives the at least one SSI signal and applies parallel processing paths to demodulate the at least one SSI signal into separate baseband signals. The processor provides interference detection of, and level control for, the first and second offset IF signals.

摘要翻译： 用于无线通信设备的接收机提供双路径接收机同时接收第一和第二协议无关的，不相关的接收信号。 双路径接收机从同时接收的第一和第二协议无关的，不相关的接收信号产生第一和第二偏移IF信号。 接收机利用至少一个转换器将第一和第二偏移IF信号转换为表示IF处的频谱的至少一个串行同步接口（SSI）信号。 至少一个处理器接收所述至少一个SSI信号并且应用并行处理路径以将所述至少一个SSI信号解调为单独的基带信号。 处理器为第一和第二偏移IF信号提供干扰检测和电平控制。

公开(公告)号：US07382717B2

公开(公告)日：2008-06-03

申请号：US10954897

申请日：2004-09-30

申请人： Young-Seo Park

发明人： Young-Seo Park

IPC分类号： H04J11/00

CPC分类号： H04L27/2602 ,  H04L25/03834

摘要： An improved multicarrier modulation system and method is introduced which has the advantages of both isotropic orthogonal transfer algorithm orthogonal frequency division multiplexing (IOTA OFDM) and scalable advanced modulation (SAM). The invention reduces adjacent channel interference (ACI) in the multicarrier modulation system used in multicast systems by generating (2601) a spectrally efficient modified pulse for multicarrier modulation and then adapting (2605) the pulse at the edge of the subchannel for reducing the ACI product by the total multicarrier signal (2607). This BTRRC OFDM (2607) is an Offset OFDM with BTRRC pulse (2605) while the prior art RRC OFDM (604) is an Offset OFDM with RRC pulse (603). BTRRC OFDM has characteristics similar to RRC OFDM and has better power efficiency in simulcast or Nakagami fading environments where there is a timing error. Thus, BTRRC OFDM is desirable to substitute SAM in a simulcast environment.

摘要翻译： 引入了改进的多载波调制系统和方法，具有各向同性正交传输算法正交频分复用（IOTA OFDM）和可伸缩高级调制（SAM）的优点。 本发明通过生成（2601）用于多载波调制的频谱有效的修改脉冲，然后适应（2605）子信道边缘处的脉冲以减少ACI乘积来减少多播系统中使用的多载波调制系统中的相邻信道干扰（ACI） 通过总多载波信号（2607）。 该BTRRC OFDM（2607）是具有BTRRC脉冲的偏移OFDM（2605），而现有技术的RRC OFDM（604）是具有RRC脉冲的偏移OFDM（603）。 BTRRC OFDM具有类似于RRC OFDM的特征，并且在存在定时误差的同时播放或Nakagami衰落环境中具有更好的功率效率。 因此，BTRRC OFDM需要在同时播放环境中替代SAM。

公开(公告)号：US07453953B2

公开(公告)日：2008-11-18

申请号：US11142107

申请日：2005-06-01

申请人： Young-Seo Park ,  Lavanya Doblatyvenkata

发明人： Young-Seo Park ,  Lavanya Doblatyvenkata

IPC分类号： H04L25/09

CPC分类号： H04L27/361 ,  H04L27/2623

摘要： A system and a method to enlarge the minimum signal of a linear modulation signal (115) including multi-carrier modulation, such as Scalable advanced Modulation or Orthogonal Frequency Division Multiplexing, are disclosed. A minimum enlarger (120) exploits a simple amplitude limiter (220) so as not to interfere with an existing peak suppression scheme. The amplitude limiter (220) enlarges local minimum amplitude values to a predetermined minimum amplitude threshold if the local minimum amplitude values are less than the predetermined minimum amplitude threshold. While the amplitude limiter (220) adjusts the local minimum amplitude values in the linear modulation signal (115), the phase of the linear modulation signal (115) is maintained. The conditioned linear modulation signal (125) increases the efficiency of a linear power amplifier (130). The spectral change of the linear modulation signal due to the disclosed scheme is negligible because the adjusted signal power is negligible.

摘要翻译： 公开了一种放大包括多载波调制（诸如可扩展高级调制或正交频分复用）的线性调制信号（115）的最小信号的系统和方法。 最小放大器（120）利用简单的幅度限制器（220），以便不干扰现有的峰值抑制方案。 如果局部最小振幅值小于预定最小振幅阈值，则限幅器（220）将局部最小振幅值放大到预定最小振幅阈值。 当限幅器（220）调整线性调制信号（115）中的局部最小幅度值时，维持线性调制信号（115）的相位。 经调节的线性调制信号（125）提高线性功率放大器（130）的效率。 由于所公开的方案，线性调制信号的频谱变化是可忽略的，因为调整的信号功率是可忽略的。

公开(公告)号：US07065150B2

公开(公告)日：2006-06-20

申请号：US10462506

申请日：2003-06-16

申请人： Young-Seo Park

发明人： Young-Seo Park

IPC分类号： H03C5/00 ,  H04J11/00

CPC分类号： H04L25/03834 ,  H04L27/02 ,  H04L27/2082 ,  H04L27/2602 ,  H04L27/2631 ,  H04L27/2698 ,  H04L27/363

摘要： An improved multicarrier modulation system and method, which has the advantages of both isotropic orthogonal transfer algorithm orthogonal frequency division multiplexing (IOTA OFDM) and scalable advanced modulation (SAM), is introduced. The invention is root raised cosine (RRC) OFDM using the most spectrally efficient RRC filter without sacrificing the compact subchannel spacing of OFDM. The invention further provides an adjacent channel interference (ACI) suppression scheme and a modified RRC for better suppressing ACI of RRC OFDM. The ACI suppression scheme can also be applied to SAM with the modified RRC and to IOTA OFDM with a modified IOTA. The invention greatly improves a major problem of conventional OFDM namely ACI due to the use of a wide subchannel filter. Thus, the invention allows OFDM to meet even the strictest ACI requirements, which was not possible by using a conventional raised cosine windowing method.

摘要翻译： 引入了具有各向同性正交传输算法正交频分复用（IOTA OFDM）和可扩展高级调制（SAM）的优点的改进的多载波调制系统和方法。 本发明是使用最频谱有效的RRC滤波器的根升余弦（RRC）OFDM，而不牺牲OFDM的紧凑子信道间隔。 本发明还提供了相邻信道干扰（ACI）抑制方案和用于更好地抑制RRC OFDM的ACI的修改的RRC。 ACI抑制方案也可以用经修改的RRC和具有修改的IOTA的IOTA OFDM应用于SAM。 本发明大大改善了由于使用宽子信道滤波器而导致的常规OFDM即ACI的主要问题。 因此，本发明允许OFDM满足甚至最严格的ACI要求，这通过使用常规的升余弦加窗方法是不可能的。

公开(公告)号：US20130156134A1

公开(公告)日：2013-06-20

申请号：US13329691

申请日：2011-12-19

申请人： Ariel L. Galan ,  Young-Seo Park ,  Charles H. Carter ,  Charles R. Ruelke ,  Darrell Stogner

发明人： Ariel L. Galan ,  Young-Seo Park ,  Charles H. Carter ,  Charles R. Ruelke ,  Darrell Stogner

IPC分类号： H04L27/06 ,  H03G3/20 ,  H04B1/16

CPC分类号： H04B1/0007 ,  H04B1/0071

摘要： A receiver for a wireless communication device provides a dual path receiver receiving first and second protocol-agnostic, uncorrelated receive signals simultaneously. The dual path receiver generating first and second offset IF signals from the simultaneously received first and second protocol-agnostic, uncorrelated receive signals. The receiver utilizes at least one converter for converting the first and second offset IF signals into at least one serial synchronous interface (SSI) signal representing the spectrum at IF. At least one processor receives the at least one SSI signal and applies parallel processing paths to demodulate the at least one SSI signal into separate baseband signals. The processor provides interference detection of, and level control for, the first and second offset IF signals.

摘要翻译： 用于无线通信设备的接收机提供双路径接收机同时接收第一和第二协议无关的，不相关的接收信号。 双路径接收机从同时接收的第一和第二协议无关的，不相关的接收信号产生第一和第二偏移IF信号。 接收机利用至少一个转换器将第一和第二偏移IF信号转换为表示IF处的频谱的至少一个串行同步接口（SSI）信号。 至少一个处理器接收所述至少一个SSI信号并且应用并行处理路径以将所述至少一个SSI信号解调为单独的基带信号。 处理器为第一和第二偏移IF信号提供干扰检测和电平控制。

公开(公告)号：US07103111B2

公开(公告)日：2006-09-05

申请号：US10462352

申请日：2003-06-16

申请人： Young-Seo Park

发明人： Young-Seo Park

IPC分类号： H04L25/49

CPC分类号： H04L5/0062 ,  H04L27/02 ,  H04L27/04 ,  H04L27/2082 ,  H04L27/2601 ,  H04L27/2631 ,  H04L27/2698 ,  H04L27/363

摘要： An improved multicarrier modulation system and method, which has the advantages of both isotropic orthogonal transfer algorithm orthogonal frequency division multiplexing (IOTA OFDM) and scalable advanced modulation (SAM), is introduced. The invention is root raised cosine (RRC) OFDM using the most spectrally efficient RRC filter without sacrificing the compact subchannel spacing of OFDM. The invention further provides an adjacent channel interference (ACI) suppression scheme and a modified RRC for better suppressing ACI of RRC OFDM. The ACI suppression scheme can also be applied to SAM with the modified RRC and to IOTA OFDM with a modified IOTA. The invention greatly improves a major problem of conventional OFDM namely ACI due to the use of a wide subchannel filter. Thus, the invention allows OFDM to meet even the strictest ACI requirements, which was not possible by using a conventional raised cosine windowing method.

摘要翻译： 引入了具有各向同性正交传输算法正交频分复用（IOTA OFDM）和可扩展高级调制（SAM）的优点的改进的多载波调制系统和方法。 本发明是使用最频谱有效的RRC滤波器的根升余弦（RRC）OFDM，而不牺牲OFDM的紧凑子信道间隔。 本发明还提供了相邻信道干扰（ACI）抑制方案和用于更好地抑制RRC OFDM的ACI的修改的RRC。 ACI抑制方案也可以用经修改的RRC和具有修改的IOTA的IOTA OFDM应用于SAM。 本发明大大改善了由于使用宽子信道滤波器而导致的常规OFDM即ACI的主要问题。 因此，本发明允许OFDM满足甚至最严格的ACI要求，这通过使用常规的升余弦加窗方法是不可能的。