公开(公告)号：US07787572B2

公开(公告)日：2010-08-31

申请号：US11204606

申请日：2005-08-15

申请人： Louis L. Scharf ,  Vijay Nagarajan

发明人： Louis L. Scharf ,  Vijay Nagarajan

IPC分类号： H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC分类号： H04B1/126 ,  H04B1/1027 ,  H04B1/1081 ,  H04B1/7105 ,  H04B1/7107 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/0678 ,  H04B7/0891 ,  H04B2001/1045 ,  H04B2201/70719 ,  H04B2201/70979 ,  H04J13/0022 ,  H04J13/20

摘要： A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected subchannel symbol estimates, and an interference canceller for cancelling selected interference in the received signal. At least one of the channel decomposition module, the synthesizer, and the interference canceller are configurable for processing multi-mode signals.

摘要翻译： 多模式接收机包括用于将接收到的信号分离为多路径分量的信道分解模块（例如，Rake接收机），用于选择干扰路径和子信道的干扰选择器，用于合成来自所选子信道符号估计的干扰信号的合成器，以及 干扰消除器，用于消除所接收信号中的选定干扰。 信道分解模块，合成器和干扰消除器中的至少一个可配置用于处理多模信号。

公开(公告)号：US08588349B2

公开(公告)日：2013-11-19

申请号：US13253075

申请日：2011-10-05

申请人： Vijay Nagarajan ,  Louis L. Scharf ,  Anand P. Narayan

发明人： Vijay Nagarajan ,  Louis L. Scharf ,  Anand P. Narayan

IPC分类号： H04L25/08

CPC分类号： H04B1/7107 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/709727

摘要： A receiver employs low-rate processing to synthesize the effect of high-rate interference in a received multi-rate signal. Each high-rate subchannel is analyzed on its low-rate descendents to produce symbol estimates for each low-rate symbol interval. The symbol estimates are applied to low-rate descendent subchannels, which are then combined to synthesize the effects of the high-rate interference. An interference canceller processes the synthesized interference with the received signal for producing an interference-cancelled signal. Alternatively, analogous steps may be applied at high-rate to analyze, synthesize, and cancel the effects of low-rate interference in a multi-rate signal.

公开(公告)号：US20110069796A1

公开(公告)日：2011-03-24

申请号：US12958141

申请日：2010-12-01

申请人： Louis L. Scharf ,  Vijay Nagarajan

发明人： Louis L. Scharf ,  Vijay Nagarajan

IPC分类号： H04B1/10

CPC分类号： H04B1/126 ,  H04B1/1027 ,  H04B1/1081 ,  H04B1/7105 ,  H04B1/7107 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/0678 ,  H04B7/0891 ,  H04B2001/1045 ,  H04B2201/70719 ,  H04B2201/70979 ,  H04J13/0022 ,  H04J13/20

摘要： A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected sub channel symbol estimates, and an interference canceller for cancelling selected interference in the received signal. At least one of the channel decomposition module, the synthesizer, and the interference canceller are configurable for processing multi-mode signals.

摘要翻译： 多模式接收机包括用于将接收信号分离为多路径分量的信道分解模块（例如，Rake接收机），用于选择干扰路径和子信道的干扰选择器，用于合成来自所选子信道符号估计的干扰信号的合成器，以及 干扰消除器，用于消除接收到的信号中的选定干扰。 信道分解模块，合成器和干扰消除器中的至少一个可配置用于处理多模信号。

公开(公告)号：US08064498B2

公开(公告)日：2011-11-22

申请号：US12727880

申请日：2010-03-19

申请人： Vijay Nagarajan ,  Louis L. Scharf ,  Armand P. Narayan

发明人： Vijay Nagarajan ,  Louis L. Scharf ,  Armand P. Narayan

IPC分类号： H04B1/00

CPC分类号： H04B1/7107 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/709727

摘要： A receiver employs low-rate processing to synthesize the effect of high-rate interference in a received multi-rate signal. Each high-rate subchannel is analyzed on its low-rate descendents to produce symbol estimates for each low-rate symbol interval. The symbol estimates are applied to low-rate descendent subchannels, which are then combined to synthesize the effects of the high-rate interference. An interference canceller processes the synthesized interference with the received signal for producing an interference-cancelled signal. Alternatively, analogous steps may be applied at high-rate to analyze, synthesize, and cancel the effects of low-rate interference in a multi-rate signal.

摘要翻译： 接收机采用低速率处理来合成接收的多速率信号中的高速率干扰的影响。 在其低速率后代分析每个高速率子信道，以对每个低速率符号间隔产生符号估计。 符号估计适用于低速率后代子信道，然后将其合并，以合成高速率干扰的影响。 干扰消除器处理与接收信号的合成干扰以产生干扰消除信号。 或者，可以以高速率应用类似的步骤来分析，合成和消除多速率信号中的低速率干扰的影响。

公开(公告)号：US07463609B2

公开(公告)日：2008-12-09

申请号：US11192763

申请日：2005-07-29

申请人： Louis L. Scharf ,  Vijay Nagarajan

发明人： Louis L. Scharf ,  Vijay Nagarajan

IPC分类号： H04B7/216

CPC分类号： H04B1/7107

摘要： The receiver includes a Rake receiver for separating a received signal into multipath components, an interference selector for selecting interference symbols corresponding to interfering paths and subchannels, a synthesizer for synthesizing an interference signal from selected paths and estimated subchannel symbols, and a canceller for constructing a projection operator or a scale-invariant subtraction operator to cancel selected interference in multipath components of the received signal, or from the received signal itself. The interference canceller may use a sequence of symbol estimates to simultaneously cancel inter-channel interference and inter-symbol interference. Interference cancellers may be placed at one or more locations within the receiver chain.

摘要翻译： 接收机包括用于将接收到的信号分离为多路径分量的Rake接收机，用于选择对应于干扰路径和子信道的干扰符号的干扰选择器，用于合成来自所选路径的干扰信号的合成器和估计的子信道符号，以及用于构建 投影运算符或缩放不变减法运算符，以消除接收信号的多路径分量中的选定干扰，或从接收信号本身。 干扰消除器可以使用符号估计序列来同时消除信道间干扰和符号间干扰。 干扰消除器可以放置在接收器链中的一个或多个位置处。

公开(公告)号：US20120027138A1

公开(公告)日：2012-02-02

申请号：US13253075

申请日：2011-10-05

申请人： Vijay Nagarajan ,  Louis L. Scharf ,  Anand P. Narayan

发明人： Vijay Nagarajan ,  Louis L. Scharf ,  Anand P. Narayan

IPC分类号： H04L25/08

CPC分类号： H04B1/7107 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/709727

摘要： A receiver employs low-rate processing to synthesize the effect of high-rate interference in a received multi-rate signal. Each high-rate subchannel is analyzed on its low-rate descendents to produce symbol estimates for each low-rate symbol interval. The symbol estimates are applied to low-rate descendent subchannels, which are then combined to synthesize the effects of the high-rate interference. An interference canceller processes the synthesized interference with the received signal for producing an interference-cancelled signal. Alternatively, analogous steps may be applied at high-rate to analyze, synthesize, and cancel the effects of low-rate interference in a multi-rate signal.

摘要翻译： 接收机采用低速率处理来合成接收的多速率信号中的高速率干扰的影响。 在其低速率后代分析每个高速率子信道，以对每个低速率符号间隔产生符号估计。 符号估计适用于低速率后代子信道，然后将其合并，以合成高速率干扰的影响。 干扰消除器处理与接收信号的合成干扰以产生干扰消除信号。 或者，可以以高速率应用类似的步骤来分析，合成和消除多速率信号中的低速率干扰的影响。

公开(公告)号：US09647708B2

公开(公告)日：2017-05-09

申请号：US12871776

申请日：2010-08-30

申请人： Louis L. Scharf ,  Vijay Nagarajan ,  John K. Thomas

发明人： Louis L. Scharf ,  Vijay Nagarajan ,  John K. Thomas

IPC分类号： H04B1/12 ,  H04B1/7105 ,  H04B1/7107 ,  H04B1/7117 ,  H04B7/06 ,  H04B7/08 ,  H04J13/20 ,  H04J13/00 ,  H04B1/712

CPC分类号： H04B1/126 ,  H04B1/1027 ,  H04B1/1081 ,  H04B1/7105 ,  H04B1/7107 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/0678 ,  H04B7/0891 ,  H04B2001/1045 ,  H04B2201/70719 ,  H04B2201/70979 ,  H04J13/0022 ,  H04J13/20

摘要： A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected sub channel symbol estimates, and an interference canceller for cancelling selected interference in the received signal. At least one of the channel decomposition module, the synthesizer, and the interference canceller are configurable for processing multi-mode signals.

公开(公告)号：US20100329402A1

公开(公告)日：2010-12-30

申请号：US12871776

申请日：2010-08-30

申请人： Louis L. Scharf ,  Vijay Nagarajan ,  John K. Thomas

发明人： Louis L. Scharf ,  Vijay Nagarajan ,  John K. Thomas

IPC分类号： H03D1/04

CPC分类号： H04B1/126 ,  H04B1/1027 ,  H04B1/1081 ,  H04B1/7105 ,  H04B1/7107 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/0678 ,  H04B7/0891 ,  H04B2001/1045 ,  H04B2201/70719 ,  H04B2201/70979 ,  H04J13/0022 ,  H04J13/20

摘要： A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected sub channel symbol estimates, and an interference canceller for cancelling selected interference in the received signal. At least one of the channel decomposition module, the synthesizer, and the interference canceller are configurable for processing multi-mode signals.

摘要翻译： 多模式接收机包括用于将接收信号分离为多路径分量的信道分解模块（例如，Rake接收机），用于选择干扰路径和子信道的干扰选择器，用于合成来自所选子信道符号估计的干扰信号的合成器，以及 干扰消除器，用于消除接收到的信号中的选定干扰。 信道分解模块，合成器和干扰消除器中的至少一个可配置用于处理多模信号。

公开(公告)号：US08218697B2

公开(公告)日：2012-07-10

申请号：US12707507

申请日：2010-02-17

申请人： Tommy Guess ,  Michael L. McCloud ,  Louis L. Scharf

发明人： Tommy Guess ,  Michael L. McCloud ,  Louis L. Scharf

IPC分类号： H03D1/04 ,  H03K5/01

CPC分类号： H04L1/0631 ,  H04L1/0048 ,  H04L1/005 ,  H04L5/023 ,  H04L25/0328 ,  H04L27/2647

摘要： An OFDMA-MIMO receiver performs a recursive interference cancellation across several correlated subbands and several receive antenna elements to demodulate complex source symbols for several users that have been coded across several subbands and transmit antennas. The iterative parallel interference canceller (PIC) is configured to work in the presence of both spatial and frequency structure introduced by the transmitter space-frequency mapping and the actual frequency selective wireless channel. The interference canceller uses mixed decisions, confidence weights, and stabilizing step sizes in a PIC receiver, which may be used with a successive decoding architecture in a receiver that employs a combination of modulation level interference cancellation with successive decoding.

摘要翻译： OFDMA-MIMO接收机在几个相关子带和若干接收天线元件之间执行递归干扰消除，以解调多个已经在多个子带和发射天线上编码的用户的复数源符号。 迭代并行干扰消除器（PIC）被配置为在存在由发射机空间频率映射和实际频率选择性无线信道引入的空间和频率结构的情况下工作。 干扰消除器在PIC接收机中使用混合决策，置信权重和稳定步长，其可以与采用调制级干扰消除与连续解码的组合的接收机中的连续解码架构一起使用。

公开(公告)号：US20100208854A1

公开(公告)日：2010-08-19

申请号：US12707507

申请日：2010-02-17

申请人： Tommy Guess ,  Michael L. McCloud ,  Louis L. Scharf

发明人： Tommy Guess ,  Michael L. McCloud ,  Louis L. Scharf

IPC分类号： H04B1/10 ,  H04B7/10

CPC分类号： H04L1/0631 ,  H04L1/0048 ,  H04L1/005 ,  H04L5/023 ,  H04L25/0328 ,  H04L27/2647

摘要： An OFDMA-MIMO receiver performs a recursive interference cancellation across several correlated subbands and several receive antenna elements to demodulate complex source symbols for several users that have been coded across several subbands and transmit antennas. The iterative parallel interference canceller (PIC) is configured to work in the presence of both spatial and frequency structure introduced by the transmitter space-frequency mapping and the actual frequency selective wireless channel. The interference canceller uses mixed decisions, confidence weights, and stabilizing step sizes in a PIC receiver, which may be used with a successive decoding architecture in a receiver that employs a combination of modulation level interference cancellation with successive decoding.

摘要翻译： OFDMA-MIMO接收机在几个相关子带和若干接收天线元件之间执行递归干扰消除，以解调多个已经在多个子带和发射天线上编码的用户的复数源符号。 迭代并行干扰消除器（PIC）被配置为在存在由发射机空间频率映射和实际频率选择性无线信道引入的空间和频率结构的情况下工作。 干扰消除器在PIC接收机中使用混合决策，置信权重和稳定步长，其可以与采用调制级干扰消除与连续解码的组合的接收机中的连续解码架构一起使用。