公开(公告)号：US08259858B2

公开(公告)日：2012-09-04

申请号：US12512185

申请日：2009-07-30

申请人： Charles R. Ruelke ,  Yadunandana N. Rao ,  Darrell J. Stogner ,  Richard S. Young

发明人： Charles R. Ruelke ,  Yadunandana N. Rao ,  Darrell J. Stogner ,  Richard S. Young

IPC分类号： H04L25/06

CPC分类号： H04L25/06 ,  H03G3/3068 ,  H04L27/0014 ,  H04L27/38 ,  H04L27/3809 ,  H04L27/3863

摘要： A method of detecting an on-channel signal and synchronizing signal detection with correcting for DC offset errors in a direct conversion receiver is presented. A received signal is digitized, and a state machine operates to detect the presence of an on-channel signal. If the signal is not detected, a mixed mode training sequence is initiated in which the DC offset errors in both an analog and digital received signal path are corrected. While training, processing of the digitized samples by a digital signal processor and a host controller is suspended (while they are put into battery save mode) and the gain provided to subsequently received signals is minimized. The DC offset correction circuitry is bypassed and put into battery save mode at predetermined periods when DC offset correction is not performed.

摘要翻译： 提出了一种在直接转换接收机中检测通道信号和同步信号检测与校正直流偏移误差的方法。 接收到的信号被数字化，并且状态机操作以检测是否存在通道信号。 如果未检测到信号，则开始混合模式训练序列，其中校正模拟和数字接收信号路径中的DC偏移误差。 在训练时，由数字信号处理器和主机控制器处理数字化采样被暂停（当它们进入电池保存模式时），并且提供给随后接收到的信号的增益被最小化。 直流偏移校正电路被旁路，并且在不执行直流偏移校正的预定周期中进入省电模式。

公开(公告)号：US06564041B1

公开(公告)日：2003-05-13

申请号：US09654741

申请日：2000-09-01

申请人： Darrell J. Stogner

发明人： Darrell J. Stogner

IPC分类号： H04B110

CPC分类号： H03G3/342

摘要： An improved squelch system (10) is provided in accordance with the present invention. The system includes a high-deviation subsystem (20) to detect a carrier with modulation, and a low-deviation subsystem (30) to detect the carrier with minimal modulation. If either the high-deviation system (20) or the low-deviation system (30) indicate a signal of sufficient strength, an output for the squelch system is set to un-mute, otherwise the output (70) is set to mute.

摘要翻译： 根据本发明提供了一种改进的静噪系统（10）。 该系统包括用于检测具有调制的载波的高偏差子系统（20）和用于以最小调制来检测载波的低偏差子系统（30）。 如果高偏差系统（20）或低偏差系统（30）表示足够强度的信号，则静噪系统的输出被设置为静音，否则输出（70）被设置为静音。

公开(公告)号：US08027651B2

公开(公告)日：2011-09-27

申请号：US12329034

申请日：2008-12-05

申请人： Darrell J. Stogner ,  Yadunandana N. Rao ,  Charles R. Ruelke ,  Chet A. Lampert

发明人： Darrell J. Stogner ,  Yadunandana N. Rao ,  Charles R. Ruelke ,  Chet A. Lampert

IPC分类号： H04B17/02

CPC分类号： H04B1/30 ,  H04L25/061

摘要： A method and apparatus for correcting direct current (DC) offset errors of a received signal in a direct conversion receiver (DCR) are provided. DC offset correction algorithms are incorporated into the DCR, each algorithm being optimized for a particular receive signal operating environment. The DC offset correction algorithms remove DC offset errors in baseband In-phase and Quadrature-phase signals received within the direct conversion receiver baseband signal path. Individual DC offset correction algorithms are selected for use as determined by a signal quality estimator component. A DC offset correction component of the direct conversion receiver determines an appropriate DC offset correction algorithm suited for a particular operating environment. A criterion for a signal quality estimate is set to control transitioning between DCOC algorithms. A dual threshold strategy may be adopted to transition between one DC offset correction algorithm and another DC offset correction algorithm to provide hysteresis.

摘要翻译： 提供一种用于校正直接转换接收机（DCR）中的接收信号的直流（DC）偏移误差的方法和装置。 DC偏移校正算法被并入到DCR中，每个算法针对特定的接收信号操作环境进行优化。 DC偏移校正算法消除了在直接转换接收机基带信号路径内接收的基带同相和正交相信号中的直流失调误差。 选择单个DC偏移校正算法以由信号质量估计器组件确定使用。 直接转换接收机的DC偏移校正分量确定适合于特定操作环境的适当DC偏移校正算法。 设置信号质量估计的标准来控制DCOC算法之间的转换。 可以采用双阈值策略来在一个DC偏移校正算法和另一个DC偏移校正算法之间转换以提供滞后。

公开(公告)号：US07471620B2

公开(公告)日：2008-12-30

申请号：US10955554

申请日：2004-09-30

申请人： Scott M. Alazraki ,  Apoorv Chaudhri ,  Alan P. Conrad ,  Stanko Jelavic ,  Chet A. Lampert ,  Bob D. Logalbo ,  Darrell J. Stogner ,  Ellis A. Pinder

发明人： Scott M. Alazraki ,  Apoorv Chaudhri ,  Alan P. Conrad ,  Stanko Jelavic ,  Chet A. Lampert ,  Bob D. Logalbo ,  Darrell J. Stogner ,  Ellis A. Pinder

IPC分类号： H04J9/00

CPC分类号： H04L1/0019 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/1867

摘要： A method for the selection of forward error correction (FEC)/constellation pairings (800) for digital transmitted segments based on learning radio link adaptation (RLA) including formatting a packet transmission having a predetermined number of information bits (801). The packet is then split into a plurality of segments (803) where an RLA is used (805) to determine the optimum format of the packet. The plurality of segments is then sent to a channel encoder for FEC encoding and symbol mapping (807) at a rate selected by the RLA. The segments are then formatted into packet blocks (809) and transmitted in blocks that form a time slot at a constant symbol rate.

摘要翻译： 一种用于基于学习无线电链路自适应（RLA）选择用于数字传输段的前向纠错（FEC）/星座配对（800）的方法，包括格式化具有预定数量的信息比特的分组传输（801）。 然后将分组分解成多个段（803），其中使用RLA（805）以确定分组的最佳格式。 然后将多个段以由RLA选择的速率发送到用于FEC编码和符号映射（807）的信道编码器。 然后，这些段被格式化成分组块（809），并以以恒定符号速率形成时隙的块传输。

公开(公告)号：US07161921B2

公开(公告)日：2007-01-09

申请号：US10407349

申请日：2003-04-04

申请人： Robert D. LoGalbo ,  Alan P. Conrad ,  Darrell J. Stogner

发明人： Robert D. LoGalbo ,  Alan P. Conrad ,  Darrell J. Stogner

IPC分类号： H04J3/06

CPC分类号： H04W56/004 ,  H04W56/006 ,  H04W56/007

摘要： Disclosed are methods for adjustment values. In one embodiment, a cumulative adjustment value is provided in memory, an inbound signal is transmitted to a base station during a random access opportunity, and a relative adjustment value is received from the base station. Then, the relative adjustment value is summed with the cumulative adjustment value to create a new cumulative adjustment value which is stored in the memory. Finally, a subsequent inbound signal is transmitted using the new cumulative adjustment value during a reserved access opportunity.

摘要翻译： 披露的是调整值的方法。 在一个实施例中，在存储器中提供累积调整值，在随机访问机会期间将入站信号发送到基站，并且从基站接收相对调整值。 然后，相对调整值与累积调整值相加以创建存储在存储器中的新的累积调整值。 最后，在保留访问机会期间，使用新的累积调整值来发送随后的入站信号。

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：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：US20120028594A1

公开(公告)日：2012-02-02

申请号：US12844961

申请日：2010-07-28

申请人： YADUNANDANA RAO ,  CHARLES R. RUELKE ,  DARRELL J. STOGNER ,  RICHARD S. YOUNG

发明人： YADUNANDANA RAO ,  CHARLES R. RUELKE ,  DARRELL J. STOGNER ,  RICHARD S. YOUNG

IPC分类号： H04B1/16

CPC分类号： H04B1/30 ,  H03D3/009 ,  H03D2200/0047 ,  H03D2200/0082 ,  H03G3/3052

摘要： An apparatus and method for demodulating an FM RF signal is presented. An Adaptive Differentiate Cross Multiply (ADCM) system in which the energy estimate of the desired on-channel RF is generated using adaptive filtering. The adaptive filter includes low pass filtering of the instantaneous energy estimate. The bandwidth of the LPF is adjusted in real time based on the received signal strength energy estimate, the periodicity of any changes in the energy estimate, AGC setting for the receiver, and/or the type of sub-audible signaling applied to the RF signal if known. After the bandwidth is set, the optimum filtered energy estimate is applied to the system to demodulate the received information free from distortion artifacts associated with IQ imbalance. A normalized signal in the ADCM system is clipped by a limiter whose clipping threshold is equal to a maximum gain of differentiators in the ADCM system.

摘要翻译： 提出了一种用于解调FM RF信号的装置和方法。 自适应差分交叉乘法（ADCM）系统，其中使用自适应滤波来生成期望的同信道RF的能量估计。 自适应滤波器包括瞬时能量估计的低通滤波。 基于接收到的信号强度能量估计，能量估计的任何变化的周期性，接收机的AGC设置和/或应用于RF信号的子听觉信号的类型，实时地调整LPF的带宽 如果已知。 在设置带宽之后，将最佳滤波能量估计值应用于系统以解调所接收到的信息，而不存在与IQ失衡相关的失真伪像。 ADCM系统中的归一化信号由限幅器限幅，其限幅阈值等于ADCM系统中微分器的最大增益。

公开(公告)号：US20100144303A1

公开(公告)日：2010-06-10

申请号：US12329034

申请日：2008-12-05

申请人： DARRELL J. STOGNER ,  Yadunandana N. Rao ,  Charles R. Ruelke ,  Chet A. Lampert

发明人： DARRELL J. STOGNER ,  Yadunandana N. Rao ,  Charles R. Ruelke ,  Chet A. Lampert

IPC分类号： H04B1/10

CPC分类号： H04B1/30 ,  H04L25/061

摘要： A method and apparatus for correcting direct current (DC) offset errors of a received signal in a direct conversion receiver (DCR) are provided. DC offset correction algorithms are incorporated into the DCR, each algorithm being optimized for a particular receive signal operating environment. The DC offset correction algorithms remove DC offset errors in baseband In-phase and Quadrature-phase signals received within the direct conversion receiver baseband signal path. Individual DC offset correction algorithms are selected for use as determined by a signal quality estimator component. A DC offset correction component of the direct conversion receiver determines an appropriate DC offset correction algorithm suited for a particular operating environment. A criterion for a signal quality estimate is set to control transitioning between DCOC algorithms. A dual threshold strategy may be adopted to transition between one DC offset correction algorithm and another DC offset correction algorithm to provide hysteresis.

摘要翻译： 提供一种用于校正直接转换接收机（DCR）中的接收信号的直流（DC）偏移误差的方法和装置。 DC偏移校正算法被并入到DCR中，每个算法针对特定的接收信号操作环境进行优化。 DC偏移校正算法消除了在直接转换接收机基带信号路径内接收的基带同相和正交相信号中的直流失调误差。 选择单个DC偏移校正算法以由信号质量估计器组件确定使用。 直接转换接收机的DC偏移校正分量确定适合于特定操作环境的适当DC偏移校正算法。 设置信号质量估计的标准来控制DCOC算法之间的转换。 可以采用双阈值策略来在一个DC偏移校正算法和另一个DC偏移校正算法之间转换以提供滞后。

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。