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：US20080025341A1

公开(公告)日：2008-01-31

申请号：US11461326

申请日：2006-07-31

申请人： Yadunandana N. Rao ,  Apoorv Chaudhri ,  Chet A. Lampert

发明人： Yadunandana N. Rao ,  Apoorv Chaudhri ,  Chet A. Lampert

IPC分类号： H04J3/22

CPC分类号： H04W72/048 ,  H04W52/0216 ,  H04W52/0219 ,  H04W52/0258 ,  H04W72/042 ,  Y02D70/1224 ,  Y02D70/142

摘要： A system (100) and method (500) for method for channel slot granting is provided. The method includes estimating (502) a temperature of a device (102), adjusting (504) a duty-cycle of the device based on the temperature, sending (506) the duty-cycle to a base station (110) and allocating (510) time slots for the device in accordance with the duty-cycle. A rate of slot assignments to multiple devices can be controlled (512) based on multiple duty-cycles received. The duty-cycle and temperature can be included (610) in a Quality of Service (QoS) metric for inbound and outbound performance.

摘要翻译： 提供了一种用于通道槽授予方法的系统（100）和方法（500）。 该方法包括估计（502）设备（102）的温度，基于温度调整（504）设备的占空比，将占空比发送（506）到基站（110）并分配（ 510）设备根据占空比的时隙。 可以基于接收到的多个占空比控制多个设备的时隙分配速率（512）。 可以在入站和出站性能的服务质量（QoS）度量中包括占空比和温度（610）。

公开(公告)号：US07126912B2

公开(公告)日：2006-10-24

申请号：US10158038

申请日：2002-05-30

申请人： Darrell James Stogner ,  Alan P. Conrad ,  Chet A. Lampert ,  Robert D. Logalbo

发明人： Darrell James Stogner ,  Alan P. Conrad ,  Chet A. Lampert ,  Robert D. Logalbo

IPC分类号： H04J3/02 ,  H04L12/54 ,  G06F13/00

CPC分类号： H04L47/6215 ,  H04L47/24 ,  H04L47/50 ,  H04L47/624 ,  H04L49/90 ,  H04L49/9084 ,  H04W28/14 ,  H04W72/1242

摘要： Methods for sequencing datagram transmissions are disclosed, including, receiving an unqueued segment to be enqueued in a queue. The queue comprises at least one segment. Determining a priority level and a number of attempted transmissions for the unqueued segment (100). If the unqueued segment is enqueued in front of a segment belonging to a datagram in the queue, and at least one segment belonging to the datagram has been transmitted before all the segments belonging to the datagram have been transmitted, at least one of the following functions is performed: discarding any remaining segments belonging to the datagram in the queue, transmitting any remaining segments belonging to the datagram in the queue, and re-enqueuing segments belonging to the datagram at the same location in the queue as the partially transmitted datagram, but with a different identifier.

摘要翻译： 公开了对数据报传输进行排序的方法，包括接收队列中排队的无队列段。 队列包括至少一个段。 确定未排队段（100）的优先级和尝试传输次数。 如果未队列段在属于队列中的数据报的段的前面入队，并且属于数据报的至少一个段已经在所有属于该数据报的段已被发送之前被发送，则至少有以下一个功能 执行：丢弃属于队列中的数据报的任何剩余段，将属于该数据报的任何剩余段传送到队列中，并且将属于数据报的段重新排队在队列中与部分传输的数据报相同的位置，但是 具有不同的标识符。

公开(公告)号：US08611479B2

公开(公告)日：2013-12-17

申请号：US13314603

申请日：2011-12-08

申请人： Yadunandana N. Rao ,  Chet A. Lampert

发明人： Yadunandana N. Rao ,  Chet A. Lampert

IPC分类号： H03D1/04

CPC分类号： H04B1/30

摘要： A communication system comprises a direct conversion receiver for correcting imbalance errors. The direct conversion receiver receives a radio frequency (RF) signal and converts the RF signal to baseband signals. The direct conversion receiver further translates the baseband signals to digital signals having a direct current (DC) offset and applies a DC offset correction to the digital signals having the DC offset to generate first DC offset corrected signals. An imbalance correction unit of the direct conversion receiver applies an imbalance correction to the first DC offset corrected signals by estimating an error between an average envelope of the first DC offset corrected signals and an average envelope of second DC offset corrected signals. The imbalance correction unit is fixed at initial imbalance parameter values. The direct conversion receiver further updates the initial imbalance parameter values of the imbalance correction unit based on the estimated error for correcting imbalance errors.

摘要翻译： 通信系统包括用于校正不平衡误差的直接转换接收器。 直接转换接收器接收射频（RF）信号并将RF信号转换为基带信号。 直接转换接收器进一步将基带信号转换为具有直流（DC）偏移的数字信号，并将DC偏移校正应用于具有DC偏移的数字信号以产生第一DC偏移校正信号。 直接变换接收器的不平衡校正单元通过估计第一DC偏移校正信号的平均包络和第二DC偏移校正信号的平均包络之间的误差来对第一DC偏移校正信号施加不平衡校正。 不平衡校正单元固定在初始不平衡参数值。 直接变换接收机进一步基于用于校正不平衡误差的估计误差来更新不平衡校正单元的初始不平衡参数值。

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：US20130148761A1

公开(公告)日：2013-06-13

申请号：US13314603

申请日：2011-12-08

申请人： Yadunandana N. Rao ,  Chet A. Lampert

发明人： Yadunandana N. Rao ,  Chet A. Lampert

IPC分类号： H04L25/06

CPC分类号： H04B1/30

摘要： A communication system comprises a direct conversion receiver for correcting imbalance errors. The direct conversion receiver receives a radio frequency (RF) signal and converts the RF signal to baseband signals. The direct conversion receiver further translates the baseband signals to digital signals having a direct current (DC) offset and applies a DC offset correction to the digital signals having the DC offset to generate first DC offset corrected signals. An imbalance correction unit of the direct conversion receiver applies an imbalance correction to the first DC offset corrected signals by estimating an error between an average envelope of the first DC offset corrected signals and an average envelope of second DC offset corrected signals. The imbalance correction unit is fixed at initial imbalance parameter values. The direct conversion receiver further updates the initial imbalance parameter values of the imbalance correction unit based on the estimated error for correcting imbalance errors.

摘要翻译： 通信系统包括用于校正不平衡误差的直接转换接收器。 直接转换接收器接收射频（RF）信号并将RF信号转换为基带信号。 直接转换接收器进一步将基带信号转换为具有直流（DC）偏移的数字信号，并将DC偏移校正应用于具有DC偏移的数字信号以产生第一DC偏移校正信号。 直接变换接收器的不平衡校正单元通过估计第一DC偏移校正信号的平均包络和第二DC偏移校正信号的平均包络之间的误差来对第一DC偏移校正信号施加不平衡校正。 不平衡校正单元固定在初始不平衡参数值。 直接变换接收机进一步基于用于校正不平衡误差的估计误差来更新不平衡校正单元的初始不平衡参数值。

公开(公告)号：US06829558B2

公开(公告)日：2004-12-07

申请号：US10185996

申请日：2002-06-27

申请人： Charles B. Swope ,  Chet A. Lampert

发明人： Charles B. Swope ,  Chet A. Lampert

IPC分类号： G01C1700

CPC分类号： G01C21/20 ,  G01C21/165

摘要： A first set of coordinates (100) of a device and an estimated positional error (“EPE”) radius (102) is measured. An EPE circle (104) is derived, in which the device is approximately located, from the first set of coordinates (100) and the EPE radius (102). When it is determined that the EPE radius (102) exceeds a predetermined threshold, a first range (106) between the device and a ranging site (108) is measured, and a locus of points (110) on and within the EPE circle (104) is determined, wherein a distance between the ranging site (108) and each point in the locus of points (110) approximately equals the first range (106).

公开(公告)号：US06801159B2

公开(公告)日：2004-10-05

申请号：US10100640

申请日：2002-03-19

申请人： Charles B. Swope ,  Chet A. Lampert

发明人： Charles B. Swope ,  Chet A. Lampert

IPC分类号： G01S502

CPC分类号： G01S19/49 ,  G01C21/165

摘要： A perimeter threshold of an area is defined. The location of a device (102) is tracked using a first location technology (108) when the device (102) precedes the perimeter threshold. The location of the device (102) is tracked using a second location technology (100) when the device (102) exceeds the perimeter threshold.

摘要翻译： 定义区域的周界阈值。 当设备（102）在周边阈值之前时，使用第一定位技术（108）跟踪设备（102）的位置。 当设备（102）超过周界阈值时，使用第二定位技术（100）跟踪设备（102）的位置。