公开(公告)号：US07027530B2

公开(公告)日：2006-04-11

申请号：US09833749

申请日：2001-04-11

申请人： William McFarland ,  Teresa H. Meng ,  Paul J. Husted ,  John S. Thomson

发明人： William McFarland ,  Teresa H. Meng ,  Paul J. Husted ,  John S. Thomson

IPC分类号： H04L27/06

CPC分类号： H04L1/0054 ,  H03G3/3052 ,  H04L27/2605 ,  H04L27/2647

摘要： The present invention provides a method of and an apparatus for changing the gain of a receive path amplifier during the middle of a packet transmission, and particularly changing the gain during a guard interval between a symbol with encoding bits disposed therein and a subsequent data symbol encoded in a manner corresponding to the encoding bits.

公开(公告)号：US08498368B1

公开(公告)日：2013-07-30

申请号：US10367049

申请日：2003-02-14

申请人： Paul J. Husted ,  William J. McFarland ,  Teresa H. Meng ,  John S. Thomson

发明人： Paul J. Husted ,  William J. McFarland ,  Teresa H. Meng ,  John S. Thomson

IPC分类号： H04L27/08

CPC分类号： H03G3/3052 ,  H03G3/3073 ,  H03G3/3078 ,  H04L1/0003 ,  H04L1/0046 ,  H04L1/0054 ,  H04L23/00 ,  H04L27/0012 ,  H04L27/2605 ,  H04L27/2647

摘要： In some wireless local area networks (WLANs), signals of different modulation types and rates can be received. To operate optimally, the gain of an amplifier in a receiver can be set based on a specific modulation type and rate. For example, the gain of a receive path amplifier can be changed based on one or more unique identifying characteristics in a received data packet. Once the unique identifying characteristics are located, they can be analyzed to determine which modulation type and rate are represented. The appropriate gain of the amplifier can be set based on the modulation type and rate. Advantageously, subsequent data symbols can be amplified with the set gain, thereby ensuring that the receiver optimally receives those data symbols.

摘要翻译： 在一些无线局域网（WLAN）中，可以接收不同调制类型和速率的信号。 为了最佳地操作，可以基于特定的调制类型和速率来设置接收机中的放大器的增益。 例如，接收路径放大器的增益可以基于接收的数据分组中的一个或多个唯一的识别特征来改变。 一旦找到了唯一的识别特征，就可以对它们进行分析，以确定哪种调制类型和速率被表示。 可以根据调制类型和速率设置放大器的适当增益。 有利地，随后的数据符号可以用设定的增益进行放大，从而确保接收机最佳地接收那些数据符号。

公开(公告)号：US07035589B1

公开(公告)日：2006-04-25

申请号：US10253003

申请日：2002-09-23

申请人： Teresa H. Meng ,  Paul J. Husted

发明人： Teresa H. Meng ,  Paul J. Husted

IPC分类号： H04B1/10

CPC分类号： H04B1/1027

摘要： A method and system for reducing the DC offset in a receiver in the presence of carrier frequency offset between the transmitter and the receiver. The present invention utilizes the knowledge of the carrier frequency offset to determine the phase difference between two (or more) snapshots of the same transmitted symbol. The receiver DC offset is solved for using a linear system solver which can be implemented outside the analog domain. The DC offset may be tracked in order to maintain a constant adjust of the DC offset, which in combination with the above DC offset estimation technique implements a complete solution for the DC offset cancellation problem.

摘要翻译： 一种用于在存在发射机和接收机之间的载波频率偏移的情况下减小接收机中的DC偏移的方法和系统。 本发明利用载波频率偏移的知识来确定相同发射符号的两个（或多个）快照之间的相位差。 解决了接收机DC偏移，使用可以在模拟域外部实现的线性系统求解器。 可以跟踪DC偏移，以便保持DC偏移的恒定调整，其结合上述DC偏移估计技术实现DC偏移消除问题的完整解决方案。

公开(公告)号：US06507619B1

公开(公告)日：2003-01-14

申请号：US09535902

申请日：2000-03-24

申请人： John S. Thomson ,  Paul J. Husted

发明人： John S. Thomson ,  Paul J. Husted

IPC分类号： H03D100

CPC分类号： H03M13/6325 ,  H03M13/25 ,  H03M13/2707 ,  H03M13/4169 ,  H03M13/6502 ,  H04L1/0054 ,  H04L27/38

摘要： A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. This results in performance superior to pure hard decision decoding and approaches that of soft decision decoding; moreover, it is applicable in many situations where soft decision decoding cannot be used.

摘要翻译： 维特比解码系统将接收的QAM星座中的比特解释为多值参数，而不是二进制值参数。 它使用这些多值参数来执行维特比算法，以提供优于硬判决解码的结果。 系统使用非阶梯线性或弯曲传递函数来向位指定值，而不是将硬0-1函数应用于QAM数据。 这导致性能优于纯硬判决解码和软判决解码的方法; 此外，它适用于许多软判决解码不能使用的情况。

公开(公告)号：US07924932B2

公开(公告)日：2011-04-12

申请号：US12615024

申请日：2009-11-09

申请人： John S. Thomson ,  Paul J. Husted ,  Ardavan Maleki Tehrani ,  Jeffrey M. Gilbert ,  William J. McFarland ,  Lars E. Thon ,  Yi-Hsiu Wang

发明人： John S. Thomson ,  Paul J. Husted ,  Ardavan Maleki Tehrani ,  Jeffrey M. Gilbert ,  William J. McFarland ,  Lars E. Thon ,  Yi-Hsiu Wang

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/067 ,  H03M13/25 ,  H03M13/3961 ,  H03M13/41 ,  H03M13/6325 ,  H03M13/6362 ,  H04K3/228 ,  H04L1/005 ,  H04L1/0054 ,  H04L27/38

摘要： A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. In another aspect, a system differentiates between data bits based on their estimated reliability, giving more emphasis to decoding reliable bits than unreliable bits using any of a variety of techniques. By differentiating between good and bad bits and de-emphasizing or ignoring unreliable bits, the system can provide a significant reduction in uncorrectable errors and packet loss.

摘要翻译： 维特比解码系统将接收的QAM星座中的比特解释为多值参数，而不是二进制值参数。 它使用这些多值参数来执行维特比算法，以提供优于硬判决解码的结果。 系统使用非阶梯线性或弯曲传递函数来向位指定值，而不是将硬0-1函数应用于QAM数据。 在另一方面，一种系统基于其估计的可靠性来区分数据比特，更多地强调使用各种技术中的任何一种来解码可靠比特比不可靠比特。 通过区分好坏位和去强调或忽略不可靠位，系统可以显着减少不可纠正的错误和数据包丢失。

公开(公告)号：US20100098183A1

公开(公告)日：2010-04-22

申请号：US12615024

申请日：2009-11-09

申请人： John S. Thomson ,  Paul J. Husted ,  Ardavan M. Tehrani ,  Jeffrey M. Gilbert ,  William J. McFarland ,  Lars E. Thon ,  Yi-Hsiu Wang

发明人： John S. Thomson ,  Paul J. Husted ,  Ardavan M. Tehrani ,  Jeffrey M. Gilbert ,  William J. McFarland ,  Lars E. Thon ,  Yi-Hsiu Wang

IPC分类号： H04L5/12

CPC分类号： H04L25/067 ,  H03M13/25 ,  H03M13/3961 ,  H03M13/41 ,  H03M13/6325 ,  H03M13/6362 ,  H04K3/228 ,  H04L1/005 ,  H04L1/0054 ,  H04L27/38

摘要： A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. In another aspect, a system differentiates between data bits based on their estimated reliability, giving more emphasis to decoding reliable bits than unreliable bits using any of a variety of techniques. By differentiating between god and bad bits and de-emphasizing or ignoring unreliable bits, the system can provide a significant reduction in uncorrectable errors and packet loss.

摘要翻译： 维特比解码系统将接收的QAM星座中的比特解释为多值参数，而不是二进制值参数。 它使用这些多值参数来执行维特比算法，以提供优于硬判决解码的结果。 系统使用非阶梯线性或弯曲传递函数来向位指定值，而不是将硬0-1函数应用于QAM数据。 在另一方面，一种系统基于其估计的可靠性来区分数据比特，更多地强调使用各种技术中的任何一种来解码可靠比特比不可靠比特。 通过区分神和坏位，并且不强调或忽略不可靠比特，系统可以显着减少不可校正的错误和分组丢失。

公开(公告)号：US07636400B2

公开(公告)日：2009-12-22

申请号：US11621940

申请日：2007-01-10

申请人： John S. Thomson ,  Paul J. Husted ,  Ardavan Maleki Tehrani ,  Jeffrey M. Gilbert ,  William J. McFarland ,  Lars E. Thon ,  Yi-Hsiu Wang

发明人： John S. Thomson ,  Paul J. Husted ,  Ardavan Maleki Tehrani ,  Jeffrey M. Gilbert ,  William J. McFarland ,  Lars E. Thon ,  Yi-Hsiu Wang

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/067 ,  H03M13/25 ,  H03M13/3961 ,  H03M13/41 ,  H03M13/6325 ,  H03M13/6362 ,  H04K3/228 ,  H04L1/005 ,  H04L1/0054 ,  H04L27/38

摘要： A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. In another aspect, a system differentiates between data bits based on their estimated reliability, giving more emphasis to decoding reliable bits than unreliable bits using any of a variety of techniques. By differentiating between god and bad bits and de-emphasizing or ignoring unreliable bits, the system can provide a significant reduction in uncorrectable errors and packet loss.

公开(公告)号：US09054766B2

公开(公告)日：2015-06-09

申请号：US13416877

申请日：2012-03-09

申请人： James Cho ,  Paul J. Husted

发明人： James Cho ,  Paul J. Husted

IPC分类号： H04B7/216 ,  H04B7/212 ,  H04B7/08 ,  H04B7/06 ,  H04W24/00

CPC分类号： H04B7/086 ,  H04B7/0617 ,  H04B7/0814 ,  H04W24/00

摘要： A method and apparatus for wirelessly transmitting real-time data streams is described. To ensure continuous data flow, fast diversity and slow diversity can be used. Fast diversity chooses a receive antenna based on received signal parameters, such as signal strength, during the transmission header and prior to information transfer. Slow diversity stores received signal parameters from previous packets, associates the parameters with a selected antenna, and uses the parameter history to denote a “default” antenna. Additionally, receive and/or transmit beam forming can be used to maintain continuous communication between stations. Beam forming, which combines antenna signals to maximize performance, is possible when at least two transmit/receive signal processing chains are available.

摘要翻译： 描述了一种无线传输实时数据流的方法和装置。 为了确保连续的数据流，可以使用快速的分集和缓慢的分集。 快速分集基于接收到的信号参数（例如信号强度）在传输报头期间以及信息传输之前选择接收天线。 慢分集存储来自先前分组的接收信号参数，将参数与选定天线相关联，并使用参数历史来表示“默认”天线。 此外，可以使用接收和/或发射波束形成来维持站点之间的连续通信。 当至少两个发送/接收信号处理链可用时，可以组合天线信号以最大化性能的波束形成。

公开(公告)号：US08817925B2

公开(公告)日：2014-08-26

申请号：US13422875

申请日：2012-03-16

申请人： Paul J. Husted ,  Michael P. Mack ,  Srenik S. Mehta

发明人： Paul J. Husted ,  Michael P. Mack ,  Srenik S. Mehta

IPC分类号： H03D1/04 ,  H03D1/06

CPC分类号： H04B1/12 ,  H04B15/06

摘要： This disclosure is directed to a wireless device with a suppressor that couples to the aggressor signal of a frequency source to generate a cancelling signal for suppressing spurs resulting from operation of the frequency source. The amplitude and phase delay of the cancelling signal are adjusted to optimize the cancellation of the spur. Preferably, a calibration routine is performed to establish appropriate delay and amplitude values to cancel the spurs occurring at each device gain setting.

摘要翻译： 本公开涉及具有抑制器的无线设备，该抑制器耦合到频率源的侵入者信号，以产生用于抑制由频率源的操作导致的杂散的抵消信号。 调整消除信号的幅度和相位延迟以最大限度地消除杂散信号的消除。 优选地，执行校准程序以建立适当的延迟和幅度值以抵消在每个设备增益设置处发生的杂散。

公开(公告)号：US08514595B1

公开(公告)日：2013-08-20

申请号：US12534996

申请日：2009-08-04

申请人： Paul J. Husted ,  Richard T. Chang

发明人： Paul J. Husted ,  Richard T. Chang

IPC分类号： H02J1/02

CPC分类号： H02M1/44

摘要： Methods of calibrating and operating a switching power supply in an electronic system are disclosed. A switching power supply is calibrated to determine a switching frequency. Harmonic frequencies that are multiples of the switching frequency are determined. A further determination is made as to whether any of the harmonic frequencies falls within one of one or more frequency bands of interest. A second switching frequency is determined such that none of its corresponding harmonic frequencies falls within a frequency band of interest. During operation of the system, the switching power supply is configured to operate at the second switching frequency if operation occurs within one of the frequency bands of interest.

摘要翻译： 公开了一种在电子系统中校准和操作开关电源的方法。 开关电源被校准以确定开关频率。 确定开关频率倍数的谐波频率。 进一步确定任何谐波频率是否落入一个或多个感兴趣频带中的一个。 确定第二切换频率，使得其相应的谐波频率中没有一个落入感兴趣的频带内。 在系统运行期间，如果在感兴趣的频带之一内发生操作，则开关电源被配置为以第二开关频率工作。