公开(公告)号：DE60129945D1

公开(公告)日：2007-09-27

申请号：DE60129945

申请日：2001-03-23

Applicant: ATHEROS COMM INC

Inventor： TEHRANI ARDAVAN M ,  GILBERT JEFFREY M ,  MCFARLAND WILLIAM J ,  THON LARS E ,  WANG YI-HSIU ,  THOMSON JOHN S ,  HUSTED PAUL J

IPC: H04L1/00 ,  H03M13/25 ,  H03M13/41 ,  H04J11/00 ,  H04L25/03 ,  H04L25/06 ,  H04L27/38

Abstract: 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.

公开(公告)号：AU4370701A

公开(公告)日：2001-10-08

申请号：AU4370701

申请日：2001-03-23

Applicant: ATHEROS COMM INC

Inventor： TEHRANI ARDAVAN M ,  GILBERT JEFFREY M ,  MCFARLAND WILLIAM J ,  THON LARS E ,  WANG YI-HSIU ,  THOMSON JOHN S ,  HUSTED PAUL J

IPC: H03M13/25 ,  H03M13/41 ,  H04J11/00 ,  H04L1/00 ,  H04L27/38 ,  H04L25/06 ,  H04L25/03

Abstract: 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.

公开(公告)号：AT370566T

公开(公告)日：2007-09-15

申请号：AT01916721

申请日：2001-03-23

Applicant: ATHEROS COMM INC

Inventor： TEHRANI ARDAVAN ,  GILBERT JEFFREY ,  MCFARLAND WILLIAM ,  THON LARS ,  WANG YI-HSIU ,  THOMSON JOHN ,  HUSTED PAUL

IPC: H04L1/00 ,  H03M13/25 ,  H03M13/41 ,  H04J11/00 ,  H04L25/03 ,  H04L25/06 ,  H04L27/38

Abstract: 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.

公开(公告)号：WO2004075458B1

公开(公告)日：2005-05-19

申请号：PCT/US2004003468

申请日：2004-02-06

Applicant: ATHEROS COMM INC ,  WANG YI-HSIU

Inventor： WANG YI-HSIU

IPC: G01S1/00 ,  H04L12/28 ,  H04W64/00 ,  G01S3/02

CPC classification number: H04W4/02 ,  G01S5/12 ,  G01S5/14 ,  G01S19/05 ,  G01S19/06 ,  G01S19/252 ,  G01S19/28 ,  G01S19/29 ,  G01S19/48 ,  H04B7/1851 ,  H04W64/00 ,  H04W84/12 ,  H04W88/08

Abstract: Accurate position capability can be quickly provided using a Wireless Local Area Network (WLAN). When associated with a WLAN, a wireless device (102) can quickly determine its relative and/or coordinate position based on information provided by an access point (101) in the WLAN. Before the wireless device (102) disassociates with the access point (101), the WLAN can periodically provide time, location, and decoded GPS data to the wireless device (101). In this manner, the wireless device (102) can significantly reduce the time to acquire the necessary GPS satellite data to determine its coordinate position.

Abstract translation: 可以使用无线局域网（WLAN）快速提供准确的位置能力。 当与WLAN相关联时，无线设备（102）可以基于由WLAN中的接入点（101）提供的信息来快速地确定其相对和/或坐标位置。 在无线设备（102）与接入点（101）分离之前，WLAN可以周期性地向无线设备（101）提供时间，位置和解码的GPS数据。 以这种方式，无线设备（102）可以显着地减少获取必要的GPS卫星数据以确定其坐标位置的时间。

公开(公告)号：WO2005029749A3

公开(公告)日：2007-01-18

申请号：PCT/US2004030315

申请日：2004-09-15

Applicant: ATHEROS COMM INC ,  CHOI WON-JOON ,  GILBERT JEFFREY M ,  WANG YI-HSIU ,  ZHANG XIAORU

Inventor： CHOI WON-JOON ,  GILBERT JEFFREY M ,  WANG YI-HSIU ,  ZHANG XIAORU

IPC: H04K1/10 ,  H04L27/26

CPC classification number: H04L25/0232 ,  H04L1/0045 ,  H04L27/2647

Abstract: Spurs cause significant problems with signal detecting, amplifier gain adjustment, and signal decoding. Various techniques can be used to mitigate the effects of spurs on a received signal. Generally, these techniques work by either canceling or ignoring the spurs. For example, a pilot mask can be used to ignore pilot information in one or more sub-channels. A Viterbi mask can determine the weighting given to bits in a sub-channel based on spur and data rate information. Channel interpolation can compute a pseudo channel estimate for a sub-channel known to have a spur location can be computed by interpolating the channel estimates of adjacent good sub-channels. Filtering of the received signal using a low-pass filter, a growing box filter, or a low-pass filter with self-correlation can be used to cancel a spur.

Abstract translation: 马刺引起信号检测，放大器增益调整和信号解码的重大问题。 可以使用各种技术来减轻杂散对接收信号的影响。 一般来说，这些技术可以取消或忽略杂散。 例如，可以使用导频掩码来忽略一个或多个子信道中的导频信息。 维特比掩码可以基于分支和数据速率信息来确定子信道中的比特的加权。 可以通过内插相邻的良好子信道的信道估计来计算已知具有支路位置的子信道的信道内插可以计算伪信道估计。 使用低通滤波器，增长盒滤波器或具有自相关的低通滤波器对接收信号进行滤波可用于取消杂散。

公开(公告)号：WO2004075458A3

公开(公告)日：2005-03-24

申请号：PCT/US2004003468

申请日：2004-02-06

Applicant: ATHEROS COMM INC ,  WANG YI-HSIU

Inventor： WANG YI-HSIU

IPC: G01S1/00 ,  H04L12/28 ,  H04W64/00 ,  G01S3/02

CPC classification number: H04W4/02 ,  G01S5/12 ,  G01S5/14 ,  G01S19/05 ,  G01S19/06 ,  G01S19/252 ,  G01S19/28 ,  G01S19/29 ,  G01S19/48 ,  H04B7/1851 ,  H04W64/00 ,  H04W84/12 ,  H04W88/08

Abstract: Accurate position capability can be quickly provided using a Wireless Local Area Network (WLAN). When associated with a WLAN, a wireless device (102) can quickly determine its relative and/or coordinate position based on information provided by an access point (101) in the WLAN. Before the wireless device (102) disassociates with the access point (101), the WLAN can periodically provide time, location, and decoded GPS data to the wireless device (101). In this manner, the wireless device (102) can significantly reduce the time to acquire the necessary GPS satellite data to determine its coordinate position.

Abstract translation: 使用无线局域网（WLAN）可以快速提供准确的定位能力。 当与WLAN相关联时，无线设备（102）可以基于由WLAN中的接入点（101）提供的信息来快速确定其相对和/或坐标位置。 在无线设备（102）与接入点（101）分离之前，WLAN可以周期性地向无线设备（101）提供时间，位置和解码的GPS数据。 以这种方式，无线设备（102）可以显着减少获取必要的GPS卫星数据以确定其坐标位置的时间。