公开(公告)号：US06967998B1

公开(公告)日：2005-11-22

申请号：US09438988

申请日：1999-11-12

申请人： Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

发明人： Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

IPC分类号： H04B7/26 ,  H04B17/00 ,  H04W28/04 ,  H04L1/20

CPC分类号： H04B17/327 ,  H04B17/309

摘要： In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.

摘要翻译： 在无线通信中，需要监控通信信道的传输质量，保持系统的性能和运行。 本发明提供了一种在接收机中测量信道中的比特错误率的方法，而不会通过将质量监视数据插入到发射机的信号中来减少信道吞吐量。

公开(公告)号：US06597922B1

公开(公告)日：2003-07-22

申请号：US09312262

申请日：1999-05-14

申请人： Fuyun Ling ,  Jack Holtzman ,  Charles E. Wheatley, III ,  Tao Chen ,  Edward G. Tiedemann ,  Gilbert Leung

发明人： Fuyun Ling ,  Jack Holtzman ,  Charles E. Wheatley, III ,  Tao Chen ,  Edward G. Tiedemann ,  Gilbert Leung

IPC分类号： H04B700

CPC分类号： H04W52/225 ,  H04W36/0094 ,  H04W52/40 ,  H04W52/42

摘要： A method and apparatus for efficient candidate frequency search while initiating a handoff in a code division multiple access communication system. The method includes when the pilot signal is transmitted by the mobile station that is power controlled to a target receive level, the traffic channel power level is increased relative to the pilot channel to improve receiver performance. An improved feature is that the received pilot received at the base station stays the same while the receiver receives extra energy in the redundant traffic symbols received to enhance the probability of correctly decoding the received frame. The base station detects the absence of the mobile station transmitted signal from the frequency of interest. If the base station is aware of the starting time and duration of the absence, it can focus its detection during this predetermined time period. The performance can be improved if the absence of the signal is spread across two frames at the frame boundary.

摘要翻译： 一种用于在码分多址通信系统中发起切换的有效候选频率​​搜索的方法和装置。 该方法包括当导频信号由被功率控制到目标接收电平的移动台发送时，业务信道功率电平相对于导频信道增加，以提高接收机性能。 改进的特征是在基站处接收到的接收到的导频保持相同，而接收机在接收到的冗余业务符号中接收到额外的能量以增强正确解码接收帧的概率。 基站从感兴趣的频率检测到不存在移动台发送的信号。 如果基站知道不存在的起始时间和持续时间，则可以在该预定时间段内集中其检测。 如果没有信号在帧边界的两个帧上扩展，则可以提高性能。

公开(公告)号：US07106791B2

公开(公告)日：2006-09-12

申请号：US11217948

申请日：2005-08-31

申请人： Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

发明人： Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

IPC分类号： H04L1/20

CPC分类号： H04B17/327 ,  H04B17/309

摘要： In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.

公开(公告)号：US20060007989A1

公开(公告)日：2006-01-12

申请号：US11217948

申请日：2005-09-01

申请人： Tao Chen ,  Fuyun Ling ,  Edward Tiedemann

发明人： Tao Chen ,  Fuyun Ling ,  Edward Tiedemann

IPC分类号： H04B1/69 ,  H04B17/00

CPC分类号： H04B17/327 ,  H04B17/309

摘要： In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.

公开(公告)号：US07643546B2

公开(公告)日：2010-01-05

申请号：US11498287

申请日：2006-08-01

申请人： Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

发明人： Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

IPC分类号： H04L1/20

CPC分类号： H04B17/327 ,  H04B17/309

摘要： In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.

摘要翻译： 在无线通信中，需要监控通信信道的传输质量，保持系统的性能和运行。 本发明提供了一种在接收机中测量信道中的比特错误率的方法，而不会通过将质量监视数据插入到发射机的信号中来减少信道吞吐量。

公开(公告)号：US20060268968A1

公开(公告)日：2006-11-30

申请号：US11498287

申请日：2006-08-01

申请人： Tao Chen ,  Fuyun Ling ,  Edward Tiedemann

发明人： Tao Chen ,  Fuyun Ling ,  Edward Tiedemann

IPC分类号： H04B17/00

CPC分类号： H04B17/327 ,  H04B17/309

摘要： In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.

摘要翻译： 在无线通信中，需要监控通信信道的传输质量，保持系统的性能和运行。 本发明提供了一种在接收机中测量信道中的比特错误率的方法，而不会通过将质量监视数据插入到发射机的信号中来减少信道吞吐量。

公开(公告)号：US07085239B2

公开(公告)日：2006-08-01

申请号：US09755245

申请日：2001-01-05

申请人： Fuyun Ling ,  Tao Chen

发明人： Fuyun Ling ,  Tao Chen

IPC分类号： G01R31/08 ,  H04B7/216

CPC分类号： H04W52/12 ,  H04W52/143 ,  H04W52/20 ,  H04W52/225 ,  H04W52/42

摘要： A novel and improved method and apparatus for performing closed loop forward link power control using a selected dedicated and power controlled forward link signal is described. A “Selected Signal Bit Error Rate” (SSBER) is estimated, where each selected signal “bit” consists of a number selected signal chips distributed over a frame. In addition, the method estimates the normalized variance of the signal energy (or C/I) for each packet. The average number of fingers in lock is also used to determine the power control set point.

公开(公告)号：US06782277B1

公开(公告)日：2004-08-24

申请号：US09409944

申请日：1999-09-30

申请人： Tao Chen ,  Fuyun Ling ,  Jack Holtzman ,  Yu-Cheun Jou ,  Stein A. Lundby

发明人： Tao Chen ,  Fuyun Ling ,  Jack Holtzman ,  Yu-Cheun Jou ,  Stein A. Lundby

IPC分类号： H04B138

CPC分类号： H01Q3/2605 ,  H01Q1/246 ,  H04B7/0408 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/086

摘要： A method and apparatus for wireless communications wherein a base station transmits a signal to sending data to a subscriber station through a signal beam that sweeps through the coverage area of the base station. User data addressed to the subscriber station is buffered until the signal beam angle of the signal beam allows efficient transmission. The base station may alter the beam sweep speed or the shape of the beam's radiation pattern over time to maximize system efficiency and capacity.

摘要翻译： 一种用于无线通信的方法和装置，其中基站通过扫描基站的覆盖区域的信号波束发送信号以向用户站发送数据。 寻址到用户站的用户数据被缓冲，直到信号波束的信号波束角允许有效的传输。 基站可以随时间改变光束扫描速度或光束辐射图的形状，以最大化系统效率和容量。

公开(公告)号：US20100093387A1

公开(公告)日：2010-04-15

申请号：US12636497

申请日：2009-12-11

申请人： Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

发明人： Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

IPC分类号： H04B7/00 ,  H04B17/00

CPC分类号： H04W52/12 ,  H04L1/0051 ,  H04L1/0066 ,  H04L1/208 ,  H04W52/20 ,  H04W52/36

摘要： Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.

摘要翻译： 调整无线通信系统中功率控制回路设定值的技术。 可以基于指示擦除/良好解码帧的帧状态来调整设定点，指示解码结果的置信度的一个或多个（通常为软）度量，指示接收信号质量与设定点之间的差异的功率余量/ ，表示设定值与所需性能水平所需的阈值Eb / Nt之间的差异的设定值剩余/缺失，或其组合。 度量可以包括重新编码的符号错误率，重新编码的功率度量，修改的Yamamoto度量，解码比特中的最小或平均LLR，解码迭代次数，以及可能的其他值。 可以根据上述因素以不同的方式和/或不同的量调节设定点。 这些技术可以用于CDMA系统中的前向和/或反向链路。

公开(公告)号：US07117017B2

公开(公告)日：2006-10-03

申请号：US10454063

申请日：2003-06-03

申请人： Tao Chen ,  Fuyun Ling ,  Jack Holtzman ,  Yu-Cheun Jou ,  Stein A. Lundby

发明人： Tao Chen ,  Fuyun Ling ,  Jack Holtzman ,  Yu-Cheun Jou ,  Stein A. Lundby

IPC分类号： H04B1/38

CPC分类号： H01Q3/2605 ,  H01Q1/246 ,  H04B7/0408 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/086

摘要： A method and apparatus for wireless communications wherein a base station transmits a signal to sending data to a subscriber station through a signal beam that sweeps through the coverage area of the base station. User data addressed to the subscriber station is buffered until the signal beam angle of the signal beam allows efficient transmission. The base station may alter the beam sweep speed or the shape of the beam's radiation pattern over time to maximize system efficiency and capacity.