公开(公告)号：US20080144731A1

公开(公告)日：2008-06-19

申请号：US11982422

申请日：2007-10-31

申请人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

发明人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

IPC分类号： H04K1/10

CPC分类号： H04W56/00 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/023 ,  H04L5/1453 ,  H04L27/0014 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L2027/0055 ,  H04L2027/0083

摘要： A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to the clock signal. The communications system also includes a receiver for receiving the OFDM/DMT symbols from the transmission medium. The receiver demodulates the received symbols using at least one timing signal. The receiver has a first pilot tone search mode of operation in which the receiver adjusts its timing signal to scan the frequency range of the predetermined number of bins looking for the pilot tone sub-symbol and identifies the bin including the pilot tone sub-symbol. The receiver further has a subsequent second pilot tone acquisition mode in which the receiver adjusts the timing signal to receive the identified bin containing the pilot tone sub-symbol and measures phase differences between successive pilot tone sub-symbols to thereby perform a further adjustment of the timing signal so that the pilot tone sub-symbol is received within a frequency range sufficient for subsequent phase locked loop processing thereof.

摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括用于通过传输介质在预定数量的箱上发送OFDM / DMT符号的发射机。 使用至少一个定时信号来生成OFDM / DMT符号。 预定数量的箱中的至少一个包括具有对应于时钟信号的频率的导频音子符号。 通信系统还包括用于从传输介质接收OFDM / DMT符号的接收机。 接收机使用至少一个定时信号来解调所接收的符号。 接收机具有第一导频音搜索操作模式，其中接收机调整其定时信号以扫描寻找导频音子符号的预定数量的频道的频率范围，并识别包括导频音子符号的音箱。 接收机还具有随后的第二导频音调获取模式，其中接收机调整定时信号以接收包含导频音符号的识别的小区，并且测量连续的导频音子符号之间的相位差，从而进一步调整 定时信号，使得在对其后续的锁相环处理足够的频率范围内接收导频音子符号。

公开(公告)号：US20120219044A1

公开(公告)日：2012-08-30

申请号：US13406955

申请日：2012-02-28

申请人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

发明人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

IPC分类号： H04B1/38

CPC分类号： H04W56/00 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/023 ,  H04L5/1453 ,  H04L27/0014 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L2027/0055 ,  H04L2027/0083

摘要： A multi-point communications system is set forth herein. The communications system includes a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to a clock signal. The communications system may also include a receiver for receiving the OFDM/DMT symbols via the transmission medium. The receiver demodulates the received symbols using at least one timing signal.

摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括用于在传输介质上经过预定数量的箱传输OFDM / DMT符号的发射机。 使用至少一个定时信号来生成OFDM / DMT符号。 预定数量的箱中的至少一个包括具有对应于时钟信号的频率的导频音子符号。 通信系统还可以包括用于经由传输介质接收OFDM / DMT符号的接收机。 接收机使用至少一个定时信号来解调所接收的符号。

公开(公告)号：US07613102B2

公开(公告)日：2009-11-03

申请号：US11982422

申请日：2007-10-31

申请人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

发明人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

IPC分类号： H04J11/00

CPC分类号： H04W56/00 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/023 ,  H04L5/1453 ,  H04L27/0014 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L2027/0055 ,  H04L2027/0083

摘要： A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to the clock signal. The communications system also includes a receiver for receiving the OFDM/DMT symbols from the transmission medium. The receiver demodulates the received symbols using at least one timing signal. The receiver has a first pilot tone search mode of operation in which the receiver adjusts its timing signal to scan the frequency range of the predetermined number of bins looking for the pilot tone sub-symbol and identifies the bin including the pilot tone sub-symbol. The receiver further has a subsequent second pilot tone acquisition mode in which the receiver adjusts the timing signal to receive the identified bin containing the pilot tone sub-symbol and measures phase differences between successive pilot tone sub-symbols to thereby perform a further adjustment of the timing signal so that the pilot tone sub-symbol is received within a frequency range sufficient for subsequent phase locked loop processing thereof.

公开(公告)号：US06771590B1

公开(公告)日：2004-08-03

申请号：US09665225

申请日：2000-09-18

申请人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

发明人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

IPC分类号： H04J1100

CPC分类号： H04W56/00 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/023 ,  H04L5/1453 ,  H04L27/0014 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L2027/0055 ,  H04L2027/0083

摘要： A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to the clock signal. The communications system also includes a receiver for receiving the OFDM/DMT symbols from the transmission medium. The receiver demodulates the received symbols using at least one timing signal. The receiver has a first pilot tone search mode of operation in which the receiver adjusts its timing signal to scan the frequency range of the predetermined number of bins looking for the pilot tone sub-symbol and identifies the bin including the pilot tone sub-symbol. The receiver further has a subsequent second pilot tone acquisition mode in which the receiver adjusts the timing signal to receive the identified bin containing the pilot tone sub-symbol and measures phase differences between successive pilot tone sub-symbols to thereby perform a further adjustment of the timing signal so that the pilot tone sub-symbol is received within a frequency range sufficient for subsequent phase locked loop processing thereof.

摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括用于通过传输介质在预定数量的箱上发送OFDM / DMT符号的发射机。 使用至少一个定时信号来生成OFDM / DMT符号。 预定数量的箱中的至少一个包括具有对应于时钟信号的频率的导频音子符号。 通信系统还包括用于从传输介质接收OFDM / DMT符号的接收机。 接收机使用至少一个定时信号来解调所接收的符号。 接收机具有第一导频音搜索操作模式，其中接收机调整其定时信号以扫描寻找导频音子符号的预定数量的频道的频率范围，并识别包括导频音子符号的音箱。 接收机还具有随后的第二导频音调获取模式，其中接收机调整定时信号以接收包含导频音符号的识别的小区，并且测量连续的导频音子符号之间的相位差，从而进一步调整 定时信号，使得在对其后续的锁相环处理足够的频率范围内接收导频音子符号。

公开(公告)号：US20100104035A1

公开(公告)日：2010-04-29

申请号：US12587694

申请日：2009-10-09

申请人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

发明人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

IPC分类号： H04L1/02

CPC分类号： H04W56/00 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/023 ,  H04L5/1453 ,  H04L27/0014 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L2027/0055 ,  H04L2027/0083

摘要： A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to the clock signal. The communications system also includes a receiver for receiving the OFDM/DMT symbols from the transmission medium. The receiver demodulates the received symbols using at least one timing signal. The receiver has a first pilot tone search mode of operation in which the receiver adjusts its timing signal to scan the frequency range of the predetermined number of bins looking for the pilot tone sub-symbol and identifies the bin including the pilot tone sub-symbol. The receiver further has a subsequent second pilot tone acquisition mode in which the receiver adjusts the timing signal to receive the identified bin containing the pilot tone sub-symbol and measures phase differences between successive pilot tone sub-symbols to thereby perform a further adjustment of the timing signal so that the pilot tone sub-symbol is received within a frequency range sufficient for subsequent phase locked loop processing thereof.

摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括用于通过传输介质在预定数量的箱上发送OFDM / DMT符号的发射机。 使用至少一个定时信号来生成OFDM / DMT符号。 预定数量的箱中的至少一个包括具有对应于时钟信号的频率的导频音子符号。 通信系统还包括用于从传输介质接收OFDM / DMT符号的接收机。 接收机使用至少一个定时信号来解调所接收的符号。 接收机具有第一导频音搜索操作模式，其中接收机调整其定时信号以扫描寻找导频音子符号的预定数量的频道的频率范围，并识别包括导频音子符号的音箱。 接收机还具有随后的第二导频音调获取模式，其中接收机调整定时信号以接收包含导频音符号的识别的小区，并且测量连续的导频音子符号之间的相位差，从而进一步调整 定时信号，使得在对其后续的锁相环处理足够的频率范围内接收导频音子符号。

公开(公告)号：US08665859B2

公开(公告)日：2014-03-04

申请号：US13406955

申请日：2012-02-28

申请人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

发明人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

IPC分类号： H04J3/06 ,  H04W56/00

CPC分类号： H04W56/00 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/023 ,  H04L5/1453 ,  H04L27/0014 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L2027/0055 ,  H04L2027/0083

摘要： A multi-point communications system is set forth herein. The communications system includes a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to a clock signal. The communications system may also include a receiver for receiving the OFDM/DMT symbols via the transmission medium. The receiver demodulates the received symbols using at least one timing signal.

摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括用于在传输介质上经过预定数量的箱传输OFDM / DMT符号的发射机。 使用至少一个定时信号来生成OFDM / DMT符号。 预定数量的箱中的至少一个包括具有对应于时钟信号的频率的导频音子符号。 通信系统还可以包括用于经由传输介质接收OFDM / DMT符号的接收机。 接收机使用至少一个定时信号来解调所接收的符号。

公开(公告)号：US6122246A

公开(公告)日：2000-09-19

申请号：US900312

申请日：1997-07-25

申请人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

发明人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

IPC分类号： H04L5/02 ,  H04L27/26 ,  H04M11/06 ,  H04B3/10

CPC分类号： H04L5/023 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L5/1453

摘要： A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to the clock signal. The communications system also includes a receiver for receiving the OFDM/DMT symbols from the transmission medium. The receiver demodulates the received symbols using at least one timing signal. The receiver has a first pilot tone search mode of operation in which the receiver adjusts its timing signal to scan the frequency range of the predetermined number of bins looking for the pilot tone sub-symbol and identifies the bin including the pilot tone sub-symbol. The receiver further has a subsequent second pilot tone acquisition mode in which the receiver adjusts the timing signal to receive the identified bin containing the pilot tone sub-symbol and measures phase differences between successive pilot tone sub-symbols to thereby perform a further adjustment of the timing signal so that the pilot tone sub-symbol is received within a frequency range sufficient for subsequent phase locked loop processing thereof.

公开(公告)号：US08139471B2

公开(公告)日：2012-03-20

申请号：US12587694

申请日：2009-10-09

申请人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

发明人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

IPC分类号： H04J11/00

CPC分类号： H04W56/00 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/023 ,  H04L5/1453 ,  H04L27/0014 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L2027/0055 ,  H04L2027/0083

摘要： A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to the clock signal. The communications system also includes a receiver for receiving the OFDM/DMT symbols from the transmission medium. The receiver demodulates the received symbols using at least one timing signal. The receiver has a first pilot tone search mode of operation in which the receiver adjusts its timing signal to scan the frequency range of the predetermined number of bins looking for the pilot tone sub-symbol and identifies the bin including the pilot tone sub-symbol. The receiver further has a subsequent second pilot tone acquisition mode in which the receiver adjusts the timing signal to receive the identified bin containing the pilot tone sub-symbol and measures phase differences between successive pilot tone sub-symbols to thereby perform a further adjustment of the timing signal so that the pilot tone sub-symbol is received within a frequency range sufficient for subsequent phase locked loop processing thereof.

摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括用于通过传输介质在预定数量的箱上发送OFDM / DMT符号的发射机。 使用至少一个定时信号来生成OFDM / DMT符号。 预定数量的箱中的至少一个包括具有对应于时钟信号的频率的导频音子符号。 通信系统还包括用于从传输介质接收OFDM / DMT符号的接收机。 接收机使用至少一个定时信号来解调所接收的符号。 接收机具有第一导频音搜索操作模式，其中接收机调整其定时信号以扫描寻找导频音子符号的预定数量的频道的频率范围，并识别包括导频音子符号的音箱。 接收机还具有随后的第二导频音调获取模式，其中接收机调整定时信号以接收包含导频音符号的识别的小区，并且测量连续的导频音子符号之间的相位差，从而进一步调整 定时信号，使得在对其后续的锁相环处理足够的频率范围内接收导频音子符号。

公开(公告)号：US07616553B2

公开(公告)日：2009-11-10

申请号：US10813695

申请日：2004-03-29

申请人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

发明人： Daniel J. Marchok ,  Samir Kapoor ,  Ravi Chandran

IPC分类号： H04J11/00

CPC分类号： H04W56/00 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/023 ,  H04L5/1453 ,  H04L27/0014 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L2027/0055 ,  H04L2027/0083

摘要： A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to the clock signal. The communications system also includes a receiver for receiving the OFDM/DMT symbols from the transmission medium. The receiver demodulates the received symbols using at least one timing signal. The receiver has a first pilot tone search mode of operation in which the receiver adjusts its timing signal to scan the frequency range of the predetermined number of bins looking for the pilot tone sub-symbol and identifies the bin including the pilot tone sub-symbol. The receiver further has a subsequent second pilot tone acquisition mode in which the receiver adjusts the timing signal to receive the identified bin containing the pilot tone sub-symbol and measures phase differences between successive pilot tone sub-symbols to thereby perform a further adjustment of the timing signal so that the pilot tone sub-symbol is received within a frequency range sufficient for subsequent phase locked loop processing thereof.

摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括用于通过传输介质在预定数量的箱上发送OFDM / DMT符号的发射机。 使用至少一个定时信号来生成OFDM / DMT符号。 预定数量的箱中的至少一个包括具有对应于时钟信号的频率的导频音子符号。 通信系统还包括用于从传输介质接收OFDM / DMT符号的接收机。 接收机使用至少一个定时信号来解调所接收的符号。 接收机具有第一导频音搜索操作模式，其中接收机调整其定时信号以扫描寻找导频音子符号的预定数量的频道的频率范围，并识别包括导频音子符号的音箱。 接收机还具有随后的第二导频音调获取模式，其中接收机调整定时信号以接收包含导频音符号的识别的小区，并且测量连续的导频音子符号之间的相位差，从而进一步调整 定时信号，使得在对其后续的锁相环处理足够的频率范围内接收导频音子符号。

公开(公告)号：US06671667B1

公开(公告)日：2003-12-30

申请号：US09536583

申请日：2000-03-28

申请人： Ravi Chandran ,  Bruce E. Dunne ,  Daniel J. Marchok

发明人： Ravi Chandran ,  Bruce E. Dunne ,  Daniel J. Marchok

IPC分类号： G10L1902

CPC分类号： G10L25/78 ,  G10L21/0208 ,  G10L21/0232 ,  G10L21/0264 ,  G10L2025/783

摘要： In order to enhance the quality of a communication signal derived from speech and noise, the likelihood that the communication signals result from at least some speech is determined. A calculator calculates a first power signal representing the power of at least a portion of the communication signals estimated over a first time period and calculates a second power signal representing the power of at least a portion of the communication signals estimated over a second time period longer than the first time period. The calculator also generates a comparison signal having a value related to the likelihood that the portion of the communication signals result from at least some speech by comparing a first expression involving the first power signal with a second expression involving the second power signal. The calculator also generates a speech likelihood signal having a value representing a first likelihood that the communication signal results from at least some speech in the event that the comparison signal value falls within a first range and having a second value representing a second likelihood that the communication signal results from at least some speech in the event that the comparison signal value falls within a second range. The second likelihood is different from the first likelihood.

摘要翻译： 为了提高从语音和噪声导出的通信信号的质量，确定了至少一些语音产生通信信号的可能性。 计算器计算表示在第一时间周期估计的通信信号的至少一部分的功率的第一功率信号，并且计算表示在第二时间段内估计的至少一部分通信信号的功率的第二功率信号 比第一个时期。 计算器还生成比较信号，其具有与通过将包含第一功率信号的第一表达与涉及第二功率信号的第二表达进行比较，从至少一些语音产生通信信号的部分的可能性的值。 计算器还产生语音似然信号，该语音似然信号具有表示在比较信号值落在第一范围内并且具有表示第二可能性的第二值的通信信号从至少一些语音产生的第一可能性的值， 在比较信号值落在第二范围的情况下，来自至少一些语音的信号。 第二种可能性与第一种可能性不同。