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1. 发明授权

US07187734B2 Method of slip compensation for integer frequency offset correction in a wireless communication system 有权
标题翻译：无线通信系统中整数频偏校正的滑差补偿方法
公开(公告)号：US07187734B2
公开(公告)日：2007-03-06
申请号：US10438243
申请日：2003-05-14
申请人： David P. Magee , Srinath Hosur , Manish Goel
发明人： David P. Magee , Srinath Hosur , Manish Goel
IPC分类号： H03D1/04 , H04J1/00
CPC分类号： H04L27/2662 , H04L27/261 , H04L27/2659 , H04L27/2675
摘要： A method of correctly estimating the frequency offset when the CPE modem has already acquired and is tracking the OFDM burst boundaries in an OFDM-based, wireless communication system. CPS data in an OFDM-based, wireless communication system is modulated as QPSK data in the training tones of the data burst. As long as some bursts have the CPS data modulation and some bursts do not have the CPS data modulation, the CPS data can be recovered. A slip results when there is a linear phase difference across the tones (after the FFT) between the current and the previous burst. This linear phase difference is generally taken care of by the channel estimation obtained using the pilot tones. This phase difference is however, now compensated for correct frequency offset estimation which occurs before the channel estimation and CPS decoding steps.
摘要翻译：一种在CPE调制解调器已经获取并正在跟踪基于OFDM的无线通信系统中的OFDM突发边界时正确估计频率偏移的方法。基于OFDM的无线通信系统中的CPS数据被调制为数据突发的训练音调中的QPSK数据。只要某些突发具有CPS数据调制，并且一些突发没有CPS数据调制，则可以恢复CPS数据。当当前和前一个脉冲串之间的音调（在FFT之后）存在线性相位差时，会产生滑动。这种线性相位差通常由使用导频音获得的信道估计来处理。然而，该相位差现在被补偿在信道估计和CPS解码步骤之前发生的正确的频率偏移估计。

2. 发明授权

US07184499B2 Method of timing compensation for OFDM-based wireless communication system coded parameter signaling (CPS) decode operations 有权
标题翻译：基于OFDM的无线通信系统编码参数信令（CPS）解码操作的定时补偿方法
公开(公告)号：US07184499B2
公开(公告)日：2007-02-27
申请号：US10438242
申请日：2003-05-14
申请人： David P. Magee , Srinath Hosur , Manish Goel
发明人： David P. Magee , Srinath Hosur , Manish Goel
IPC分类号： H03D1/04
CPC分类号： H04L27/2662 , H04L27/2675
摘要： A method of determining CPS data in an OFDM-based, wireless communication system resolves the phase angle difference between training tones in a burst without CPS data and training tones in a burst with CPS data and then demodulates the resulting difference phase angles to determine the CPS data. The method achieves timing correction/compensation in CPS decode operations associated with OFDM-based, wireless communication systems.
摘要翻译：一种在基于OFDM的无线通信系统中确定CPS数据的方法，用CPS数据解析突发中没有CPS数据和训练音调的脉冲串中的训练音之间的相位角差，然后解调得到的差相位角以确定CPS 数据。该方法在与基于OFDM的无线通信系统相关联的CPS解码操作中实现定时校正/补偿。

3. 发明授权

US07324602B2 Scalable time-orthogonal preamble supplement generator, method of generating and multiple-input, multiple-output communication system employing the generator and method 有权
标题翻译：可扩展时间正交前导码补充生成器，生成和多输入方法，采用发生器和方法的多输出通信系统
公开(公告)号：US07324602B2
公开(公告)日：2008-01-29
申请号：US10886480
申请日：2004-07-07
申请人： David P. Magee , Srinath Hosur
发明人： David P. Magee , Srinath Hosur
IPC分类号： H04L1/02
CPC分类号： H04B7/0413 , H04B7/10 , H04L25/0204 , H04L25/0226 , H04L27/2613
摘要： The present invention provides a time-orthogonal preamble supplement generator for use with a multiple-input, multiple-output (MIMO) transmitter employing N transmit antennas, where N is at least two. In one embodiment, the time-orthogonal preamble supplement generator includes an initial preamble supplement encoder configured to provide a preamble supplement to each of the N transmit antennas during an initial time interval. The time-orthogonal preamble supplement generator also includes a subsequent preamble supplement encoder coupled to the initial preamble supplement encoder and configured to provide the preamble supplement or a negation thereof to the N transmit antennas during (N−1) subsequent time intervals.
摘要翻译：本发明提供了一种与采用N个发射天线的多输入多输出（MIMO）发射机一起使用的时间正交前导码补充生成器，其中N是至少两个。在一个实施例中，时间正交前导码补充生成器包括初始前导码补充编码器，其被配置为在初始时间间隔期间向N个发射天线中的每一个提供前导码补充。时间正交前导码补充生成器还包括耦合到初始前导码补充编码器并被配置为在（N-1）个后续时间间隔期间向N个发送天线提供前导补充或否定的后续前导码补充编码器。

4. 发明授权

US06917311B2 Orthogonal preamble encoder, method of encoding orthogonal preambles and multiple-input, multiple-output communication system employing the same 有权
标题翻译：正交前导编码器，正交前导码的编码方法和采用该正交前导码的多输入多输出通信系统
公开(公告)号：US06917311B2
公开(公告)日：2005-07-12
申请号：US10639418
申请日：2003-08-11
申请人： Srinath Hosur , Anuj Batra , Srikanth Gummadi , David P. Magee
发明人： Srinath Hosur , Anuj Batra , Srikanth Gummadi , David P. Magee
IPC分类号： H03M7/00 , H04B7/04 , H04L1/00 , H04L1/06 , H04L25/02 , H04L27/26
CPC分类号： H04L1/0078 , H04B7/04 , H04L1/06 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L27/2613
摘要： For use with a multiple-input, multiple-output (MIMO) transmitter, an orthogonal preamble encoder, a method of encoding orthogonal preambles and a communication system incorporating the encoder or the method. In one embodiment, the encoder includes: (1) a preamble supplement generator configured to provide a first long sequence preamble supplement to a first transmit antenna of the MIMO transmitter and (2) a preamble supplement coordinator coupled to the preamble supplement generator and configured to provide a second long sequence preamble supplement to a second transmit antenna of the MIMO transmitter, at least a portion of the second long sequence preamble supplement being a negation of the first long sequence preamble supplement.
摘要翻译：用于多输入多输出（MIMO）发射机，正交前导码编码器，对正交前导码进行编码的方法和结合编码器的通信系统或方法。在一个实施例中，所述编码器包括：（1）前导码补充生成器，被配置为向所述MIMO发射机的第一发射天线提供第一长序列前导码补充，以及（2）前缀补充协调器，其耦合到所述前导码补充生成器，向所述MIMO发射机的第二发射天线提供第二长序列前导码补充，所述第二长序列前同步码补码的至少一部分是所述第一长序列前同步码补码的否定。

5. 发明授权

US07382832B2 Scalable time-switched preamble supplement generator, method of generating and multiple-input, multiple-output communication system employing the generator and method 有权
标题翻译：可扩展时间切换前导码补充生成器，生成和多输入方法，采用发生器和方法的多输出通信系统
公开(公告)号：US07382832B2
公开(公告)日：2008-06-03
申请号：US10903668
申请日：2004-07-30
申请人： David P. Magee , Srinath Hosur , Michael O. Polley , Srikanth Gummadi
发明人： David P. Magee , Srinath Hosur , Michael O. Polley , Srikanth Gummadi
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/04 , H04B7/0669 , H04B7/0671
摘要： The present invention provides a time-switched preamble supplement generator for use with a multiple-input, multiple-output (MIMO) transmitter employing N transmit antennas wherein N is at least two. In one embodiment, the time-switched preamble supplement generator includes an initial preamble supplement formatter configured to provide a first permutation of a set of preamble supplements to the N transmit antennas during an initial time interval. The first permutation includes a single first preamble supplement and at least one second preamble supplement. The time-switched preamble supplement generator also includes a subsequent preamble supplement formatter coupled to the initial preamble supplement formatter and configured to provide (N−1) mutually exclusive further permutations of the set to the N transmit antennas during (N−1) subsequent time intervals.
摘要翻译：本发明提供了一种与使用N个发射天线的多输入多输出（MIMO）发射机一起使用的时间切换前导码补充生成器，其中N是至少两个。在一个实施例中，时间切换前导码补充生成器包括初始前导码补充格式化器，被配置为在初始时间间隔期间向N个发射天线提供一组前导码补充的第一置换。第一排列包括单个第一前序补码和至少一个第二前序补码。所述时间切换前导码补充生成器还包括后续前导码补充格式化器，其耦合到所述初始前导码补充格式器，并且被配置为在（N-1）个后续时间期间向所述N个发射天线提供所述集合的（N-1）个互斥另外的排列间隔

6. 发明授权

US07864661B2 Time-switched preamble generator, method of generating and multiple-input, multiple-output communication system employing the generator and method 有权
标题翻译：时间切换前导码生成器，生成和多输入方法，采用发生器和方法的多输出通信系统
公开(公告)号：US07864661B2
公开(公告)日：2011-01-04
申请号：US10755603
申请日：2004-01-12
申请人： Srinath Hosur , Srikanth Gummadi , Anuj Batra , David P. Magee
发明人： Srinath Hosur , Srikanth Gummadi , Anuj Batra , David P. Magee
IPC分类号： H04J11/00
CPC分类号： H04W88/08
摘要： The present invention is directed to a time-switched preamble generator and method of generating a time-switched preamble for use with a multiple-input, multiple-output (MIMO) transmitter employing first and second transmit antennas. In one embodiment, the time-switched preamble generator includes an initial preamble formatter configured to provide a first preamble to the first transmit antenna and a second preamble to the second transmit antenna during an initial time interval. The time-switched preamble generator also includes a subsequent preamble formatter coupled to the initial preamble formatter and configured to provide the second preamble to the first transmit antenna and the first preamble to the second transmit antenna during a subsequent time interval.
摘要翻译：本发明涉及一种时间切换前导码生成器和用于与采用第一和第二发射天线的多输入多输出（MIMO）发射机一起使用的时间切换前同步码的方法。在一个实施例中，时间切换前导码生成器包括初始前同步码格式器，其被配置为在初始时间间隔期间向第一发射天线提供第一前同步码和第二前导码到第二发射天线。时间切换前导码生成器还包括后续前导码格式器，其耦合到初始前导码格式化器并且被配置为在随后的时间间隔期间向第一发射天线提供第二前同步码和第一前导码到第二发射天线。

7. 发明授权

US07231184B2 Low overhead transmit channel estimation 有权
标题翻译：低开销传输信道估计
公开(公告)号：US07231184B2
公开(公告)日：2007-06-12
申请号：US10730242
申请日：2003-12-05
申请人： Henry S. Eilts , Srinath Hosur , David P. Magee
发明人： Henry S. Eilts , Srinath Hosur , David P. Magee
IPC分类号： H04B17/00
CPC分类号： H04L25/0202
摘要： A transmit channel (gt1, h, gr2) through which a first wireless communication transceiver is to transmit to a second wireless communication transceiver can be estimated using information indicative of a relationship between the transmit channel and a receive channel (gt2, h, gr1) through which the first wireless communication transceiver receives communications from the second wireless communication transceiver. The relationship information (35) is combined (37) with further information (31) to produce an estimate of the transmit channel.
摘要翻译：可以使用表示第一无线通信收发器的信息的信息来估计第一无线通信收发器要向第二无线通信收发器发送的发送信道（g t1，h，g t2，h，g ）。关系信息（35）与另外的信息（31）组合（37）以产生发送信道的估计。

8. 发明授权

US08306167B2 Method of synchronization for packet based, OFDM wireless systems with multiple receive chains 有权
标题翻译：具有多个接收链的基于分组的OFDM无线系统的同步方法
公开(公告)号：US08306167B2
公开(公告)日：2012-11-06
申请号：US12261240
申请日：2008-10-30
申请人： Michael D. Direnzo , David P. Magee , Manish Goel
发明人： Michael D. Direnzo , David P. Magee , Manish Goel
IPC分类号： H04L1/02 , H04L7/00 , H04L27/28
CPC分类号： H04L7/042 , H04L1/06 , H04L7/10 , H04L27/2662 , H04L27/2675
摘要： A system for synchronizing a wireless receiver is provided. The system includes a first antenna and a second antenna to receive independent wireless signals containing different combination of data packets. The system includes one or more analyzer components operable to determine correlation metrics based on at least a portion of the first received signal and a portion of the second received signal. The system further includes a synchronization component operable to use the correlation metrics to determine a preferred correlation metric for synchronization by the wireless receiver of the first and second received signals to decode the data packet. A method for synchronizing a receiver of two wireless signals is also provided.
摘要翻译：提供了一种用于同步无线接收机的系统。该系统包括第一天线和第二天线，用于接收包含不同数据分组组合的独立无线信号。该系统包括一个或多个分析器组件，其可操作以基于第一接收信号的至少一部分和第二接收信号的一部分来确定相关度量。所述系统还包括可操作以使用所述相关度量来确定所述无线接收机对所述第一和第二接收信号进行同步的优选相关度量以对所述数据分组进行解码的同步分量。还提供了一种用于同步两个无线信号的接收机的方法。

9. 发明申请

US20090052433A1 METHOD OF SYNCHRONIZATION FOR PACKET BASED, OFDM WIRELESS SYSTEMS WITH MULTIPLE RECEIVE CHAINS 有权
标题翻译：具有多个接收链的基于分组的OFDM无线系统的同步方法
公开(公告)号：US20090052433A1
公开(公告)日：2009-02-26
申请号：US12261240
申请日：2008-10-30
申请人： Michael T. DiRenzo , David P. Magee , Manish Goel
发明人： Michael T. DiRenzo , David P. Magee , Manish Goel
IPC分类号： H04J3/06
CPC分类号： H04L7/042 , H04L1/06 , H04L7/10 , H04L27/2662 , H04L27/2675
摘要： A system for synchronizing a wireless receiver is provided. The system includes a first antenna and a second antenna to receive independent wireless signals containing different combination of data packets. The system includes one or more analyzer components operable to determine correlation metrics based on at least a portion of the first received signal and a portion of the second received signal. The system further includes a synchronization component operable to use the correlation metrics to determine a preferred correlation metric for synchronization by the wireless receiver of the first and second received signals to decode the data packet. A method for synchronizing a receiver of two wireless signals is also provided.
摘要翻译：提供了一种用于同步无线接收机的系统。该系统包括第一天线和第二天线，用于接收包含不同数据分组组合的独立无线信号。该系统包括一个或多个分析器组件，其可操作以基于第一接收信号的至少一部分和第二接收信号的一部分来确定相关度量。所述系统还包括可操作以使用所述相关度量来确定所述无线接收机对所述第一和第二接收信号进行同步的优选相关度量以对所述数据分组进行解码的同步分量。还提供了一种用于同步两个无线信号的接收机的方法。

10. 发明授权

US07746962B2 Apparatus and method of detection for a packet-based wireless receiver employing multiple, concurrent transmitted streams 有权
标题翻译：采用多个并发传输流的基于分组的无线接收机的检测装置和方法
公开(公告)号：US07746962B2
公开(公告)日：2010-06-29
申请号：US10992404
申请日：2004-11-17
申请人： Michael T. DiRenzo , David P. Magee , Manish Goel
发明人： Michael T. DiRenzo , David P. Magee , Manish Goel
IPC分类号： H04L27/06
CPC分类号： H04L7/042 , H04B1/708 , H04B1/7093
摘要： The present invention provides a packet detector for use with a packet-based wireless receiver employing a receive antenna for P concurrently transmitted streams, where P is at least two. In one embodiment, the packet detector includes a correlation unit coupled to the single receive antenna and configured to provide a correlation function based on P acquisition fields corresponding to the P concurrently transmitted streams. Additionally, the packet detector also includes a pseudo-magnitude calculator coupled to the correlation unit and configured to calculate a packet detection metric based on the correlation function.
摘要翻译：本发明提供了一种与用于P并发传输流的接收天线的基于分组的无线接收机一起使用的分组检测器，其中P是至少两个。在一个实施例中，分组检测器包括耦合到单个接收天线的相关单元，并且被配置为基于与P个同时发送的流相对应的P采集字段提供相关函数。另外，分组检测器还包括耦合到相关单元并被配置为基于相关函数计算分组检测度量的伪幅度计算器。

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