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21. 发明授权

US07333788B2 Method for calibrating automatic gain control in wireless devices 有权
标题翻译：校准无线设备自动增益控制的方法
公开(公告)号：US07333788B2
公开(公告)日：2008-02-19
申请号：US10735380
申请日：2003-12-12
申请人： Henry S. Eilts , Srinath Hosur
发明人： Henry S. Eilts , Srinath Hosur
IPC分类号： H04B17/02 , H04B1/06
CPC分类号： H04W52/52
摘要： Disclosed herein is an iterative process for calibrating an AGC in a wireless system, wherein the iterative process includes transmitting a calibration signal, receiving the calibration signal, decoding the calibration signal to produce a measurement, storing the measurement and changing an AGC gain setting.
摘要翻译：这里公开了一种用于校准无线系统中的AGC的迭代过程，其中迭代过程包括发送校准信号，接收校准信号，解码校准信号以产生测量值，存储测量值并改变AGC增益设置。

22. 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。

23. 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。

24. 发明申请

US20060008023A1 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：US20060008023A1
公开(公告)日：2006-01-12
申请号：US10886480
申请日：2004-07-07
申请人： David Magee , Srinath Hosur
发明人： David Magee , Srinath Hosur
IPC分类号： H04B7/02
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。

25. 发明申请

US20060007908A1 Linearly independent preambles for MIMO channel estimation with backward compatibility 有权
公开(公告)号：US20060007908A1
公开(公告)日：2006-01-12
申请号：US10884363
申请日：2004-07-02
申请人： Srinath Hosur , Michael Polley , Manish Goel
发明人： Srinath Hosur , Michael Polley , Manish Goel
IPC分类号： H04J3/06 , H04L12/28
CPC分类号： H04L1/0083 , H04B7/0678 , H04L7/041 , H04L7/06 , H04L27/2613
摘要： A device and a method of characterizing a communications channel. The method includes transmitting a first part of a packet preamble using two or more antennas and transmitting a second part of the packet preamble using the two or more antennas. Each antenna transmits an orthogonal encoding of the second part of the packet preamble. The method also includes transmitting a packet header using the two or more antennas and transmitting a packet payload using the two or more antennas. Each antenna transmits an orthogonal encoding of the packet header. The packet payload may be encoded across the transmissions of the two or more antennas.

26. 发明申请

US20050163041A1 Hybrid IMMSE-LMMSE receiver processing technique and apparatus for a MIMO WLAN 有权
标题翻译：用于MIMO WLAN的混合IMMSE-LMMSE接收机处理技术和装置
公开(公告)号：US20050163041A1
公开(公告)日：2005-07-28
申请号：US10765009
申请日：2004-01-26
申请人： Muhammad Ikram , Srinath Hosur , Michael Polley , Manish Goel
发明人： Muhammad Ikram , Srinath Hosur , Michael Polley , Manish Goel
IPC分类号： H04B1/707 , H04B7/02 , H04J11/00 , H04L27/26
CPC分类号： H04B7/02 , H04B1/7105 , H04B1/7107 , H04L1/0631 , H04L1/0656 , H04L27/2647
摘要： A Hybrid IMMSE-LMMSE receiver processing technique predicts performance of and selects between iterative and non-iterative decoding of symbols based on an intelligent metric. Based on a pre-specified criterion, the receiver determines if a correct first-stage decision is made or not. If a correct decision is made, then it follows iterative processing like in BLAST. Alternatively, if a wrong decision is found to have occurred, the receiver resorts to LMMSE estimation processing.
摘要翻译：混合IMMSE-LMMSE接收机处理技术基于智能度量预测符号的迭代和非迭代解码之间的性能并进行选择。根据预先指定的标准，接收机确定是否做出正确的第一阶段决定。如果做出正确的决定，那么它将像BLAST一样进行迭代处理。或者，如果发现错误的决定已经发生，接收机将采用LMMSE估计处理。

27. 发明申请

US20050054313A1 Scalable and backwards compatible preamble for OFDM systems 有权
标题翻译： OFDM系统的可扩展和向后兼容的前导码
公开(公告)号：US20050054313A1
公开(公告)日：2005-03-10
申请号：US10811519
申请日：2004-03-29
申请人： Srikanth Gummadi , Srinath Hosur , Peter Murphy
发明人： Srikanth Gummadi , Srinath Hosur , Peter Murphy
IPC分类号： H04B17/00 , H03C7/02 , H04B1/02 , H04B7/02
CPC分类号： H04B7/028 , H04B17/20
摘要： A method comprising encoding a plurality of signals according to a predetermined negation scheme and transmitting the plurality of signals, wherein each signal is transmitted by way of a wireless channel. The method further comprises receiving a signal, wherein the received signal is a combination of the plurality of transmitted signals, and interpolating between data in the received signal to generate a plurality of systems of equations. The method further comprises solving the plurality of systems of equations to determine a gain and phase shift applied to each of the plurality of transmitted signals by a corresponding wireless channel.
摘要翻译：一种方法，包括根据预定的否定方案对多个信号进行编码并发送多个信号，其中每个信号通过无线信道发送。该方法还包括接收信号，其中所接收的信号是多个发射信号的组合，并且在接收信号中的数据之间进行内插以产生多个方程组。该方法还包括解决多个等式系统以通过相应的无线信道确定应用于多个发射信号中的每一个的增益和相移。

28. 发明授权

US06483821B1 CDMA mobile communications system and method with improved channel estimation and pilot symbol transmission 有权
标题翻译： CDMA移动通信系统和方法，具有改进的信道估计和导频符号传输
公开(公告)号：US06483821B1
公开(公告)日：2002-11-19
申请号：US09294722
申请日：1999-04-19
申请人： Anand G. Dabak , Srinath Hosur , Timothy Schmidl
发明人： Anand G. Dabak , Srinath Hosur , Timothy Schmidl
IPC分类号： H04Q700
CPC分类号： H04L25/0228 , H04B1/7115 , H04B1/712 , H04B2201/70701 , H04L1/20 , H04L25/0204 , H04L25/0236
摘要： The present invention is an improved system and method for transmitting and receiving digital information over mobile communication channels. The present invention includes an enhanced channel estimator (34) which iteratively estimates channel amplitude and phase distortion from received pilot and data signal information at various time instants. The iterative channel estimation scheme of the present invention provides increased performance of the transceiver system which allows for efficiencies such as transmission of a minimal amount of pilot information and reduction in the transmitted power.
摘要翻译：本发明是一种用于通过移动通信信道发送和接收数字信息的改进的系统和方法。本发明包括增强信道估计器（34），其在不同的时刻迭代地估计来自接收到的导频的信道幅度和相位失真以及数据信号信息。本发明的迭代信道估计方案提供了收发机系统的增加的性能，其允许诸如传输最小量的导频信息和减少发射功率的效率。

29. 发明授权

US06356605B1 Frame synchronization in space time block coded transmit antenna diversity for WCDMA 有权
标题翻译：用于WCDMA的空间时间块编码发射天线分集的帧同步
公开(公告)号：US06356605B1
公开(公告)日：2002-03-12
申请号：US09195942
申请日：1998-11-19
申请人： Srinath Hosur , Anand G. Dabak
发明人： Srinath Hosur , Anand G. Dabak
IPC分类号： H04B710
CPC分类号： H04B7/0845 , H04B1/707 , H04B7/06 , H04L1/0625
摘要： A circuit is designed with a correction circuit (350) coupled to receive a first estimate signal (&agr;j1), a second estimate signal (&agr;j2), and a plurality of input signals from an external source along plural signal paths. The plurality of input signals includes a first and a second input signal (Rj1, Rj2) The correction circuit produces a first symbol estimate in response to the first and second estimate signals and the first and second input signals. The correction circuit produces a second symbol estimate in response to the first and second estimate signals and the first and second input signals. A combining circuit is coupled to receive a plurality of first symbol estimates including the first symbol estimate and a plurality of second symbol estimates including the second symbol estimate. The combining circuit produces a first symbol signal ({tilde over (S)}1) in response to the plurality of first symbol estimates and a second symbol signal ({tilde over (S)}2) in response to the plurality of second symbol estimates. A synchronization circuit (408) is coupled to receive the first and second symbol signals (400-406) and a first known symbol and a second known symbol (410-416). The synchronization circuit produces a synchronization signal (418) in response to an approximate match between the first symbol signal and the first known symbol and between the second symbol signal and the second known symbol.
摘要翻译：电路被设计成具有被耦合以从多个信号路径从外部源接收第一估计信号（alphaj1），第二估计信号（alphaj2）以及多个输入信号的校正电路（350）。所述多个输入信号包括第一和第二输入信号（Rj1，Rj2）。所述校正电路响应于所述第一和第二估计信号以及所述第一和第二输入信号而产生第一符号估计。校正电路响应于第一和第二估计信号以及第一和第二输入信号产生第二符号估计。组合电路被耦合以接收包括第一符号估计的多个第一符号估计和包括第二符号估计的多个第二符号估计。响应于多个第一符号估计，组合电路响应于多个第二符号估计而产生第一符号信号（（S）} 1）和第二符号信号（（S）} 2）估计。耦合同步电路（408）以接收第一和第二符号信号（400-406）和第一已知符号和第二已知符号（410-416）。响应于第一符号信号和第一已知符号之间以及第二符号信号和第二已知符号之间的近似匹配，同步电路产生同步信号（418）。

30. 发明授权

US08923362B2 Wireless communications system with secondary synchronization code based on values in primary synchronization code 有权
公开(公告)号：US08923362B2
公开(公告)日：2014-12-30
申请号：US13403201
申请日：2012-02-23
申请人： Anand G. Dabak , Sundararajan Sriram , Srinath Hosur
发明人： Anand G. Dabak , Sundararajan Sriram , Srinath Hosur
IPC分类号： H04B1/69 , H04B1/707 , H04B1/713 , H04B1/7083 , H04B1/7073 , H04J13/00 , H04J13/12
CPC分类号： H04B1/7083 , H04B1/70735 , H04J13/00 , H04J13/12
摘要： A wireless communication system. The system comprises transmitter circuitry (BST1), the transmitter circuitry comprising encoder circuitry (50) for transmitting a plurality of frames (FR). Each of the plurality of frames comprises a primary synchronization code (PCS) and a second synchronization code (SSC). The encoder circuitry comprises of circuitry (501) for providing the primary synchronization code in response to a first sequence (32). The encoder circuitry further comprises circuitry (502) for providing the secondary synchronization code in response to a second sequence (54) and a third sequence (56). The second sequence is selected from a plurality of sequences. Each of the plurality of sequences is orthogonal with respect to all other sequences. The third sequence is a subset of bits from the first sequence.

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