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1. 发明授权

US06785349B1 Correlation based method of determining frame boundaries of data frames that are periodically extended 失效
公开(公告)号：US06785349B1
公开(公告)日：2004-08-31
申请号：US09321993
申请日：1999-05-28
申请人： John R. Rosenlof , Kevin J. Smart , John B. Dougall, Jr.
发明人： John R. Rosenlof , Kevin J. Smart , John B. Dougall, Jr.
IPC分类号： H03D100
CPC分类号： H04L25/03159 , H04L27/2656 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L2025/03624
摘要： A correlator for use in a timing recovery apparatus of a receiver in a multicarrier transmission system. The correlator locates the beginning of a data frame and initializes a pointer register with an address to a location within the receive signal buffer. Data is transferred to a signal converter from the receive signal buffer where the samples that are fed into the converter are determined by the address stored in the pointer register.

2. 发明授权

US07379514B2 Phase advance compensation for MIMO time-switch preamble modes 有权
标题翻译： MIMO时间切换前导码模式的相位提前补偿
公开(公告)号：US07379514B2
公开(公告)日：2008-05-27
申请号：US11046085
申请日：2005-01-28
申请人： John R. Rosenlof , Kirupairaj Asirvatham , Srikanth Gummadi
发明人： John R. Rosenlof , Kirupairaj Asirvatham , Srikanth Gummadi
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04L27/2675 , H04L2027/003
摘要： A communications receiver is provided that includes a first and second compensators a pilot tracker and a demodulator. The first compensator is operable to adjust an input signal based on both a coarse frequency offset and a fine frequency offset to produce an adjusted input signal. The pilot tracker determines an estimated residual frequency offset based on at least a portion of the adjusted input signal. The demodulator determines at least a first symbol sequence and a second symbol sequence based on the adjusted input signal. The second compensator is operable to adjust the first symbol sequence and the second symbol sequence based on the estimate residual frequency offset.
摘要翻译：提供一种通信接收机，其包括第一和第二补偿器，导频跟踪器和解调器。第一补偿器可操作以基于粗频率偏移和精细频率偏移来调整输入信号以产生经调整的输入信号。导频跟踪器基于经调整的输入信号的至少一部分来确定估计的残余频率偏移。解调器基于经调整的输入信号确定至少第一符号序列和第二符号序列。第二补偿器可操作以基于估计残余频率偏移来调整第一符号序列和第二符号序列。

3. 发明授权

US06898210B1 System and method for providing a local area network utilizing remote transceivers 有权
标题翻译：使用远程收发器提供局域网的系统和方法
公开(公告)号：US06898210B1
公开(公告)日：2005-05-24
申请号：US09584650
申请日：2000-05-31
申请人： Yaqi Cheng , Richard G. C. Williams , John R. Rosenlof , A. Joseph Mueller
发明人： Yaqi Cheng , Richard G. C. Williams , John R. Rosenlof , A. Joseph Mueller
IPC分类号： H04L12/28 , H04M11/06 , H04J1/00
CPC分类号： H04L12/2838 , H04L12/2803 , H04M11/062
摘要： A system and method for providing a local area network utilizing discrete multitone transceivers includes at least two discrete multitone transceivers each of which may be capable of communicating with the central office and with other discrete multitone transceivers in communication with the local area network. The local area network utilizes a set of carriers coordinated between the first discrete multitone transceiver and the second discrete multitone transceiver providing a communication link between the first discrete multitone transceiver and the second discrete multitone transceiver.
摘要翻译：用于使用离散多音收发器提供局域网的系统和方法包括至少两个离散多音收发器，每个离散多音收发器可能能够与中心局以及与局域网通信的其他离散多音收发器进行通信。局域网利用在第一离散多音收发器和第二离散多音收发器之间协调的一组载波，提供第一离散多音收发器和第二离散多音收发器之间的通信链路。

4. 发明授权

US07184721B2 Transmit power control in a wireless communication device 有权
标题翻译：在无线通信设备中发射功率控制
公开(公告)号：US07184721B2
公开(公告)日：2007-02-27
申请号：US10799849
申请日：2004-03-11
申请人： Kirupairaj Asirvatham , John R. Rosenlof
发明人： Kirupairaj Asirvatham , John R. Rosenlof
IPC分类号： H03C1/62 , H04B17/00
CPC分类号： H04W52/52 , H03G3/3042 , H04B17/14 , H04B17/18
摘要： A method and apparatus permit a wireless communication device to be calibrated during manufacturing and subsequently re-calibrated while in use to correct for the effects of temperature changes on transmit power.
摘要翻译：一种方法和装置允许在制造期间校准无线通信设备，并且随后在使用时重新校准，以校正温度变化对发射功率的影响。

5. 发明授权

US06546056B1 Timing recovery in a multi-tone modem 失效
标题翻译：多音调制解调器的定时恢复
公开(公告)号：US06546056B1
公开(公告)日：2003-04-08
申请号：US09321992
申请日：1999-05-28
申请人： John R. Rosenlof
发明人： John R. Rosenlof
IPC分类号： H04K110
CPC分类号： H04L27/2662 , H04L27/2675
摘要： A timing recovery apparatus for use in a receiver in a multicarrier transmission system is provided. The apparatus includes a receive signal buffer, a pointer register containing an address to a location within the receive signal buffer, a time to frequency domain signal converter, a digital filter, and a control circuit. The signal converter accepts data from the receive signal buffer. The samples that are fed into the converter are determined by an address stored in the pointer register. The digital filter is connected to the converter, and is essentially a bank of single-tap filters. One of the converter outputs corresponds to a pilot tone, and thus the digital filter provides a filtered pilot tone. The phase of the pilot is also examined, preferably by examining the filter tap corresponding to the pilot. The control circuit accepts the pilot phase signal and responsively updates the pointer register. Alternatively, the control circuit updates the pointer register by deriving a phase signal directly from the relevant converter bin.
摘要翻译：提供了一种用于多载波传输系统中的接收机中的定时恢复装置。该装置包括接收信号缓冲器，包含地址到接收信号缓冲器内的位置的指针寄存器，时域到频域信号转换器，数字滤波器和控制电路。信号转换器接收来自接收信号缓冲器的数据。馈入转换器的样本由存储在指针寄存器中的地址确定。数字滤波器连接到转换器，并且本质上是单抽头滤波器组。其中一个转换器输出对应于导频音，因此数字滤波器提供滤波后的导频音。还检查飞行员的相位，优选地通过检查对应于飞行员的滤波器抽头。控制电路接受导频相位信号并响应更新指针寄存器。或者，控制电路通过从相关转换器仓直接导出相位信号来更新指针寄存器。

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