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    • 76. 发明申请
    • SYSTEM AND METHOD FOR COMMUNICATING USING AN IN-VEHICLE SYSTEM
    • 使用车载系统进行通信的系统和方法
    • US20100067439A1
    • 2010-03-18
    • US12538742
    • 2009-08-10
    • Sean SimmonsStefan E. JanhunenDavid S. Furbeck
    • Sean SimmonsStefan E. JanhunenDavid S. Furbeck
    • H04W40/00
    • H04L27/0008H03M13/09H03M13/13H04L1/0003H04L1/0009H04L1/0061H04L1/1671H04L1/1819H04L1/1896H04L27/265Y02D50/10
    • A system and method for communicating wirelessly from a mobile device to a remote receiver station is disclosed. The system includes a controller configured to monitor a status of the mobile device and, upon an initiation event, initiate a data transfer process to wirelessly communicate data to the remote receiver station. The system also includes a voice-band modem that, upon initiation of the data transfer process. The voice-band modem is configured to receive data for transfer to the remote receiver station, encode the data to form a series of encoded packets, and transmit the encoded packets to the remote receiver station using a first modulation scheme. Thereafter, unless an indication that the series of packets has been received by at the receiving station is provided, the voice-band modem automatically retransmit the encoded packets to the remote receiver station using a second modulation scheme.
    • 公开了一种用于从移动设备到远程接收站的无线通信的系统和方法。 该系统包括控制器,其被配置为监视移动设备的状态,并且在启动事件时启动数据传送处理以将数据无线地传送到远程接收站。 该系统还包括在数据传输过程开始时的语音频带调制解调器。 语音频带调制解调器被配置为接收用于传送到远程接收机站的数据,对数据进行编码以形成一系列编码分组,并且使用第一调制方案将编码分组发送到远程接收机站。 此后,除非提供在接收站已经接收到一系列分组的指示,否则语音频带调制解调器使用第二调制方案自动地将经编码的分组重传到远程接收机站。
    • 77. 发明授权
    • Wireless communications device including a joint demodulation filter for co-channel interference reduction and related methods
    • 包括用于同信道干扰减少的联合解调滤波器和相关方法的无线通信设备
    • US07639763B2
    • 2009-12-29
    • US11466568
    • 2006-08-23
    • Zoltan KemenczyHuan WuSean Simmons
    • Zoltan KemenczyHuan WuSean Simmons
    • H04B1/10H04L27/06
    • H04L25/0328H04L25/03292H04L25/03299
    • A wireless communications device may include a housing and a wireless transmitter and a wireless receiver carried by the housing. The wireless receiver may include a joint demodulation filter for reducing co-channel interference between a desired signal and a co-channel interfering signal which may include an input receiving samples of the desired signal and the co-channel interfering signal, a Viterbi decoder, and a first signal path between the input and the Viterbi decoder comprising a first filter. The joint demodulation filter may further include a second signal path between the input and the Viterbi decoder and comprising a linear finite impulse response (FIR) modeler for generating a channel impulse response estimate for the co-channel interfering signal. Additionally, a third signal path may be between the input and the Viterbi decoder and include a whitened matched filter for generating a channel impulse response estimate for the desired signal.
    • 无线通信设备可以包括外壳和由外壳承载的无线发射器和无线接收器。 无线接收机可以包括联合解调滤波器,用于减少期望信号和同信道干扰信号之间的同信道干扰,该信道干扰信号可以包括接收期望信号和同信道干扰信号的采样的输入,维特比解码器和 输入和维特比解码器之间的第一信号路径包括第一滤波器。 联合解调滤波器还可以包括在输入和维特比解码器之间的第二信号路径,并且包括用于产生同信道干扰信号的信道脉冲响应估计的线性有限脉冲响应(FIR)建模器。 此外,第三信号路径可以在输入和维特比解码器之间,并且包括用于产生期望信号的信道脉冲响应估计的白化匹配滤波器。
    • 79. 发明申请
    • MULTIPLE CLOCK SIGNAL GENERATION FROM A COMMON OSCILLATOR
    • 来自普通振荡器的多个时钟信号产生
    • US20090231188A1
    • 2009-09-17
    • US12046701
    • 2008-03-12
    • Mamdouh YANNISean SIMMONS
    • Mamdouh YANNISean SIMMONS
    • H04B7/185
    • H03J1/005H03J7/065H03J2200/11H03L7/23
    • A system and method of providing a clock signal to a navigation satellite receiver in a device is disclosed. A clock signal generated by a voltage controlled temperature compensated crystal oscillator (VCTCXO) in a cellular engine of the same device is appropriated to clock a numerically controlled oscillator (NCO) programmed to generate an adjusted clock signal suitable for use in receiving signals from navigation satellites and to heterodyne them down to baseband or an intermediate frequency for processing. Preferably, if the cellular engine has an automatic frequency control (AFC) module for adjusting the voltage control input to the VCTCXO to compensate for a change in the operating environment of the cellular engine, the AFC module modifies the control word in the NCO to counteract such adjustment so that the adjusted clock signal provided to the navigation satellite receiver is not unduly impacted. The use of the NCO ensures that the adjusted clock signal remains phase continuous throughout any such adjustments, so that positional lock of the navigation satellite receiver should not be lost. The sharing of the VCTCXO by the cellular engine and the navigation satellite receiver results in component cost and board space savings, economy in power consumption and reduced engineering effort in routing clock signals throughout the circuit board.
    • 公开了一种向设备中的导航卫星接收机提供时钟信号的系统和方法。 由相同设备的蜂窝引擎中的电压控制温度补偿晶体振荡器(VCTCXO)产生的时钟信号适用于编程的数控振荡器(NCO),以产生适用于接收来自导航卫星的信号的调整时钟信号 并将它们外差到基带或中频进行处理。 优选地,如果蜂窝引擎具有用于调整对VCTCXO的电压控制输入的自动频率控制(AFC)模块以补偿蜂窝引擎的操作环境的变化,则AFC模块修改NCO中的控制字以抵消 这样的调整使得提供给导航卫星接收机的经调整的时钟信号不会受到不适当的影响。 使用NCO确保调整后的时钟信号在任何这样的调整中保持相位连续,使得导航卫星接收机的位置锁不应丢失。 通过蜂窝引擎和导航卫星接收机共享VCTCXO可以节省部件成本和电路板空间,节省电力消耗,并减少整个电路板上的时钟信号布线工作。
    • 80. 发明申请
    • ROOT MEDIAN SQUARE POWER MEASUREMENT
    • ROOT MEDIAN SQUARE功率测量
    • US20090187380A1
    • 2009-07-23
    • US12412975
    • 2009-03-27
    • Phat TranXing QianSean SimmonsJonathan Swoboda
    • Phat TranXing QianSean SimmonsJonathan Swoboda
    • G06F17/18
    • H04B17/318
    • A handheld computing device comprises a data processor configured to allocate a set of measurements of a wireless signal amongst partitions of a hierarchical multi-level partition space. Each level has a plurality of the partitions. Each partition has a respective numerical range, and the value of each allocated measurement is within one of the ranges. One of the measurements allocated to one of the partitions has a desired rank. This partition encompasses the range of all the partitions in the immediately lower level. Each partition in the immediately lower level has a desired resolution for the allocated measurements. The data processor sums the number of measurements allocated to each respective partition in the immediately lower level until the desired rank is obtained. The numerical range of the partition in this lower level that is associated with the desired rank comprises an estimate of a characteristic of the wireless signal.
    • 手持计算设备包括数据处理器,其被配置为在分级多级分区空间的分区之间分配无线信号的一组测量结果。 每个级别都有多个分区。 每个分区具有相应的数值范围,并且每个分配的测量的值在一个范围内。 分配给其中一个分区的测量中的一个具有期望的等级。 该分区包含紧邻较低级别的所有分区的范围。 紧邻较低级别的每个分区具有所分配测量的期望分辨率。 数据处理器将分配给紧邻较低级别中的每个相应分区的测量次数相加,直到获得期望的等级。 与所需等级相关联的该较低级别中的分区的数值范围包括对无线信号的特性的估计。