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    • 2. 发明申请
    • DETECTION OF FALSIFIED WIRELESS ACCESS POINTS
    • 检测无线接入点
    • WO2010078578A3
    • 2010-10-07
    • PCT/US2010020114
    • 2010-01-05
    • QUALCOMM INCAGGARWAL ALOKHARDIE EDWARD THOMAS LINGHAMDAS SAUMITRA MOHANGUPTA RAJARSHINAGUIB AYMAN FAWZY
    • AGGARWAL ALOKHARDIE EDWARD THOMAS LINGHAMDAS SAUMITRA MOHANGUPTA RAJARSHINAGUIB AYMAN FAWZY
    • H04L29/06
    • H04W12/12H04L63/1466H04W24/08
    • Apparatuses and methods for detecting falsified wireless access points are presented. A method includes identifying a target wireless access point for validation and measuring a round trip time delay to the wireless access point. The method also includes determining an expected processing delay of the wireless access point, analyzing the measured round trip time delay and the expected processing delay, and validating the wireless access point based upon the analysis. An apparatus includes a wireless transceiver, a processing unit coupled to the wireless transceiver, and a memory coupled to the processing unit. The processing unit is configured to identify a target wireless access point for validation, measure a round trip time delay to the wireless access point, determine an expected processing delay of the wireless access point, analyze the measured round trip time delay and the expected processing delay, and validate the wireless access point based upon the analysis.
    • 提出了用于检测伪造的无线接入点的设备和方法。 一种方法包括识别用于验证的目标无线接入点并测量到无线接入点的往返时间延迟。 该方法还包括确定无线接入点的预期处理延迟,分析所测量的往返时间延迟和预期处理延迟,以及基于分析来验证无线接入点。 一种装置包括无线收发器,耦合到无线收发器的处理单元和耦合到处理单元的存储器。 处理单元被配置为识别用于验证的目标无线接入点,测量到无线接入点的往返时间延迟,确定无线接入点的预期处理延迟,分析所测量的往返时间延迟和预期处理延迟 ,并根据分析验证无线接入点。
    • 4. 发明申请
    • MIMO PREAMBLE FOR INITIAL ACCESS WITH AN UNKNOWN NUMBER OF TRANSMIT ANTENNAS
    • 用于初始接入发射天线的MIMO前缀
    • WO2010033411A1
    • 2010-03-25
    • PCT/US2009/056423
    • 2009-09-10
    • QUALCOMM IncorporatedDAYAL, PranavNAGUIB, Ayman Fawzy
    • DAYAL, PranavNAGUIB, Ayman Fawzy
    • H04B7/06
    • H04B7/0667H04L27/261
    • For certain embodiments, a preamble sequence associated with a particular number of transmit antennas may allow a receiving mobile station to determine the number of transmit antennas used for transmission. The preamble sequence may be selected from one of a set of Constant Amplitude and Zero Auto Correlation (CAZAC) sequences corresponding to all of the supported number of transmit antennas. As a result, a receiving station may be able to determine the sequence sent by correlation and, thereby determine the number of antennas used for transmission. Given the number of transmit antennas, the mobile station may then perform MIMO channel estimation during initial synchronization to recover the channel taps between each transmit and each receive antenna.
    • 对于某些实施例,与特定数量的发射天线相关联的前同步码序列可以允许接收移动台确定用于传输的发射天线的数量。 前导码序列可以从对应于所有支持的发射天线数量的一组恒定幅度和零自相关(CAZAC)序列之一中选择。 结果,接收站可以能够确定通过相关发送的序列,从而确定用于传输的天线的数量。 给定发射天线的数量,移动台然后可以在初始同步期间执行MIMO信道估计,以恢复每个发射天线和每个接收天线之间的信道抽头。