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1.发明授权公开(公告)号：US06373832B1
公开(公告)日：2002-04-16
申请号：US09108775
申请日：1998-07-02
IPC分类号： H04B7216
CPC分类号： H04B7/0671
摘要： A system, a transceiver, and methods for code division multiple access (CDMA) communication. The system includes first and second code division multiple access transceivers. The first code division multiple access transceiver has a plurality antennas disposed to provide transmission via a plurality of paths and the second code division multiple access transceiver has a rake arrangement for processing a plurality of signals received at the rake arrangement with differing delays or other characteristics. A driving arrangement is provided for causing the first code division multiple access transceiver to use a relative few, e.g., one, of the plurality of antennas. When, however, an indication is obtained that an adequate number of resolvable signals are likely not received at the rake arrangement of the second transceiver, a circuit switches the driving arrangement to cause the first transceiver to use more of the plurality of antennas. In one implementation, the second transceiver sends a feedback signal indicating the number of useful signals being received and the first transceiver responds to the feedback signal by selecting and using a desirable number of transmit antennas. In an implementation suitable for a time-division duplexing (TDD) communication system, the first transceiver obtains the indication by inference from the fact that it is not receiving an adequate plurality of resolvable signals from the second transceiver. When the first transceiver obtains the indication, it drives the increased number of antennas either with respective delays or with different codes of the CDMA type.
摘要翻译： 一种用于码分多址（CDMA）通信的系统，收发机和方法。 该系统包括第一和第二码分多址收发器。 第一码分多址收发器具有设置成经由多个路径提供传输的多个天线，并且第二码分多址收发器具有用于处理具有不同延迟或其他特性的在前置放置处接收的多个信号的前置放置装置。 提供驱动装置，用于使第一码分多址收发器使用多个天线中相对较少的例如一个天线。 然而，当获得在第二收发器的前置放置时可能没有接收到足够数量的可解析信号的指示时，电路切换驱动装置以使得第一收发器使用多个天线中的更多的天线。 在一个实现中，第二收发器发送指示正在接收的有用信号的数量的反馈信号，并且第一收发器通过选择和使用期望数量的发射天线来响应于反馈信号。 在适用于时分双工（TDD）通信系统的实施例中，第一收发机从不从第二收发器接收到足够多的可解析信号的事实通过推断获得指示。 当第一收发器获得指示时，它以相应的延迟或CDMA类型的不同码来驱动增加的天线数量。
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2.发明授权
公开(公告)号：US6067292A
公开(公告)日：2000-05-23
申请号：US841316
申请日：1997-04-30
CPC分类号： H04B1/7107 , H04B1/71072 , H04B1/7115 , H04B1/7117 , H04B1/712 , H04B2001/71077 , H04B2201/70701 , H04B2201/70709
摘要： A Code-Division Multiple Access (CDMA) receiver removes the pilot signal from the received signal. The pilot signal is defined by its multipath parameters (amplitudes, phase shift and delays) and its signature sequence. Since this information is known at the user's receiver terminal (i.e., handset), the pilot signals of the interfering multipath components of the baseband received signal are detected and removed prior to demodulation of the desired multipath component. The pilot signal may be cancelled prior to or following the data accumulation stage. The pilot signal cancellation can be switched on and off depending on the detected path signal level.
摘要翻译： 码分多址（CDMA）接收机从接收信号中去除导频信号。 导频信号由其多径参数（幅度，相移和延迟）及其签名序列定义。 由于该信息在用户的接收机终端（即，手机）处是已知的，所以在解调期望的多路径分量之前检测和去除基带接收信号的干扰多径分量的导频信号。 可以在数据累积阶段之前或之后取消导频信号。 导频信号消除可以根据检测到的路径信号电平进行接通和关断。
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公开(公告)号：US20080223131A1
公开(公告)日：2008-09-18
申请号：US11686507
申请日：2007-03-15
CPC分类号： G01S11/14 , A61B5/112 , A61B5/1122 , A61B5/1126 , A61B5/725 , A61B2562/0219 , G01C21/005 , G01C22/006 , G06F19/00
摘要： A system captures motion data in natural environments. A set of sources and a set of sensors are arranged on an object such as a human body. Each source emits ultrasonic signals detected by the sensors. A driver module is also arranged on the body. The driver module generates the ultrasonic signals for the set of sources and timing signals for the set of sensors. Distances between the set of sources and the set of sensors are measured based on a time of flight of the ultrasonic signals. Three dimensional locations of the set of sources and the set of sensors are determined from the distances. The distance measurements are refined using inertial components that provide rotation rates and accelerations. All these measurements together yield poses or configurations of the object.
摘要翻译： 系统在自然环境中捕获运动数据。 一组源和一组传感器被布置在诸如人体的物体上。 每个源发射由传感器检测到的超声波信号。 驾驶员模块也布置在车身上。 驱动器模块为该组传感器的一组源和定时信号产生超声波信号。 根据超声波信号的飞行时间来测量源组和传感器组之间的距离。 根据距离确定源组和传感器组的三维位置。 使用提供旋转速度和加速度的惯性部件来改进距离测量。 所有这些测量一起产生对象的姿势或配置。
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4.发明授权Apparatus for providing wireless transmission of information in electronic display systems and methods of using the same 失效用于在电子显示系统中提供信息的无线传输的装置及其使用方法公开(公告)号：US06791466B1
公开(公告)日：2004-09-14
申请号：US08534808
申请日：1995-09-25
IPC分类号： H04Q100
CPC分类号： H04J3/0605 , H04J3/0602 , H04L7/04
摘要： An apparatus for providing wireless transmission of information in electronic display systems and methods of using the same. In particular, the present invention is directed to an air interface and protocol to facilitate wireless transmission of information from a communication base station or other controlling device to individual electronic display modules.
摘要翻译： 一种用于在电子显示系统中提供信息的无线传输的装置及其使用方法。 具体地，本发明涉及一种空中接口和协议，以便于将信息从通信基站或其他控制设备无线传输到各个电子显示模块。
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公开(公告)号：US6021330A
公开(公告)日：2000-02-01
申请号：US898440
申请日：1997-07-22
申请人： Giovanni Vannucci
发明人： Giovanni Vannucci
CPC分类号： H04W64/00
摘要： Methods and apparatus for estimating mobile location in a wireless communication system including a plurality of base stations. In a base-to-mobile embodiment, the system base stations periodically transmit location signals to mobile stations during a system-wide blank-and-burst interval during which normal wireless communications are suspended. The interval is made sufficiently short that disruption to normal operation is negligible. Each base station transmits a distinct location signal which can be identified by a mobile station as associated with a particular base station. A given mobile station for which a location estimate is to be generated detects location signals from at least three of the system base stations. The detected location signals are used to generate differential path delay measurements which may be further processed in accordance with a triangulation technique to generate an estimate of mobile location. The suspension of normal wireless communications permits the location signals to occupy a broad bandwidth corresponding to multiple voice data channels, such that high resolution differential path delay measurements can be generated. The location signals from adjacent or neighboring base stations may also be configured to appear mutually orthogonal at a receiving mobile station, such that location signals from base stations close to a mobile will not interfere with detection of a location signal from a more distant base station. For example, the location signals may be selected to have waveforms which exhibit substantially non-overlapping comb-like frequency spectra. The invention may also be implemented in partial system blanking embodiments and mobile-to-base embodiments.
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公开(公告)号：US5649296A
公开(公告)日：1997-07-15
申请号：US492174
申请日：1995-06-19
IPC分类号： G08B13/24 , G01S13/75 , G01S13/76 , G01S13/79 , G06K7/00 , G06K17/00 , H04B1/59 , H04B7/26 , H04B1/40
CPC分类号： G06K7/0008
摘要： A duplex radio communication system includes an Interrogator which generates a first modulated signal by modulating a first information signal onto a radio carrier signal. The Interrogator transmits the first modulated signal to at least one remote Tag of the system. The remote Tag receives and processes the first modulated signal received at its Antenna. A Backscatter Modulator uses a second information signal to modulate the reflection of the first modulated signal from the Antenna, the reflected signal being a second modulated signal. The Interrogator receives and demodulates the second modulated signal to obtain the second information signal.
摘要翻译： 双工无线电通信系统包括一个询问器，该询问器通过将第一信息信号调制到无线电载波信号上来产生第一调制信号。 询问器将第一调制信号发送到系统的至少一个远程标签。 远程标签接收并处理在其天线处接收到的第一个调制信号。 反向散射调制器使用第二信息信号来调制来自天线的第一调制信号的反射，反射信号是第二调制信号。 询问器接收并解调第二调制信号以获得第二信息信号。
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公开(公告)号：US07349365B2
公开(公告)日：2008-03-25
申请号：US10277709
申请日：2002-10-22
申请人： Giovanni Vannucci
发明人： Giovanni Vannucci
摘要： A method and system communicates messages using a radio signal. The radio signal is transmitted according to an air interface standard for wireless radio communications. A baseband envelope of the transmitted radio signal is modulated while maintaining compliance with the air interface standard to encode a message in the radio signal. A receiver demodulates the baseband envelope to decode the message. The transmitter and receiver can be part of a cellular telephone network including mobile telephones and base stations.
摘要翻译： 方法和系统使用无线电信号来传送消息。 无线电信号根据用于无线电通信的空中接口标准传输。 传输的无线电信号的基带包络被调制，同时维持符合空中接口标准以对无线电信号中的消息进行编码。 接收机解调基带包络以对消息进行解码。 发射机和接收机可以是蜂窝电话网络的一部分，包括移动电话和基站。
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公开(公告)号：US07072587B2
公开(公告)日：2006-07-04
申请号：US10126761
申请日：2002-04-19
IPC分类号： H04B10/00
CPC分类号： H04M1/22 , G09G3/14 , G09G3/32 , G09G3/3406 , G09G2320/0626 , G09G2360/144 , H01H2219/038 , H04W52/027 , Y02D70/166
摘要： An optical communications transceiver includes an LED coupled in series with a resistor. A microprocessor has one I/O pin connected to the LED. In a first mode or transmit mode, the LED is periodically driving in forward bias to emit light to transmit data. In a second or receive mode, the LED is periodically not driven in reverse bias, e.g., reverse bias or zero bias. Then, the LED is allowed to change charge of the capacitance of the LED's junction using a photo-current. The change in charge is measured using a timer. When the change in charge exceeds a predetermined threshold, input light is sensed. Thus, the LED can be used to receive data in the second mode.
摘要翻译： 光通信收发器包括与电阻器串联耦合的LED。 微处理器有一个I / O引脚连接到LED。 在第一模式或发射模式中，LED以正向偏压周期性地驱动以发光以传输数据。 在第二或接收模式中，LED周期性地不以反向偏置驱动，例如反向偏置或零偏置。 然后，允许LED使用光电流来改变LED结的电容的电荷。 使用定时器测量电荷变化。 当电荷变化超过预定阈值时，感测输入光。 因此，LED可以用于在第二模式中接收数据。
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公开(公告)号：US06518918B1
公开(公告)日：2003-02-11
申请号：US09568957
申请日：2000-05-11
IPC分类号： H04B7185
CPC分类号： G01C5/06 , Y10T137/2012
摘要： Disclosed is a communication device and method for estimating a more accurate vertical position or altitude of a communication device using atmospheric pressure measurements. In one embodiment, a first communication device comprises a pressure sensor for measuring local atmospheric pressure at the first communication device and a transceiver for communicating with a second communication device, wherein the transceiver may be operable to receive barometric calibration information for calibrating a local atmospheric pressure measured at the first communication device and/or to transmit the measured local atmospheric pressure to the second communication device. The first communication device may further comprise a processor for estimating an altitude using the measured local atmospheric pressure and received barometric calibration information.
摘要翻译： 公开了一种用于使用大气压力测量来估计通信装置的更精确的垂直位置或高度的通信装置和方法。 在一个实施例中，第一通信设备包括用于测量第一通信设备处的局部大气压力的压力传感器和用于与第二通信设备通信的收发器，其中收发器可操作以接收用于校准局部大气压力的气压校准信息 在第一通信设备处测量和/或将测量的局部大气压力传送到第二通信设备。 第一通信设备还可以包括处理器，用于使用所测量的局部大气压力和接收到的气压校准信息来估计高度。
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公开(公告)号：US6130623A
公开(公告)日：2000-10-10
申请号：US777832
申请日：1996-12-31
CPC分类号： H04L9/3271 , H04B7/24 , G01S13/756 , H04L2209/56 , H04L2209/805
摘要： A tag and an interrogator exchange proprietary information using Modulated BackScatter (MBS) technology. A method for encrypting the RFID user's PIN and thereby making the interception and the subsequent illegal use of RFID accounts at least as difficult as a present day ATM cards. For example, the encryption method can be based upon the US Digital Encryption Standard (DES), either first or third level. The Tag's personal encryption key is only known by the financial database and the RFID Tag. This method can be applied to any type of financial, debt, identification, or credit card.
摘要翻译： 标签和询问器使用调制背散射（MBS）技术交换专有信息。 用于加密RFID用户的PIN，从而使截取和随后非法使用RFID帐户的方法至少与当前的ATM卡一样困难。 例如，加密方法可以基于美国数字加密标准（DES），即第一级或第三级。 标签的个人加密密钥仅由财务数据库和RFID标签所知。 这种方法可以应用于任何类型的金融，债务，身份证明或信用卡。
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