专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2005020600A2 MEASURING DISTANCE USING WIRELESS COMMUNICATION 审中-公开
标题翻译：使用无线通信测量距离
公开(公告)号：WO2005020600A2
公开(公告)日：2005-03-03
申请号：PCT/EP2004/051289
申请日：2004-06-29
申请人： MOTOROLA INC , MOTOROLA LIMITED , LUZZATTO, Ariel , SERFATY, Salomon
发明人： LUZZATTO, Ariel , SERFATY, Salomon
IPC分类号： H04Q7/00
CPC分类号： H04L27/2601 , G01S1/026 , G01S5/14 , G01S11/02 , G01S11/06
摘要： A method of estimating the distance between a first wireless communication terminal and a second wireless communication terminal includes: (i) receiving at the first terminal a received signal comprising a composite multipath derivative of a RF transmission signal transmitted by a second terminal which transmission signal comprises an OFDM signal; and (ii) processing the received signal including performing a demodulation operation to produce a demodulated signal; and characterised by: (iii) resolving the demodulated signal into a plurality of components corresponding to different path length components included in the received signal; (iv) identifying which of the resolved components corresponds to a shortest path length; and (v) for the identified component, computing a time of travel from the second terminal to the first terminal. the first terminal may be operable to determine a strength value for each of the resolved components. The strength value may be compared with a threshold value to determine if the strength value is to be considered as non-zero, whereby the component having that strength value is to be included to find the component having the shortest path length. Also described is a terminal which operates to carry out these steps and a method of transmitting and receiving an OFDM signal which includes these steps. The transmitted signal which is transmitted by the second terminal and received in a multipath derivative form by the first terminal may conveniently be the PLCP (Physical Layer Convergence Procedure) Training Signal defined in the 802.11 standard. This is the 'Long Training Sequence' normally provided at the beginning of a transmission by a terminal in a LAN (e.g. a RU). The purpose of this signal is to allow another terminal (e.g. an AP) to synchronize with the terminal.
摘要翻译：估计第一无线通信终端与第二无线通信终端之间的距离的方法包括：（i）在第一终端处接收包括由第二终端发送的RF传输信号的复合多路径导数的接收信号，该传输信号包括 OFDM信号; 以及（ii）处理所述接收信号，包括执行解调操作以产生解调信号; 并且其特征在于：（iii）将解调信号分解成对应于包括在接收信号中的不同路径长度分量的多个分量; （iv）识别哪个解析的组件对应于最短路径长度; 和（v）对于所识别的组件，计算从第二终端到第一终端的行进时间。第一终端可以可操作以确定每个解析的组件的强度值。强度值可以与阈值进行比较，以确定强度值是否被认为是非零，由此将包括具有该强度值的分量以找到具有最短路径长度的分量。还描述了操作以执行这些步骤的终端和包括这些步骤的发送和接收OFDM信号的方法。由第二终端发送并由第一终端以多路径导数形式接收的发送信号可以方便地是在802.11标准中定义的PLCP（物理层收敛过程）训练信号。这是通常在LAN（例如RU）中的终端的传输开始时提供的“长训练序列”。该信号的目的是允许另一终端（例如AP）与终端同步。

2. 发明申请

WO2005015761A1 ANTENNA SWITCH CIRCUIT 审中-公开
标题翻译：天线开关电路
公开(公告)号：WO2005015761A1
公开(公告)日：2005-02-17
申请号：PCT/EP2004/051277
申请日：2004-06-28
申请人： MOTOROLA INC , MOTOROLA LIMITED , FRIEDLANDER, Haim , LUZZATTO, Ariel , SCHWARTZMAN, Zalman , SHIRAZI, Gadi
发明人： FRIEDLANDER, Haim , LUZZATTO, Ariel , SCHWARTZMAN, Zalman , SHIRAZI, Gadi
IPC分类号： H04B1/48
CPC分类号： H04B1/40 , H04B1/48
摘要： An antenna switch circuit for use in a RF transceiver, the antenna switch circuit comprising: (xix) a transmitter terminal for receiving an input RF signal from a transmitter; (xx) a receiver terminal for providing an output RF signal to a receiver; (xxi) an antenna terminal for providing an output RF signal to an antenna and for receiving an input RF signal from an antenna; (xxii) a transmission transfer path for transferring a RF signal from the transmitter terminal to the antenna terminal when the switch circuit is in a transmit mode; (xxiii) a reception transfer path for transferring a RF signal from the antenna terminal to the receiver terminal when the switch circuit is in a receive mode; (xxiv) in a first of said transfer paths a first electrically controlled device having a conducting state and a blocking state, the electrically controlled device in its blocking state in a first mode of the switch circuit isolating a second of the transfer paths; (xxv) in the second of the transfer paths an isolator which isolates the first transfer path in a second mode of the switch circuit; and (xxvi) a second electrically controlled device having a conducting state and a blocking state and operable in its conducting state to connect one of the transfer paths to ground; and characterised in that the antenna switch circuit further includes: (xxvii) at least one further electrically controlled device having a conducting state and a blocking state; wherein the electrically controlled devices are arranged in the circuit to protect the transmitter terminal from discharge of both positive and negative electrostatic charge. Also described are a RF transceiver incorporating the antenna switch circuit and a method of protecting a RF transmitter from electro-static discharge using the antenna switch circuit.
摘要翻译：一种用于RF收发器的天线切换电路，所述天线切换电路包括：（xix）发射机终端，用于从发射机接收输入的RF信号; （xx）用于向接收机提供输出RF信号的接收机终端; （xxi）天线端子，用于向天线提供输出RF信号并用于从天线接收输入RF信号; （xxii）当所述开关电路处于发送模式时，用于将RF信号从所述发射机终端传送到所述天线端子的传输传输路径; （xxiii）用于当开关电路处于接收模式时将RF信号从天线端子传送到接收器端子的接收传送路径; （xxiv）在所述传输路径中的第一个中具有导通状态和阻塞状态的第一电控装置，所述电控装置处于处于隔离状态的开关电路的第一模式，隔离第二传输路径; （xxv）在所述传输路径的第二传输路径中隔离所述第一传输路径在所述开关电路的第二模式中; 和（xxvi）具有导通状态和阻塞状态并可在其导通状态下操作以将所述传输路径中的一个连接到地的第二电控装置; 并且其特征在于，所述天线开关电路还包括：（xxvii）至少一个具有导通状态和阻断状态的电控装置; 其中所述电控装置被布置在所述电路中以保护所述发射器端子免于正和负静电电荷的放电。还描述了包含天线开关电路的RF收发器和使用天线开关电路来保护RF发射器免受静电放电的方法。

3. 发明申请

WO2007008313A1 RF TRANSMITTER AND METHOD OF OPERATION 审中-公开
标题翻译：射频发射机及其操作方法
公开(公告)号：WO2007008313A1
公开(公告)日：2007-01-18
申请号：PCT/US2006/021969
申请日：2006-06-06
申请人： MOTOROLA, INC. , SHIRAZI, Gadi , FRIEDLANDER, Haim , LUZZATTO, Ariel , SERAFY, Salomon
发明人： SHIRAZI, Gadi , FRIEDLANDER, Haim , LUZZATTO, Ariel , SERAFY, Salomon
IPC分类号： H04K1/10 , H04L27/00
CPC分类号： H04L27/2614
摘要： An RF transmitter (200) including means (201) for generating a multi-carrier modulation signal comprising a plurality of sub-carriers, means (309) for modulating an RF carrier signal (c(t)) with the sub-carriers of the multi-carrier modulation signal to produce a modulated signal, a signal splitter (305) to split a signal including the sub-carriers of the multi-carrier modulation signal into a plurality of sub-signals each including a sub-set of the plurality of sub-carriers, a plurality of power amplifiers (203) each operable to amplify a separate one of the sub-signals to produce an amplified sub-signal and an RF power combiner (205) operable to combine the amplified sub-signals for transmission as a combined amplified RF signal. Also described is a method of operation of the transmitter.
摘要翻译：一种RF发射机（200），包括用于产生包括多个子载波的多载波调制信号的装置（201），用于调制RF载波信号（c（t））的装置（309）多载波调制信号以产生调制信号，将包括多载波调制信号的子载波的信号分离成多个子信号的信号分离器（305），每个子信号包括多个子载波，多个功率放大器（203），每个功率放大器（203）可操作以放大单独的一个子信号以产生放大的子信号;以及RF功率组合器（205），其可操作以将放大的子信号组合以用于传输，组合的放大RF信号。还描述了发射机的操作方法。

4. 发明申请

WO2005107076A1 CIRCUITS FOR USE IN RADIO COMMUNICATIONS 审中-公开
标题翻译：无线电通信使用电路
公开(公告)号：WO2005107076A1
公开(公告)日：2005-11-10
申请号：PCT/US2005/013207
申请日：2005-04-19
申请人： MOTOROLA, INC. , LUZZATTO, Ariel , FRIEDLANDER, Haim , SHIRAZI, Gadi
发明人： LUZZATTO, Ariel , FRIEDLANDER, Haim , SHIRAZI, Gadi
IPC分类号： H03L7/087
CPC分类号： H03L7/185 , H03L2207/12
摘要： A frequency synthesiser circuit for use in wireless communications including a phase locked loop including a VCO (voltage controlled oscillator), wherein the synthesiser circuit includes a further oscillator which in operation is a free running oscillator at a frequency higher than the VCO and a mixer connected to receive input signals from the VCO and from the further oscillator and to combine such signals. Also described is a wireless communications transmitter or receiver incorporating the frequency synthesiser circuit.
摘要翻译：一种用于包括VCO（压控振荡器）的锁相环的无线通信的频率合成器电路，其中所述合成器电路包括另外的振荡器，所述振荡器在高于VCO的频率下是自由振荡器，并且混频器连接以从VCO和另外的振荡器接收输入信号并组合这样的信号。还描述了包含频率合成器电路的无线通信发射机或接收机。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式