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

US20100127831A1 ACTIVE RFID APPARATUS FOR IMPROVING PN CODE GNENRATION 有权
标题翻译：有效的RFID设备，用于改进PN代码
公开(公告)号：US20100127831A1
公开(公告)日：2010-05-27
申请号：US12562105
申请日：2009-09-17
申请人： Jong-sub CHA , Seung-il MYONG , Heyung-sub LEE , Sang-hyun MO , Jong-suk CHAE
发明人： Jong-sub CHA , Seung-il MYONG , Heyung-sub LEE , Sang-hyun MO , Jong-suk CHAE
IPC分类号： H04B1/707 , H04Q5/22
CPC分类号： H04J13/10 , H04B1/707 , H04J13/0022
摘要： An active radio frequency identification (RFID) apparatus having an additional transmitter in addition to a single transmitter is provided. The active RFID apparatus includes a first transmitter including a first pseudo noise (PN) code generator to generate a direct sequence spread spectrum (DSSS) introduced by ISO/IEC (International Organization for Standardization/International Electrotechnical Commission) 24730-2 or ISO/IEC 18185-5 type B; and a second transmitter including a second PN code generator to perform an AND operation on an initial value and a fed back value and shift the resultant value of the AND operation, to perform an XOR operation on particular bits from among the shifted bits and to perform an XOR operation again on the shifted bits and the resulting value of the XOR operation to finally generate a PN code. Accordingly, where an additional PN code is added besides an existing PN code, a PN code having excellent auto correlation characteristics allowing discrimination of the PN code itself and cross-correlation characteristics providing a code discrimination ability with respect to another code can be generated.
摘要翻译：提供了除了单个发射机之外还具有附加发射机的有源射频识别（RFID）装置。有源RFID装置包括第一发射机，其包括第一伪噪声（PN）码发生器，以产生由ISO / IEC（国际标准化组织/国际电工委员会）24730-2或ISO / IEC引入的直接序列扩频（DSSS） 18185-5型B; 以及第二发送器，包括第二PN码发生器，用于对初始值和反馈值执行AND运算，并且移位AND运算的结果值，以对从移位中的特定比特执行异或运算，并执行对移位的位再次进行XOR操作，并且产生XOR运算的结果值，以最终生成PN码。因此，除了现有的PN码之外附加附加的PN码，可以产生具有能够区分PN码本身的优良自相关特性的PN码和提供相对于其他码的码识别能力的互相关特性。

2. 发明申请

US20100158165A1 PARALLEL AUTOMATIC FREQUENCY OFFSET ESTIMATION METHOD AND APPARATUS 有权
标题翻译：并行自动频率偏移估计方法和装置
公开(公告)号：US20100158165A1
公开(公告)日：2010-06-24
申请号：US12579840
申请日：2009-10-15
申请人： Seung-il MYONG , Jong-sub CHA , Hoe-sung YANG , Kang-bok LEE , Heyung-sub LEE , Jong-suk CHAE
发明人： Seung-il MYONG , Jong-sub CHA , Hoe-sung YANG , Kang-bok LEE , Heyung-sub LEE , Jong-suk CHAE
IPC分类号： H04L7/00 , H04L27/06
CPC分类号： H04L27/0014 , H04L2027/0026 , H04L2027/0046
摘要： Disclosed is a wireless signal receiving apparatus, and more particularly, disclosed is a parallel automatic frequency offset estimation apparatus and method for tracking a frequency offset in an early stage by calculating, in parallel, frequency offsets of a received signal. The parallel automatic frequency offset estimation apparatus includes a receiving unit to receive a data frame; and a frequency offset estimation unit to calculate, in parallel, frequency and phase deviations at different bit intervals within a particular section of the received data frame, to add together the frequency and phase deviations to obtain a first sum of the frequency and phase deviations, and to add the first sum to a frequency phase deviation calculated for each bit after the particular section in the received data frame to obtain a second sum of the frequency and phase deviations. Accordingly, transmission frequency tracking can be performed at higher speed, compared to the conventional systems in which frequency offset acquisition is carried out in stages. Also, accurate tracking of a transmission frequency is possible in an initial frame.
摘要翻译：公开了一种无线信号接收装置，更具体地，公开了一种并行自动频率偏移估计装置和方法，用于通过并行计算接收信号的频率偏移来跟踪早期的频率偏移。并行自动频率偏移估计装置包括：接收单元，用于接收数据帧; 以及频率偏移估计单元，用于并行地计算在接收数据帧的特定部分内的不同比特间隔处的频率和相位偏差，以将频率和相位偏差相加以获得频率和相位偏差的第一和，并且将第一和加到针对接收数据帧中的特定部分之后的每个比特计算的频率相位偏移，以获得频率和相位偏差的第二和。因此，与分阶段进行频率偏移获取的常规系统相比，可以以更高的速度执行传输频率跟踪。此外，在初始帧中可以准确地跟踪传输频率。

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