Active RFID apparatus for improving PN code generation
    1.
    发明授权
    Active RFID apparatus for improving PN code generation 有权
    有源RFID设备,用于改善PN码生成

    公开(公告)号:US08401053B2

    公开(公告)日:2013-03-19

    申请号:US12562105

    申请日:2009-09-17

    IPC分类号: H04B1/00

    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。