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    • 51. 发明申请
    • Method for Adjusting the Transmission Time of a Continuous Wave and Reader Thereof
    • 调整连续波及其阅读器传输时间的方法
    • US20110181398A1
    • 2011-07-28
    • US13003736
    • 2010-09-09
    • Hui LiYong YuanLiang Zhang
    • Hui LiYong YuanLiang Zhang
    • G06K7/01
    • G06K7/0008G06K7/10217G06K7/10297
    • A reader and method for adjusting the transmission time of a continuous wave (CW), wherein the method comprises setting an initial value for a response waiting time, sending the CW to a tag after sending a command to the tag and waiting for a response from the tag, judging whether the response from the tag is received within the response waiting time. If the response from the tag is received within the response waiting time, then sending of the CW is stopped and the response waiting time is adjusted. If the response from the tag is still not received beyond the response waiting time, then sending of the CW is stopped. The time for the reader to wait for a response from the tag is far less than 20 ms. Consequently, a command failure can be found early, so as to improve the processing efficiency of an RFID system.
    • 一种用于调整连续波(CW)的传输时间的读取器和方法,其中所述方法包括设置响应等待时间的初始值,在向标签发送命令并等待响应之后将CW发送到标签 标签,判断在响应等待时间内是否接收到来自标签的响应。 如果在响应等待时间内接收到来自标签的响应,则停止发送CW并且调整响应等待时间。 如果在响应等待时间之后仍然没有收到标签的响应,则CW的发送被停止。 读者等待标签响应的时间远远少于20 ms。 因此,可以及早发现命令故障,以提高RFID系统的处理效率。
    • 59. 发明授权
    • Predistortion apparatus, system, and method
    • 预失真装置,系统和方法
    • US07812669B2
    • 2010-10-12
    • US12485456
    • 2009-06-16
    • Hui LiZhan ShiJianmin Zhou
    • Hui LiZhan ShiJianmin Zhou
    • H03F1/26
    • H03F1/3247H03F2201/3233
    • The present invention discloses a predistortion apparatus, a predistortion system and a predistortion method. The predistorter comprises a modular value calculating section, for performing modular arithmetic on an information source input signal inputted from an information source; an orthogonal lookup table value acquiring section, for searching N stored lookup tables orthogonal to one another, finding out corresponding output of each lookup table in accordance with the modular value of the information source input signal, and acquiring N lookup table values, wherein N is an integer greater than 1; a multiplying section, for multiplying the N lookup table values acquired by the orthogonal lookup table value acquiring section with N amplitude adjustment factors to obtain N amplitude adjustment values, and multiplying the N lookup table values with N phase adjustment factors to obtain N phase adjustment values; and a summating section, for summating the N amplitude adjustment values to obtain an amplitude predistortion value, and summating the N phase adjustment values to obtain a phase predistortion value.
    • 本发明公开了一种预失真装置,预失真系统和预失真方法。 预失真器包括模块值计算部分,用于对从信息源输入的信息源输入信号进行模数运算; 正交查找表值获取部分,用于搜索彼此正交的N个存储的查找表,根据信息源输入信号的模块值找出每个查找表的相应输出,并获取N个查找表值,其中N是 大于1的整数; 乘法部分,用于将由正交查找表值获取部分获取的N个查找表值与N个幅度调整因子相乘以获得N个幅度调整值,并将N个查找表值与N个相位调整因子相乘以获得N个相位调整值 ; 以及求和部分,用于对N个振幅调整值进行求和以获得幅度预失真值,并且对N个相位调整值进行求和以获得相位预失真值。