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发明授权
CN101620663B 一种在无源射频识别系统中的数据编码方法 有权 转让

一种在无源射频识别系统中的数据编码方法
摘要：
一种数据传输方法，对待发送的二进制数据采用如下编码原则进行编码后调制并传输：对二进制数据x1采用中间相位不跳变的方式编码；对二进制数据x2采用中间相位跳变的方式编码；并且采用中间相位不跳变的高电平连续对两个二进制数据x1编码后，对于紧随其后的二进制数据x1采用中间相位不跳变的低电平编码；并且对采用中间相位不跳变的低电平编码的二进制数据x1之后的二进制数据x1采用中间相位不跳变的高电平编码；对紧随二进制数据x2之后的二进制数据x1，采用中间相位不跳变的高电平编码。在RFID系统的阅读器到标签的链路中使用本发明的编码方法，在信号占用带宽不变的前提下，能够给标签提供更多的能量。
摘要（英）：

The invention discloses a data transmitting method. Binary data to be sent is coded by the following coding principle and is then modulated and transmitted: binary data x1 is coded in the mode of non-jump of a middle phase; binary data x2 is coded in the mode of non-jump of the middle phase; after a high electrical level with non-jump of the middle phase is used for coding two binary data x1, closely following binary data x1 adopts a low electrical level with non-jump of middle the phase to code; the binary data x1 which adopts the low electrical level with non-jump of the middle phase to code adopts the high electrical level with non-jump of the middle phase to code; the binary data x1 closely following the binary data x2 adopts the high electrical level with non-jump of the middle phaseto code. If the coding method of the invention is used in a link form a reader to a tag in the RFID system, more energy can be provided for the tag under the condition of not changing band width occupied by signal.

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