码分射频识别系统相关解扩的实现

Implementation of Correlation De-Spread Spectrum for CD-RFID System

码分射频识别系统(CD-RFID)是将CDMA技术和RFID相结合的新技术,主要介绍了该系统中如何对扩展频谱进行解扩。通过对采用并行加法器计算相关值的方法进行详细阐述,并根据RFID系统远近场标签信号强度不同的特点,设计了通过阈值和相关峰值这2个条件进行判决的方法。

CDMA RFlD （CD-RFID） system is a new technique, which combines CDMA with RFID techniques. The de-spread process of spread spectrum system is introduced in this paper. Parallel adder to calculate correlation value is adopted and expounded, According to the different label signal strength in the near to far field of RFID system, threshold and correlation peak are designed as two decision conditions.