基于虚拟仪器的CDMA2000频率误差测量  

CDMA2000 frequency error measurement based on virtual instrument

作　　者：周巧玲[1] 吕锋[1] 

机构地区：[1]武汉理工大学信息工程学院,武汉430070

出　　处：《电子测量技术》2010年第1期71-73,共3页Electronic Measurement Technology

摘　　要：给出了一种基于虚拟仪器的精确测量CDMA2000信号频率误差的方法。该方法用FFT来对信号频谱进行粗略的估计,获取需要细化分析的窄带频谱范围,再在该窄带范围内利用线性调频Z变换(CZT)进行频率细化分析,在限制运算量的情况下实现较高的频率分辨率。实验证明,该方法能够有效地精确测量信号的频率误差。A method of measuring CDMA2000 signal frequency error based on virtual instrument was proposed, which estimated the spectrum of signal approximately by FFT to gain narrow-band spectral range , then conducted detailed analysis of frequency by chirp Z transform（CZT） within the scope of narrow-band. CZT could achieve higher frequency accuracy with restricted computation. Experiments show that the method can effectively and accurately measure signal＇s frequency error.

关 键 词：频率误差CDMA2000线性调频Z变换 LABVIEW 

分 类 号：TN925[电子电信—通信与信息系统]