MIT中的一种基于全相位的IQ正交相位解调算法  

All Phase IQ Orthogonal Algorithm in MIT

作　　者：任德柱 邵高平[1] 程娟[1] 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2014年第4期447-452,共6页Journal of Information Engineering University

基　　金：国家自然科学基金资助项目(61271101)

摘　　要：针对MIT系统相位解调过程中信号非整周期采样以及奇异点对相位测量精度的影响,提出一种基于全相位的IQ正交算法,该算法通过对测得的数据进行全相位处理,再进行正交变换,从而有效提高了信号解调精度。通过实验表明,相对传统IQ正交算法,该算法能够降低信号非整周期采样以及奇异点对相位测量精度的影响,且计算复杂度低,运算速度快,能对相位差进行更为实时精确的测量。Aiming at the phase measurement accuracy limited by the signal non-whole cycle sam- piing and the singular point in phase demodulation algorithm of MIT system, this paper proposes an all phase IQ orthogonal algorithm, which deals with the measured data with all phase processing in front of orthogonal transformation to improve signal phase measurement accuracy. Experiments show that the algorithm can reduce the impact of the signal non-whole cycle sampling and singular point on the phase measurement accuracy, and its computation complexity is lower, operation is faster than the traditional IQ orthogonal algorithm, which can be more real-time and accurate for phase measurements.

关 键 词：磁感应断层成像 相位测量 全相位 IQ正交算法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]