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Convergence in synchronous measurements

机译:同步测量中的收敛

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Synchronous detection using phase-quadrature reference signals is widely employed as a demodulation technique in communication systems. It also finds application in sensitive measurement systems, where the goal is to estimate the gain of an unknown system which is excited by a sinusoidal or square waveform. In measurement systems, longer integration times are the necessary tradeoff for accuracy in very poor signal-to-noise environments. As a result, is difficult to determine when the measurement has stabilized. This paper proposes a novel convergence estimator which yields an asymptotic estimate of relative error. This paper motivates the need for a convergence test and presents an algorithm to address the problem. Simulation results are used to verify the underlying concepts, and experimental results using real measurements are given to show the applicability of the technique.
机译:使用相位正交参考信号的同步检测被广泛用作通信系统中的解调技术。它还可用于敏感的测量系统,其目的是估计由正弦或方波激发的未知系统的增益。在测量系统中,较长的积分时间是在非常差的信噪比环境中获得精度所必需的权衡。结果,难以确定测量何时稳定。本文提出了一种新颖的收敛估计器,它可以产生相对误差的渐近估计。本文激发了对收敛性测试的需求,并提出了一种解决该问题的算法。仿真结果用于验证基本概念,并使用实际测量结果给出实验结果以表明该技术的适用性。

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