论文部分内容阅读
本文研究因数据字长有限而引起的两维FFT运算误差问题,通过理论分析和直接的模拟计算,得出了对“非相关”及“相关”两种两维数组进行两维FFT运算的误差估计公式。此外,还研究了在输入数据和FFT中间运算数据的字长不相等的情况下,FFT运算的误差问题。本文给出了各种不等字长情况下的计算结果,为有关硬设备的设计提供了依据。
In this paper, we study the two-dimensional FFT operation error caused by limited data word length. Through theoretical analysis and direct simulation calculation, we get the error of two-dimensional FFT operation for two non-related and related two-dimensional arrays Estimation formula. In addition, the problem of the error of FFT operation is studied under the condition that the word length of the input data and FFT intermediate operation data is not equal. In this paper, we give the calculation results under different word length, which provides the basis for the design of the hardware equipment.