并且规定它的运算与复指数运算相同。
若正交函数为复指数集，其系数正好是傅里叶系数。
The coefficients are Fourier coefficients to the moment when the orthogonal functions are complex exponential functions.
本文给出了复指数信号模型非线性最小二乘解的几何结构。
The geometric structure of nonlinear least squares solution for signals by complex exponents is offered in this paper.
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