摘要：
Wiener Khinchin Theorem 阅读全文
摘要：
见标题 阅读全文
摘要：
Finddelay Cross covariance $$ \gamma _{XY}(\tau )=\operatorname {E} \left[\left(X_{t} \mu _{X}\right)\left(Y_{t+\tau } \mu _{Y}\right)\right], $$ Cros 阅读全文
摘要：
系统模型 假设$\{a_n\}$为发射滤波器的输入符号序列，例如，在二进制情况下，$\{a_n\}$的取值为0,1或者+1, 1。基带信号则为 $$d(t) = \sum_{n= \infty}^{\infty} a_n \delta (t nT_s).$$ 发送滤波器产生的输出信号为 $$s(t) 阅读全文
摘要：
The study of digital communications starts with the following fundamental problem. Given a set of messages $\{s(t), 0 \leq t \leq T \}_{i=1}^{M −1}$ , 阅读全文
摘要：
Let $X_1$, $\ldots$, $X_n$ be independent and identically distributed as $N(\mu, \sigma^2)$, i.e. this is a sample of size $n$ from a normally distrib 阅读全文
摘要：
The sample mean is given by \begin{align} \overline{x}=\frac{1}{n}\sum_{i=1}^n x_i. \end{align} The biased sample variance is then written: \begin{ali 阅读全文