求单边余弦函数的傅里叶变换
最近在学习信号与系统课程,输入信号为x(t)=cos(ω0t)u(t)x\left( t \right) = \cos \left( {
{\omega _0}t} \right)u\left( t \right)x(t)=cos(ω0t)u(t)需要求其傅里叶变换
已知余弦函数的傅里叶变换为F[cosω0t]=π[δ(ω−ω0)+δ(ω+ω0)]F\left[ {\cos {\omega _0}t} \right] = \pi \left[ {\delta \left( {\omega - {\omega _0}} \right) + \delta \left( {\omega + {\omega _0}} \right)} \right]F[cosω0t]=π[δ(ω−