20.01.2015 Views

t - 厦门大学通信工程系

t - 厦门大学通信工程系

t - 厦门大学通信工程系

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

变 参 信 道 特 性 对 信 号 传 输 的 影 响<br />

• 发 射 单 频 信 号 Acosω 0 t 后<br />

接 收 信 号<br />

n<br />

∑<br />

R() t = u ()cos t ω [ t− τ ()] t ( i=<br />

1,2,... m)<br />

∑<br />

i=<br />

1<br />

n<br />

i = 1<br />

i o i<br />

= u ( t ) c o s [ ω t + ϕ ( t ) ]<br />

∑<br />

i o i<br />

= u ()cos t ϕ ()cos t ω t−u ()sin t ϕ ()sin t ω t<br />

i i o i i o<br />

= X ()cos t ω t−X ()cos t ω t<br />

c o s o<br />

= Vt ()cos[ ω t+<br />

ϕ()]<br />

t<br />

o

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!