: . . , , , , , . , .
, . :
.
-
.
.1.
.2. :
; ;
-
-:
U (t) = (Um+ Um sinΩt) * sinwt;
:
U (t) = Um sinwt +m Um/2cos(w+Ω)t - m Um/2cos(w-Ω)t, m , m = Um/≥ Um.
, - 2 , - . (w+Ω) , (w-Ω) . - m =0, : Um≤ Um. , .. , -. m = 0,5.
- ,
, , 66,6%, 33,3%. , ().
.
. . -:
U (t) = Um(coswt +MsinΩt +φ0), M , φ0 - . = ∆ω ⁄Ω, ∆ω - ,
. < 1 - , > 3 - .
.
.
-:
U (t) = Um(coswt +∆φ sinΩt +φ0), ∆φ .
|
|
, , . , . . , . , : , , . . , .. .
.
: - , .. , , , .
:
1. ?
2. -?
3. ?
4. ?
5. - ?
:
1. , :
U (t) = 3cos628t,
U(t) = 10cos6,28*10 4 t,
2. - [1, . 43-58].
3. - .
:
1. = 4
.. | .. | .. |
Modulation | ||
қ | Peak | |
Ƴ | Frequency | |
қ | Phase | |
Pulse | ||
ң | ||
- | -қ | Pulse code |