Communication Systems Engineering Episode 3 Part 4 pdf
Communication Systems Engineering Episode 3 Part 4 pdf
... occur?
C) Find the generator matrix for the (7 ,3) block code based on the above generator. (note
that a (7 ,3) code has 3 information bits and 4 check bits).
D) Using the generator matrix from ... MASSACHUSETTS INSTITUTE OF TECHNOLOGY
Department of Aeronautics and Astronautics
16 .36 : Comm. Sys. Engineering Date Issued: April 17
Problem Set No. 8 Date Due: April ... code?
Probl...
Communication Systems Engineering Episode 1 Part 4 docx
... can be used to represent 4
∆
quantization levels
– Soon we will learn that you only need H(Q) bits
∆
− ∆
R
1
R
2
R
3
R
4
q
1
= -3 /2
q
4
= 3 /2
q
2
=∆/2
q
3
=∆/2
Eytan Modiano
Slide ...
A
2
A
2
[] =
2 A
∫
− A
xdx =
3
A
2
/
3
A
2
/
3
SQNR =
∆
2
/
12
=
(
2
AN)
2
/
12
= N
2
,(∆ =
2
A / N)
/
Eytan Modiano
Slide 5
Lecture 4: Quantization
Eyt...
Communication Systems Engineering Episode 1 Part 8 pdf
... 3dB = 7dB
– => Pb = 5x10
-4
from table 7.55 or 7.58
• Regenerator: P
b
(up) = P
b
(down) = 3x10
-6
– (from table with (E
b
/N
0
)
d
= 10dB)
– Hence P
b
(up/down) ~ 2 P
b
(up) ~ 6x3x10
-6 ...
– Hence a doubling of the diameter D increases gain by a factor of 4
Eytan Modiano
Slide 4
Repeaters
Tx
P
T2
+ A
P
T3
+ A
+ Rx
P
N
P
N
P
N
• A repeater simply amplifies the sig...
Communication Systems Engineering Episode 2 Part 4 pps
... mixed voice and data
Slot 1 2 3 4 5 6
frame 1
frame 2
frame 3
frame 4
frame 5
15 3 20 2
15 7 3 9
7 9
7 9
18 7 3 15 9 6
18
idle
idle
idle
idle
2
3
3 6
Eytan Modiano
Slide 17 ... D
Tp
/ (D
Tp
+
τ
+ 2
τ
(e-1))
• Let
β
=
τ
/ D
Tp
=> Efficiency
≈
1/(1 +4. 4
β
) =
λ
< 1/(1 +4. 4
β
)
Eytan Modiano
Slide 7
Token ring issues
• Fairness: Can a...
Communication Systems Engineering Episode 1 Part 3 docx
...
t
F[(t)]
δ
F[(t)] =
∫
−∞
δ
(t)e
− jft
dt = e
0
= 1
δ
()
t
δ
() ⇔ 1
0
Eytan Modiano
Slide 4
1
Lecture 3: The Sampling Theorem
Eytan Modiano
AA Dept.
Eytan Modiano
Slide 1
The Fourier Transform ... f )e
jft
df
• Notation:
X(f) = F[x(t)]
X(t) = F-1 [X(f)]
x(t) � X(f)
Eytan Modiano
Slide 3
Notes about Sampling Theorem
• When sampling at rate 2W the reconstruction filt...
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