RMS thermal noise =

Available thermal noise power = kTB

Noise factor (T = 290K)

Noise figure = 10log(F)

Friis's formula

Equivalent input noise temperature T
_{
e
}
= (F - 1)T
_{
o
}

Quantization noise power = (lsb)
^{
2
}
/12

**
Ideal N bit A/D
**

for a full scale sine wave signal

**
Practical A/D
**

SNR = -10log((2
pt
F)
^{
2
}
+ ((1+e)/2
^{
N
}
)
^{
2
}
+ (n/2
^{
N
}
)
^{
2
}
)

t
= rms aperture uncertainty

F = IF frequency

e = average DNL of converter in lsb

n = rms noise level of the converter in lsb

Received power

Power gain G = 4
p
A
_{
eff
}
/
l
^{
2
}

Radar range equation:

s
is the target RCS,
t
is the pulse width, L represents system losses, T
_{
S
}
is the system noise temperature

Last updated 16 July, 2000

© 2000 Michael Wells