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FCC PART 15, SUBPART C, SEC. 15.247 - DIRECT SEQUENCE SPREAD SPECTRUM TRANSMITTERS
PCMCIA Wireless LAN Card, Model WL-211F
This integral cannot be solved in closed form, and numerical integration must be used. There are
error rate extensions for differential decoding and descrambling that are also to be accounted for.
This is done in a MATHCAD environment and is displayed in graphical format below.
1000 BYTE PER VS. ES/NO
11 Mbps CCK in Thermal Noise
0
10
-1
10
-2
10
15.5
16
Es/No (dB)
The reference PER is specified as 8% . The corresponding Es/No (signal to noise ratio per symbol) is
16.4 dB. The Es/No required to achieve the desired BER with maximum system implementation
losses is 18.4 dB. The minimum processing gain is again, 10 dB, therefore:
E
=
+
s
G
p
N
o
output
J
=
+
G
18
4 .
dB
p
S
The minimum jammer to signal ratio is as follows:
J
≥
−
8
4 .
dB
S
ULTRATECH GROUP OF LABS
3000 Bristol Circle, Oakville, Ontario, Canada L6H 6G4
Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vhk.ultratech@sympatico.ca, Website: http://www.ultratech-labs.com
•
Assessed by ITI (UK) Competent Body, NVLAP (USA) Accreditation Body & ACA/AUSTEL (Australia)
•
Accredited by Industry Canada (Canada) under ACC-LAB (Europe/Canada MRA)
•
Recognized/Listed by FCC (USA )
•
All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)
16.5
17
J
+
=
L
16
4 .
dB
system
S
≥
10
dB
J
+
+
≥
2
0 .
dB
10
S
FCC ID: MXF-WL211F
dB
File #: GTT-013FTX
Page 32
March 17, 2000
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