MSK (Minimum Shift Keying) CML Microcircuits, MSK (Minimum Shift Keying) Datasheet - Page 16

• Manufacturer Part Number: MSK (Minimum Shift Keying)
• Description: Minimum Shift Keying and its Application to Wireless Data Transmission
• Manufacturer: CML Microcircuits

MSK and its Application to Wireless Data Transmission
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I/O
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Pseudo Code
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3.2.1.3 Monostable
The monostable monitors the pulsed output signal from the zero crossing detector. When a pulse is detected the output
of the monostable is set high and the timer is restarted. The value of the timer is set to 1/3 a symbol time for 1200 baud
and 1/2 symbol for 2400 baud. When the time-out period of the monostable expires the output is set low. If a new pulse
is detected on the input before the timer has expired, the timer is restarted and the output remains high. Figure 18 shows
the function of the monostable.
© 1997 MX COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
input[i] = current input sample
output[i] = current output sample
if sign(input[i]) != sign(input[i-1])
else
output[i] = 1;
output[i] = 0;
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Pseudo-Code Listing 2
output
Figure 17:Plot of Zero Crossing Function.
input
Figure 18: Plot of Monostable Function.
output
input
-1
1
0
1
0
1
0
1
0
t1
t1
t1+Tms
16
t2
t2
Time
Time
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Zero Crossing Detector
t3
t2+Tms
t3
t3+Tms
Fax: [phone]
Doc. # 20830084.001
APPLICATION