ComBlock COM-1826 Manual - Page 2
Browse online or download pdf Manual for Modem ComBlock COM-1826. ComBlock COM-1826 19 pages. Tdrss spread-spectrum modem
Block Diagram
DSSS
demodulator
baseband
Digital
complex
frequency
samples
translation
PSK
demodulator
to PSK
I&D
demodulator
Symbol
timing
NCO
Re-sampling
LPF
Carrier
NCO
Carrier
tracking
loop (PLL+AFC)
PSK symbol
decoding
Symbol
timing
loop
3-channel receiver
Code
timing
NCO
Skip
State
1/2 chips
machine
Code
Code
replica
acquisition
generation
Despreading
Coherent I&D
x NACQ
Non-coherent I&D
parallel
detection
circuits
Despreading
with on-time
to PSK
code replica
demodulator
Frequency error
Code lock
Carrier lock
Noise power
Demodulated
data bits
False
Code
code lock
tracking
detection
loop
early
center
3
late
bins
Monitoring
Monitoring
Info