 Rates
½, 1/3. Other rates can be supplied by external puncturing.
Generator
polynomials:
G0=557(octal), G1=663(octal),
G2=711(octal) (rate 1/3).
G0=561(octal), G1=753(octal)
(rate ½).
Encoder interface and timing
The encoder encodes 1 bit per clock.
Encoder rate can be changed for each packet. The rate signal must
be constant at packet encoding time.
The following diagram shows the expected timing:
Pin out:
Encoder packet processing
The encoder works at packet mode with unlimited packet length.
The encoder must end a packet with 8 zeros to set the shift register
to zero at the end of packet transmission.
Free download
our Viterbi K=9 encoder.
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