[Tetra] code for the tetra MAC layer

Holger Hans Peter Freyther holger at freyther.de
Wed Jan 5 00:59:47 UTC 2011


> What's missing:
> * CRC16-CCITT to be computed over odd number of bits like 60 or 124
>   (all common implementations assume you encode integral # of bytes) [zecke]

Besides feeling stupid. I am done with this.


> * decoding:
>   * decoder for the RM(30,14) code [zecke]

I am on this now. I also have my Check Matrix but there is another way to
decide how to correct the error but my books are not very clear on that... I
think I will complete this tomorrow.


>   * soft-input/soft-decision viterbi for the RCPC code

I assume you are on this now. Should I go for code to decode sysinfo/sync_pdu
based on type3 bits?


>   * synchronizer, able to detect synchro and normal training sequence [laforge]
> 
> Once those tasks are completed, we can not only generate simulated burst bit
> patterns, but also decode them - which should be a good start for the time
> when Hopscotch' demodulator will spit out some real received bitstream.




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