mjb/altos/src/core/ao_viterbi.c, branch 1.5

altos: rename ao_viterbi.c to ao_fec_rx.c

2012-06-27T05:16:44+00:00

Keep it parallel with ao_fec_tx.c Signed-off-by: Keith Packard

altos: Incremental viterbi decode

2012-06-25T13:51:36+00:00

Decode radio input one interleave block at a time. This overlaps the decode computation with the packet reception, leading to lower latency in an attempt to keep up with the transmitter. Signed-off-by: Keith Packard

altos: decode cc1120 received packets

2012-06-25T13:38:34+00:00

Call the fec decode function, compute RSSI and check CRC Signed-off-by: Keith Packard

altos: Get cc1120 packet reception working

2012-06-25T12:03:34+00:00

Interrupt-per-bit, but it seems to work Signed-off-by: Keith Packard

altos: improve FEC apis to reduce data copying

2012-06-23T23:05:42+00:00

Integrate interleaving and whitening into encode and decode steps. Add CRC checking function for receive. Make ao_fec_test program round-trip the data and verify correctness. Signed-off-by: Keith Packard

altos: fix comment about decoding last byte of FEC data

2012-06-23T09:23:08+00:00

There aren't *any* forward bits to use when decoding the last byte. Signed-off-by: Keith Packard

altos: optimize Viterbi implementation

2012-06-23T09:12:58+00:00

Minimize data usage, make data arrays static Signed-off-by: Keith Packard

altos: incremental viterbi decode

2012-06-23T07:54:42+00:00

Decode bits incrementally. Don't bother decoding the last byte; it's always a pad byte. Signed-off-by: Keith Packard

altos: Start optimizing viterbi decoder

2012-06-23T06:31:11+00:00

Only need two cost arrays (previous and next). Create constant full-width decoder table instead of expanding bits into bytes for each decode step. Signed-off-by: Keith Packard

altos: Add the simplest possible viterbi decoder

2012-06-23T06:12:02+00:00

I think I understand how it works now. It's not exactly speedy, and it uses a lot of memory. Signed-off-by: Keith Packard