Short Desc. : Block Viterbi Decoder
Overview :
The Block Viterbi Decoder IP core is a parameterizable core for decoding different combinations of convolutionally encoded sequences. The decoder core supports various code rates, constraint lengths and generator polynomials. It also allows soft-decision decoding and is capable of decoding punctured codes. The core can operate in continuous or block mode, whichever is required by the channel. Either tail-biting or zero-flushing convolutional codes can be decoded in the block mode.
Features : - Compatible with the following standards: IEEE 802.16-2004 SC PHY/ OFDM PHY, IEEEE802.11a, 3GPP, 3GPP2, and DVB-S
- Supports multiple code rates: 1/2, 1/3, ... 1/7 for non-punctured codes, 2/3, 3/4, ..., 12/13 for punctured codes, and from m/(m+1) to m/(2m-1), where m is from 1 to 12, for dynamic punctured codes
- Variable constraint length from 3 to 9
- Supports dynamically variable code rates and puncture patterns
- Dynamic BER estimation option
- One-clock synchronous design
- Hard or parameterizable soft decision decoding. Hard and soft decision for non-punctured codes and soft decision for punctured codes
- Fully parallel or hybrid implementations. For a hybrid implementation, the degree of parallelism is parameterizable
- Parameterizable trace-back length
- Signed and unsigned representations for soft decision data
- Supports parameterized puncturing patterns
- Supports both continuous and block data input
- Supports both Tail Biting and Zero Flushing block convolutional codes
- Supports both one and two traceback schemes to cater to different coding scenarios
Categories :
Portability :
Type : Soft

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