Turbo Decoder Applications
The WiMedia Alliance is a non-profit organization that promotes and certifies ultra-wide band (UWB) technologies. In version 1.5 of its physical layer, the WiMedia standard adopted LDPC codes for high data rates (payload throughputs of up to 1 Gbit/s). For lower rates, convolutional codes are used. The standard defines two block lengths: 1200 and 1320. The long blocks are obtained by a re-encoding of the short blocks with a rate 10/11 LDPC code. These additional parity bits are transmitted on the guard tones of an OFDM symbol for throughputs of 640 Mbit/s and above. The receiver, however, is allowed to ignore these 120 additional parity bits for decoding.
Standard |
MultiBand OFDM Physical Layer Specification |
||
PHY Specification: Final Deliverable 1.5 | |||
Organization | WiMedia Alliance | ||
Publication | 2009 | ||
Documents | WiMedia PHY Specification 1.5 | ||
Applications | Wireless Personal Area Networks (WPAN) | ||
IP Core | Creonic WiMedia 1.5 LDPC Encoder/Decoder IP Core | ||
LDPC Codes | 8 | ||
Block Length | Submatrix Size | Code Rates | |
1200 | 30 | 1/2, 5/8, 3/4, 4/5 | |
1320 | 30 | 5/11, 25/44, 15/22, 8/11 |

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