A simplified computational kernel for trellis-based decoding
Publikation/Tidskrift/Serie: IEEE Communication Letters
A simplified branch metric and add-compare-select (ACS) unit is presented for use in trellis-based decoding architectures. The simplification is based on a complementary property of best feedforward and some systematic feedback encoders. As a result, one adder is saved in every other ACS unit. Furthermore, only half the branch metrics have to be calculated. It is shown that this simplification becomes especially beneficial for rate 1/2 convolutional codes. Consequently, area and power consumption will be reduced in a hardware implementation.
- Electrical Engineering, Electronic Engineering, Information Engineering
- very large-scale
- Viterbi decoding
- integration (VLSI)
- branch metric
- add-compare-select (ACS)
- Digital ASIC: Flexible Coding and Decoding for Wireless Personal Area Networks
- Informations- och kommunikationsteori
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- ISSN: 1089-7798