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An Efficient Pre-Traceback Approach for Viterbi Decoding in Wireless Communication
 

Summary: An Efficient Pre-Traceback Approach for Viterbi
Decoding in Wireless Communication
Yao Gang1,Tughrul Arslan1,2,Ahmet T Erdogan1,2
1
School of Electrical Engineering, Edinburgh University, Edinburgh EH9 3JL,UK
2
Institute for System Level Integration, Livingston, EH54 7EG, UK
Email: y.gang@ed.ac.uk
Abstract-- An efficient pre-traceback architecture for the sur-
vivor path memory unit (SMU) of Viterbi Decoder(VD) targeting
wireless communication applications is proposed. Compared to
the conventional traceback approach which is based on three
kinds of memory access operations: decision bits write, traceback
read and decode read, the proposed architecture exploits the
inherent parallelism between the decision bit write and the decode
traceback operation by introducing a pre-traceback operation. The
proposed pre-traceback approach reduces the survivor memory
read operations by 50%. As a result of the reduction of the
memory access operations, the size of the survivor memory as
well as the decoding latency is reduced by as much as 25%.

  

Source: Arslan, Tughrul - School of Engineering and Electronics, University of Edinburgh

 

Collections: Engineering