5 papers · 1 filter
A Further Note on an Innovations Approach to Viterbi Decoding of Convolutional Codes
Masato Tajima
In this paper, we show that the soft-decision input to the main decoder in an SST Viterbi decoder is regarded as the innovation as well from the viewpoint of mutual information and…
Corrections to "An Innovations Approach to Viterbi Decoding of Convolutional Codes"
Masato Tajima
We correct errors in Section III-B of the above-titled paper. The corrections are related to the joint distribution of the inputs to the main decoder which corresponds to a branch…
Non-Linear Estimation of Convolutionally Encoded Sequences
Masato Tajima
Suppose that a convolutionally encoded sequence is transmitted symbol by symbol over an AWGN channel using BPSK modulation. In this case, pairs of the signal (i.e., code symbol) an…
Characteristic Matrices and Trellis Reduction for Tail-Biting Convolutional Codes
Masato Tajima
Basic properties of a characteristic matrix for a tail-biting convolutional code are investigated. A tail-biting convolutional code can be regarded as a linear block code. Since th…
Error-Trellis State Complexity of LDPC Convolutional Codes Based on Circulant Matrices
M. Tajima, K. Okino, T. Miyagoshi
Let H(D) be the parity-check matrix of an LDPC convolutional code corresponding to the parity-check matrix H of a QC code obtained using the method of Tanner et al. We see that the…