منابع مشابه
Viterbi Decoding of Convolutional Codes
At the receiver, we have a sequence of voltage samples corresponding to the parity bits that the transmitter has sent. For simplicity, and without loss of generality, we will assume 1 sample per bit. In the previous lecture, we assumed that these voltages have been digitized to form a received bit sequence. If we decode this received bit sequence, the decoding process is termed hard decision de...
متن کاملTruncation length for Viterbi decoding
A bound is derived and analyzed for the bit error rate (BER) of a Viterbi decoder with survivor truncation. Estimates of the SNR loss on the AWGN channel, due to truncation are obtained for convolutional codes. Larger truncation lengths are required than the smallest value that does not effectively decrease the code’s free distance, especially at low Eb/No.
متن کاملTruncation Effects in Viterbi Decoding
Practical Viterbi decoders often fall significantly short of full maximum likelihood decoding (MLD) pe;formance because of survivor truncation efiects. In this paper, we study the tradeoff between truncation length and performance loss for the two most common variations of Viterbi’s algorithm: best state decoding (BSD) and fized state decoding (FSD). We find that FSD survivors should be about t...
متن کاملList Viterbi Decoding with Continuous Error Detection
The List Viterbi Algorithm (LVA) with an arithmetic coding based continuous error detection (CED) scheme is applied to high-order partial-response magnetic recording channels. Commonly used magnetic recording systems employ distance-enhancing codes along with parity-check post-processors to correct most dominant error events. The system presented here inserts a CED encoder between the outer Ree...
متن کاملViterbi-based Decoding Algorithm for DBO-CSS
657 Abstract— Differential detection algorithm for DBO-CSS based on maximum signal energy detection (MSED) using viterbi algorithm is proposed. In order to mitigate SNR degradation caused by differential decoding, a modified viterbi algorithm with so called correlation metric (CM) in every state is proposed. It is shown that the performance gain of the proposed algorithm when compared with that...
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ژورنال
عنوان ژورنال: IEEE Transactions on Information Theory
سال: 2013
ISSN: 0018-9448,1557-9654
DOI: 10.1109/tit.2013.2246815