Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Soft-decision decoding"”.
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Coding Techniques for Linear Block Codes With Applications to Fault Identification
… channel reliability information is available, soft-decision decoding becomes attractive for many applications, since maximum-likelihood (ML) soft-decision decoding offers (roughly) 3 dB additional gain over algebraic decoding. Since ML soft-decision decoding is an NP-hard problem, we …
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On the construction, dimensionality, and decoding of linear block code trellises
… the use of longer error control codes and soft-decision maximum-likelihood (ML) decoding. Unfortunately, the implementation of such techniques is limited by the computational requirements of the decoder. In this thesis, we consider several aspects of trellis-based ML, and 'near-ML', …
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Design and testing of a real time simulation for Trellis Coded Modulation
… number of memory elements, v. For TCM schemes, soft decision decoding, based on euclidean distance, rather than hard decision decoding, based on hamming distance, is used. Ungerboeck developed a mapping of encoder bits to channel signals on a constellation diagram. The mapping is called mapping …
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Concatenation of Space-Time Block Codes with ConvolutionalCodes
… block coded systems utilizing both hard and soft decision decoding. Simulation results are presented and are compared with the analytical results.
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Efficient signal, code, and receiver designs for MIMO communication systems
… them with tilted-QAM codes using hard and soft decision decoding to obtain good performance at moderate SNR. These new systems are compared to orthogonal space-time coded systems, which we show to achieve near optimal performance at low SNR. We also examine traditional sequential versions …
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Contributions to the decoding of linear codes over Z4
This thesis explores various hard and soft decision decoding techniques for linear codes over Z4, all of which, offer substantial coding gains over classical algebraic decoding. We focus only on codes which are free, i.e., (n, k, d) linear codes whose canonical images over GF(2) are (n, k) linear …
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A hardware implementation of a Viterbi decoder for a (3,2/3) TCM code
… of the Viterbi algorithm is based on using soft decision decoding to produce an estimate of how well the received sequence corresponds with any of the allowed code sequences. The code sequences which most closely matches the received sequence is then decoded to form the output of the …