| Autor: |
Andries P. Hekstra, Willem M. J. M. Coene, Albert H. J. Immink |
| Přispěvatelé: |
Signal Processing Systems, Signal processing for communications |
| Jazyk: |
angličtina |
| Rok vydání: |
2006 |
| Předmět: |
|
| Zdroj: |
IEEE Transactions on Magnetics, 43(7), 3333-3339. Institute of Electrical and Electronics Engineers |
| ISSN: |
0018-9464 |
| Popis: |
In optical storage, data can be arranged on the disc in a meta-spiral consisting of a large number of bit-rows with a small track-pitch. Successive revolutions of the meta-spiral are separated by a narrow guard band. For high storage densities, such a system results in severe 2-D inter-symbol interference. In the multi-track Viterbi algorithm (MVA) of Krishnamoorthi and Weeks, the complex problem of 2-D bit-detection is broken down into a number of smaller bit-detection problems on sets of adjacent bit-rows called stripes. We improve the bit error rate (bER) performance of such a 2-D bit-detector via a number of measures such as: 1) weighing of the separate contributions to the branch metrics from each bit-row in a stripe and 2) inclusion of an additional contribution to the branch metrics from a bit-row adjacent to a stripe. In addition, we reduce the computational complexity by varying the number of bit-rows per stripe during successive iterations of the MVA, and through the use of local sequence feedback. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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