On coding and decoding for high-order partial response systems
| Autor: | Masuo Umemoto |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Channel code
Signal processing Interleaving Computer science Data_CODINGANDINFORMATIONTHEORY Electronic Optical and Magnetic Materials Partial response Electrical and Electronic Engineering High order Algorithm Decoding methods Computer Science::Information Theory Communication channel Coding (social sciences) |
| Zdroj: | IEEE Transactions on Magnetics. 34:80-84 |
| ISSN: | 0018-9464 |
| DOI: | 10.1109/20.663453 |
| Popis: | High-data-rate signal processing for hard disk drives is discussed. A recording channel is equalized as a partial response (PR) (1+D)(1-D/sup 3/), where D is a delay operator. Furthermore, 1/(1+D) pre-coding scheme is used, and the resulting response is given as (1-D/sup 3/), which achieves three-bit interleaving. The working speed of each Viterbi detector in interleaving PR channels is reduced to one third of the original bit-frequency. The performance of the reduced two-state Viterbi detector in the interleaving PR channel is compared with the conventional two-state Viterbi detector of the PR4 system. As a result, the proposed system improves the signal-to-noise ratio by about 3.0 db compared with the baseline PR4 maximum system. Finally, it is shown that the Error Coding (ECC) scheme for the interleaving needs a reversed hierarchy of ECC and channel coding. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|