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Signal detection for page-accessoptical memories with intersymbol interference.
Applied Optics
|November 19, 2010
Summary
We developed a new data detection technique for optical memory that uses the Viterbi algorithm and decision feedback. This method improves bit-error-rate performance, enabling larger data pages and relaxed design tolerances for optical components.
Area of Science:
- Optical data storage
- Information theory
- Signal processing
Background:
- Two-dimensional page-access optical memory systems face challenges with data detection accuracy.
- Intersymbol interference (ISI) degrades bit-error-rate (BER) performance in optical data storage.
Purpose of the Study:
- To propose and evaluate a novel data detection technique for two-dimensional page-access optical memory.
- To enhance the bit-error-rate performance of optical memory systems affected by intersymbol interference.
Main Methods:
- Combined sequence detection using the Viterbi algorithm with decision feedback.
- Implemented a row-by-row data processing approach compatible with optical detector output.
Main Results:
- The proposed technique significantly improves bit-error-rate performance in the presence of intersymbol interference.
- The row-by-row operation simplifies data processing as it is output from the detector.
Conclusions:
- The Viterbi algorithm combined with decision feedback offers a robust solution for data detection in optical memory.
- This approach can potentially relax optical component design tolerances or allow for larger data pages.
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