RAM-search processor for intersymbol interference cancellation
US6532272B1 · kind B1 · utility
11Cited by
14References
30Claims
0Family size
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Key dates
| Filing date | Aug 12, 1999 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Aug 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03605
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of canceling intersymbol interference (ISI) for a signal bit ak at time k, where k&egr;{0, ±1, ±2, . . . } in data transmission and data storage channels, by modelling the channel; training a RAM with known values for ak to acquire the model of the channel; searching for the optimal address for the RAM, with past, present, and future values of ak, to be used in minimizing the ISI in the received signal; and canceling ISI from the received signal. A RAM-search method and apparatus is presented which operates in cooperation with Viterbi detection and decoding, as well as with BCJR-APP detection and decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.