All-bit-line MLC flash memories: Optimal detection strategies
- Resource Type
- Conference
- Authors
- Huang, Xiujie; Asadi, Meysam; Kavcic, Aleksandar; Santhanam, Narayana Prasad
- Source
- 2014 IEEE International Conference on Communications (ICC) Communications (ICC), 2014 IEEE International Conference on. :3883-3888 Jun, 2014
- Subject
- Communication, Networking and Broadcast Technologies
Detectors
Computer architecture
Ash
Microprocessors
Channel models
Noise
Measurement
- Language
- ISSN
- 1550-3607
1938-1883
We are concerned with the optimal detector design for the all-bit-line MLC flash memory. We provide a channel model of the MLC flash memory, where the channel parameters are mathematically tractable. Then we present an optimal maximum a-posteriori sequence detector. The optimal detector can be executed over a trellis whose branch metrics can be computed by using Fourier transforms of analytically computable characteristic functions (corresponding to likelihood functions). The soft-output detectors for both simple one-dimensional channel models and more realistic page-orientated two-dimensional channel models are derived. Simulation results show not only that the soft-output detector has the same hard-output bit-error-rate performance as some previously known detectors did, but that the soft-output detector outperforms previously known detectors by a gain of 0.23 dB.