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In order to relieve reliability problem caused by technology scaling, LDPC codes have been widely applied in flash memories to provide high error correction capability. However, LDPC read performance slowdown along with data retention largely weakens the access speed advantage of flash memories. This paper considers to apply the concept of refresh, that were used for flash lifetime improvement, to...
This paper proposes to improve read performance of LDPC based flash memory by exploiting process variation (PV). The work includes three parts. First, a block grouping approach is proposed to classify the flash blocks based on their reliability. Second, based on the grouping approach, a read data placement scheme is proposed, which is designed to place read-hot data on flash blocks with high reliability...
Flash memory development through technology scaling and bit density has significant impact on the reliability of flash cells. Hence strong error correction code (ECC) schemes are highly recommended. With a strong error correction capability, low-density-parity code (LDPC) is now applied for the state-of-the-art flash memory. However, LDPC has long decoding latency when the raw bit error rates (RBER)...
Wireless Sensor Networks are sets of thousands or more of sensor nodes with very small size and limited energy, scattered over particular area to sense a certain physical phenomenon. Energy constraints are the most important challenge for these networks to work efficiently for long time. Most existing clustering algorithms are applied without considering the density of region. In this paper, density-aware...
Integrated Modular Avionics (IMA) systems had been promoting computation resource sharing mainly in the form of central processing modules. Distributed IMA provides virtual backplanes for embedded processing modules, which are distributed physically into an aircraft. Beyond the concept of virtual resource sharing inside a platform, cloud computing paradigm is introduced to avionics systems in order...
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