Veeresh Taranalli

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Polar codes are high density parity check codes and hence the sparse factor graph, instead of the parity check matrix, has been used to practically represent an LP polytope for LP decoding. Although LP decoding on this polytope has the ML-certificate property, it performs poorly over a BAWGN channel. In this paper, we propose modifications to adaptive cut(More)
Mobile phones are playing an important role in changing the socio-economic landscapes of emerging economies like India. A proper voice-based user authentication will help in many new mobile based applications including mobilecommerce and banking. We present our exploration and evaluation of an experimental set-up for user authentication in remote Indian(More)
Channel modeling for NAND flash memories is a developing research area with applications to better signal processing and coding techniques for flash memories. In [1], [2], the empirical cell threshold voltage distributions of multi-level cell (MLC) flash memories are modeled using known probability distributions to derive parametric channel models. The(More)
Polar codes provably achieve the capacity of binary memoryless symmetric (BMS) channels with low complexity encoding and decoding algorithms, and their finite-length performance on these channels, when combined with suitable decoding algorithms (such as list decoding) and code modifications (such as a concatenated CRC code), has been shown in simulation to(More)
The beta-binomial (BBM) channel model was recently proposed to model the overdispersed statistics of empirically observed bit errors in multi-level cell (MLC) flash memories. In this paper, we study the capacity of the BBM channel model for MLC flash memories. Using the compound channel approach, we first show that the BBM channel model capacity is zero.(More)
Defined through a certain 2×2 matrix called Arikan's kernel, polar codes are known to achieve the symmetric capacity of binary-input discrete memoryless channels under the successive cancellation (SC) decoder. Yet, for short blocklengths, polar codes fail to deliver a compelling performance under the low complexity SC decoding scheme. Recent(More)
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