Ananya Sen Gupta

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Abstracf-We present a linear complexity multiuser detector that employs a joint succesive interference cancellation (SIC) technique to achieve better performance than the standard SIC detector. The key feature of Joint Successive Interference Cancellation (JSIC) is that it considers two users jointly at each stage of successive decoding. For the two-user(More)
An approach to successive interference cancellation is presented that exploits the structure of the combined signal constellation in a multiuser system. The asymptotic conditional efficiency of a successive detector is defined, based on the conditional probability of error at high signal-to-noise ratio (SNR), as a quantitative measure for evaluating(More)
A multiuser detector with scalable complexity that achieves the maximum likelihood (ML) solution for two users and gives good sub-optimal performance for a higher number of users is proposed. The key idea is to construct a look-up table based on the geometric structure of the signal constellation , and then perform fast decoding based on the look-up table.(More)
BACKGROUND Comprehensive two-dimensional gas chromatography [Formula: see text] provides high-resolution separations across hundreds of compounds in a complex mixture, thus unlocking unprecedented information for intricate quantitative interpretation. We exploit this compound diversity across the [Formula: see text] topography to provide quantitative(More)
Shallow water acoustic channel estimation techniques are presented at the intersection of time, frequency, and sparsity. Specifically, a mathematical framework is introduced that translates the problem of channel estimation to non-uniform sparse channel recovery in two-dimensional frequency domain. This representation facilitates disambiguation of slowly(More)