Kothapalli V. Srinivas

Learn More
Spatial multiplexing (SM) over multiple-input multiple-output wireless channels provides significant capacity gains. In a SM scheme, the eigenmode having the least signal-to-noise ratio (SNR), degrades the overall error rate performance. In this paper, we propose co-ordinate interleaved spatial multiplexing that maximizes the minimum SNR over all(More)
— In this paper, we propose and analyze a coordinate interleaved non-orthogonal amplify and forward (CINAF) protocol for the single antenna half-duplex relay channel. Compared to a conventional non-orthogonal amplify and forward (NAF) protocol, the proposed protocol achieves full diversity for all transmitted symbols. The proposed precoding scheme also has(More)
Methylmalonic acidemia (MMA) is an inborn error of metabolism that results in the accumulation in blood, and increased excretion in the urine of, methylmalonic acid. It may present either as an acute, often fatal, condition in infancy, or in a more chronic intermittent form in older children. Organ involvement including kidneys has been described. We report(More)
—Performance of spatial multiplexing multiple-input multiple-output (MIMO) wireless systems can be improved with channel state information (CSI) at both ends of the link. This paper proposes a new linear diagonal MIMO transceiver, referred to as coordinate interleaved spatial multiplexing (CISM). With CSI at transmitter and receiver, CISM diagonalizes the(More)
—Vertical layering with successive interference cancellation (SIC) at the receiver (e.g. V-BLAST) is a popular spatial multiplexing scheme that achieves high data rates over multi-antenna wireless channels. However, SIC suffers from low diversity gains and recently, with limited feedback, a diversity optimal SIC receiver has been proposed based on greedy QR(More)
— When channel state information is available at the transmitter, we can diagonalize a MIMO channel with SVD transceivers. However, outage of the weaker eigenchannels limits the performance of such a transceiver. In the current work, we propose and analytically characterize coordinate interleaving of multi-dimensional symbols over sets of eigenchannels. We(More)
A 53-year-old renal allograft recipient developed nocardial cerebral abscess. It manifested clinically with encephalitis, polycythemia, convulsions, syndrome of inappropriate secretion of antidiuretic hormone (SIADH) and a space-occupying lesion presenting as multiple ring shadows in the left fronto-parietal lobe on computerized tomography (CT scan) of the(More)