Channel estimation relying on the minimum bit-error-ratio criterion for BPSK and QPSK signals

The authors consider the channel estimation problem in the context of a linear equaliser designed for a frequency selective channel, which relies on the minimum bit-error-ratio (MBER) optimisation framework. Previous literature has shown that the MBER-based signal detection may outperform its minimum-mean-square-error (MMSE) counterpart in the bit-error-ratio performance sense. In this study, they develop a framework for channel estimation by first discretising the parameter space and then posing it as a detection problem. Explicitly, the MBER cost function (CF) is derived and its performance studied, when transmitting BPSK and QPSK signals. It is demonstrated that the MBER based CF aided scheme is capable of outperforming existing MMSE, least square-based solutions

Herbal immunomodulators as add on treatment in asymptomatic and mildly symptomatic COVID-19 confirmed cases: findings from a prospective single centre clinical trial

Background: The aim of the present study was to evaluate safety and efficacy of Sri Sri TattvaTM immunity products, a combination of single herb and poly herb formulations in COVID-19 patients by assessing their clinical features and immune markers. The products when administered orally for a period of 14 days in COVID-19 patients demonstrated significant improvement in clinical symptoms.Methods: Patients with fever, cough, sore throat started responding to the treatment from day 3 and most of the patients were clinically free of symptoms by day 7. Early recovery from signs and symptoms was observed in most of the patients. Sri Sri TattvaTM immunity products has also demonstrated an excellent clinical improvement and immune markers including tumor necrosis factor (TNF-alfa), interleukin (IL-6), interferon (IFN-beta), D-dimer, ferritin, lactate dehydrogenease (LDH) and C-reactive protein (CRP) in COVID-19 patients.Results: The final results of this study showed that Sri Sri TattvaTM immunity products reduced the time to clinical cure and number of days in achieving negative real time polymerase chain reaction (RT-PCR) by early viral clearance when given along with standard of care thus reduced the duration of hospitalization.Conclusions: In the present study, 82% of COVID-19 patients cleared the virus within 10-14 days of study period reducing the duration of hospitalization. None of the patients progressed to severe COVID-19 and succumbed to the disease. This clearly indicates that Sri Sri TattvaTM immunity products when administered orally along with standard of care has definitive role in the management of COVID-19 patients