175 citations · 874 across the 35 of their papers we have counts for
37 papers · 1 filter
Low Complexity Channel Estimation for OTFS Modulation with Fractional Delay and Doppler
Imran Ali Khan, Saif Khan Mohammed
We consider the problem of accurate channel estimation for OTFS based systems with few transmit/receive antennas, where additional sparsity due to large number of antennas is not a…
Spectral Efficiency of OTFS Based Orthogonal Multiple Access with Rectangular Pulses
Venkatesh Khammammetti, Saif Khan Mohammed
In this paper we consider Orthogonal Time Frequency Space (OTFS) modulation based multiple-access (MA). We specifically consider Orthogonal MA methods (OMA) where the user terminal…
Low Complexity Precoding and Detection in Multi-user Massive MIMO OTFS Downlink
Brijesh Chander Pandey, Saif Khan Mohammed, P. Raviteja +2
We consider the problem of degradation in performance of multi-carrier multi-user massive MIMO systems when channel induced Doppler spread is high. Recently, Orthogonal Time Freque…
OTFS Based Random Access Preamble Transmission For High Mobility Scenarios
Alok Kumar Sinha, Saif Khan Mohammed, P. Raviteja +2
We consider the problem of uplink timing synchronization for Orthogonal Time Frequency Space (OTFS) modulation based systems where information is embedded in the delay-Doppler (DD)…
Derivation of OTFS Modulation from First Principles
Saif Khan Mohammed
Orthogonal Time Frequency Space (OTFS) modulation has been recently proposed to be robust to channel induced Doppler shift in high mobility wireless communication systems. However,…
Time-Domain to Delay-Doppler Domain Conversion of OTFS Signals in Very High Mobility Scenarios
Saif Khan Mohammed
In Orthogonal Time Frequency Space (OTFS) modulation, information symbols are embedded in the delay-Doppler (DD) domain instead of the time-frequency (TF) domain. n order to ensure…