6 papers
Non Orthogonal Multiple Access with Orthogonal Time Frequency Space Signal Transmission
Aritra Chatterjee, Vivek Rangamgari, Shashank Tiwari +1
Orthogonal time frequency space (OTFS) is being pursued in recent times as a suitable wireless transmission technology for use in high mobility scenarios. In this work, we propose…
OTFS: Interleaved OFDM with Block CP
Vivek Rangamgari, Shashank Tiwari, Suvra Sekhar Das +1
Orthogonal time frequency space (OTFS) modulation is a recently proposed waveform for reliable communication in high-speed vehicular communication scenarios. It has better resilien…
Circularly Pulse Shaped Orthogonal Time Frequency Space Modulation
Shashank Tiwari, Suvra Sekhar Das
Orthogonal time-frequency space (OTFS) modulation is a recently proposed waveform for efficient data transfer in high-speed vehicular scenarios. The use of rectangular pulse shape…
Low Complexity LMMSE Receiver for OTFS
Shashank Tiwari, Suvra Sekhar das, Vivek Rangamgari
Orthogonal time frequency space modulation is a two dimensional (2D) delay-Doppler domain waveform. It uses inverse symplectic Fourier transform (ISFFT) to spread the signal in tim…
Design of Low Complexity GFDM Transceiver
Shashank Tiwari, Suvra Sekhar Das
In this work, we propose a novel low complexity Generalised Frequency Division Multiplexing (GFDM) transceiver design. GFDM modulation matrix is factorized into FFT matrices and a…
Precoded GFDM System to Combat Inter Carrier Interference : Performance Analysis
Shashank Tiwari, Suvra Sekhar Das, Kalyan Kumar Bandyopadhyay
The expected operating scenarios of 5G pose a great challenge to orthogonal frequency division multiplexing (OFDM) which has poor out of band (OoB) spectral properties, stringent s…