Flag manifold-based precoder interpolation techniques for MIMO-OFDM systems

S Nijhawan, A Gupta, K Appaiah… - IEEE Transactions …, 2021 - ieeexplore.ieee.org
The use of channel state information (CSI) at the transmitter significantly enhances the
performance of wireless communication systems. However, the requirement of CSI feedback …

Design of discrete-time matrix all-pass filters using subspace Nevanlinna pick interpolation

AS Bharath, DS Gaharwar, K Appaiah, D Pal - Signal Processing, 2023 - Elsevier
Unitary matrix-valued functions of frequency are matrix all-pass systems, since they preserve
the norm of the input vector signals. Typically, such systems are represented and analyzed …

Lattice All-Pass Filter based Precoder Adaptation for MIMO Wireless Channels

P Mehta, AS Bharath, K Appaiah… - IEEE Transactions …, 2024 - ieeexplore.ieee.org
Smart vehicles employ multiple-input multiple-output (MIMO) communication links in
conjunction with orthogonal frequency division multiplexing (OFDM) for enhanced data rates …

Efficient Parameterized Precoder Tracking in Slowly Time-Varying MIMO Channels

N Kolla, K Appaiah, R Chopra - IEEE Communications Letters, 2022 - ieeexplore.ieee.org
Precoding in MIMO wireless communication systems is essential for achieving high data
rates. However, feeding back precoders places a feedback burden. Exploiting temporal …