Orthogonal chirp division multiplexing (OCDM) was recently introduced as a new multi-
carrier scheme based on the chirp spread spectrum (CSS) and shown to be more robust to …

Orthogonal chirp division multiplexing (OCDM) is a spread spectrum technique that
leverages the orthogonality of cyclically shifted linear chirp signals to maximize spectral …

In multiple-input multiple-output (MIMO) systems, channel estimation is of crucial importance
to guarantee reliable recovery of ultra-high-speed MIMO signals. This paper proposes a …

Orthogonal chirp division multiplexing (OCDM) has recently become an appealing scheme
for high-speed communications. However, due to the spreading feature of OCDM systems in …

Orthogonal chirp division multiplexing (OCDM) is a recently proposed multiplexing scheme
and has drawn increasing attention in underwater communications. In an OCDM system, a …

Pilot-aided channel estimation allows the receiver to acquire channel state information (CSI)
for each multicarrier block by multiplexing data and pilot symbols in the same block, as long …

Envisaged network scaling in the beyond 5G and 6G era makes the optical transport of high
bandwidth radio signals a critical aspect for future radio access networks (RANs), while the …

Underwater communications are fundamental techniques for the Internet of Underwater
Things (IoUT) to establish information links among underwater devices. Recently …

Orthogonal chirp-division multiplexing (OCDM) has been recently proposed as an
alternative scheme to orthogonal frequency-division multiplexing (OFDM) for data …

In this letter, we first present a time-domain model for pilot-assisted MMSE channel
estimation in the orthogonal chirp division multiplexing (OCDM) systems. Then by proposing …