Channel estimation is critical to receiver performance in an OFDM system. Pilot symbols are
typically interspersed with data symbols among the sub-carriers to aid channel estimation …

A novel, reduced complexity iterative channel estimation algorithm for OFDM systems using
superimposed pilots is proposed. It utilizes past channel estimations of double correlated …

The performance of channel estimation in OFDM systems significantly depends on the pilot
signal, which is usually scattered in the time and frequency domains. For a given pilot …

We find that placing each pilot tone in an equally spaced manner according to the
conventional placement scheme is not suitable for doubly selective channel estimation. In …

This paper proposes a channel estimation algorithm using super-imposed pilots for OFDM
systems. The pilot symbols are added linearly to the modulated data symbol at a fraction of …

The choice of channel estimation is of fundamental importance in OFDM receiver designs,
which further involves a trade-off between complexity and estimation accuracy. In pilot …

This paper analyzes the degradation effect of null subcarriers in orthogonal frequency
division multiplexing (OFDM) systems on the time-domain maximum likelihood (ML) …

Wireless communication systems are increasingly adopting orthogonal frequency division
multiplexing (OFDM) to enable efficient high-data rate transmissions. Such systems often …

Orthogonal frequency division multiplexing (OFDM) became a popular transmission
approach since it suppresses intersymbol interference (ISI) due to large channel delays …

The performance of channel estimation in orthogonal frequency division multiplexing
(OFDM) systems significantly depends on the pilot signal, which is usually scattered in time …