The limited time available for acquiring the channel state in mobile broadband wireless
communication systems makes it crucial to count with channel estimation methods that attain …

A reduced complexity channel estimation for OFDM systems with transmit diversity is
proposed by exploiting the correlation of the adjacent subchannel responses. The sizes of …

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 …

We compare diverse frequency-domain multiplexed pilot arrangement schemes for time-
varying channel estimation in an orthogonal frequency-division multiplexing (OFDM) system …

In Orthogonal Frequency Division Multiplexing (OFDM) systems over fading channels,
channel estimation is carried out by transmitting pilot symbols in different patterns. The …

Performance of wireless OFDM systems significantly depends on channel estimation
accuracy. However, it is difficult to take into account all possible scenarios as the variance of …

Modern communication systems are based on orthogonal frequency division multiplexing
(OFDM). They are designed for dealing with frequency selective channels considering …

Channel estimation is a key issue to OFDM systems no matter for inter-carrier interference
cancellation or for symbol detection. The difficulty with a fast-fading OFDM channel lies 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 …

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 …