Orthogonal frequency-division multiplexing (OFDM) combines the advantages of high
performance and relatively low implementation complexity. However, for reliable coherent …

In this paper, we deal with channel estimation for orthogonal frequency-division multiplexing
(OFDM) systems. The channels are assumed to be time-varying (TV) and approximated by a …

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 …

Orthogonal Frequency Division Multiplexing (OFDM) technique has received a lot of interest
in mobile communication research lately. For wideband mobile communication systems, the …

In this paper, the problem of joint carrier frequency offset (CFO) and channel estimation for
OFDM systems over the fast time-varying frequency-selective channel is explored within the …

It is well-known that time-varying channels can provide time diversity and improve error rate
performance compared to time-invariant fading channels. However, exploiting time diversity …

The number of coefficients for estimating time-varying channel is generally much larger than
the maximum number of observable data. Linearly time-varying channel (LTV) models have …

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 …

With the development of high-speed trains (HSTs) in many countries, providing broadband
wireless services in HSTs is crucial. Orthogonal frequency-division multiplexing (OFDM) has …

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 …