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A joint estimation and compensation algorithm of the carrier frequency offset (CFO) and sampling clock offset (SCO) is proposed for orthogonal frequency division multiplexing (OFDM) systems under multipath fading channels. First, we propose the joint weighted least-squares (JWLS) algorithm with intercarrier interference (ICI) cancellation to enhance the accuracy of the CFO and SCO estimation. Next,...
This paper investigates the problem of joint estimation of carrier frequency offset (CFO) and channel response for OFDM systems. In deriving the solution of the joint maximum likelihood (JML) estimator, the channel model absorbs the effects of the unknown carrier phase offset and symbol timing error. It is shown that a highly efficient JML algorithm can be cleverly obtained in two steps, consisting...
In this paper, a multiple input multiple output (MIMO) channel estimation scheme is proposed with both high accuracy and computational efficiency for sparse multipath channel. This algorithm exploits the optimal MIMO preamble based on repeated phase-rotated Chu sequences, and iteratively estimates the number and positions of the sparsely spaced multipath components by using the generalized AIC criterion...
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