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Accurate and sparse representation of a moderately fast fading channel using bases functions is achievable when both channel and bases bands align. If a mismatch exists, usually a larger number of bases functions is needed to achieve the same accuracy. In this paper, we propose a novel approach for channel estimation based on frames, which preserves sparsity and improves estimation accuracy. Members...
The Ricean K-factor is a practical channel quality measure in many wireless communication applications as it exhibits a fast estimation convergence compared with the explicit estimation of performance metrics such as error rates. Recently, it has been shown that estimation of the K-factor can be improved relative to envelope-based detectors through the use of complex (I/Q) channel observations. In...
Achievable rates of communication systems with pilot-based channel estimation are investigated. Analytical expressions for the maximum achievable rates of such systems are derived for a given quality of estimation. It is shown how the classical waterfllling algorithm should be modified for the case of imperfect channel state information at the transmitter. The impact of the estimation scheme on achievable...
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