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- W2133848130 abstract "The context of this paper is adaptive waveform design for estimating parameters of an unknown channel under average energy constraints. This paper focuses on the simpler problem of adaptive waveform-amplitude design for which we obtain interesting analytical results. We treat an TV-step design problem where a fixed waveform can be transmitted into the channel N times with amplitudes that can be chosen as a function of past channel outputs. For N = 2 and a linear Gaussian channel model, we derive the optimal amplitude to transmit at the second step as a function of the first measurement. This adaptive 2-step energy allocation strategy yields a mean-squared error (MSE) improvement of at least 1.7 dB relative to the optimal non-adaptive strategy. Motivated by the optimal two-step strategy we propose a suboptimal adaptive TV-step strategy that can achieve an MSE improvement of more than 5 dB for N = 50. Applications of our results to MIMO and inverse scattering channel models are discussed." @default.
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- W2133848130 date "2007-04-01" @default.
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- W2133848130 title "Sequential Energy Allocation Strategies for Channel Estimation" @default.
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- W2133848130 doi "https://doi.org/10.1109/icassp.2007.366806" @default.
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