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- W2607541536 abstract "In this article a framework is presented for the joint optimization of the analog transmit and receive filter with respect to a channel estimation problem. At the receiver, conventional signal processing systems restrict the bandwidth of the analog pre-filter $B$ to the rate of the analog-to-digital converter $f_s$ in order to comply with the well-known Nyquist sampling theorem. In contrast, here we consider a transceiver that by design violates the common paradigm $Bleq f_s$. To this end, at the receiver we allow for a higher pre-filter bandwidth $B>f_s$ and study the achievable channel estimation accuracy under a fixed sampling rate when the transmit and receive filter are jointly optimized with respect to the Bayesian Cram'{e}r-Rao lower bound. For the case of a channel with unknown delay-Doppler shift we show how to approximate the required Fisher information matrix and solve the transceiver design problem by an alternating optimization algorithm. The presented approach allows us to explore the Pareto-optimal region spanned by transmit and receive filters which are favorable under a weighted mean squared error criterion. We discuss the complexity of the obtained transceiver design by visualizing the resulting ambiguity function. Finally, we verify the achievable performance of the proposed designs by Monte-Carlo simulations of a likelihood-based channel estimator." @default.
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- W2607541536 date "2017-04-25" @default.
- W2607541536 modified "2023-09-27" @default.
- W2607541536 title "Joint Transmit and Receive Filter Optimization for Sub-Nyquist Wireless Channel Estimation." @default.
- W2607541536 hasPublicationYear "2017" @default.
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