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Channel estimation protocols for wireless two-hop networks with amplify-and-forward (AF) relays are compared. We consider multiuser relaying networks, where the gain factors are chosen such that the signals from all relays add up coherently at the destinations. While the destinations require channel knowledge in order to decode, our focus lies on the channel estimates that are used to calculate the...
The first two-dimensional 13 C, 19 F correlation spectra are reported. It is shown how such spectra can be obtained with standard equipment by combining two NMR spectrometers in one experiment. The advantages of this new application of 2D NMR with respect to the 13 C spectra of polyfluorinated compounds are discussed.
The ge-SELINCOR sandwich is used to select proton magnetization by irradiating the carbon atom directly bound to the proton. This magnetization can be transferred to coupled protons by a TOCSY mixing process (MLEV-16). A 1D experiment is obtained which gives additional information when complex H,H-COSY spectra suffer from overlapping crosspeaks. Coherence pathway selection is performed with pulsed...
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