Fraunhofer-gesellschaft Zur F&#xd6;rderung Der Angewandten Forschung E.v.

Fraunhofer-gesellschaft Zur Förderung Der Angewandten Forschung E.v.

Sutharshun Varatharaajan

Markus Landmann

Venkatesh Ramireddy

Marcus Großmann

Marcus Grossmann

A communication device for providing a channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a time-variant, frequency-selective MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration including a number of antenna ports, and downlink signals including the reference signal configuration; and a processor. The processor estimates an explicit CSI in the frequency domain using measurements on the downlink reference signals on the radio channel, selects a Doppler-delay precoder matrix (W) for a composite Doppler-delay-beam three-stage precoder, calculates either one or more of a channel quality indicator, CQI, and/or a precoder matrix indicator, PMI, and/or a rank indicator, RI, and reports to the transmitter the CSI feedback including either one or more of the CQI, and/or the PMI and/or the RI.

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Erlangen, Germany

Sutharshun Varatharaajan