8 problems

Let a MISO broadcast channel be a multiple-input single-output broadcast channel, and suppose that the channel-state information at the transmitter has finite precision. Lapidoth's…

Let massive multiple-input multiple-output (MIMO) systems operate in frequency-division duplexing (FDD) mode, with uplink (UL) and downlink (DL) channels at different frequencies.…

Consider a two-user MIMO broadcast channel with private messages, arbitrary antenna configuration, and one of the four Type II hybrid CSIT models, namely the PN, DN, NP, and ND set…

Let the two-user MIMO broadcast channel with common and private messages have arbitrary antenna configuration and one of the four Type II hybrid CSIT models, namely a model in whic…

Consider a two-receiver memoryless broadcast channel with states and receiver message side information (RMSI), together with the corresponding channel without RMSI. Let a transmiss…

Feedback-frequency conjecture. Increasing the number of users should decrease the feedback frequency required to achieve the relevant DoF performance, as suggested by the outer-bou…

Full-CSI no-gain conjecture. The data-rate cannot be improved by assuming that the relays have full channel state information of the first hop.

DOSTBC-CPI data-rate conjecture. The upper bound of the data-rate of a DOSTBC-CPI should be smaller than $4/5$.