Telefonaktiebolaget LM Ericsson (publ)
Selective symbol repetition for SFBC on sPDCCH

Abstract:

When the number of Spatial Block Coded (SBC) modulation symbols in a Physical Resource Block (PRB) is not divided evenly by the number of SBC antenna ports, an SBC coded modulation symbol of a group of SBC coded modulation symbols is repeated, where the same Resource Element (RE) location is repeated on all antennas. In some embodiments, the repeated symbol is adjacent to a modulation symbol of the group that is not repeated. In other embodiments, the repeated modulation symbol is in an adjacent subcarrier to the subcarrier that carries the modulation symbol that is repeated. RE groups with relatively larger numbers of non-zero modulation symbols on a given antenna port and PRB occupy different antenna ports in different PRBs.