Unitary Peak Power Reduction for Short Packet Communications in Multiple Transmit Antennas

This paper proposes a new peak-to-average power ratio (PAPR) reduction scheme for short packet communications in multiple transmit antenna environments. Instead of applying individual PAPR reduction on each antenna, a joint PAPR reduction technique is proposed. By applying a relevant unitary rotation over the transmit antennas, overall PAPR of the multiple transmit antenna system is reduced. This scheme doesn’t require any side information to decode the signal in the receiver, enabling throughputlossless PAPR reduction. Furthermore, there is no increase in the complexity of the receiver.