Coordinated multi-point transmission of MIMO-OFDM system with per-antenna power constraints

Abstract

This paper describes an efficient approach to discrete rate and power allocation for MIMO-OFDM systems with individual power-constrained antennas. The system is configured with multiple base stations, each with a single transmit antenna, for coordinated multi-point transmissions. The traditional OFDM loading problem can be extended to the MIMO-OFDM case provided that the channel state information between all transmit and receive antennas is known. However, due to unequidistant between coordinated base stations and user terminal, a perantenna average power constraint is more practical than a total average power constraint in order to keep each antenna peak power manageable to avoid low power ..