Abstract:

When a blast system employs the successive interference cancellation (SUC) method to detect signal, the diversity orders of transmitter antennas are not equal to each other, resulting in the different statistical characteristic among the channels of different transmitter antennas.In this case, the antenna average energy allocation (AAEA) method is not optimal in achieving the largest channel capacity.In this paper, based on analysis of channel ergodic capacity of a blast system, an antenna optimization energy allocation (AOEA) method is proposed.It is proved by capacity upperbound analysis that, by employing this method, channel ergodic capacity can be maximized.Simulation results show that channel capacity is improved at low SNR with the AAOA method.

Key words: MIMO, Blast, capacity