Capacity in MIMO Channels Based on Different Power Allocation

Wireless channel capacity is an important indicator for a measure of mobile communications network to accommodate the largest number of users. The analysis and study on MIMO channels capacity is benifit to network´s construction and optimization. This paper gives three kinds of channel capacity equation when different power allocation is adopted, especially deduces approximate expression of MIMO channel capacity in low SNR. Theory of wireless communication and matrix is applied to deducing conclusion. Channel capacity can be improved and complexity of computing is reduced in different situations.