Abstract:

A novel linear precoding scheme is introduced for CoMP multiuser multiple-input multiple-output downlink Systems based on joint-processing mode. By carrying out a channel extension approach and applying a matrix decomposition method with low complexity, this precoding algorithm can effectively suppress noise and multiuser interference simultaneously and can be applied to the system configuration with arbitrary number of antennas for each user. Additionally, a suboptimal power allocation algorithm is introduced under the total power constraint of all the base stations. Complexity analysis and performance simulation demonstrate that the proposed precoding algorithm can not only degrade computational complexity of the central control station in general, but also can achieve enhanced system performance.

Key words: precoding, coordinated multi-point, multiuser, channel extension, power allocation