Intrinsic degrees of freedom for MIMO interference channel

Xiaojuan Bai: Also with the College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China Intrinsic degrees of freedom (IDoF) which are the measure about the relative transmission ability of a channel from a transmitter to a receiver in the current transmit power at finite signal-to-noise power ratio are proposed. According to the IDoF of the subchannel in every dimension of channel space, the number of spatial dimensions allocated to the interferer by the interference avoiding technique, which is no more than the maximum number of subchannels associated with the decreasing IDoF of the transmission channel due to interference in the multiuser multi-antennas interference channel, is given from an information-theory perspective. © The Institution of Engineering and Technology 2013.