Title :
Achievable degrees of freedom of the K-user interference channel with partial cooperation
Author :
Naguib, Ahmed A. ; Elsayed, Khaled ; Nafie, Mohammed
Author_Institution :
EECE Dept., Cairo Univ., Cairo, Egypt
Abstract :
In this paper, we consider the K-user interference channel with partial cooperation, where a strict subset of the K users cooperate. For the K-user interference channel with cooperating subsets of length M, the outer bound of the total degrees of freedom is KM/(M+1). In this paper, we propose a signal space-based interference alignment scheme that proves the achievability of these degrees of freedom for the case K= M+2 The proposed scheme consists of a design for the transmit precoding matrices and a processing algorithm which we call the Successive Interference Alignment (SIA) algorithm. The decoder of each message uses the SIA algorithm to process the signals received by the M cooperating receivers in order to get the maximum available degrees of freedom.
Keywords :
interference (signal); radio receivers; wireless channels; K-user interference channel; degrees of freedom; message decoder; partial cooperation; receivers; signal space-based interference alignment scheme; successive interference alignment; transmit precoding matrices; Algorithm design and analysis; Integrated circuits; Interference channels; Receivers; Transmitters; Vectors; Degrees of freedom; cooperation; interference alignment;
Conference_Titel :
Signals, Systems and Computers (ASILOMAR), 2011 Conference Record of the Forty Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
978-1-4673-0321-7
DOI :
10.1109/ACSSC.2011.6190239