Degrees of Freedom of the MIMO 3-Way Channel


H. Maier, A. Chaaban, R. Mathar,


        In the present paper, we consider the Degrees-of-Freedom (DoF) of a multiple-input multiple-output (MIMO) 3-way channel with an arbitrary number of antennas at each user. This channel provides a particular extension of the two-way channel to three users. Therein, three users exchange six messages in total, i. e., there is one message from each user to each of the two other users. We derive upper bounds on the DoF of the channel and show that those are achievable by MIMO interference alignment (IA) and zero-forcing beam-forming. We show that the network has a number of 2M2 DoF where Mj represents the number of antennas at user j, and M1 ? M2 ? M3 .

BibTEX Reference Entry 

	author = {Henning Maier and Anas Chaaban and Rudolf Mathar},
	title = "Degrees of Freedom of the {MIMO} 3-Way Channel",
	pages = "638-642",
	booktitle = "{IEEE} International Symposium on Information Theory and Its Applications (ISITA 2014)",
	address = {Melbourne, VIC, Australia},
	month = Oct,
	year = 2014,
	hsb = hsb999910369206 ,


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