Electrical and Computer Engineering
2011 IEEE International Symposium on Information Theory (ISIT)
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2011 IEEE International Symposium on Information Theory Proceedings (ISIT)
IEEE International Symposium on Information Theory (ISIT)
July 31-August 5, 2011
St. Petersburg, Russia
We consider a single hop interference network with K transmitters, each with an independent message and J receivers, all having the same number (M) of antennas. Each receiver requests an arbitrary subset of the messages. This generalizes the well-known K user M antenna interference channel, where each message is requested by a unique receiver. For this setup, we derive the exact degrees of freedom (DoF) region. Our achievability scheme generalizes the interference alignment scheme proposed by Cadambe and Jafar '08. In particular, we achieve general points in the DoF region by using multiple base vectors and aligning the interference at each receiver to its largest (in the DoF sense) interferer. As a byproduct of our analysis, we recover the DoF region for the original interference channel.
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Ke, Lei; Ramamoorthy, Aditya; Wang, Zhengdao; and Yin, Huarui, "Degrees of Freedom Region for an Interference Network With General Message Demands" (2011). Electrical and Computer Engineering Conference Papers, Posters and Presentations. 22.