- IEEE SIGNAL PROCESSING LETTERS Journal
- February 2019
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- We characterize the degrees of freedom (DoF) of the two-tier heterogeneous networks without channel state information at the transmitters or cooperation among transmitters. We consider conventional transmitters while the users are equipped with a multimode receiver. In contrast to previous works focused on two-tier networks, the derived DoF consider the management of the intracell, the intercell, and intertier interference. The derived hounds define the DoF region for any two-tier network. Furthermore, these hounds are achievable by combining blind interference alignment schemes properly.
- degrees of freedom; 2-tier networks; blind interference alignment; multi-mode receivers; blind interference alignment