On the spatial degrees of freedom benefits of reverse TDD in multicell MIMO networks. Fanjul, J. & Santamaria, I. In 2016 24th European Signal Processing Conference (EUSIPCO), pages 1363-1367, Aug, 2016.
On the spatial degrees of freedom benefits of reverse TDD in multicell MIMO networks [pdf]Paper  doi  abstract   bibtex   
In this paper we study the degrees of freedom (DoF) achieved by interference alignment (IA) for cellular networks in reverse time division duplex (R-TDD) mode, a new configuration associated to heterogeneous networks. We derive a necessary feasibility condition for interference alignment in the multi-cell R-TDD scenario, which is then specialized to the particular case of symmetric demands and antenna distribution. We show that, for those symmetric networks for which the properness condition holds with equality, R-TDD does not improve the DoF performance of conventional synchronous TDD systems. Nevertheless, our simulation results indicate that, in more asymmetric scenarios, significant DoF benefits can be achieved by applying the R-TDD approach.
@InProceedings{7760471,
  author = {J. Fanjul and I. Santamaria},
  booktitle = {2016 24th European Signal Processing Conference (EUSIPCO)},
  title = {On the spatial degrees of freedom benefits of reverse TDD in multicell MIMO networks},
  year = {2016},
  pages = {1363-1367},
  abstract = {In this paper we study the degrees of freedom (DoF) achieved by interference alignment (IA) for cellular networks in reverse time division duplex (R-TDD) mode, a new configuration associated to heterogeneous networks. We derive a necessary feasibility condition for interference alignment in the multi-cell R-TDD scenario, which is then specialized to the particular case of symmetric demands and antenna distribution. We show that, for those symmetric networks for which the properness condition holds with equality, R-TDD does not improve the DoF performance of conventional synchronous TDD systems. Nevertheless, our simulation results indicate that, in more asymmetric scenarios, significant DoF benefits can be achieved by applying the R-TDD approach.},
  keywords = {cellular radio;interference (signal);MIMO communication;time division multiplexing;spatial degrees of freedom;reverse TDD;multicell MIMO networks;degrees of freedom;interference alignment;cellular networks;reverse time division duplex;R-TDD;antenna distribution;DoF performance;synchronous TDD systems;Interference;Uplink;Antennas;Downlink;Cellular networks;Base stations;MIMO;Interference alignment;cellular networks;heterogeneous networks;reverse TDD;degrees of freedom},
  doi = {10.1109/EUSIPCO.2016.7760471},
  issn = {2076-1465},
  month = {Aug},
  url = {https://www.eurasip.org/proceedings/eusipco/eusipco2016/papers/1570247524.pdf},
}
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