The Degrees of Freedom Region of the MIMO Interference Channel with Hybrid CSIT

Mohanty, Kaniska; Vaze, Chinmay S.; Varanasi, Mahesh K.

doi:10.48550/arxiv.1209.0047

Cited by 1 publication

(3 citation statements)

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“…Specifically, the DoF region of MIMO networks (BC/IC) in this setting with general antenna configuration and general current CSIT qualities has been fully characterized, thanks to a simple yet unified framework employing interference quantization, block-Markov encoding and backward decoding techniques. Our DoF regions generalize a number of existing results under more specific CSIT settings, such as delayed CSIT [5][6][7], perfect CSIT [2,3], partial/hybrid/mixed CSIT [23][24][25]. The results further shed light on the benefits of the temporally correlated channel, when such correlation can be opportunistically taken into account for a system design.…”

Section: Discussionsupporting

confidence: 75%

“…It is worth noting that our results embrace the previously reported particular cases: the perfect CSIT setting [2,3] (i.e., current CSIT of perfect quality), the pure delayed CSIT setting [6,7] (i.e., current CSIT of zero quality), the partial/hybrid CSIT MIMO BC/IC case [23][24][25] (with perfect CSIT at one receiver and delayed CSIT at the other one), and the special MISO case [13][14][15] with N 1 = N 2 = 1, symmetric MIMO case [16], as well as the MISO case with asymmetric current CSIT qualities [18].…”

Section: Introductionsupporting

confidence: 76%

“…are inactive; hybrid CSIT (i.e., perfect CSIT for one channel and delayed CSIT for the other one) case [25] for…”

Section: Proofmentioning

confidence: 99%

See 2 more Smart Citations

The Degrees of Freedom Region of Temporally Correlated MIMO Networks With Delayed CSIT

Yang

Gesbert

et al. 2014

IEEE Trans. Inform. Theory

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We consider the temporally-correlated Multiple-Input Multiple-Output (MIMO) broadcast channels (BC) and interference channels (IC) where the transmitter(s) has/have (i) delayed channel state information (CSI) obtained from a latency-prone feedback channel as well as (ii) imperfect current CSIT, obtained, e.g., from prediction on the basis of these past channel samples based on the temporal correlation. The degrees of freedom (DoF) regions for the two-user broadcast and interference MIMO networks with general antenna configuration under such conditions are fully characterized, as a function of the prediction quality indicator. Specifically, a simple unified framework is proposed, allowing to attain optimal DoF region for the general antenna configurations and current CSIT qualities.Such a framework builds upon block-Markov encoding with interference quantization, optimally combining the use of both outdated and instantaneous CSIT. A striking feature of our work is that, by varying the power allocation, every point in the DoF region can be achieved with one single scheme. As a result, instead of checking the achievability of every corner point of the outer bound region, as typically done in the literature, we propose a new systematic way to prove the achievability.

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