2012/09/15 by Qing F. Zhou, Zhou, Qing F., Q. T. Zhang +3
Computer Science · Engineering · Mathematics · #Advanced MIMO Systems Optimization #Advanced Wireless Communication Technologies #Cooperative Communication and Network Coding #FOS: Computer and information sciences #Information Theory (cs.IT) #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.1209.3366
The proof of Theorem 3 is revised. arXiv admin note: text overlap with arXiv:1209.3137
openalex publication_date 2012/09/15 · arxiv created 2012/10/11 · arxiv updated 2012/10/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
This paper first studies the homogeneous 3-user 2x1 broadcast channel (BC) with no CSIT. We show a sufficient condition for it to achieve the optimal 3/2 degrees of freedom (DoF) by using Blind Interference Alignment (BIA). BIA refers to the interference alignment method without the need of CSIT. It further studies the 2x1 broadcast network in which there are K>=3 homogeneous single-antenna users, and their coherence time offsets are independently and uniformly distributed. We show that, if K>=11, the two-antenna transmitter can find, with more than 95% certainty, three users to form a BIA-feasible 3-user BC and achieve the optimal 3/2 DoF.