2016/02/10 by Milad Johnny, Johnny, Milad, Mohammad Reza Aref +1
Computer Science · Engineering · Mathematics · #Advanced MIMO Systems Optimization #Energy Harvesting in Wireless Networks #FOS: Computer and information sciences #Information Theory (cs.IT) #Wireless Communication Security Techniques #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.1602.03328
15 pages, 4 figures, This paper submitted to IEEE Transactions on Wireless Communications and partially IWCIT 2016. arXiv admin note: text overlap with arXiv:1408.6427 by other authors
arxiv created 2016/02/10 · openalex publication_date 2016/02/10 · arxiv updated 2016/02/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, we consider the problem of the interference alignment for the K-user SISO interference channel with blind channel state information at transmitters (CSIT). Our achievement in contrast to popular K-user interference alignment (IA) scheme has more practical notions. In this case every receiver is equipped with one reconfigurable antenna which tries to place its desired signal in a subspace which is linearly independent from interference signals. We show that if the channel values are known to the receivers only, the sum degrees-of-freedom (DOF) rate region of the linear BIA with staggered antenna switching is (Kr)/(r2-r+K), where r = \lceil(√(1+4K)-1)/(2) \rceil. The result indicates that the optimum DoF rate region of the K-user interference channel is to achieve the DoF of (√(K))/(2) for an asymptotically large network. Thus, the DoF of the K-user interference channel using staggered antenna switching grows sub-linearly with the number of the users, whereas it grows linearly in the case where transmitters access the CSI. In addition we propose both achievability and converse proof so as to show that this is the DoF rate region of blind interference alignment (BIA) with staggered antenna switching.