2010/11/29 by Juho Park, Park, Juho, Youngchul Sung +3
Computer Science · Engineering · Mathematics · #Advanced MIMO Systems Optimization #Antenna Design and Analysis #Antenna Design and Optimization #E.4 #FOS: Computer and information sciences #H.1.1 #Information Theory (cs.IT) #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.1011.6121
30 pages, 5 figures. Submitted to IEEE Transactions on Information Theory
arxiv created 2010/11/29 · openalex publication_date 2010/11/29 · arxiv updated 2010/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This paper considers several linear beamformer design paradigms for multiuser time-invariant multiple-input multiple-output interference channels. Notably, interference alignment and sum-rate based algorithms such as the maximum signal-to-interference-plus noise (max-SINR) algorithm are considered. Optimal linear beamforming under interference alignment consists of two layers; an inner precoder and decoder (or receive filter) accomplish interference alignment to eliminate inter-user interference, and an outer precoder and decoder diagonalize the effective single-user channel resulting from the interference alignment by the inner precoder and decoder. The relationship between this two-layer beamforming and the max-SINR algorithm is established at high signal-to-noise ratio. Also, the optimality of the max-SINR algorithm within the class of linear beamforming algorithms, and its local convergence with exponential rate, are established at high signal-to-noise ratio.