2014/01/20 by Quan Geng, Geng, Quan, Tie Liu +1
Computer Science · Engineering · Mathematics · #Advanced MIMO Systems Optimization #Cooperative Communication and Network Coding #FOS: Computer and information sciences #Information Theory (cs.IT) #Wireless Communication Security Techniques #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.1401.5092
13 pages, 1 figure
arxiv created 2014/01/20 · openalex publication_date 2014/01/20 · arxiv updated 2014/01/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider symmetric two-user Gaussian interference channel with common messages. We derive an upper bound on the sum capacity, and show that the upper bound is tight in the low interference regime, where the optimal transmission scheme is to send no common messages and each receiver treats interference as noise. Our result shows that although the availability of common messages provides a cooperation opportunity for transmitters, in the low interference regime the presence of common messages does not help increase the sum capacity.