Our paper “A Simple Random Access Scheme with Multilevel Power Allocation” has been accepted for publication in the IEEE Communications Letters.
Our paper “Diversity-Multiplexing Tradeoff of Dynamic Harvest-and-Foward Cooperation” has been accepted for publication in the IEEE Wireless Commun. Lett, which was co-authored with Prof. I. Krikidis and Dr. C. K. Ho.
Our paper entitled “Frameless ALOHA with Multiple Base Stations” has been accepted to Asilomar’15 will be held at Asilomar Conference Grounds, CA.
The program is available at the following website:
Prof. Giuseppe Abreu from Jacobs University Bremen, Germany, is now visiting our laboratory.
He will stay until the end of August and we have started a joint research project about the secrecy capacity.
Our paper entitled “spatially-coupled repeat accumulate coded cooperation” has been accepted to IEEE WCNC’15 will be held at New Orleans, LA.
The program of Track1 (PHY and Fundamentals) is available at the following website:
The paper proposes the effective technique to simultaneously obtain the diversity and coding gain even when both the number of users and the length of information packets are limited. The proposed approach significantly improves the decoding performance compared with conventional cooperative techniques.
Professor Ishibashi gave a special guest lecture about RF energy harvesting and cooperative communications at Jacobs University Bremen in Bremen, Germany on Dec 8, 2014.
Abstract: In this talk, we provide an overview of radio frequency (RF) energy harvesting technology, which scavenges the energy from ambient radio signals. As an example of wireless-powered cooperative diversity, we introduce dynamic-harvest-and-forward (DHF) cooperation which enables to obtain diversity gain with consuming neither extra energy nor extra bandwidth by exploiting the relay’s proximity advantage over the destination. We analyze the DHF cooperation from the aspect of diversity-multiplexing tradeoff (DMT) and prove that it can achieve diversity order of two. Also, some open issues regarding cooperative diversity with RF energy harvesting are presented.
Further details can be found in the following link:
Assistant Professor Koji Ishibashi was promoted to Associate Professor on Dec. 1 2014.