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Memory-related constraints (memory bandwidth, cache size) are nowadays the performance bottleneck of most computational applications. Especially in the scenario of multiple cores, the performance does not scale with the number of cores in many cases. In our work, we present our FPGA-based solution for the 3D Reverse Time Migration (RTM) algorithm. As the(More)
—Using a general polynomial approximation approach, we present an arithmetic library generator for the logarithmic number system (LNS). The generator produces optimized LNS arithmetic libraries that improve significantly over previous LNS designs on area and latency. We also provide area cost estimation and bit-accurate simulation tools that facilitate(More)
Developing highly scalable algorithms for global atmospheric modeling is becoming increasingly important as scientists inquire to understand behaviors of the global atmosphere at extreme scales. Nowadays, heterogeneous architecture based on both processors and accelerators is becoming an important solution for large-scale computing. However, large-scale(More)
One of the most essential and challenging components in a climate system model is the atmospheric model. To solve the multi-physical atmospheric equations, developers have to face extremely complex stencil kernels. In this paper, we propose a hybrid CPU-FPGA algorithm that applies single and multiple FPGAs to compute the upwind stencil for the global(More)
SUMMARY This paper presents a novel analytical model and an efficient admission control (AC) algorithm for IEEE 802.11 distributed coordinated function access mechanism. In contrast to the previous approaches, both saturated and unsaturated states of network are analyzed and the impacts of error-frame rate and retransmission limit are also taken into(More)
In order to support real-time video, audio and data communication among heterogeneous third generation (3G) handsets, 3G phones/terminals are required to support 3G-324M, the multimedia transmission protocol stack for 3G communication. This paper discusses some efficient approaches and experiences in the implementation of 3G-324M protocol stack.(More)
In the absence of infrastructure and facing the dynamically changing topology, efficient message routing is one of the most important issues in wireless ad hoc networks. Connected dominating set based routing is a promising approach for enhancing the routing efficiency in the wireless ad hoc networks. However, finding the minimum dominating set in an(More)
—3G-324M is a derivative of the ITU-T H.324 standard for low bit rate multimedia communication. H.324 and several mobile specific annexes are usually referred to as H.324M (M stands for mobile). Then the 3GPP adopted the H.324M with some modifications in codecs and error handling requirements to create the 3G-324M standard. So the 3G-324M is an " umbrella(More)