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In this paper, we investigate the link-level simulation of the time-division-duplex (TDD) based massive MIMO system employing OFDM technology. Influenced by the hardware mismatch between base station (BS) and mobile stations (MS), and the limitations of hardware implementation, the system model, simulation settings, and simulation procedures for uplink (UL) and downlink (DL) are presented to help...
Despite the popularity of the Apache Hadoop system, its success has been limited by issues such as single points of failure, centralized job/task management, and lack of support for programming models other than MapReduce. The next generation of Hadoop, Apache Hadoop YARN, is designed to address these issues. In this paper, we propose YARNsim, a simulation system for Hadoop YARN. YARNsim is based...
Developers and architects spend a lot of time trying to understand and eliminate performance problems. Unfortunately, the root causes of many problems occur at a fine granularity that existing continuous profiling and direct measurement approaches cannot observe. This paper presents the design and implementation of Shim, a continuous profiler that samples at resolutions as fine as 15 cycles; three...
Systematically exploring power, performance, and energy sheds new light on the clash of two trends that unfolded over the past decade: the rise of parallel processors in response to technology constraints on power, clock speed, and wire delay; and the rise of managed high-level, portable programming languages.
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