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This paper presents the design and implementation of a high-throughput Sorted QR Decomposition (SQRD) circuit for MIMO communication systems. The proposed design is architected based on a novel pipelined Givens Rotation structure comprising of multi-dimension CORDIC elements. Furthermore, this circuit reduces the excessive delays of norm-calculations and sorting operations, and thus the time efficiency...
Traffic from mobile wireless networks has been growing at a fast pace in recent years and is expected to surpass wired traffic very soon. Service providers face significant challenges at such scales including providing seamless mobility, efficient data delivery, security, and provisioning capacity at the wireless edge. In the Mobility First project, we have been exploring clean slate enhancements...
By explicitly indicating which algorithms they use and encapsulating these algorithms within software components, programmers make it possible for an algorithm-aware compiler to replace their original algorithm implementations with compatible parallel implementations, or with the parallel implementations of compatible algorithms, using the so-called specification compatibility graph (SCG). Along with...
Hardware customization is an effective approach for meeting application performance requirements while achieving high levels of energy efficiency. Application-specific processors achieve high performance at low energy by tailoring their designs towards a specific workload, i.e., an application or application domain of interest. A fundamental question that has remained unanswered so far though is to...
The autonomous learning capability of UAV (unmanned aerial vehicle) has gained more and more attentions of researchers. As far as helicopter steering is concerned, instead of calculating dynamics of UAV in a relative short interval, pilots just take their experience and consciousness instantaneously, known as similar status has similar action, to keep the helicopter hovering. The experience and the...
Replicated distributed file systems are designed to store large file reliably across lots of machines, and it arouse the problem of selecting the nearest replica for clients. In this paper, we propose Rigel, a Network Coordinates (NC) based nearest replica selection service, which is an effective infrastructure to select the nearest replica for client in a scalable and lightweight way. Our simulation...
Compressive sensing (CS) is a superior signal sampling strategy that combines sampling and compression. CS-based imaging systems include sampling and reconstruction stages. Currently, the complex task of image reconstruction has only been implemented in software, which can only achieve very limited speed. This paper proposes a high-speed hardware architecture for the reconstruction of compressively-sensed...
Anycast paradigm has been widely adopted by Internet application to find nearby resources. The current IP anycast implementation suffers from poor scalability. To overcome that, this paper proposes Proxima, a network coordinates (NC) based application layer infrastructure, which is capable to provide lightweight and flexible anycast service. Proxima accurately chooses the best receiver from a group...
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