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Signal Processing Systems. 01/2011; 63:83-94.
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Proceedings of the CGO 2009, The Seventh International Symposium on Code Generation and Optimization, Seattle, Washington, USA, March 22-25, 2009; 01/2009
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ABSTRACT: Many embedded DSP systems can be characterized as streaming applications. Imperative programming languages are ill suited for describing the concurrency within these DSP systems. SPEX is a language extension designed to let the programmers describe the inherent parallelism within DSP systems. In this paper, we highlight SPEXpsilas language features for describing the streaming computation and communication patterns of DSP systems, and allowing the compiler to generate efficient code for embedded DSP architectures. This language extension is based on the parameterized dataflow computation model, with modifications to better describe DSP systemspsila complex streaming patterns. SPEX is applied as an extension onto the C++ programming language. It consists of a set of language constructs for describing the semantics of parameterized dataflow computations, and a set of language restrictions for helping the embedded compilation process. In this paper, the W-CDMA wireless protocol is used as our case study.
Proceedings of the 2008 International Conference on Embedded Computer Systems: Architectures, Modeling and Simulation (IC-SAMOS 2008), Samos, Greece, July 21-24, 2008; 01/2008
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ABSTRACT: Previous studies have shown that wireless DSP algorithms exhibit high levels of data level parallelism (DLP). Commercial and research work in the field of software defined radio (SDR) has produced designs utilizing single-instruction multiple-data (SIMD) execution units to exploit this high level of parallelism. These designs have been able to deliver the efficiency and computational power needed to process 3G wireless technologies. Though efficient 3G processing has been achieved, next generation 4G SDR technology requires 10-1000x more computational performance but limits the power budget increase to 2-5x. In this paper, we present a breakdown of 4G and analyze the scalability of SIMD to see if it can help to meet the 4G requirement. We take a proposed SDR architecture, SODA, and modify it for different widths in order to calculate its efficiency. We consider the trade-offs with respect to computation and energy efficiency.
Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2008, March 30 - April 4, 2008, Caesars Palace, Las Vegas, Nevada, USA; 01/2008 · 4.63 Impact Factor
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Mark Woh, Yuan Lin,
Sangwon Seo,
Scott A. Mahlke,
Trevor N. Mudge,
Chaitali Chakrabarti,
Richard Bruce,
Danny Kershaw,
Alastair Reid,
Mladen Wilder,
Krisztián Flautner
41st Annual IEEE/ACM International Symposium on Microarchitecture (MICRO-41 2008), November 8-12, 2008, Lake Como, Italy; 01/2008
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IEEE Micro. 01/2007; 27:114-123.
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Embedded Computer Systems: Architectures, Modeling, and Simulation, 7th International Workshop, SAMOS 2007, Samos, Greece, July 16-19, 2007, Proceedings; 01/2007
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Proceedings of the 2007 International Conference on Compilers, Architecture, and Synthesis for Embedded Systems, CASES 2007, Salzburg, Austria, September 30 - October 3, 2007; 01/2007
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Proceedings of the IEEE Workshop on Signal Processing Systems, SiPS 2006, Proceedings, October 2-4, 2006, Banff, Alberta, Canada; 01/2006
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High Performance Embedded Architectures and Compilers, First International Conference, HiPEAC 2005, Barcelona, Spain, November 17-18, 2005, Proceedings; 01/2005
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ABSTRACT: High-throughput, low-power Software Defined Radio(SDR) solutions require multi-core SIMD DSP processors to meet real-time performance requirements. Given the difficulty in programming traditional DSPs, these new multi-core signal processors provide even greater challenges for programmers and compilers. In this paper, we describe SPEX, a program-ming language which is aimed at narrowing the semantic gap between the description of complex SDR systems and their implementations. SPEX supports three different types of programming semantics, allowing SDR solutions to be developed with a divide-and-conquer approach. For DSP al-gorithm kernels, SPEX is able to support DSP arithmetics and first-class vector and matrix variables with sequential language semantics. From wireless protocol channels, it is able to support sequences of data-processing computations with dataflow language semantics. And for protocol sys-tems, it is able to support real-time deadlines and concurrent executions with synchronous language semantics. The de-sign choices are motivated by our experience implementing W-CDMA protocol on a reprogrammable substrate. In the paper, we also briefly explain SPEX's compilation strate-gies.
