GNR

Gorjiara, Bita; Reshadi, Midia; Gajski, Daniel D.

doi:10.1016/b978-012374287-2.50016-1

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…These properties make ASG-VTS one of the best choices for design space exploration of increasingly complex systems. We have also developed a Web-based interface for the ASG-VTS algorithm [Gorjiara 2004]. …”

Section: Discussionmentioning

confidence: 99%

“…Our results show that ASG-VTS achieves 39% energy savings over the baseline. This example is available in our on-line tool [Gorjiara 2004]. …”

Section: Gsm Vocoder [European Telecommunication Standards Institute mentioning

confidence: 99%

“…This combination of speed and high-quality solutions makes it an ideal core algorithm for system-level DSE tools. We have also developed a web-based interface for ASG-VTS algorithm [Gorjiara 2004]. Any user can try out this algorithm by uploading a system description in XML format.…”

Section: Contributionsmentioning

confidence: 99%

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Ultra-fast and efficient algorithm for energy optimization by gradient-based stochastic voltage and task scheduling

Gorjiara

Bagherzadeh

Chou

2007

ACM Trans. Des. Autom. Electron. Syst.

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This paper presents a new technique, called Adaptive Stochastic Gradient Voltage-and-TaskScheduling (ASG-VTS), for power optimization of multicore hard realtime systems. ASG-VTS combines stochastic and energy-gradient techniques to simultaneously solve the slack distribution and task reordering problem. It produces very efficient results with few mode transitions. Our experiments show that ASG-VTS reduces number of mode transitions by 4.8 times compared to traditional energy-gradient-based approaches. Also, our heuristic algorithm can quickly find a solution that is as good as the optimal for a real-life GSM encoder/decoder benchmark. The runtime of ASG-VTS is 150 times and 1034 times faster than energy-gradient based and optimal ILP algorithms, respectively. Since the runtime of ASG-VTS is very low, it is ideal for design space exploration in system-level design tools. We have also developed a web-based interface for ASG-VTS algorithm.

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Section: Discussionmentioning

confidence: 99%

“…Our results show that ASG-VTS achieves 39% energy savings over the baseline. This example is available in our on-line tool [Gorjiara 2004]. …”

Section: Gsm Vocoder [European Telecommunication Standards Institute mentioning

confidence: 99%

See 1 more Smart Citation

Ultra-fast and efficient algorithm for energy optimization by gradient-based stochastic voltage and task scheduling

Gorjiara

Bagherzadeh

Chou

2007

ACM Trans. Des. Autom. Electron. Syst.

Self Cite

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Flexible and efficient architecture design for MIMO MMSE-IC linear turbo-equalization

Rizk¹,

Baghdadi²,

Jézéquel³

et al. 2013

2013 Third International Conference on Communications and Information Technology (ICCIT)

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International audienceThe variety of wireless communication standards and their corresponding applications requires more and more flexible, yet efficient, implementations. The emerging flexibility need induces a new challenge when added to the ever increasing requirements in terms of high throughput and low complexity. This paper presents a design of an application-specific processor dedicated for a minimum mean square error interference cancellation (MMSE-IC) linear equalizer (LE) used in iterative multi-input multi-output (MIMO) turbo receiver. The explored design approach applies static scheduling of datapath control signals. The proposed architecture supports the requirements of flexibility for different MIMO system configurations concerning channel time selectivity and transmission diversity. In order to evaluate the efficiency of the adopted architecture model for this kind of applications and requirements, a fair comparison is conducted with a state-of-the-art application specific instruction-set processor (ASIP) implementation. The obtained results illustrate a significant performance improvement in terms of execution time and implementation area while using identical computational resources and supporting same flexibility parameters

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Design and prototyping flow of NISC-based flexible MIMO turbo-equalizer

Rizk

Baghdadi

Jézéquel

et al. 2014

2014 25nd IEEE International Symposium on Rapid System Prototyping

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International audienceFlexible design implementations are increasingly explored in digital communication applications to cope with diverse configurations imposed by the emerging communication standards. On the other hand, rapid hardware prototyping is a crucial requirement in system validation and performance evaluation under various use case scenarios. Adding flexibility, and hence increasing system complexity on one hand, and shrinking design time to meet with market pressure on the other hand, require a productive design approach ensuring final design quality. By eliminating the instruction set overhead, No-Instruction-Set-Computer (NISC) approach fulfills these design requirements offering static scheduling of datapath, automated RTL synthesis and allowing designer to have direct control of hardware resources. This paper presents a case study of an NISC-based implementation of a flexible low-complexity MIMO turbo-equalizer. The complete design and prototype flow, from architecture specification till FPGA implementation, is described in details. Using VC707 evaluation board integrating Xilinx Virtex-7 FPGA, the prototype of 2×2/4×4 spatially multiplexed MIMO system achieves a throughput of 115.8/62.4 Mega symbols per second at a clock cycle frequency of 202.67 MHz. Furthermore, the flexibility of the demonstrated prototype allows supporting all communication modes defined in LTE, WiFi, WiMAX, and DVB-RCS wireless communication standards

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GNR

Cited by 3 publications

References 6 publications

Ultra-fast and efficient algorithm for energy optimization by gradient-based stochastic voltage and task scheduling

Ultra-fast and efficient algorithm for energy optimization by gradient-based stochastic voltage and task scheduling

Flexible and efficient architecture design for MIMO MMSE-IC linear turbo-equalization

Design and prototyping flow of NISC-based flexible MIMO turbo-equalizer

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