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Power minimization in IC design: principles and applications,"
- ACM Transactions on Design Automation of Electronic Systems,
, 1996
"... Abstract Low power has emerged as a principal theme in today's electronics industry. The need for low power has caused a major paradigm shift in which power dissipation is as important as performance and area. This article presents an in-depth survey of CAD methodologies and techniques for des ..."
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Cited by 200 (31 self)
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Abstract Low power has emerged as a principal theme in today's electronics industry. The need for low power has caused a major paradigm shift in which power dissipation is as important as performance and area. This article presents an in-depth survey of CAD methodologies and techniques for designing low power digital CMOS circuits and systems and describes the many issues facing design- ers at architectural, logic and physical levels of design abstraction. It reviews some of the techniques and tools that have been proposed to overcome these difficulties and outlines the future challenges that must be met to design low power, high performance systems.
Low-Power Encodings for Global Communication in CMOS VLSI
, 1997
"... Technology trends and especially portable applications are adding a third dimension (power) to the previously two-dimensional (speed, area) VLSI design space [30]. A large portion of power dissipation in high performance CMOS VLSI is due to the inherent difficulties in global communication at high r ..."
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Cited by 52 (2 self)
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Technology trends and especially portable applications are adding a third dimension (power) to the previously two-dimensional (speed, area) VLSI design space [30]. A large portion of power dissipation in high performance CMOS VLSI is due to the inherent difficulties in global communication at high rates and we propose several approaches to address the problem. These techniques can be generalized at different levels in the design process. Global communication typically involves driving large capacitive loads which inherently require significant power. However, by carefully choosing the data representation, or encoding, of these signals, the average and peak power dissipation can be minimized. Redundancy can be added in space (number of bus lines), time (number of cycles) and voltage (number of distinct amplitude levels). The proposed codes can be used on a class of terminated off-chip board-level buses with level signaling, or on tri-state on-chip buses with level or transition signalin...
Low Power Implementations for Adaptive Filters
"... Abstract. In this text we present an approach for reducing switching activity in adaptive filters. We show how to introduce substantial approximations into the basic QR algorithm that underlies many applications of adaptive filters, such as beamforming, echo cancellation, channel equalization, or sy ..."
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Abstract. In this text we present an approach for reducing switching activity in adaptive filters. We show how to introduce substantial approximations into the basic QR algorithm that underlies many applications of adaptive filters, such as beamforming, echo cancellation, channel equalization, or system identification. These approximations work within the CORDIC devices that form the basic elements of the array formulation of an updating QR algorithm. They directly lead to a reduced hardware demand of the filter structure. We demonstrate the feasibility of this approach by presenting simulation results of an adaptive channel equalizer. 1
Radio Science Incremental refinement of a multi-user-detection algorithm (II)
"... Abstract. Multi-user detection is a technique proposed for mobile radio systems based on the CDMA principle, such as the upcoming UMTS. While offering an elegant solution to problems such as intra-cell interference, it demands very significant computational resources. In this paper, we present a hig ..."
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Abstract. Multi-user detection is a technique proposed for mobile radio systems based on the CDMA principle, such as the upcoming UMTS. While offering an elegant solution to problems such as intra-cell interference, it demands very significant computational resources. In this paper, we present a high-level approach for reduc-ing the required resources for performing multi-user detec-tion in a 3GPP TDD multi-user system. This approach is based on a displacement representation of the parameters that describe the transmission system, and a generalized Schur al-gorithm that works on this representation. The Schur algo-rithm naturally leads to a highly parallel hardware implemen-tation using CORDIC cells. It is shown that this hardware architecture can also be used to compute the initial displace-ment representation. It is very beneficial to introduce incremental refinement structures into the solution process, both at the algorithmic level and in the individual cells of the hardware architecture. We detail these approximations and present simulation re-sults that confirm their effectiveness. 1
