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World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

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The effect of pipelining feedback loops in high speed DSP systems

Alexander, S.W. and Stewart, R.W. (2005) The effect of pipelining feedback loops in high speed DSP systems. In: UNSPECIFIED.

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Abstract

Many of today’s Electronic Design Automation (EDA) tools include Intellectual Property (IP) cores that are fully pipelined to increase data throughput. Using these cores to implement data paths that do not involve feedback can result in fast, efficient designs. However, if they are used within a feedback loop this is not always the case. This paper examines the effects that using pipelined cores in feedback loops can have on a design. By considering two designs that implement a Givens rotation using feedback, which is used in QR decomposition [1], it is shown that, even though a pipelined design can be clocked faster, its data throughput is less than a non-pipelined design. Also, the non-pipelined design is shown to be smaller and consumes less power. Finally, a suggestion for a more efficient use of pipelining in feedback loops is presented, based on channel interleaving [2].