Abstract
Multi-rate digital signal processing(DSP) algorithms are usually modeled by synchronous dataflow graphs(SDFGs). Performing with high enough throughput is a key real-time requirement of a DSP algorithm. Therefore how to decrease the iteration period of an SDFG to meet the real-time requirement of the system under consideration is a very important problem. Retiming is a prominent graph transformation technique for performance optimizing. In this paper, by proving some useful properties about the relationship between an SDFG and its equivalent homogeneous SDFG(HSDFG), we present an efficient retiming algorithm, which needn't convert the SDFG to HSDFG, for finding a feasible retiming to reduce the iteration period of an SDFG as required.
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