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Low-Power Embedded DSP Core for Communication Systems

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Author(s): Tsao Ya-Lan | Chen Wei-Hao | Tan Ming Hsuan | Lin Maw-Ching | Jou Shyh-Jye

Journal: EURASIP Journal on Advances in Signal Processing
ISSN 1687-6172

Volume: 2003;
Issue: 13;
Start page: 232360;
Date: 2003;
Original page

Keywords: digital signal processor | embedded system | dual MAC | subword multiplier

ABSTRACT
This paper proposes a parameterized digital signal processor (DSP) core for an embedded digital signal processing system designed to achieve demodulation/synchronization with better performance and flexibility. The features of this DSP core include parameterized data path, dual MAC unit, subword MAC, and optional function-specific blocks for accelerating communication system modulation operations. This DSP core also has a low-power structure, which includes the gray-code addressing mode, pipeline sharing, and advanced hardware looping. Users can select the parameters and special functional blocks based on the character of their applications and then generating a DSP core. The DSP core has been implemented via a cell-based design method using a synthesizable Verilog code with TSMC 0.35 m SPQM and 0.25 m 1P5M library. The equivalent gate count of the core area without memory is approximately 50 k. Moreover, the maximum operating frequency of a version is 100 MHz (0.35 m) and 140 MHz (0.25 m).
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