New Effective ROM Compression Methods for ROM-Based Direct Digital Frequency Synthesizer Design(Devices/Circuits for Communications)

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概要

• 論文の詳細を見る

• Direct digital frequency synthesizers (DDFS) provide fast frequency switching with high spectral purity and are widely used in modern spread spectrum wireless communication systems [1]. ROM-based DDFS uses a ROM lookup table to store the amplitude of a sine wave. A large ROM table is required for high spectral purity. However, a larger ROM uses more area and consumes more power. Several ROM compression methods, including Sunderland technique [2] based on simple trigonometric identities and quantization & error compensation techniques, have been reported. In this paper, we suggest several new techniques to reduce the ROM size. One new technique uses more number of hierarchical levels in ROM structures. Another technique uses simple interpolation techniques combined with hierarchical ROM structures. Experimental results show that the new proposed techniques can reduce the required ROM size up to 24%, when compared to that of a resent approach [6].

• 社団法人電子情報通信学会の論文
• 2004-11-01

著者

• Shin Hyunchul

  The Department Of Electrical And Computer Engineering Hanyang University

• LEE Jinchoul

  the Department of Electrical and Computer Engineering, Hanyang University

• Lee Jinchoul

  The Department Of Electrical And Computer Engineering Hanyang University

関連論文

• New Effective ROM Compression Methods for ROM-Based Direct Digital Frequency Synthesizer Design(Devices/Circuits for Communications)

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