New Effective ROM Compression Methods for ROM-Based Direct Digital Frequency Synthesizer Design
- Title
- New Effective ROM Compression Methods for ROM-Based Direct Digital Frequency Synthesizer Design
- Author
- 신현철
- Keywords
- Direct digital frequency synthesizers; ROM compression
- Issue Date
- 2004-11
- Publisher
- IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
- Citation
- IEICE TRANSACTIONS ON COMMUNICATIONS, v.E87-B, Issue.11, Page.3352-3355
- Abstract
- Direct digital frequency synthesizers (DDFS) provide fast frequency switching with high spectral purity and are widely used in modem 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].
- URI
- https://repository.hanyang.ac.kr/handle/20.500.11754/154869
- ISSN
- 09168516
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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