Abstract
When using direct digital synthesizer (DDS) technology to generate sine signals, the amplitude precision and the look-up table scale restrict each other; a large-scale look-up table for high precision output is often impractical owing to the limitation of capacity. To this problem, a high-precision sine signal generation algorithm based on compressed look-up table is proposed. Firstly, an analysis is given between the relationship of the DDS precision and the look-up table scale, which provides theoretical rules for the design of the look-up table. Then, an efficient compressed look-up table is constructed according to the requirement of precision, the relationship between look-up table scale and compression ratio is given. Finally, the implementation of the algorithm is presented, signal precision and compression ratio are confirmed through simulation, for a signal with an amplitude of 10 6 and a precision of 10 -5, the compression ratio of 10 7 is obtained.
Original language | English |
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Pages (from-to) | 249-252 |
Number of pages | 4 |
Journal | Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics |
Volume | 34 |
Issue number | 2 |
DOIs | |
Publication status | Published - Feb 2012 |
Keywords
- Compressed look-up table
- Direct digital synthesizer (DDS)
- High-precision sine signal
- Sunderland algorithm