Apparatus of selectively performing fast hadamard transform and fast fourier transform, and CCK modulation and demodulation apparatus using the same
US7391632B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Nov 14, 2005 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Sep 24, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/145
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A Fast Fourier Transform (FFT) apparatus for selectively performing Fast Hadamard transform (FHT), and a complementary code keying (CCK) modulation/demodulation apparatus using the same. An OFDM module and CCK module are integrated as one module having lower complexity compared to conventional scheme by embodying the CCK modulation using FFT structure in the OFDM module, and embodying the suboptimal and the optimized CCK modulations using FFT structure in OFDM module. CDMA, OFDM, CCK modules may be integrated as single module.
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