A novel DHT-based ultra-wideband system

In this paper, a low complexity orthogonal frequency division multiplexing (OFDM) system is proposed for use in high-speed ultra-wideband physical links. Discrete Hartley transform (DHT) and its inverse are employed to perform modulation/demodulation. A data-aided channel estimation algorithm is derived. Both the computational complexity and hardware cost of this system are much lower than that of conventional DFT-based OFDM. The system parameters are designed according to IEEE 802.15.3a channel models and configured with different combinations of modulation, channel coding, and spreading. The system performance is verified via simulations.