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In order to satisfy compatibility between multi-band orthogonal frequency division multiplexing (MB-OFDM) Ultra-Wideband cognitive radio systems and narrowband system, polynomial interference cancellation coding (PCC) is introduced. Simulation indicates that based on this method, the side-lobe signal of MB-OFDM decreases quickly, and then the frequency notch is deep enough. In addition, relationship...
This paper proposes a low complex frequency domain channel estimation for ultra-wideband indoor environment. The channel parameters are the attenuations and delays incurred by the signal echoes along the propagation paths. Time-hopping (TH) modulation with binary symbols is assumed. Codewords span a transmission frame. Frames are separated by a guard time to cope with the channel time dispersion....
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