In this paper an interference mitigation algorithm for coexistence of Multiband OFDM ultra wideband systems with other wireless systems is proposed. Since in the previous active interference cancellation methods, the channel effect has not been investigated, this paper focuses on proposing an enhanced spectrum shaping algorithm with aims to generate sufficiently deep spectral notch considering the effect of multipath channel. Moreover, the proposed technique is outfitted with a capability of controlling the depth and width of the created notch. The simulation results show that a notch depth of -85 dB is achievable. Furthermore, it is shown that the proposed method yields significant gains in the performance of the primary user.
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