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1. INTRODUCTION Multicarrier modulation techniques, such as, OFDM (Orthogonal Frequency Division Modulation) and DMT (Discrete Multi-Tone), have received great attention in high-speed data communication systems [1]. In communication systems, OFDM has become popular in various standards, for example, local area network (WLAN), digital audio broadcasting(More)
The electronic structure of laser-deposited P-doped ZnO films was investigated by X-ray absorption near-edge structure spectroscopy (XANES) at the O K-, Zn K-, and Zn L3-edges. While the O K-edge XANES spectrum of the n-type P-doped ZnO demonstrates that the density of unoccupied states, primarily O 2p-P 3sp hybridized states, is significantly high, the O(More)
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