A NOVEL FRONT-END NOISE POWER AND SNR ESTIMATION USING WAVELET-PACKETS IN OFDM SYSTEMS Topics: Adaptive Modulation and Coding for Wireless Channels; Channel Coding, Modulation and Multi-User Detection; Detection, Decoding and Diversity Techniques; Wireless Propagation Channel Analysis and Modeling In Proceedings of the International Conference on Wireless Information Networks and Systems - Volume 0ICETE, 140-144, 2008 , Porto, Portugal