In order to distinguish and validate the characteristic of original seismic profile or interface of lithology, an improved Hilbert-Huang algorithm is presented in this letter; it decomposes the signal into a finite set of empirical mode component, and then Hilbert spectrum analyses for decomposed component. We use GPU for the parallel processing of massive seismic data, it greatly improved the processing speed. In this letter, we test our method by four sets of seismic data, the experiment results show GPUbased method is about 4 times faster than CPU-based method.
A new scheme to generate multiple weights used in opportunistic beamforming (OBF) system is proposed to deal with the performance degradation due to the fewer active users in the OBF system. In the proposed scheme, only two mini-slots are employed to create effective channels, while more channel candidates can be obtained via linearly combining the two effective channels obtained during the two mini-slots, thus increas-ing the multiuser diversity and the system throughputs. The simulation results verify the effectiveness of the proposed scheme
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