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Spectrum sensing is regarded as a key technology in cognitive radio (CR). Energy detector has been performed as an alternative spectrum sensing method because of its low computational complexity and not requiring a priori information of the primary signal. This study proposes an enhanced energy detector by making an arbitrary positive power operation of the received signal amplitude instead of the...
This study presents a partial-parallel decoder architecture for ??-rotation low-density parity-check (LDPC) codes, which have regular rotation structure and linear time encoding architecture. One improved construction method, which deletes one parity-check bit corresponding to the actually redundant weight-1 column, is proposed, and then an effective encoding algorithm, which utilises only the index...
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