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We investigate the localization of multiple signal sources based on sensors performing time-of-arrival (TOA) measurement in wireless sensor networks. Moving beyond the widely studied single source localization problem, concurrently active multiple sources substantially complicate the problem since anchored sensor nodes are unaware of associations between(More)
We study the performance of secure communications over correlated fading channels in the presence of an eavesdropper, where the main and eavesdropper channels are correlated. We derive exact expressions for both the average secrecy capacity and the outage probability in the form of infinite series. Moreover, the truncated error of the infinite series(More)
In this paper, we present an adaptive receiver for multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) systems. The adaptive algorithm switches between the maximum likelihood detection (MLD) and the minimum mean square error (MMSE) detection according to the channel condition. By exploiting the correlation in both time and(More)
The protograph LDPC (P-LDPC) coded modulation is an efficient scheme using the variable degree matched mapping (VDMM) based on the protograph structure. We propose a VDMM optimization strategy, as a crucial part for the P-LDPC coded modulation, by checking different permutation patterns between the variable nodes in protograph and the modulated bits. Then,(More)