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In applications with strict requirements regarding reliability and real time capability such as factory and process automation, it is critical to detect sources of interference that might corrupt data packets leading to retransmissions and delays. To tackle this issue we propose a method for measuring and quantifying radio interference using higher-order statistics. Unlike traditional energy detectors...
Maximum likelihood (ML) based modulation detector provides the optimal performance in the sense that the detection error probability is minimized, if no prior probability of candidate modulations is available at the modulation detector. However, the evaluation of the likelihood function requires prohibitively high computational complexity. This contribution deals with an approximation of the ML detector,...
Maximum likelihood (ML) based modulation detector is optimal in the sense that the detection error probability is minimized if no prior probability of candidate modulations is available at the detector. However, the high computational complexity of the ML-based detector strongly limits its practical implementation. This contribution deals with a computational-efficient approximation of the ML-based...
In this paper, a novel technique is proposed to address the joint sampling timing acquisition for baseband and broadband power-line communication (BB-PLC) systems using Orthogonal-Frequency-Division-Multiplexing (OFDM), including the sampling phase offset (SPO) and the sampling clock offset (SCO). Under pairwise correlation and joint Gaussian assumption of received signals in frequency domain, an...
In this paper, an improved algorithm of coarse synchronization in the downlink of 3GPP LTE system is presented. This new algorithm can reduce the MSE (mean square error) of detected fractional carrier frequency offset (FCFO) by an order of magnitude and improve the accuracy rate of start point estimation by near 80 percent when SNR equals 0 in contrast with conventional coarse synchronization algorithms,...
Based on the theory of stochastic resonance, a new method was presented to enhance signal-to-noise ratio (SNR) of HPLC/MS signal for trace analysis with a new optimization method of the system parameters. The method was applied to experimental weak signals of HPLC/MS, which was embedded in the noise background and the SNR was enhanced greatly. The LOD and LOQ were improved from 10 ng/ml and 25 ng/ml...
A 2304-bit flexible decoder for low-density parity-check (LDPC) codes is presented for Wireless-MAN applications. Based on modified turbo-decoding message-passing (M-TDMP) algorithm, the decoder achieves low complexity as well as fast convergence which produces high throughput of 138 Mbps working at 50 MHz. By adopting a novel scheme for early termination of iteration, the proposed decoder obtains...
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