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Focusing on the problem of the poor locating performance in original DV- Hop algorithm which is one of the range-free algorithms in wireless sensor network (WSN), an intelligent DV- Hop algorithm for locating nodes was proposed in this paper. Fully considering the effect of dynamic topology, the self-adaptive artificial bee colony (SAABC) algorithm was introduced to estimate the unknown nodes location...
Due to the large number of transmissions close to the Loran-C band, synchronous interference has become a serious problem. An improved adaptive algorithm for suppressing the synchronous interference of Loran-C components is presented. The present adaptive algorithms have the disadvantages of tremendous operation and long-time orientation, thus, the paper puts forward an improved algorithm (BMMax-NLMS)...
We derive the entropy rate formula for a complex Gaussian random process by using a widely linear model. The resulting expression is general and applicable to both circular and noncircular Gaussian processes, since any second-order stationary process can be modeled as the output of a widely linear system driven by a circular white noise. Furthermore, we demonstrate application of the derived formula...
The discrete W transform (DWT), introduced by Wang Z, has been used in many applications of digital signal processing, data compression and information hiding. The unified form of discrete W transform has two parameters. There are four useful types of the discrete W transform. In simulating the discrete W transform, we propose a generalized discrete W transform with three parameters, and prove its...
A novel ESPRIT technique for estimating the delays of Loran-C skywave components is presented. This provides the basis for a new generation of receivers which may adjust its sampling points adoptively to the optimal values in a constantly-changing skywave environment. The signal model is setup using spectral-division technique for isolating groundwave and skywave components of Loran-C signal. The...
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