Several results have been reported in the literature on the performance of various diversity combining schemes for wireless communications systems. Typically for convenience it is assumed that the signal envelopes in the diversity branches are uncorrelated with one another. However, in practice the envelopes will be correlated. In this paper a procedure to generate two equal power Rayleigh fadi...

By studying cross correlations in the intensity of light scattered by a fluid sample in different directions at different times, it is possible to measure the dynamic scattering function S(k,t) for the fluid. The multiple scattering contribution to the time-dependent cross correlations is very substantially less than the multiple scattering contribution to S(k,t) as obtained by a conventional s...

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Industrial process signals do affect one other. However, causal dependencies, or correlation, and thereby consequences of control actions cannot always be understood by the operator, which may lead to accidents. Models explain dependencies and are mostly built on process knowledge and blueprints, while causalities are visible in the measurements and ought to be used to increase process understa...

Although it is well known that cross correlation can be efficiently implemented in the transform domain, the normalized form of cross correlation preferred for feature matching applications does not have a simple frequency domain expression. Normalized cross correlation has been computed in the spatial domain for this reason. This short paper shows that unnormalized cross correlation can be eff...

Approximation of acoustic Green’s functions through cross-correlation of acoustic signals in the ocean is a relatively young field that has become an area of interest over the past few years. Although the amplitudes of these estimates generally differ from those of the true Green’s Function, the estimated arrival structure can be highly accurate. Interhydrophone travel times extracted from thes...

This paper analyses the effects of random noise in determining errors and confidence levels for galaxy redshifts obtained by cross-correlation techniques. The main finding is that confidence levels have previously been overestimated, and errors inaccurately calculated in certain applications. New formulae are presented.

Herein, the interand intra-site correlation properties of shadow fading and power-weighted angular spread at both the mobile station and the base station are studied utilizing narrow band multi-site MIMO measurements in the 1800MHz band. The influence of the distance between two base stations on the correlation is studied in an urban environment. Measurements have been conducted for two differe...

In the vehicle communication system, transferred information is needed to be detected as possible as fast in order to avoid car accident and inform the road traffic fast. Fast communication defines that timing synchronization is detected fast. In this paper, we present combination method which can determine synchronization timing of frame is executed by auto-correlation and cross correlation si...