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A new simulation model based on Ricepsilas sum of sinusoids is proposed for frequency hopping wideband Rayleigh fading channels. It is shown that a frequency hop in the physical channel model corresponds to phase hops in the simulation model, while maintaining all other parameters unchanged. Due to the fact that closed-form expressions are given for all simulation parameters, so the correlation properties...
The estimation range and estimation accuracy are contradictory in conventional correlation based frequency estimators due to phase ambiguity. A novel frequency estimator is proposed to unwrap the correlation phase sequence through a differential-modulus-accumulation process. By utilizing the whole unwrapped phase sequence, the proposed estimator is able to achieve maximal estimation range with CRB...
GPS has been broadly applied in every fields of our social life, since the environment around us has been becoming more and more complicated, satellite navigation positioning technology with low SNR gains more and more attention. However, the current GPS signal structure and signal power levels are barely sufficient for indoor applications. Errors due to multi-path and noise associated with weak indoor...
The flow velocity of liquid metal coolant can be determined through the measurements of temperature fluctuation recorded by a pair of temperature sensors placed certain distance apart along the flow. Traditionally, this was done using a cross-correlation algorithm to estimate the transit time of the coolant, and thus its velocity. This widely used cross-correlation algorithm, however, suffers from...
In this paper, we propose an automatic pair-matching method for two-dimensional (2-D) angle estimation. Unlike some classical pair-matching methods requiring a complex process, this method utilizes the corresponding combinations of the elevation and azimuth angles emerging in the cross-correlation matrix of two uniform linear arrays (ULAs) to achieve automatic pairing. Computer simulations are used...
In parallel time-interleaved data acquisition systems, timing mismatch degrades the performance of the whole system. Some initial algorithms for time delay estimation (TDE) were designed under the consideration that only timing mismatch affected at that time. In practical, this is hardly assured. Therefore a new time delay estimation algorithm is proposed in this paper, by the means of signal cross-correlation,...
Association rules mining plays an important part in the alarm correlation analysis in the telecommunication networks. A novel algorithm based on time window pre-processing and the weighted frequent pattern tree method was proposed in this paper. It is an efficient algorithm which can avoid scanning the database many times and producing a large number of conditional pattern trees. Experiments on a...
This paper investigates power dissipation by studying stochastic characteristics of signals in the circuit. Not only the correlation of transition probability is considered but also the correlation of the inputs is factored in the analysis. We simulate the inputs by using random sequences following specified stochastic characteristics. The results show that stochastic parameters impact switch activity,...
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