Abstract: This disclosure relates to protecting an input dataset against linking with further datasets. A processor of a computer system calculates multiple values of one or more parameters of a perturbation function, the perturbation function being configured to perturb the input dataset to protect the input dataset against linking with further datasets, each of the multiple values of the one or more parameters of the perturbation function indicating a level of protection against linking with further datasets. The processor then generates multiple derived datasets from the input dataset and calculates, for each of the multiple derived datasets, a utility score that is indicative of a utility of the derived dataset for a desired data analysis. The processor then outputs one of the multiple derived datasets that has the highest utility score.

Abstract: The present invention relates to positioning of a mobile signal transmitter (MT), wherein a respective distance (DMT-100a-DMT-100d) between the transmitter (MT) and each of a plurality of sensors (100a-100d) is determined based on a direct sequence spread spectrum signal (SMT). A transmitter delay of the signal (SMT) is estimated with high accuracy by, in each sensor (100a-100d), cross-correlating an over-sampled representation of the signal (SMT) with an appropriate local spreading sequence (SPP), which contains poly-phased symbol values being different from a set of symbols in the direct sequence used to spread the transmitted signal (SMT). The local spreading sequence (SPP) has a nominal chip period, which is equivalent to the chip period of the over-sampled representation of the signal (SMT).