Abstract: A method and apparatus for producing timing signals for an ultra wideband pulse generator are provided. The apparatus comprises a frequency multiplier for generating a converted signal having a multiple of a pulse frequency of a reference clock signal inputted into the frequency multipliers. Furthermore, the apparatus comprises a feedback controlled delay circuitry connected to the frequency multipliers, for generating at least two versions of the converted signal, the at least two versions having a predefined delay with respect to each other, the two versions being used as timing signals for an ultra wideband pulse generator.

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

Abstract: A method and apparatus for producing timing signals for an ultra wideband pulse generator are provided. The apparatus comprises a frequency multiplier for generating a converted signal having a multiple of a pulse frequency of a reference clock signal inputted into the frequency multipliers. Furthermore, the apparatus comprises a feedback controlled delay circuitry connected to the frequency multipliers, for generating at least two versions of the converted signal, the at least two versions having a predefined delay with respect to each other, the two versions being used as timing signals for an ultra wideband pulse generator.

Abstract: The invention relates to a method of receiving a time modulated signal in a communication system. The method comprises steps of receiving the signal non-coherently, integrating the received signal by at least two integrators, the at least two integrators being delayed in time with respect to each other, comparing energies received by the at least two integrators and determining synchronization with the signal based on comparison of output values of the at least two integrators.