Abstract: A network of transmission reception devices can be used for an indoor location system covering an indoor environment. The network includes a power supply system and a number of transmission reception devices. The power supply system includes a power cable with a power line and a power source configured to supply a voltage to the power line of the power cable. The power cable is arranged in the indoor environment. The transmission reception devices each include a transmission reception unit configured to operate as a stationary unit of the indoor location system and a power receiving unit including a connector configured to mechanically connect the transmission reception device to the power cable and to electrically connect the transmission reception unit to the power line for powering the transmission reception unit. Each transmission reception device is connected to the power cable at a respective stationary position.

Abstract: A method includes sending, by a master beacon device and one or more beacon repeater devices, ultra-wideband (UWB) beacon frames. The UWB beacon frames are transmitted as interleaved pairs of UWB beacon frames. Each interleaved pair includes a first UWB beacon frame and a second UWB beacon frame. For each interleaved pair, the first UWB beacon frame and the second UWB beacon frame are transmitted with a master time delay. The method further includes receiving, by one or more tag devices, at least one of the interleaved pairs of UWB beacon frames.

Abstract: A location system includes transmission reception devices. A first transmission reception device is configured to operate as a stationary unit of the location system for localizing tag devices by exchanging ultra-wideband signals. The tag devices is localizable within a localizing space that extends along a high-resolution line associated with the first transmission reception device. The system also includes a movable unit and first and second tag devices that are positioned at the movable unit and are separated from each other by a tag separation distance. A control system is configured to perform an ultra-wideband signal analysis to determine the distance from a selected tag device to the first transmission reception device and to derive an orientation of the movable unit with respect to the high-resolution line from distances determined for the first tag device and the second tag device.

Abstract: In an embodiment an ultra-wideband indoor real-time location system for determining positions of mobile tag devices within a localizing area includes a plurality of UWB signal transmitters located at preset positions and defining the localizing area, wherein the UWB signal transmitters are configured to operate with synchronized clocks and transmit UWB signals based on a UWB frame format, and wherein the UWB frame format includes unique information content for the UWB signal transmitter and at least one mobile tag device comprising a signal reception unit configured to receive the UWB signals, a time detection unit configured to derive respective arrival time points for the received UWB signals, an identification unit configured to derive the unique information content from the received UWB signals and a control unit configured to process the unique information content and the arrival time points for at least a subset of the UWB signal transmitters in a localizing algorithm to derive a position of the mobile

Abstract: In an embodiment a real-time location method includes sending, by a master beacon device and one or more beacon repeater devices, ultra-wideband beacon frames, wherein the ultra-wideband beacon frames are transmitted as interleaved pairs of ultra-wideband beacon frames, wherein each interleaved pair is sent either from the master beacon device or the one or more beacon repeater devices, wherein each interleaved pair includes a first ultra-wideband beacon frame and a second ultra-wideband beacon frame, and wherein, for each interleaved pair, the first ultra-wideband beacon frame and the second ultra-wideband beacon frame are transmitted with a master time delay, receiving, by one or more tag devices, at least one of the interleaved pairs of ultra-wideband beacon frames, receiving, by the one or more beacon repeater devices, at least one of the interleaved pairs of ultra-wideband beacon frames, receiving, by one of a plurality of tag response receptor units, at least one of the interleaved pairs of ultra-wideba

Abstract: An embodiment method is disclosed for deriving an estimation value of a clock-error for a slave clock, wherein the slave clock is set at a nominal slave period and outputs a sequence of slave clock signals at an actual slave period, and wherein a difference between the actual slave period and the nominal slave period is approximated by the estimation value of the clock-error.

Abstract: An embodiment method is disclosed for deriving an estimation value of a clock-error for a slave clock, wherein the slave clock is set at a nominal slave period and outputs a sequence of slave clock signals at an actual slave period, and wherein a difference between the actual slave period and the nominal slave period is approximated by the estimation value of the clock-error.

Abstract: A method for determining arrival time of a UWB pulse at a receiver. When a pulse is modulated at an RF frequency, the receiver includes a quadrature demodulator, a first correlating stage for correlating the in-phase signal with the first and second signals of an orthogonal base on a time window and a second correlating stage for correlating the quadrature signal with the first and second signals of the orthogonal base on the same window, a phase estimator estimating the phase of the signal received in the orthogonal base from the correlation results of the first and/or second correlating stage(s), and a computing device determining the arrival time from the phase thus estimated.

Abstract: A pulsed multi-channel UWB receiver. The receiver includes a first stage translating a received signal into baseband or at an intermediate frequency, a second stage carrying out quadrature mixing on the in-phase and quadrature channels of the first stage, a third stage carrying out an integration on a time window of the signals from the second stage, and a fourth stage carrying out a combination of the integration results from the third stage to provide the real part and the imaginary part of the modulation symbol. The receiver is configurable according to the receiving channel and processing type selected.

Abstract: A UWB receiver with time drift correction. After a frequency translation by a quadrature demodulator, a pulsed UWB signal received is integrated on successive time windows, and then sampled. A phase shift estimator determines a phase difference between samples separated by a multiple of the sampling period approaching the period of the pulses of the signal. A controller deduces from this phase difference a time offset to be applied to integrators to synchronize the receiver on the signal received.

Abstract: A UWB receiver with time drift correction. After a frequency translation by a quadrature demodulator, a pulsed UWB signal received is integrated on successive time windows, and then sampled. A phase shift estimator determines a phase difference between samples separated by a multiple of the sampling period approaching the period of the pulses of the signal. A controller deduces from this phase difference a time offset to be applied to integrators to synchronize the receiver on the signal received.

Abstract: A method for determining arrival time of a UWB pulse at a receiver. When a pulse is modulated at an RF frequency, the receiver includes a quadrature demodulator, a first correlating stage for correlating the in-phase signal with the first and second signals of an orthogonal base on a time window and a second correlating stage for correlating the quadrature signal with the first and second signals of the orthogonal base on the same window, a phase estimator estimating the phase of the signal received in the orthogonal base from the correlation results of the first and/or second correlating stage(s), and a computing device determining the arrival time from the phase thus estimated.

Abstract: A pulsed multi-channel UWB receiver. The receiver includes a first stage translating a received signal into baseband or at an intermediate frequency, a second stage carrying out quadrature mixing on the in-phase and quadrature channels of the first stage, a third stage carrying out an integration on a time window of the signals from the second stage, and a fourth stage carrying out a combination of the integration results from the third stage to provide the real part and the imaginary part of the modulation symbol. The receiver is configurable according to the receiving channel and processing type selected.