Abstract: A beam delivery system is provided that includes a beam delivery photonic integrated circuit. The beam delivery photonic integrated circuit includes one or more optical inputs; a plurality of waveguide outputs; and a plurality of beam paths. Each beam path connects one of the plurality of waveguide outputs to at least one of the optical inputs. The plurality of waveguide outputs are configured to emit a plurality of parallel beams. The beam delivery photonic integrated circuit is on a chip. The beam delivery system further includes a telecentric optical relay assembly. The telecentric optical relay assembly is configured to receive the plurality of parallel beams provided by the waveguide outputs and focus each received beam on a corresponding one of a plurality of positions of an atomic object confinement apparatus in a telecentric manner.

Abstract: A method of acquiring a received spread spectrum signal comprises receiving a spread spectrum signal, analyzing the received signal to detect interference within the received signal, and adapting the baseband processing of the received signal to reduce power consumption during periods of detected interference. This allows the GPS processing resources to be focussed on areas of signal where there is little or no interference, and this is possible without modification to the source of interference. The interference is detected from an analysis of the received signal, and in particular before the baseband digital signal processing.

Abstract: A GPS RF front-end is disclosed comprising an antenna for receiving GPS signals, an analog to digital converter for sampling received GPS signals and interface circuitry for outputting the GPS signal samples. The GPS RF front-end is configured to vary the sample resolution of GPS signal samples outputted. Also disclosed is a corresponding method of providing a position fix, storage medium and apparatus for the same.

Abstract: A method of determining a GPS position fix. The method includes: (i) sampling received GPS signals and storing those samples; (ii) conducting preliminary processing of those GPS signal samples to determine the likelihood of being able to obtain a position fix during later, final processing of those GPS signal samples; and (iii) after step (ii), conducting final processing of those GPS signal samples to obtain a position fix.

Abstract: A method of acquiring a received spread spectrum signal comprises receiving a spread spectrum signal, analysing the received signal to detect interference within the received signal, and adapting the baseband processing of the received signal to reduce power consumption during periods of detected interference. This allows the GPS processing resources to be focussed on areas of signal where there is little or no interference, and this is possible without modification to the source of interference. The interference is detected from an analysis of the received signal, and in particular before the baseband digital signal processing.

Abstract: A GPS RF front-end is disclosed comprising an antenna for receiving GPS signals, an analog to digital converter for sampling received GPS signals and interface circuitry for outputting the GPS signal samples. The GPS RF front-end is configured to vary the sample resolution of GPS signal samples outputted. Also disclosed is a corresponding method of providing a position fix, storage medium and apparatus for the same.

Abstract: A method of determining a GPS position fix comprising the steps of: (i) sampling received GPS signals and storing those samples; (ii) conducting preliminary processing of those GPS signal samples to determine the likelihood of being able to obtain a position fix during later, final processing of those GPS signal samples; and (iii) after step (ii), conducting final processing of those GPS signal samples to obtain a position fix.

Abstract: A time shifted replica signal (SLS) is generated from a reference signal (SPS) including a series of samples (A to K) describing bits of a data message, the sampling rate being at least twice the data message bit rate. The phases of the reference signal samples are determined with respect to virtual epochs (41) of the data message bits of the reference signal (SPS). The time shifted replica signal (SLS) is composed from the reference signal samples as a function of the phases of the reference signal samples. In another embodiment, the time shifted replica signal (SLS) is composed from the reference signal samples (A to K), the sampling rate of the replica signal (SLS) being the same as that of the reference signal (SPS), at least one reference signal sample (A to K) not being present in the time shifted replica signal (SLS).

Abstract: The present invention provides for spread spectrum receiver (1) and related method arranged for the receipt and processing of a spread spectrum signal wherein a PRN code is generated locally as an intended replica of a received signal code and a correlation threshold test is conducted on the received signal to determine the state of suspected code acquisition. The baseband signal derived from the received signal is processed by the microprocessor (14) but the correlation threshold test is conducted remote from the microprocessor (14) and a received signal is then flagged for subsequent processing by the microprocessor (14) if the threshold value according to the correlation threshold test is exceeded.

Abstract: A method of generating a time shifted replica signal (SLS) from a reference signal (SPS) comprising a series of samples (A to K) describing bits of a data message in which the sampling rate is at least twice the data message bit rate is disclosed. The method comprising the steps of determining the phases of the reference signal samples with respect to virtual epochs (41) of the data message bits of the reference signal (SPS); and composing the time shifted replica signal (SLS) from the reference signal samples as a function of the phases of the reference signal samples.