The European Space Agency has patented a GNSS receiver that utilizes multiple antennas and channels to receive satellite signals. It calculates cross-correlation functions to jointly estimate the receiver clock’s bias and a composite channel, enhancing navigation accuracy by referencing the GNSS’s maintained time. GlobalData’s report on European Space Agency gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on European Space Agency, Beamforming networks was a key innovation area identified from patents. European Space Agency's grant share as of June 2024 was 70%. Grant share is based on the ratio of number of grants to total number of patents.
Receiver for estimating clock bias in gnss systems
The patent US11994598B2 describes a receiver designed for use with a Global Navigation Satellite System (GNSS) that incorporates multiple satellites transmitting navigation signals. Each signal contains a spreading code and is synchronized with a time reference maintained by the GNSS. The receiver features a clock, at least one antenna for receiving signals across multiple channels, and a correlator for calculating cross-correlation functions between the received signals and reference navigation signals. This configuration allows the receiver to jointly estimate the clock bias relative to the GNSS time reference and to analyze a composite channel that reflects the combined contributions of the multiple channels over time.
The claims further detail the receiver's capabilities, including the detection of specific navigation signals, determination of code-phase alignment, and the handling of non-line-of-sight components. The receiver can estimate an approximate clock bias with high accuracy, utilizing calculated cross-correlation functions to optimize the joint estimation process. Additionally, the receiver can incorporate multiple antennas to leverage spatial correlation and employs probability distribution functions to refine its estimates based on previous signal data. The method outlined for operating the receiver emphasizes the calculation of cross-correlation functions and the joint estimation of clock bias and composite channel contributions, making it suitable for various environments, including indoor settings.
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