Abstract: A positioning receiver includes a processor configured to process a GNSS satellite transmitted navigation message received from at least one respective satellite vehicle to provide a navigation message data packet and to determine for each data bit of the navigation message data packet a respective confidence value; and to determine positioning data based on the data bits of the navigation message data packet and respective confidence values.

Abstract: It is proposed a determination device, a method for determining navigation information and a navigation device comprising: a receiving circuit configured to receive a first signal from a first navigation satellite, the first signal comprising a first timestamp; a determination circuit configured to determine a velocity of the first navigation satellite at the first timestamp in a second coordinate system based on ephemeris data of the first navigation satellite, the second coordinate system being tilted in relation to the equatorial plane; the determination circuit further configured to determine a velocity of the first navigation satellite in a first coordinate system that is earth fixed and rotating with earth, by applying a transformation matrix to the determined velocity of the first navigation satellite in the second coordinate system and adding a correction term based on a time derivative of the transformation matrix; a navigation circuit configured to determine navigation information of the receiving c

Abstract: It is proposed a determination device, a method for determining navigation information and a navigation device comprising: a receiving circuit configured to receive a first signal from a first navigation satellite, the first signal comprising a first timestamp; a determination circuit configured to determine a velocity of the first navigation satellite at the first timestamp in a second coordinate system based on ephemeris data of the first navigation satellite, the second coordinate system being tilted in relation to the equatorial plane; the determination circuit further configured to determine a velocity of the first navigation satellite in a first coordinate system that is earth fixed and rotating with earth, by applying a transformation matrix to the determined velocity of the first navigation satellite in the second coordinate system and adding a correction term based on a time derivative of the transformation matrix; a navigation circuit configured to determine navigation information of the receiving c

Abstract: A positioning system operates by first determining that a user is pedestrian, and then estimating a speed of the user. Having tracked a first signal from one radio transmitter whose position is known, the system attempts to detect additional signals from the one transmitter, in a search space such that the first signal and the or each additional signal are consistent with the estimated speed of the user and with one or more of the signals having been reflected off a reflector in the vicinity of the user. One or more detected additional signals from the one transmitter are then tracked, and candidate measurements, derived from the first signal and the one or more detected additional signals, are provided for use when estimating the position and/or velocity of the user.

Abstract: A positioning system operates by first determining that a user is pedestrian, and then estimating a speed of the user. Having tracked a first signal from one radio transmitter whose position is known, the system attempts to detect additional signals from the one transmitter, in a search space such that the first signal and the or each additional signal are consistent with the estimated speed of the user and with one or more of the signals having been reflected off a reflector in the vicinity of the user. One or more detected additional signals from the one transmitter are then tracked, and candidate measurements, derived from the first signal and the one or more detected additional signals, are provided for use when estimating the position and/or velocity of the user.

Abstract: A positioning system obtains an estimate of the heading of a body whose position or velocity is to be estimated, for example from a heading sensor such as a gyroscope or accelerometer. Respective signals are tracked from a plurality of transmitters, and a respective Doppler measurement is obtained from each of said tracked signals. For each of the tracked signals, a speed of the body is estimated using the estimate of the heading of the body and the respective Doppler measurement. It is then determined whether the estimated speed of the body is consistent with the signal having been received along a direct path from the transmitter. Signals that provide information about the speed of the body that is inconsistent with the signal having been received along a direct path from the transmitter are then disregarded when estimating the position or velocity of the body.

Abstract: A position determining system takes the form of a cellular radio system including at least one base station having a base station satellite receiver (6) and a mobile unit including a cellular mobile station (50) coupled to a local satellite receiver (58). The base station transmits base station satellite data via a cellular radio link to the mobile unit, the data including data representing a carrier phase measurement derived from a satellite signal (70) received by the base station satellite receiver (6). The mobile unit determines its position relative to the base station using local satellite data received by the local satellite receiver (58) and corrects errors in this position determination using base station satellite data. The relative positions of the base stations are determined automatically with reference to an external positional reference which may be a satellite-based position determining system.