Abstract: A method for detecting a probe signal at an estimated code delay and an estimated doppler frequency includes: (i) dividing a period of the probe signal into sections each of a predetermined duration; (ii) assigning to each section one of a multiple code categories, each code category being indicative of a signal pattern of the probe signal within the section; and (iii) selecting multiple phase categories for a sinusoidal signal, each phase category being indicative of a range of phases in the sinusoidal signal.

Abstract: A method and a decoder for receiving a message encoded in Turbo Codes and modulated for transmission as an analog signal includes: (a) demodulating the analog signal to recover the Turbo Codes; and (b) decoding the Turbo Codes to recover the message using an iterative Turbo Code decoder, wherein the decoding includes performing an error detection after a predetermined number of iterations of the Turbo Code decoder to determine whether or not an error has occurred during the transmission. The predetermined number of iterations may be, for example, two. Depending on the result of the error detection, the decoding may stop, a request for retransmission of the message may be sent, or further iterations of decoding in the Turbo Code decoder may be carried out.

Abstract: A flexible processor includes (i) numerous configurable processors interconnected by modular interconnection fabric circuits that are configurable to partition the configurable processors into one or more groups, for parallel execution, and to interconnect the configurable processors in any order for pipelined operations, Each configurable processor may include (i) a control circuit; (ii) numerous configurable arithmetic logic circuits; and (iii) configurable interconnection fabric circuits for interconnecting the configurable arithmetic logic circuits.

Abstract: A method for detecting a probe signal at an estimated code delay and an estimated doppler frequency includes: (i) dividing a period of the probe signal into sections each of a predetermined duration; (ii) assigning to each section one of a multiple code categories, each code category being indicative of a signal pattern of the probe signal within the section; and (iii) selecting multiple phase categories for a sinusoidal signal, each phase category being indicative of a range of phases in the sinusoidal signal.

Abstract: A flexible processor includes (i) numerous configurable processors interconnected by modular interconnection fabric circuits that are configurable to partition the configurable processors into one or more groups, for parallel execution, and to interconnect the configurable processors in any order for pipelined operations, Each configurable processor may include (i) a control circuit; (ii) numerous configurable arithmetic logic circuits; and (iii) configurable interconnection fabric circuits for interconnecting the configurable arithmetic logic circuits.

Abstract: An assisted satellite positioning system based on detecting signals from a number of satellites includes: (a) a mobile receiver; and (b) a base station communicating with the receiver over a low-power wireless communication network, the base station providing ephemeris data of a selected number of the satellites, but not all, using a compressed data format. The ephemeris data may include data concerning doppler frequency variations or elevation variations of the selected satellites over a predetermined time interval. The doppler frequency variations and the elevation variations may be represented in the compressed format by coefficients of a polynomial function of time. The polynomial function may be weighted to have lesser relative errors in larger doppler frequencies than lesser doppler frequencies, or to have lesser relative errors in lesser elevations than larger elevations. In one implementation, the low-power wireless communication network—such as a LoRa network—that has a range of at least 10 miles.

Abstract: A positioning method that into account frequently changing ionosphere delays. The method includes: (a) including, in the pseudo-range determination associated with each signal received from various signal sources, a function that represents the environmental bias by one or more parameters, in addition to parameters representing the position of the signal receiver and a clock drift of the signal receiver; and (b) jointly solving for values of the parameters of the function and the parameters representing the position of the signal receiver and the clock drift of the signal receiver. The environmental bias may be an ionosphere delay, which may be modeled by a function having parameters that relate to an Ionosphere Pierce Point (IPP) of the signal received. The function may characterize the ionosphere delay as a function of variations in longitude and latitude from the signal source.

Abstract: An assisted satellite positioning system based on detecting signals from a number of satellites includes: (a) a mobile receiver; and (b) a base station communicating with the receiver over a low-power wireless communication network, the base station providing ephemeris data of a selected number of the satellites, but not all, using a compressed data format. The ephemeris data may include data concerning doppler frequency variations or elevation variations of the selected satellites over a predetermined time interval. The doppler frequency variations and the elevation variations may be represented in the compressed format by coefficients of a polynomial function of time. The polynomial function may be weighted to have lesser relative errors in larger doppler frequencies than lesser doppler frequencies, or to have lesser relative errors in lesser elevations than larger elevations. In one implementation, the low-power wireless communication network—such as a LoRa network—that has a range of at least 10 miles.

Abstract: A method for detecting a probe signal at an estimated code delay and an estimated doppler frequency includes: (i) dividing a period of the probe signal into sections each of a predetermined duration; (ii) assigning to each section one of a multiple code categories, each code category being indicative of a signal pattern of the probe signal within the section; and (iii) selecting multiple phase categories for a sinusoidal signal, each phase category being indicative of a range of phases in the sinusoidal signal.

Abstract: An ephemeris server performs a method that includes (a) (i) obtaining broadcast ephemeris information by accessing a source of broadcast information on a wide area communication network; (ii) extracting, from broadcast ephemeris information, orbital trajectory information of each satellite, and (iii) creating and storing in a real-time database modified orbital trajectory information for each of the satellites from the extracted orbital trajectory information; (b) at each of a plurality of designated time points, updating the modified trajectory information in the real-time database, based upon evaluation of an update criterion; and (c) providing the modified trajectory information to each of a plurality of devices, each device having a GNSS receiver capable of using the modified trajectory information to process broadcast signals of the satellites.

Abstract: A low-latency, high-bandwidth, and highly scalable method delivers data from a source device to multiple communication devices on a communication network. Under this method, the communication devices (also called player nodes) provide download and upload bandwidths for each other. In this manner, the bandwidth requirement on the data source is significantly reduced. Such a data delivery network is scalable without limits with the number of player nodes. In one embodiment, a computer network includes (a) a source server that provides a data stream for delivery in the computer network, (b) player nodes that exchange data with each other to obtain a complete copy of the data stream, the network nodes being capable of dynamically joining or exiting the computer network, and (c) a control server which maintains a topology graph representing connections between the source server and the player nodes, and the connections among the player nodes themselves.

Abstract: A satellite positioning receiver includes a local oscillator, a front-end circuit with having an analog mixer, a number of signal processing channel circuits, and a processing circuit. The satellite positioning receiver performs a method that includes (i) acquiring a first satellite using a first frequency search space that spans both uncertainties due to the first satellite's orbit and uncertainties due to the clock bias or a time rate of change of the bias; and (ii) using the bias or the time derivative of the bias determined during the acquisition of the first satellite, acquiring a second satellite using a second frequency search space that spans substantially only uncertainties due to the second satellite's orbit.

Abstract: A position-determining apparatus, such as a GPS receiver, determines the position of the mobile device based on the time of flight of a transmitted probe signal using a method in which sections of the received signal is classified into two or more categories and accumulated according to categories before being used to compute the correlations familiar in the context of a matched filter. Using the method of the present invention to compute the correlations, and optionally applying additional time-saving techniques described herein, a position determination is achieved using arithmetic operations that are significantly reduced from that required in prior art methods to compute the correlations. The reduced number of arithmetic operations can reduce significantly the power consumption required of a device carrying out a method of the present invention, and thereby realizing a significant advantage.

Abstract: A system combines contributions from various sensors to obtain an object's position, velocity, or orientation.

Abstract: An assisted satellite positioning system based on detecting signals from a number of satellites includes: (a) a mobile receiver; and (b) a base station communicating with the receiver over a low-power wireless communication network, the base station providing ephemeris data of a selected number of the satellites, but not all, using a compressed data format. The ephemeris data may include data concerning doppler frequency variations or elevation variations of the selected satellites over a predetermined time interval. The doppler frequency variations and the elevation variations may be represented in the compressed format by coefficients of a polynomial function of time. The polynomial function may be weighted to have lesser relative errors in larger doppler frequencies than lesser doppler frequencies, or to have lesser relative errors in lesser elevations than larger elevations. In one implementation, the low-power wireless communication network—such as a LoRa network—that has a range of at least 10 miles.

Abstract: An assisted satellite positioning system based on detecting signals from a number of satellites includes: (a) a mobile receiver; and (b) a base station communicating with the receiver over a low-power wireless communication network, the base station providing ephemeris data of a selected number of the satellites, but not all, using a compressed data format. The ephemeris data may include data concerning doppler frequency variations or elevation variations of the selected satellites over a predetermined time interval. The doppler frequency variations and the elevation variations may be represented in the compressed format by coefficients of a polynomial function of time. The polynomial function may be weighted to have lesser relative errors in larger doppler frequencies than lesser doppler frequencies, or to have lesser relative errors in lesser elevations than larger elevations. In one implementation, the low-power wireless communication network—such as a LoRa network—that has a range of at least 10 miles.

Abstract: A low-latency, high-bandwidth, and highly scalable method delivers data from a source device to multiple communication devices on a communication network. Under this method, the communication devices (also called player nodes) provide download and upload bandwidths for each other. In this manner, the bandwidth requirement on the data source is significantly reduced. Such a data delivery network is scalable without limits with the number of player nodes. In one embodiment, a computer network includes (a) a source server that provides a data stream for delivery in the computer network, (b) player nodes that exchange data with each other to obtain a complete copy of the data stream, the network nodes being capable of dynamically joining or exiting the computer network, and (c) a control server which maintains a topology graph representing connections between the source server and the player nodes, and the connections among the player nodes themselves.

Abstract: A flexible processor includes (i) numerous configurable processors interconnected by modular interconnection fabric circuits that are configurable to partition the configurable processors into one or more groups, for parallel execution, and to interconnect the configurable processors in any order for pipelined operations, Each configurable processor may include (i) a control circuit; (ii) numerous configurable arithmetic logic circuits; and (iii) configurable interconnection fabric circuits for interconnecting the configurable arithmetic logic circuits.

Abstract: An ephemeris server performs a method that includes (a) (i) obtaining broadcast ephemeris information by accessing a source of broadcast information on a wide area communication network; (ii) extracting, from broadcast ephemeris information, orbital trajectory information of each satellite, and (iii) creating and storing in a real-time database modified orbital trajectory information for each of the satellites from the extracted orbital trajectory information; (b) at each of a plurality of designated time points, updating the modified trajectory information in the real-time database, based upon evaluation of an update criterion; and (c) providing the modified trajectory information to each of a plurality of devices, each device having a GNSS receiver capable of using the modified trajectory information to process broadcast signals of the satellites.

Abstract: A system combines contributions from various sensors to obtain an object's position, velocity, or orientation.