A navigation processing system includes at least one processor configured to execute operational instructions that cause the at least one processor to perform operations that include generating navigation data. A data stream is generated based on the navigation data and a data channel spreading sequence. A pilot stream is generated based on a pilot channel spreading sequence. A navigation signal is generated based on applying a bandwidth-efficient modulation scheme to the data stream and the pilot stream. The navigation is signal is broadcast via a navigation signal transmitter for receipt by at least one client device.

One or more computing devices, systems, and/or methods for detecting spoofing attacks are provided. Location information of a base station may be evaluated to determine a true position of the base station. Satellite signals received by the base station may be processed and evaluated to calculate a real time position of the base station. A distance between the real time position and the true position may be calculated. In response to the distance exceeding a threshold distance, an alert is generated to indicate that the base station is experiencing a spoofing attack.

A method, system and apparatus are disclosed. In one or more embodiments, a network node for communicating with a wireless device is provided. The network node includes processing circuitry configured to receive measurement capability information of a wireless device where the measurement capability information indicates an ability to perform a global navigation satellite system, GNSS, measurement. The processing circuitry is further configured to determine a GNSS measurement gap configuration during which the wireless device is to perform at least one GNSS measurement during at least one GNSS measurement gap where the GNSS measurement gap configuration is based at least in part on the received measurement capability information, and indicate the GNSS measurement gap configuration to the wireless device.

In an embodiment, a method monitors, within a global navigation satellite system (GNSS) limited zone, an intra-zone location of a vehicle having a GNSS receiver, the intra-zone location being within the limited zone. The method determines a simulated intra-zone location of the vehicle based on the intra-zone location monitored to calculate a likely location of the vehicle. The method calculates a global location of the vehicle based on the intra-zone location and the location of the GNSS limited zone within a global network of limited zones. The method broadcasts, from a transmitter within the GNSS limited zone, a GNSS signal representing the global location of the vehicle.

In an embodiment, a method monitors, within a global navigation satellite system (GNSS) limited zone, an intra-zone location of a vehicle having a GNSS receiver, the intra-zone location being within the limited zone. The method determines a simulated intra-zone location of the vehicle based on the intra-zone location monitored to calculate a likely location of the vehicle. The method calculates a global location of the vehicle based on the intra-zone location and the location of the GNSS limited zone within a global network of limited zones. The method broadcasts, from a transmitter within the GNSS limited zone, a GNSS signal representing the global location of the vehicle.

Disclosed are techniques for navigating a mobile machine, such as an autonomous robot, in an environment that includes objects that may block, reflect, or distort satellite signals to be used for positioning. Satellite data may be captured from one or more satellites. An image may be captured using an imaging device that is at least partially oriented toward the one or more satellites. A set of sky scores may be calculated for a set of ground positions surrounding the mobile machine based on the satellite data and the image. Each of the set of sky scores may be indicative of an accuracy of a satellite-based position at one of the set of ground positions. The mobile machine's navigation may be modified using the set of sky scores.

The present disclosure provides a radio frequency detecting device, a detecting method, and a microwave oven, and the radio frequency detecting device comprises: a signal transmitting device configured to generate and transmit multiple forward frequency detecting signals of different frequencies; a signal receiver configured to receive multiple reverse frequency detecting signals reflected by the load; a first detection device configured to detect each first parameter corresponding to each of the forward frequency detecting signals; a second detection device configured to detect each second parameter of each of the reverse frequency detecting signals; and a microcontroller configured to determine a state parameter of the load based on the multiple frequencies and the first parameter and the second parameter corresponding to each of the frequencies.

The present disclosure provides a radio frequency detecting device, a detecting method, and a microwave oven, and the radio frequency detecting device comprises: a signal transmitting device configured to generate and transmit multiple forward frequency detecting signals of different frequencies; a signal receiver configured to receive multiple reverse frequency detecting signals reflected by the load; a first detection device configured to detect each first parameter corresponding to each of the forward frequency detecting signals; a second detection device configured to detect each second parameter of each of the reverse frequency detecting signals; and a microcontroller configured to determine a state parameter of the load based on the multiple frequencies and the first parameter and the second parameter corresponding to each of the frequencies.

A receiver authenticates a wideband (WB) signal from global navigation satellites (GNSS) using a narrowband (NB) signal that is also transmitted from the satellites. The NB signal includes segments that are transmitted in time and frequency slots of successive transmission frames. The NB signal is less susceptible to a smart WB jammer. Also, the NB signal segments may also be transmitted at a relative power level with respect to the WB signal, where the relative power level may vary in a known pattern so as to distinguish the WB signal of the satellite from a stronger WB signal from a smart jammer.

A receiver authenticates a wideband (WB) signal from global navigation satellites (GNSS) using a narrowband (NB) signal that is also transmitted from the satellites. The NB signal includes segments that are transmitted in time and frequency slots of successive transmission frames. The NB signal is less susceptible to a smart WB jammer. Also, the NB signal segments may also be transmitted at a relative power level with respect to the WB signal, where the relative power level may vary in a known pattern so as to distinguish the WB signal of the satellite from a stronger WB signal from a smart jammer.