Generation and use of geographic databases of frequency spectral information within an operating frequency band. Described herein are methods of making databases of geospectral information and using these databases to optimize performance of wireless networks. For example, a network of wireless radio devices that monitor the frequency spectrum of the operating frequency band may provide this geographically marked information to a central database to create a database of geospectral frequency information. This geospectral frequency information may be used to characterize, optimize or modify a network of wireless radio device, or to modify an individual wireless radio device.

A method, a computer program, and a device for reducing interference of temporary communication resources used for a wireless communication between a transportation vehicle key and a transportation vehicle. The method includes determining whether interference of the temporary communication resources is present and switching off the device causing the interference or adjusting the use of the temporary communication resources for the wireless communication between the transportation vehicle key and the transportation vehicle in response to interference being present.

Wide band adaptive beam forming methods and systems are provided. The beam forming methods can include receiving signals at multiple antenna elements and digitizing samples of the received signals for some period of time. The samples are divided into sub-channels according to frequency, and interferers are identified as signals appearing across at least some minimum number of the sub-channels. After removing signals not identified as interferers from the collected signal information, that information is used to calculate weights for forming a beam having a null at the identified location of the interferer. The beam forming systems include multiple element antennas having arms in the form of a spiral, and processing hardware for performing adaptive beam forming.

A passive device shield 2 used to protect a passive chip containing data embedded in a device from remote skimming at a frequency which activates the chip to send the data, the shield 2 being removable to enable authorized reading of the chip data. The shield 2 is adapted to block the frequencies which activate the chip, the shield 2 further having a transmitter 18 which sends a coupling signal at a non-blocked frequency to a receiver 20, at least one of the receiver/and transmitter 18 having means to monitor the distance between the transmitter 18 and receiver 20 and an alert means to indicate when a predetermined distance has been exceeded.

A low-power scouting receiver is presented that provides an ability perform low-power scouting functions at a relatively low power. The low-power scouting functions determine context information for the receiver and enable fine-tuning of other receiver operations based on the context information. The low-power scouting functions include receiver control and switching, jammer detection, self-interference detection, or other context-dependent radio parameters.

A method for mitigating the effect of a localized jamming attack on a secure, tactical wireless network implements a dynamic relay assignment (DRA) approach, whereby nodes are dynamically assigned to relay communications to disadvantaged nodes that are subject to the attack, the relay nodes being selected based on their communication reliability and their proximity to the disadvantaged nodes. In embodiments, the nodes share with each other performance statistics and, in embodiments, measured local noise levels. In various embodiments, each node provides data to a strategy optimizer which then dynamically makes relay assignments. In Link-16 embodiments support for a DRA relay mode is added, and the communication protocol is extended to support the required exchange of communication quality and local noise information via PPLI messages.

A spectrum sharing system includes an advanced beacon (e.g. a low latency RF link) as part of an information sharing subsystem. The advanced beacon signal carries radar spectrum transmission schedule in an obfuscated way such as not to reveal the geolocation of the radar. The information sharing subsystem directs nodes, such as cell phones, to share spectrum based on spectrum sharing instructions contained in the advanced beacon. The spectrum sharing system permits out-of-band sharing of spectrum white space, as well as sharing of in-band spectrum gray space.

Frequency management methods and communication networks utilizing such frequency management methods are disclosed. More specifically, multiple frequency sets may be utilized to facilitate frequency hopping and a frequency management method may implement various switching schemes to switch between the different frequency sets. Techniques such as synchronization and spectrum harvesting may also be provided to support utilization of multiple frequency sets, all of which may provide improved operation reliabilities and better handling of jamming signals.

Embodiments of the disclosure relate to a fifth generation (5G) or pre-5G communication system for supporting a higher data transmission rate beyond the fourth generation (4G) communication system, such as long term evolution (LTE) are provided. The method for managing a channel in a wireless local area network (WLAN) system includes detecting a radar signal and determining an optimal channel based on history information of a channel and the detected radar signal.

A method for mitigating the effect of a localized jamming attack on a secure, tactical wireless network implements a dynamic relay assignment (DRA) approach, whereby nodes are dynamically assigned to relay communications to disadvantaged nodes that are subject to the attack, the relay nodes being selected based on their communication reliability and their proximity to the disadvantaged nodes. In embodiments, the nodes share with each other performance statistics and, in embodiments, measured local noise levels. In various embodiments, each node provides data to a strategy optimizer which then dynamically makes relay assignments. In Link-16 embodiments support for a DRA relay mode is added, and the communication protocol is extended to support the required exchange of communication quality and local noise information via PPLI messages.