A hopping spread-spectrum wireless network for IoT applications. The network includes mobile devices with unsynchronized local clocks that transmit including, in a preamble portion, a plurality of sync words, each combined with at least one instance of a sequential index. The hopping frequencies at which the sync word are transmitted are different. This arrangement helps detection and synchronization of the signals, despite the unavoidable frequency mismatches and collisions.

A hopping spread-spectrum wireless network for IoT applications with mobile device that have unsynchronized local frequency references. The transmitters use hopping sequences defined in term of the relative differences of frequencies, in such a manner that a receiver can determine the hopping sequence of a transmission despite the presence of a large frequency error.

A wireless communication system includes a network manager configured to wirelessly communicate with a plurality of wireless nodes of a wireless network. The network manager and at least one wireless node include a transceiver connected to transmit and receive wireless communication via an antenna. The network manager and/or the wireless node include a cognitive engine configured to receive information regarding an environment of the wireless network as input and, in response, generate configuration data as output. Subsequent communication on the wireless network is updated using the configuration data.

If the number of non-interference channels in a master communication device 1 and a slave communication device 2 does not reach a minimum necessary number, at least one channel subject to interference only in the communication device 1 or 2 having a lower transmission power is selected as at least a part of a group of channels to be used for frequency hopping. That is, a channel subject to interference only in a device having a lower transmission power is used for communication. The device having a lower transmission power has a larger received signal strength indicator of a radio wave transmitted from a partner than the device having a larger transmission power, and thus is more unlikely to be influenced by interference due to external radio waves. This can suppress degradation of the communication quality in case of interference due to external radio waves.

The present disclosure provides a method in a base station for resource configuration for Device-to-Device (D2D) Scheduling Assignment (SA) and/or D2D data transmissions for a User Equipment (UE) and a corresponding UE. The base station transmits resource configuration for the D2D SA and/or D2D data transmissions to the UE. Frequency hopping schemes for the D2D SA and/or D2D data transmissions within one subframe or between subframes are predefined at network side. The UE obtains schemes for D2D SA and/or D2D data transmissions in time domain based on the resource configuration for the D2D SA and/or D2D data transmissions transmitted from the base station. The UE obtains schemes for D2D SA and/or D2D data transmissions in time domain based on the frequency hopping schemes for the D2D SA and/or D2D data transmissions within one subframe or between subframes are predefined the at network side.

The present disclosure provides a method for fusion and inference with per-hop link quality measurements in frequency hopping satellite communication (SATCOM) systems. The method includes: grouping hops having a same SATCOM link set into one hop group such that the one hop group contains a plurality of same SATCOM link sets; grouping the measurement sets into one or more first measurement groups, based on a link identification; in the each first measurement group having the same link identification, further grouping the measurement sets having a same range of the signal amplitude measurements into one or more second measurement groups; obtaining interference conditions by associating second measurement groups of all links in each hop group based on hop identifications belonging to the second measurement groups.

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 frequency-hopped spread-spectrum multiple-access (FHSS-MA) wideband transceiver may support frequency-division multiple-access (FDMA) functionality by including a plurality of digital chains corresponding to FHSS-MA physical channels, individually and dynamically compensated for in-phase/quadrature imbalance in the transmit and/or receive portion. A FHSS-MA transceiver supporting FDMA functionality may coordinate FH sequence selection among FHSS physical channels to minimize inter-channel interference while also supporting legacy FHSS-enabled devices (e.g., Bluetooth). The FHSS-MA transceiver may be incorporated into a wireless bridge device to facilitate low-latency communications over wireless local-area networks (WLANs), wireless wide-area networks (WWANs) or broadcast, with multiple FHSS-enabled devices that may be paired with the wireless bridge device using FHSS-MA channels. The wireless bridge device may enable a FHSS-enabled device to re-pair with a personal device. Such wireless bridge devices may be networked into a wireless bridge network that may increase the number of FHSS-enabled devices that may be accommodated and/or increase coverage range.

The invention relates to a method for operating a first access node (100) of a first cellular network in which a first user entity (200) uses a first access technology with at least one first carrier frequency to access a first cell (110) of the first cellular network, the at least one first carrier frequency having a bandwidth. It comprises: determining that a second user entity (400) or a second access node (300) using a second access technology different from the first access technology may operate in the first cell (110) within the bandwidth of the at least one first carrier frequency in order to access a second cellular network, transmitting information to the first user entity (200) by which the first user entity is informed about the fact that the second user entity (400) or second access node may operate in the first cell within the bandwidth of the at least one first carrier frequency using the second access technology.

The system and method of utilizing frequency waterfilling and implicit coordination to mitigate signal jamming in Link 16 systems. The system and method of utilizing frequency waterfilling for Link 16 includes updates to both software and firmware. The frequency waterfilling approach for Link 16 modifies the process by which data bits are allocated to hops based on an assessment of hops affected by jamming, thus avoiding portions of the spectrum occupied by a jammer.