Abstract: A satellite communication system which provides interference mitigation across multiple constellations. The satellite communication system provides interference mitigation when an in-line event occurs where a main lobe of a satellite of the first constellation and a main lobe of a user terminal communicating with the satellite of the second satellite constellation intersect sufficiently to cause significant interference on a common frequency band of the satellite and the user terminal.

Abstract: A smart network edge (SNE) selectively mutes data packets via an optimal data path using available networks, either terrestrial or non-terrestrial. The SNE includes: a processor; a memory storing programming for the processor, a steerable antenna; and a number of modems corresponding to gateways in the available networks. The SNE is programmed to determine one or more selected data paths for data packets of a session based on avoiding or mitigating inter-constellation interference.

Abstract: Various arrangements for cross-polarization interference mitigation are detailed herein. A baseline cross-polarization interference density limits of a user terminal (UT) and a baseline throughput of the UT can be determined. An adjustment value can then be determined for an intended polarization (co-pol) isotropic radiated power (EIRP) density, such that the cross-polarization (x-pol) interference density limits are not exceeded. After determining the baseline throughput, an effective co-pol EIRP density of the UT can be set based on the adjustment value. After adjusting the effective co-pol EIRP density of the UT, an adjusted spectral efficiency of the UT can be determined resulting from the adjusting the EIRP density. Finally, an allocated bandwidth to the UT can be adjusted such that a resulting adjusted throughput of the UT at the adjusted spectral efficiency matches the baseline throughput.

Abstract: An adaptive transmit power control process enables the uplink transmit power of a user terminal to be adjusted based on a scan angle of the antenna for the user terminal. The antenna periodically reports the scan angle to the user terminal, and a current maximum transmit power for the user terminal is determined based on the scan angle. The current maximum transmit power is then used as the basis for determining an allocation of resources to the user terminal. The transmit power control process enables resources to be assigned as needed across multiple carriers and enables a power spectral density of a user terminal to be adjusted based on nominal and offset transmit power parameters.

Abstract: Provided are a charging circuit for a battery pack and a working system of a ship. The charging circuit includes a first switch circuit, a clamp gating circuit and a battery management circuit. The first switch circuit includes a first switch terminal, a second switch terminal and a switch control terminal. The clamp gating circuit includes a first clamp terminal, a second clamp terminal and at least one gating control terminal. The battery management circuit is configured to separately acquire charging voltages of multiple battery cells and a battery pack voltage between a first electrode and a second electrode in real time and control, according to the charging voltages and the battery pack voltage, a gating control signal supplied to each of the at least one gating control terminal and a switch control signal supplied to the switch control terminal.

Abstract: A light emitting device is provided. The light emitting device includes a blue light unit, configured to emit blue light; a green light unit, configured to emit green light; a red light unit, configured to emit red light; and a warm white light unit, configured to emit warm white light. A dominant wavelength of the warm white light is in a range from 570 nm to 600 nm. A color coordinate of the warm white light unit and a color coordinate of the red light unit are respectively located at opposite sides of the Planckian locus. The blue light unit, the green light unit, the red light unit and the warm white light unit are configured to cooperate to emit mixed white light and are configured to adjust a color temperature of the mixed white light.

Abstract: A satellite communication system with software defined network orchestration which provides differentiated quality of service (QoS). Implementations include a route manager (RM) that receives link status from the satellites and determines routing tables with QoS attributes which are uploaded to the satellites. The routing tables and the QoS attributes allow the satellites to route data based on a QoS attributes in a data header to achieve differentiated QoS for data routed in the network. The QoS attributes may also be used to prioritize data through a satellite node.

Abstract: A satellite communication system with software defined network orchestration. Implementations include a route management function (RMF) that receives link status from the satellites and determines simple routing tables which are uploaded to the satellites. The routing tables allow the satellites to route data based on a satellite ID placed in a data header to reduce the memory and computing load on satellite resources. Further, implementations include secure user terminal (UT) to UT IP routing in the constellation for direct UT to UT communication. The satellite communication system may combine the benefits of Medium Earth Orbit (MEO) and Low Earth Orbit (LEO) satellite systems into an MEO-LEO satellite system.

Abstract: A smart network edge (SNE) selectively mutes data packets via an optimal data path using available networks, either terrestrial or non-terrestrial. The SNE includes: a processor; a memory storing programming for the processor, a steerable antenna; and a number of modems corresponding to gateways in the available networks. The SNE is programmed to determine one or more selected data paths for data packets of a session based on avoiding or mitigating inter-constellation interference.

Abstract: A satellite communication system that combines the benefits of Medium Earth Orbit (MEO) and Low Earth Orbit (LEO) satellite systems into an MEO-LEO satellite system. The MEO-LEO system includes an LEO constellation combined with a MEO constellation where the LEO constellation may provide global coverage with broad average capacity and may support ‘hot spot’ coverage where desired. The MEO constellation may provide unique advantages including backhaul to ground in remote areas, higher traffic density for key locations, and a secure global backhaul for key customers. Data may be routed over optical inter-satellite links using Software Defined Networking concepts to provide MEO-LEO (backhaul and ground access), LEO-LEO (upstream & downstream); and (3) MEO-MEO (crosslinks & downlinks). Further, implementations described herein include secure user terminal (UT) to UT IP routing in the constellation for direct UT to UT communication.

Abstract: An adaptive transmit power control process enables the uplink transmit power of a user terminal to be adjusted based on a scan angle of the antenna for the user terminal. The antenna periodically reports the scan angle to the user terminal, and a current maximum transmit power for the user terminal is determined based on the scan angle. The current maximum transmit power is then used as the basis for determining an allocation of resources to the user terminal. The transmit power control process enables resources to be assigned as needed across multiple carriers and enables a power spectral density of a user terminal to be adjusted based on nominal and offset transmit power parameters.

Abstract: A light emitting device is provided. The device includes a red light emitting unit, a blue light emitting unit, a green light emitting unit, and a white light emitting unit. The red light emitting unit includes a first blue light emitting chip and a red fluorescent material, and a dominant wavelength of a light emitted by the red light emitting unit is in a range of 610 nanometers (nm) to 635 nm. By designing the light emitting device into a structure including the red light emitting unit, the blue light emitting unit, the green light emitting unit and the white light emitting unit, and designing the structure of the red light emitting unit, the light emitting device can realize the adjustment of ambient light and color temperature by the four light emitting units, thereby reducing cost.

Abstract: Techniques described herein provide phase and amplitude calibration of phased array antennas. In an N-by-M phased array having N*M channels, embodiments use aggregated measurements over multiple concurrently active channels to improve signal-to-leakage performance, while also using sequences of exclusion groups to yield an individualized calibration value for each channel (i.e., N*M individualized calibration values). For example, a J×K channel group of the array is selected in each of a sequence of measurement frames based on a calibration schema. Over J*K measurement sub-frames, a set of J*K aggregate measurements is obtained, each with different subsets of the channel group activated and excluded from the measurement. The aggregate calibration measurements can be used to compute J*K individualized calibration values, each for a channel of the channel group. In some implementations, each calibration value is computed as a complex value including both amplitude and phase calibrations information.

Abstract: Techniques described herein provide phase and amplitude calibration of phased array antennas. In an N-by-M phased array having N*M channels, embodiments use aggregated measurements over multiple concurrently active channels to improve signal-to-leakage performance, while also using sequences of exclusion groups to yield an individualized calibration value for each channel (i.e., N*M individualized calibration values). For example, a J×K channel group of the array is selected in each of a sequence of measurement frames based on a calibration schema. Over J*K measurement sub-frames, a set of J*K aggregate measurements is obtained, each with different subsets of the channel group activated and excluded from the measurement. The aggregate calibration measurements can be used to compute J*K individualized calibration values, each for a channel of the channel group. In some implementations, each calibration value is computed as a complex value including both amplitude and phase calibrations information.

Abstract: A satellite communication system which provides interference mitigation across multiple constellations. The satellite communication system provides interference mitigation when an in-line event occurs where a main lobe of a satellite of the first constellation and a main lobe of a user terminal communicating with the satellite of the second satellite constellation intersect sufficiently to cause significant interference on a common frequency band of the satellite and the user terminal.

Abstract: A satellite communication system with software defined network orchestration. Implementations include a route management function (RMF) that receives link status from the satellites and determines simple routing tables which are uploaded to the satellites. The routing tables allow the satellites to route data based on a satellite ID placed in a data header to reduce the memory and computing load on satellite resources. Further, implementations include secure user terminal (UT) to UT IP routing in the constellation for direct UT to UT communication. The satellite communication system may combine the benefits of Medium Earth Orbit (MEO) and Low Earth Orbit (LEO) satellite systems into an MEO-LEO satellite system.

Abstract: The present invention is a multi-component fiber includes a core and a sheathing surrounding the core. The core includes a first aliphatic polyester or copolymer of an aliphatic polyester. The sheathing includes a second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide, and a hydrophobic agent. The second aliphatic polyester or copolymer of an aliphatic polyester or a polyamide has a melt flow index of between about 0.5 and about 19.5 g/10 min using a 2.16 Kg weight at 190° C.

Abstract: A satellite communication system that combines the benefits of Medium Earth Orbit (MEO) and Low Earth Orbit (LEO) satellite systems into an MEO-LEO satellite system. The MEO-LEO system includes an LEO constellation combined with a MEO constellation where the LEO constellation may provide global coverage with broad average capacity and may support ‘hot spot’ coverage where desired. The MEO constellation may provide unique advantages including backhaul to ground in remote areas, higher traffic density for key locations, and a secure global backhaul for key customers. Data may be routed over optical inter-satellite links using Software Defined Networking concepts to provide MEO-LEO (backhaul and ground access), LEO-LEO (upstream & downstream); and (3) MEO-MEO (crosslinks & downlinks). Further, implementations described herein include secure user terminal (UT) to UT IP routing in the constellation for direct UT to UT communication.