A system and method for providing multi-input multi-output (MIMO) feeder links for a multibeam satellite system. The method includes configuring a X×Y MIMO antenna system using X-antennae having dominant line-of-sight (LoS) of Y-antennae; transmitting, simultaneously, a Tx signal as X Tx signals on a MIMO channel with the X-antennae; receiving the X Tx signals on the MIMO channel with the Y-antennae as Y Rx signals, wherein each of the Y-antennae generate one of the Y Rx signals; and ground-interference processing the X Tx signals or the Y Rx signals to recover the Tx signal; satellite-interference processing the X Tx signals or the Y Rx signals to recover the Tx signal. In the method, the ground interference processing includes countermeasures as either pre-interference processing when the X-antennae are disposed on a ground or post-interference processing when the X-antennae are disposed in a Geosynchronous orbit satellite. Gateway diversity for multiple MIMO feeder links utilizing these countermeasures improves weather-resiliency and significantly enhances overall satellite network availability.

A system and method for providing multi-input multi-output (MIMO) feeder links for a multibeam satellite system. The method includes configuring a X×Y MIMO antenna system using X-antennae having dominant line-of-sight (LoS) of Y-antennae; transmitting, simultaneously, a Tx signal as X Tx signals on a MIMO channel with the X-antennae; receiving the X Tx signals on the MIMO channel with the Y-antennae as Y Rx signals, wherein each of the Y-antennae generate one of the Y Rx signals; and ground-interference processing the X Tx signals or the Y Rx signals to recover the Tx signal; satellite-interference processing the X Tx signals or the Y Rx signals to recover the Tx signal. In the method, the ground interference processing includes countermeasures as either pre-interference processing when the X-antennae are disposed on a ground or post-interference processing when the X-antennae are disposed in a Geosynchronous orbit satellite. Gateway diversity for multiple MIMO feeder links utilizing these countermeasures improves weather-resiliency and significantly enhances overall satellite network availability.

A communication apparatus includes: an antenna including a base having a dome shape, a first antenna element disposed in a first region including a zenith of the base, and one or more second antenna elements disposed in a second region surrounding the first region; and beam forming circuitry that controls, based on position information of a target satellite to communicate with, a beam formation of the first antenna element and the one or more second antenna elements.

A communication apparatus includes: an antenna including a base having a dome shape, a first antenna element disposed in a first region including a zenith of the base, and one or more second antenna elements disposed in a second region surrounding the first region; and beam forming circuitry that controls, based on position information of a target satellite to communicate with, a beam formation of the first antenna element and the one or more second antenna elements.

A wireless device receives, from a base station, access network information. The wireless device determines, based on the access network information, an access network type. The wireless device selects, based on the access network type, a non-access stratum (NAS) period value from between a first NAS period value associated with a terrestrial network (TN) access network type; and a second NAS period value associated with a geostationary earth orbit (GEO) access network type. The wireless device sends, to an access and mobility management function (AMF), a first NAS request message. The wireless device starts, based on the sending the first NAS request message, a NAS period using the NAS period value.

A wireless device receives, from a base station, access network information. The wireless device determines, based on the access network information, an access network type. The wireless device selects, based on the access network type, a non-access stratum (NAS) period value from between a first NAS period value associated with a terrestrial network (TN) access network type; and a second NAS period value associated with a geostationary earth orbit (GEO) access network type. The wireless device sends, to an access and mobility management function (AMF), a first NAS request message. The wireless device starts, based on the sending the first NAS request message, a NAS period using the NAS period value.

Disclosed embodiments relate satellites using a Software-Defined Radio (“SDR”) system. In one example, a geostationary (GEO) satellite includes an antenna system including multiple antennas, each configured to provide a spot beam having an adjustable throughput for a terrestrial coverage area while the antenna is in an active state and the satellite is in orbit above the Earth, a front-end subsystem communicatively coupled to the antenna system having an input side including an input filter and an analog-to-digital converter, and an output side including an output filter and a digital-to-analog converter, and a software defined radio (“SDR”) communicatively coupled to the antenna system via the front-end subsystem. The SDR, in response to a surge modification request, modifies a throughput of each active antenna by increasing or decreasing a share of a satellite power budget allotted to the antenna by deactivating or activating a previously active or previously inactive antenna, respectively.

Disclosed embodiments relate satellites using a Software-Defined Radio (“SDR”) system. In one example, a geostationary (GEO) satellite includes an antenna system including multiple antennas, each configured to provide a spot beam having an adjustable throughput for a terrestrial coverage area while the antenna is in an active state and the satellite is in orbit above the Earth, a front-end subsystem communicatively coupled to the antenna system having an input side including an input filter and an analog-to-digital converter, and an output side including an output filter and a digital-to-analog converter, and a software defined radio (“SDR”) communicatively coupled to the antenna system via the front-end subsystem. The SDR, in response to a surge modification request, modifies a throughput of each active antenna by increasing or decreasing a share of a satellite power budget allotted to the antenna by deactivating or activating a previously active or previously inactive antenna, respectively.

A satellite system may have a constellation of communications satellites. Satellite terminal equipment may be used to communicate with the satellite constellation. The satellite terminal equipment may have indoor and outdoor equipment that can communicate wirelessly. Power may be conveyed wirelessly between the indoor equipment and the outdoor equipment. The indoor equipment may include communications circuitry for supporting communications with electronic devices. The outdoor equipment may include satellite communications circuitry. The satellite communications circuitry may include antennas, satellite transceiver circuitry, and modems. Wireless communications between the indoor and outdoor equipment may be supported using radio-frequency wireless communications circuits or optical communications circuits.

A satellite system may have a constellation of communications satellites. Satellite terminal equipment may be used to communicate with the satellite constellation. The satellite terminal equipment may have indoor and outdoor equipment that can communicate wirelessly. Power may be conveyed wirelessly between the indoor equipment and the outdoor equipment. The indoor equipment may include communications circuitry for supporting communications with electronic devices. The outdoor equipment may include satellite communications circuitry. The satellite communications circuitry may include antennas, satellite transceiver circuitry, and modems. Wireless communications between the indoor and outdoor equipment may be supported using radio-frequency wireless communications circuits or optical communications circuits.