Systems and methods for supporting more flexible coverage areas and spatial capacity assignments using satellite communications systems are disclosed. A hub-spoke, bent-pipe satellite communications system includes: terminals; gateways; a controller for specifying data for controlling satellite operations in accordance with a frame definition including timeslots for a frame and defining an allocation of capacity between forward and return traffic; and a satellite including: pathways; at least one LNA, an output of which is for coupling to a pathway and to amplify uplink beam signals in accordance with the allocation; and at least one HPA, an input of which is for coupling to the pathway and to amplify downlink beam signals in accordance with the allocation, and wherein the frame definition specifies at least one pathway as a forward pathway for at least one timeslot and as a return pathway for at least one other timeslot in the frame.

Systems and methods for supporting more flexible coverage areas and spatial capacity assignments using satellite communications systems are disclosed. A hub-spoke, bent-pipe satellite communications system includes: terminals; gateways; a controller for specifying data for controlling satellite operations in accordance with a frame definition including timeslots for a frame and defining an allocation of capacity between forward and return traffic; and a satellite including: pathways; at least one LNA, an output of which is for coupling to a pathway and to amplify uplink beam signals in accordance with the allocation; and at least one HPA, an input of which is for coupling to the pathway and to amplify downlink beam signals in accordance with the allocation, and wherein the frame definition specifies at least one pathway as a forward pathway for at least one timeslot and as a return pathway for at least one other timeslot in the frame.

In one implementation, a wireless communication terminal includes a sense antenna module configured to sample an interference signal. The wireless communication terminal also includes a primary antenna module configured to receive a desired signal. The sense antenna module has a first polarization type, and the primary antenna module has a second polarization type, substantially orthogonal to the first polarization type of the sense antenna module. In addition, the wireless communication terminal includes at least one signal combiner configured to receive output from the sense antenna module and output from the primary antenna module. The at least one signal combiner is configured to mitigate interference with the desired signal by shifting the phase of the output from the sense antenna module by substantially 180 degrees and combining the phase-shifted output from the sense antenna module with the output of the primary antenna module to produce an interference mitigated signal.

In one implementation, a wireless communication terminal includes a sense antenna module configured to sample an interference signal. The wireless communication terminal also includes a primary antenna module configured to receive a desired signal. The sense antenna module has a first polarization type, and the primary antenna module has a second polarization type, substantially orthogonal to the first polarization type of the sense antenna module. In addition, the wireless communication terminal includes at least one signal combiner configured to receive output from the sense antenna module and output from the primary antenna module. The at least one signal combiner is configured to mitigate interference with the desired signal by shifting the phase of the output from the sense antenna module by substantially 180 degrees and combining the phase-shifted output from the sense antenna module with the output of the primary antenna module to produce an interference mitigated signal.

A system and method for beam switching by a User Terminal (UT). The method includes initiating a beam switch between an old beam and a new beam when the UT is disposed in an overlap area of the old beam and the new beam; duplicating over the new beam, at a Network Access Point (NAP), user traffic to the UT; and assigning a Time Division Multiplex Access (TDMA) allocation for the UT on the new beam, prior to an arrival of the UT on the new beam, where the user traffic traversing a satellite network remains uninterrupted during the beam switch and the NAP redirects user traffic for the UT via the old beam to the new beam.

A method for transmitting data from a population of devices to a relay station travelling with respect to one another. For transmitting the data to the relay station, each device includes at least one transmission slot resulting from a channel access method and a transmission window within which the relay station is to travel. The relay station is to broadcast an instruction to the population of devices before the data transmission, and, upon receiving the instruction, at least part of the population of devices is to set a modified transmission slot.

A method for disconnecting a wireless time-division duplex communication link, said time-division duplex communication link being between a first node transmitting during time slots allocated to said first node and a second node transmitting during separate time slots allocated to said second node, said first node transmitting at a respective one of a plurality of frequency bands during each of said time slots allocated to said first node, said method may include sub-dividing a time slot allocated to said first node into consecutive time intervals; and disrupting communication between said first node and said second node by transmitting, using a transmitter, respective interference signals during at least some of said time intervals of the time slot to provide an aggregated disconnect signal of the time slot, each of said interference signals being transmitted on one of said plurality of frequency bands, wherein for at least two of said time intervals said interference signals are transmitted on different frequency bands.

A switch node provided with a switch, an input interface and an output interface. The input interface is adapted to couple to a first communication link to receive a first TDM frame having a user payload field containing a first user data from the first communication link, and a frame overhead field containing a first identification. The input interface is configured to validate the first identification in the frame overhead field and reject the first TDM frame responsive to the first identification being invalid, and to forward the first user data to the switch responsive to the first identification being valid. The output interface is adapted to couple to a second communication link. The output interface is configured to receive the first user data from the switch, and to generate a second TDM frame having a second user payload field containing the first user data, and a second frame overhead field containing a second identification that is different from the first identification. The output interface is also configured to transmit the second TDM frame onto the second communication link.

The present invention is designed to make it possible to adequately form the search space candidates to be used in the blind decoding of downlink control information when the radio resource region for downlink control channels is expanded. The radio base station of the present invention is a radio base station that transmits downlink control information for a user terminal by using an enhanced downlink control channel that is frequency-division-multiplexed with a downlink shared data channel, and has a configuring section that configures, for the user terminal, a plurality of resource sets that are each formed by including a plurality of resource blocks allocated to the enhanced downlink control channel, and a determining section that determines enhanced control channel elements to constitute a plurality of search space candidates such that the plurality of search space candidates of each resource set are all placed in different resource blocks.

A method of operating a data processing system to generate a jitter-injected signal from an input signal that is a function of time is disclosed. A time offset corresponding to a first time is generated according to a jitter specification that specifies the offset as a function of time. The jitter-injected signal at the first time is generated by evaluating the input signal at a time equal to a sum of the time offset and the first time. If the jitter specification only provides offsets at signal crossing times, interpolation is used to derive time offsets at non-signal crossing times.