摘要:
Methods of reducing interference in a satellite communications system may include receiving a plurality of feeder link signals and time aligning the plurality of feeder link signals to provide time aligned feeder link signals. At least two of the time aligned feeder link signals may be combined to provide reduced interference of at least one of the feeder link signals. Related systems are also discussed.
摘要:
A method of providing communications can be provided by at least one space-based and/or terrestrial component of a first system/operator transmitting/receiving information using spectrum allocated to a second system/operator at an aggregate interference level at a space-based component of the second system/operator that is less than or substantially equal to a predetermined threshold. Related other methods, systems, and radioterminals are also disclosed.
摘要:
A satellite radiotelephone system includes a space-based component that is configured to communicate with multiple radiotelephones over multiple frequency bands and/or multiple air interfaces. An ancillary terrestrial network is configured to communicate terrestrially with the multiple radiotelephones over substantially the multiple frequency bands and/or substantially the multiple air interfaces. An aggregate radiated power controller is configured to limit an aggregate radiated power by the multiple radiotelephones to a maximum aggregate radiated power.
摘要:
A radiotelephone includes a single radio frequency chain and a single baseband processor that is connected thereto. The single radio frequency chain and the single baseband processor are configured to communicate with a space-based system using frequencies of a satellite band and an air interface, and to communicate with a terrestrial wireless network using frequencies of the satellite band and substantially the air interface.
摘要:
A satellite radioterminal communications system may include first and second space-based components and a return link diversity combiner. The first space-based component may be configured to communicate uni-directionally and/or bidirectionally with a first radioterminal over a first forward link using a first band of frequencies (F1) and/or over a first return link using a second band of frequencies (F2). The second space-based component may be configured to communicate uni-directionally and/or bidirectionally with a second radioterminal over a second forward link using a third band of frequencies (F3) and/or over a second return link using a fourth band of frequencies (F4). The second space-based component may also be configured to receive return link communications from the first radioterminal over the first return link using the second band of frequencies (F2), and the first and third bands of frequencies may be different bands of frequencies. The return link diversity combiner may be configured to combine return link communications received from the first radioterminal at the first and second space-based components. A satellite radioterminal communications system may also include an ancillary terrestrial network comprising a plurality of ancillary terrestrial components and a plurality of radioterminals. A radioterminal may be operatively configured to establish communications with at least one ancillary terrestrial component, with at least one space-based component and/or with at least one other network, and the at least one ancillary terrestrial component and the radioterminal may be configured to preferentially establish communications thereinbetween to thereby improve at least one measure of communications performance relative to a value of the at least one measure of communications performance when the radioterminal is communicating with an alternate network, such as, for example, a space-based network. Related methods are also discussed.
摘要:
Information content is nonidentically mapped between service link carriers and feeder link carriers at a cellular satellite. A reduced number of satellite feeder link carriers compared to the number of satellite service link carriers and/or a reduced total bandwidth of the satellite feeder link carriers compared to the satellite service link carriers thereby may be obtained.
摘要:
Cooperative Vehicular Identification Systems and Methods, capable of monitoring and recording vehicular law violations, with the assistance and cooperation of the vehicles in violation, are disclosed. Real-time information from vehicular sensors is communicated to a Central Processing Unit (CPU). Strategically located Interrogator devices, on roads/highways, at intersections, in and around school zones, integrated with traffic lights, etc., issue inquiries/interrogations to passing-by vehicles. Vehicles proximate to such Interrogators respond with unique identifying information and with parameter lists provided by their vehicular sensors. Each Interrogator inquiry can provide data, including the lawful parameter limits (i.e. speed limit) associated with its location. In response to having successfully decoded an inquiry, and in response to the state of its vehicular sensors, a vehicular Transponder may transmit information to the specific Interrogator that has issued an inquiry. The Interrogator then relays relevant identifying information to the CPU for further processing.
摘要:
A cellular communications system comprising a space based system comprising a first set of cells, and a ground based system comprising a second set of cells. The space and ground systems can optionally function substantially autonomously, with each using spectrum from at least one predetermined frequency band.
摘要:
A first radio signal is received via a first satellite reception path, for example, an antenna or spot beam, which serves a satellite cell. The received first radio signal includes a desired satellite uplink signal transmitted from a first source using a frequency assigned to the satellite cell and an interfering signal transmitted from at least one second source using the frequency assigned to the satellite cell. A second radio signal is received via a second satellite reception path, for example, via another antenna or spot beam of the system and/or via a satellite antenna beam of another system. The second radio signal includes a measure of the interfering signal. The first and second radio signals are processed to recover the desired satellite uplink signal.
摘要:
A wireless communications system may include a terrestrial network including a plurality of base stations providing communications service for radioterminals over a terrestrial network coverage area. The plurality of base stations may include interior base stations providing communications service for radioterminals in an interior portion of the terrestrial network coverage area and peripheral base stations providing communications service for radioterminals at a peripheral portion of the terrestrial network coverage area. At least one of the peripheral base stations provides transmissions directed toward an interior portion of the terrestrial network coverage area with greater power than transmissions directed away from interior portions of the terrestrial network coverage area. Related methods are also discussed.