| Patent application number | Description | Published |
|---|
| 20080214100 | Communication service subscription management - Multiple receivers may be enabled to receive satellite-based digital audio radio (SDAR) services under a single subscription. For example, an SDAR service provider can enable multiple vehicles, a home-based digital radio, or a portable digital radio, singly or in any combination. Multiple receivers transmit information to each other. One receiver is designated as a primary receiver, and the other receivers are designated as secondary receivers. The SDAR service provider transmits a list of associated secondary receivers to the primary receiver. The primary receiver enables the associated secondary receivers to receive SDAR services by placing them in an authorized state. The secondary receivers must periodically communicate with the primary receiver to remain authorized. A secondary receiver that fails to communicate with the primary receiver within a prescribed time period is switched to an unauthorized state. In this unauthorized state, the secondary receiver no longer performs as an authorized receiver. | 09-04-2008 |
| 20080247444 | System and method for multi-source communications - A system and method of multi-source communications, including a source provider, a transmitter, a receiver, a summing device, a plurality of delay devices, and a switch. The source provider provides a signal including a first and second signal. The transmitter is in communication with the source provider and the receiver. The receiver is in communication with the transmitter. The summing device combines the first and second signals received by the receiver. The delay device delays at least one of the first and second signals. The switch forms a bypass, such that at least one of the first and second signals bypasses one of the plurality of delay devices. | 10-09-2008 |
| 20080279300 | System and method of transmitting and receiving satellite digital radio signals over an odd number of frequency slots - A system and method for transmitting and receiving data which includes at least one satellite, at least one transmitter in communication with the at least one satellite, and at least one receiver in communication with the at least one satellite. The transmitter modulates source data into a first modulated signal using a first modulation and a second modulated signal using a second modulation, and transmits the first and second modulated signals over an odd number of frequency slots to the satellite. The receiver receives the first and second modulated signals and demodulates at least one of the first and second modulated signals. | 11-13-2008 |
| 20080293359 | System and method of communicating and re-using frequencies within terrestrial and satellite signal paths - A system and method for communicating and re-using frequencies is provided, which includes a source provider, at least one transmitter, and a plurality of antennas. The transmitter transmits source data along a plurality of signal paths including a first signal at a first frequency transmitted along a first satellite signal path, a second signal at a second frequency transmitted along a second satellite signal path, and a terrestrial signal transmitted along a terrestrial signal path. The terrestrial signal frequency is substantially the same as one of the first and second signal frequencies. The antennas receive signals, and include a first antenna for receiving at least the terrestrial signal along the terrestrial signal path and a second antenna for receiving at least the first signal along the first satellite signal path, the second signal along the second satellite signal path, and the terrestrial signal along the terrestrial signal path. | 11-27-2008 |
| 20090059783 | Communication system and method of receiving high priority signals and low priority signals - A communication system and method of communicating signals to a plurality of different types of receivers is provided. The communication system includes at least one transmitter that transmits a high priority signal and a low priority signal that are hierarchically modulated and transmitted as a single frequency network. At least one satellite receives and re-transmits at least one of the high priority and low priority signals. At least one of the plurality of receivers include a processor that performs the steps of storing the hierarchically modulated signal, demodulating the high priority signal from the hierarchically modulated signal, decoding the demodulated high priority signal, re-encoding the high priority signal, and processing the stored hierarchically modulated signal based upon the re-encoded high priority signal. | 03-05-2009 |
| 20090060065 | Communication system and method for receiving high priority and low priority signals - A communication system and method of communicating signals to a plurality of different types of receivers is provided. At least one transmitter transmits hierarchically modulated high priority and low priority signals as a single frequency network. At least one satellite re-transmits the high priority signal in a first circularly polarized direction and the low priority signal in a second circularly polarized direction. At least one of a first receiver having a single antenna is configured to receive the high priority signal in the first circularly polarized direction and switched to receive the low priority signal in the second circularly polarized direction, and a second receiver having a first antenna is configured to receive the high priority signal in the first circularly polarized direction, and a second antenna is configured to receive the low priority signal in the second circularly polarized direction substantially simultaneously. | 03-05-2009 |
| 20090060066 | Communication system and method for transmitting signals to a plurality of different types of receivers - A communication system and method of communicating signals to a plurality of different types of receivers is provided. The communication system includes at least one transmitter that transmits high priority and low priority signals as a single frequency network. At least one satellite receives and re-transmits at least one of the high priority and low priority signals. At least one terrestrial repeater is in communication with the at least one transmitter, and receives from the at least one transmitter and re-transmits at least one of the high priority and low priority signals. A plurality of receivers includes at least a first receiver configured to process the high priority signal to emit an output signal based upon the high priority signal, and a second receiver configured to process the high priority and low priority signals to emit an output signal based upon the high priority and low priority signals. | 03-05-2009 |
| 20090075617 | Receiver system and method for switching among a plurality of antenna elements to receive a signal - A receiver system and method for switching among a plurality of antenna elements to receive a signal. At least a portion of plurality of antenna elements receive a transmitted signal, such that the transmitted signal includes a plurality of sub-channels that are transmitted in predetermined time intervals. A switching device is in communication with the plurality of antenna elements, and switches among single antenna elements to receive the transmitted signal. A controller is in communication with the switching device, and commands the switching device to select each of the antenna elements separately in predetermined periods of time based upon the predetermined time intervals of each of the sub-channels. A power level of the transmitted signal is determined during the predetermined period of time that corresponds to the predetermined time intervals, and the controller commands the switching device to switch to an antenna element based upon the determined power level. | 03-19-2009 |
| 20100045515 | Communications system and method of communicating data - A communications system and method thereof are provided, wherein the system includes a first receiver. The first receiver includes at least one antenna element configured to receive the first signal having a first polarization, and a combiner in communication with the at least one antenna element, wherein the combiner enhances the first signal and minimizes a second signal having a second polarization that is different than the first polarization of the first signal, such that an output is emitted by the first receiver based upon the received first signal. The first receiver further includes a beam steerer in communication with the combiner, wherein the beam steerer is configured to steer an antenna beam of the at least one antenna element in order to minimize reflection of the second signal, such that the second polarization of the second signal remains different than the first polarization of the first signal. | 02-25-2010 |
| 20100060520 | Receiver device and method of receiving a plurality of signals - A receiver device and method of receiving a plurality of signals are provided, wherein the receiver device includes at least one antenna element and circuitry in communication with the at least one antenna element. The at least one antenna element is configured to receive at least a first signal having a first polarization and a second signal having a second polarization, wherein the first polarization is different than the second polarization. The circuitry is configured to process and emit an output based upon at least one of the received first and second signals, wherein the first signal is received at a first reception elevation angle with respect to the at least one antenna element that is greater than a second reception elevation angle of the second signal with respect to the at least one antenna element, and the first and second signals are transmitted at substantially the same frequency. | 03-11-2010 |
| 20100124187 | Communication system and method of communicating signals - A communication system and method are provided, wherein the system includes a first satellite orbiting in a first orbital path that communicates a first signal having a first content at a transmitting frequency while at a first elevation angle, and a second satellite orbiting in a second orbital path that communicates a second signal having a second content at the transmitting frequency while at a second elevation angle, wherein the first elevation angle is greater than the second elevation angle. The system further includes at least one terrestrial repeater that communicates a hierarchical modulated signal, wherein a hierarchical primary of the hierarchical modulated signal corresponds to the second signal communicated from the second satellite, and a hierarchical secondary of the hierarchical modulated signal corresponds to the first signal communicated from the first satellite, such that the first and second signals are communicated at the same transmitting frequency. | 05-20-2010 |
| 20100195482 | HIERARCHICALLY MODULATED OFDM COMMUNICATION FROM A SATELLITE-BASED TRANSMITTER WITH REDUCED SECONDARY DATA LOSS FROM CLIPPING - High priority data and low priority digital data are transmitted as primary and secondary data in hierarchically modulated, orthogonal frequency division multiplexing (OFDM) from an earth-orbiting satellite. To enable the transmitter amplifier to be operated with less back-off from saturation without clipping, the low priority OFDM symbols have fewer samples than the high priority OFDM symbols, and the high priority samples on which the low priority samples are superimposed are selected according to a first deterministic rule using sample power comparisons of the high priority samples to concentrate the low priority samples on those high priority samples having lower (optimally, the lowest) sample power. The low priority samples are distributed on the selected high priority samples according to a second deterministic rule relating the original low priority sample order to the original high priority sample order. | 08-05-2010 |
