The present disclosure provides a communication method, including: receiving a Doppler parameter; and determining a time compensation amount for a signal based on the Doppler parameter. When the method is performed by a terminal device, the terminal device can receive the Doppler parameter from a satellite or a satellite measurement and control center. When the method is performed by a satellite, the satellite can receive the Doppler parameter from a satellite measurement and control center. Therefore, the apparatus performing the method does not need to calculate the Doppler parameter locally, thereby reducing the burden on the apparatus.

A frequency capacity fill rate analyzing system for analyzing the frequency capacity fill rate of wireless communication links, in particular satellite communication links, includes at least one transmitter and at least one receiver between which the communication link is established, and a spectrum analyzer associated to the at least one receiver. The spectrum analyzer is connected to a central controlling device that is provided with a data processing unit on which an analysis task management software is running, and which is connected to a database in which technical parameters of the communication link are stored. The data processing unit is configured such that the spectrum analyzer automatically analyzes the frequency capacity fill rate of radio frequency signals transmitted via the communication link on the basis of an analysis task obtained from the central controlling device.

An antenna device includes a reflecting mirror, a primary radiator connected with a wireless device including a transmitter and a receiver, a radiator support mechanism that rotatably supports the primary radiator at a focusing position of the mirror with respect to a central axis of the radiator, evaluation data acquisition unit that acquires evaluation data that is data regarding a polarization direction angle that is a tilt angle of a polarization plane of the radiator with respect to a horizontal direction, a tilt angle of its own device correlated with the polarization direction angle, or a detection level, polarization plane adjuster that adjusts the polarization plane of the radiator based on the evaluation data, trigger input unit that inputs a trigger to the polarization plane adjuster, wherein the polarization plane adjuster rotates the radiator to adjust the polarization plane of the radiator according to timing provided by the trigger.

Methods and systems for communicating a message through a communication network are provided. A method for transmitting a message through a communication network may include: partitioning the message into at least two parts; generating at least two bit sequences each of which carries a corresponding part of the message; modulating the at least two bit sequences to form a modulated signal frame which includes at least two modulated parts corresponding to the at least two bit sequences, respectively, where the at least two modulated parts of the modulated signal frame have different power levels; and transmitting the modulated signal frame through the communication network.

Adaptive communications focal plane arrays that may be implemented in, e.g., a specially-configured camera that can be utilized to receive and/or process information in the form of optical beams are presented. A specialized focal plane array (FPA) having a plurality of optical detectors is utilized, where one or more optical detectors are suppressed such that data is not allowed to be output from the one or more suppressed optical detectors, and only a significantly smaller number or subset of optical detectors receiving optical beams are allowed to output data. In this way, the rate at which data is to be output by an adaptive communications FPA (ACFPA) can be significantly reduced.

Adaptive communications focal plane arrays that may be implemented in, e.g., a specially-configured camera that can be utilized to receive and/or process information in the form of optical beams are presented. A specialized focal plane array (FPA) having a plurality of optical detectors is utilized, where one or more optical detectors are suppressed such that data is not allowed to be output from the one or more suppressed optical detectors, and only a significantly smaller number or subset of optical detectors receiving optical beams are allowed to output data. In this way, the rate at which data is to be output by an adaptive communications FPA (ACFPA) can be significantly reduced.

In one embodiment, a method for monitoring a structure includes associating a passive sensor with the structure, the sensor being configured to measure a physical parameter of the structure that is indicative of the structure's condition, associating a dual-channel transceiver with the structure, the transceiver having a sensing repeater that operates on a first channel and a reference repeater that operates on a second channel, wherein the sensing repeater is connected to the passive sensor, receiving with a receive antenna of the reference repeater an interrogation signal transmitted from an interrogation device, multiplying a frequency of the received interrogation signal with the reference repeater to generate a reference response signal having a multiplied frequency, and transmitting the reference response signal with the reference repeater to the interrogation device.

Adaptive communications focal plane arrays that may be implemented in, e.g., a specially-configured camera that can be utilized to receive and/or process information in the form of optical beams are presented. A specialized focal plane array (FPA) having a plurality of optical detectors is utilized, where one or more optical detectors are suppressed such that data is not allowed to be output from the one or more suppressed optical detectors, and only a significantly smaller number or subset of optical detectors receiving optical beams are allowed to output data. In this way, the rate at which data is to be output by an adaptive communications FPA (ACFPA) can be significantly reduced.

Adaptive communications focal plane arrays that may be implemented in, e.g., a specially-configured camera that can be utilized to receive and/or process information in the form of optical beams are presented. A specialized focal plane array (FPA) having a plurality of optical detectors is utilized, where one or more optical detectors are suppressed such that data is not allowed to be output from the one or more suppressed optical detectors, and only a significantly smaller number or subset of optical detectors receiving optical beams are allowed to output data. In this way, the rate at which data is to be output by an adaptive communications FPA (ACFPA) can be significantly reduced.

A wireless radio repeater includes an antenna configured to receive a message associated with an electric power delivery system. The wireless radio repeater also includes circuitry configured to receive electrical measurement data, identify a condition of the electric power delivery system based on the electrical measurement data, and cause the antenna to re-transmit the message received via the antenna in response to identifying the condition based on the electrical measurement data.