Abstract: An optical communication device includes: a heat-dissipation base; an insulating housing disposed on the heat-dissipation base, made of a heat-insulating material, and defining an inner space that has an opening facing the heat-dissipation base; a circuit board disposed in the inner space; an optical transceiver disposed in the inner space and on the circuit board; and a thermoelectric cooler disposed on the heat-dissipation base, and electrically connected to an external temperature control circuit, received in the opening, controlled by an external temperature control circuit, and being configured for heating and cooling the optical transceiver so as to control temperature of the optical transceiver.

Abstract: A fiber-optic communication device includes a modulator, a combiner and an electronic-to-optical transducer. The modulator is to modulate a number (N) of radio-frequency carriers respectively with a number (M) of digital stream signals respectively into a number (N) of modulated signals having different central frequencies. The combiner is to receive the modulated signals, and to combine the modulated signals into a combined signal having a number (N) of different frequency components. The electronic-to-optical transducer is to receive the combined signal, and to convert the combined signal into a single-wavelength optical signal carrying a number (N) of radio frequency signals having different central frequencies.

Abstract: A fiber-optic communication apparatus includes first and second communication devices interconnected by an optical fiber cable. The first communication device converts one of a calibration signal with a predetermined power level and a radio frequency (RF) signal into an optical signal. The second communication device converts the optical signal, which is transmitted through the optical fiber cable, into an electrical signal, detects a power level of the electrical signal associated with the calibration signal, obtains a power attenuation ratio based on the power level detected thereby and the predetermined power level, and adjusts the power level of the electrical signal associated with the RF signal based on the power attenuation ratio.

Abstract: The disclosure provides an expansion assembly configured to increase a transmitting distance of a MIMO system, the expansion assembly comprises N first RF front end units, N second RF front end units, a first power divider and combiner, and a second power divider and combiner. The first power divider and combiner connects with each of the first RF front end units, for delivering a first signal polarized in a first direction to the each of the first RF front end units. The second power divider and combiner connects with each of the second RF front end units, for delivering a first signal polarized in a first direction to the each of the second RF front end units. Accordingly, the first and second signal polarized in a second directions are capable of being transmitted in different directions, so as to implement the omni-directional transmission and increase the transmission distance.

Abstract: A fiber-optic communication apparatus includes first and second communication devices interconnected by an optical fiber cable. The first communication device converts one of a calibration signal with a predetermined power level and a radio frequency (RF) signal into an optical signal. The second communication device converts the optical signal, which is transmitted through the optical fiber cable, into an electrical signal, detects a power level of the electrical signal associated with the calibration signal, obtains a power attenuation ratio based on the power level detected thereby and the predetermined power level, and adjusts the power level of the electrical signal associated with the RF signal based on the power attenuation ratio.

Abstract: A fiber-optic communication apparatus includes a modulator, a combiner and an electro-optic converter. The modulator modulates a number (N) of radio frequency (RF) signals with the same frequency respectively into a number (N) of modulated signals with mutually different frequencies, where N?2. The combiner is coupled to the modulator for combining the modulated signals therefrom into a combined signal that has a number (N) of components with mutually different frequencies. The electro-optic converter is coupled to the combiner for converting the combined signal therefrom into an optical signal that has a number (N) of components with mutually different frequencies.

Abstract: A wireless communication system with multiple inputs and multiple outputs for simultaneously transmitting or receiving a plurality of sub-signals with a first direction of polarization or a second direction of polarization is disclosed. The system includes N antennas, an expansion module and N signal processors. The expansion module is connected to each of the antennas and each of the signal processors, to be selectively operated under a receiving mode or a transmitting mode, for integrating or allocating the sub-signal with the first direction of polarization corresponding to one of the antennas and the sub-signal with the second direction of polarization corresponding to another antenna, based on control signals provided by each of the signal processors. Accordingly, the system can expand the number of input and output interfaces by twice without additional and complete components for receiving or transmitting.

Abstract: The disclosure provides an expansion assembly configured to increase a transmitting distance of a MIMO system, the expansion assembly comprises N first RF front end units, N second RF front end units, a first power divider and combiner, and a second power divider and combiner. The first power divider and combiner connects with each of the first RF front end units, for delivering a first signal polarized in a first direction to the each of the first RF front end units. The second power divider and combiner connects with each of the second RF front end units, for delivering a first signal polarized in a first direction to the each of the second RF front end units. Accordingly, the first and second signal polarized in a second directions are capable of being transmitted in different directions, so as to implement the omni-directional transmission and increase the transmission distance.

Abstract: A wireless communication system with multiple inputs and multiple outputs for simultaneously transmitting or receiving a plurality of sub-signals with a first direction of polarization or a second direction of polarization is disclosed. The system includes N antennas, an expansion module and N signal processors. The expansion module is connected to each of the antennas and each of the signal processors, to be selectively operated under a receiving mode or a transmitting mode, for integrating or allocating the sub-signal with the first direction of polarization corresponding to one of the antennas and the sub-signal with the second direction of polarization corresponding to another antenna, based on control signals provided by each of the signal processors. Accordingly, the system can expand the number of input and output interfaces by twice without additional and complete components for receiving or transmitting.