Abstract: A method is performed by a host assembly including a controller, a power supply circuit, and a host connector to be connected to an optical module of a particular type among different types of optical modules respectively configured to accept different types of supply voltages. The method includes: when the optical module is connected to the host assembly, identifying a particular type of supply voltage, among the different types of the supply voltages, that the optical module is configured to accept; selecting, among different power modes available to the host assembly that are respectively compatible with the different types of the supply voltages, a particular power mode that is compatible with the particular type of the supply voltage; and operating in the particular power mode to provide the particular type of the supply voltage to the optical module.

Abstract: A method of automatic transmit power control in a radio communication system employing a co-channel dual-polarized radio link between a first radio station and a second radio station. The method comprises receiving a horizontal polarized signal and a vertical polarized signal transmitted from the second radio station to the first radio station and in the first radio station estimating a received power level value from said received horizontal polarized signal, and a received power level value from said received vertical polarized signal. Determined power corrections values are transmitted to the second radio station during a transmission of the first radio station to adjust the transmit power of the second radio station. The determining of said transmit power correction values are independently determined from said estimated received power level values, a target power value, a cross polarization interference threshold level value, and said cross polarization interference level values.

Abstract: The present invention relates to a method of automatic transmit power control (ATPC) in a N×N Multiple-Input Multiple-Output (MIMO) radio communication system. The ATPC method comprises estimating a received power of each radio, determining a propagation matrix comprising each radio path's attenuation between the transmitter radio unit and the receiver radio unit, determining total power corrections using the received power, the propagation matrix and a target receiver power, and applying the total power corrections to the transmitter radio units. The determining of the total power corrections further comprises determining an interference level at each receiver radio unit based on the received power and the propagation matrix, determining a power variation for the radio unit using the interference levels, and determining a power correction using the received power, the target receiver power and the propagation matrix. The power correction is applied to the transmitter radio units.

Abstract: A method of automatic transmit power control in a radio communication system employing a co-channel dual-polarized radio link between a first radio station and a second radio station. The method comprises receiving a horizontal polarized signal and a vertical polarized signal transmitted from the second radio station to the first radio station and in the first radio station estimating a received power level value from said received horizontal polarized signal, and a received power level value from said received vertical polarized signal. Determined power corrections values are transmitted to the second radio station during a transmission of the first radio station to adjust the transmit power of the second radio station. The determining of said transmit power correction values are independently determined from said estimated received power level values, a target power value, a cross polarization interference threshold level value, and said cross polarization interference level values.

Abstract: A radio communication network which comprises a plurality of radio links for communicating radio signals with orthogonal polarization. Each radio link comprises a vertical polarization communication device (11a) and a horizontal polarization communication device (11b) which share a local communication channel (11c). Each of these communication devices comprises at least one differential interface stage (21a, 21b, 31a, 31b) for communicating first data over the local communication channel (11c), based on a differential input. Each of these vertical and horizontal communication devices (11a, 11b) comprises means (27, 37) connected to the differential interface stages for communicating second data over the local communication channel by modulating a common mode of the differential interface stages.

Abstract: Automatic Gain Control AGC circuit comprising a PIN-diode attenuator having an input and an output and a control circuit connected to the attenuator so as to read a signal at the attenuator output. The control circuit is configured to supply a feedback control signal to the attenuator based on an error signal between the signal read at the attenuator output and a reference signal, so as to modulate an attenuation level of said attenuator and maintain a substantially constant power level at the attenuator output. The control circuit particularly comprises at least a resistor and a capacitor which define a time constant of the AGC circuit, so that the AGC circuit features a main pole depending on such time constant and on a voltage of the feedback control signal. The control circuit also comprises a variable gain block, which receives the feedback control signal and which is configured to modulate the main pole proportionally to a variable gain (G) of the gain block.

Abstract: A radio communication network which comprises a plurality of radio links for communicating radio signals with orthogonal polarization. Each radio link comprises a vertical polarization communication device (11a) and a horizontal polarization communication device (11b) which share a local communication channel (11c). Each of these communication devices comprises at least one differential interface stage (21a, 21b, 31a, 31b) for communicating first data over the local communication channel (11c), based on a differential input. Each of these vertical and horizontal communication devices (11a, 11b) comprises means (27, 37) connected to the differential interface stages for communicating second data over the local communication channel by modulating a common mode of the differential interface stages.

Abstract: Automatic Gain Control AGC circuit comprising a PIN-diode attenuator having an input and an output and a control circuit connected to the attenuator so as to read a signal at the attenuator output. The control circuit is configured to supply a feedback control signal to the attenuator based on an error signal between the signal read at the attenuator output and a reference signal, so as to modulate an attenuation level of said attenuator and maintain a substantially constant power level at the attenuator output. The control circuit particularly comprises at least a resistor and a capacitor which define a time constant of the AGC circuit, so that the AGC circuit features a main pole depending on such time constant and on a voltage of the feedback control signal. The control circuit also comprises a variable gain block, which receives the feedback control signal and which is configured to modulate the main pole proportionally to a variable gain (G) of the gain block.