Methods of powering a radio that is mounted on a tower of a cellular base station are provided in which a direct current (DC) power signal is provided to the radio over a power cable and a voltage level of the output of the power supply is adjusted so as to provide a substantially constant voltage at a first end of the power cable that is remote from the power supply. Related cellular base stations and programmable power supplies are also provided.

A method is provided. The method comprises receiving at least one parameter measured at a first end of a power cable proximate to a remote radio head coupled to the first end of the power cable; and using the at least one parameter, determining a voltage level of an output of a power supply system, coupled to the second end of the power cable, that maintains the voltage at a the first end at a constant level or within a range.

A method is provided. The method comprises determining configuration data; wherein the configuration data comprises a resistance of a bypass circuit coupled between a remote radio head and a power cable; using the configuration data, determining the resistance of the power cable coupling a programmable power supply to the remote radio head mounted on a mounting structure, comprising: entering a calibration mode; setting an output voltage of the programmable power supply; measuring an output current of the programmable power supply; storing the output current; and determining the cable resistance; and storing the resistance of the power cable.

Disclosed is a method, implemented in a related supply unit, for generating a supply voltage for electronic appliances of digital communications that allows to dampen noise in the communication bandwidth by reducing the frequency of switching noise when the number of active phone lines connected to the supply unit increases, senses which phone lines are active and, at each switching cycle, allows that a certain amount of electric energy is absorbed by one active line at the time. The method is implemented in a related supply unit.

A transmission device includes a first connecting module for connecting a DC/DC power converter to a telephone wire line or to a CPE wire line, and a second connecting module between the telephone and CPE wire lines, a detection module configured to detect a power feeding request signal on the CPE wire line, and a switching module configured to controls the second connecting module in its open state, and send a power ready signal on the CPE wire line, and a not control the second connecting module and not send a signal on the CPE wire line in a standby-by state, so that a total power consumption of the detection and switching modules is lower than a threshold in a stand-by state and higher in the active state, and the detection module is configured to control the switching module in response to a detection of the power feeding request signal.

Methods of powering a radio that is mounted on a tower of a cellular base station are provided in which a direct current (DC) power signal is provided to the radio over a power cable and a voltage level of the output of the power supply is adjusted so as to provide a substantially constant voltage at a first end of the power cable that is remote from the power supply. Related cellular base stations and programmable power supplies are also provided.

Methods of powering a radio that is mounted on a tower of a cellular base station are provided in which a direct current (DC) power signal is provided to the radio over a power cable and a voltage level of the output of the power supply is adjusted so as to provide a substantially constant voltage at a first end of the power cable that is remote from the power supply. Related cellular base stations and programmable power supplies are also provided.

Methods of powering a radio that is mounted on a tower of a cellular base station are provided in which a direct current (DC) power signal is provided to the radio over a power cable and a voltage level of the output of the power supply is adjusted so as to provide a substantially constant voltage at a first end of the power cable that is remote from the power supply. Related cellular base stations and programmable power supplies are also provided.

Techniques are provided for diminishing power loss in electrical conductors used to provide electrical power to a radio configured to use time domain duplexing (TDD). Because the TDD radio typically transmits data during a downlink subframe, the TDD radio generally consumes more power, and thus draws more current through the electrical conductors, then during an uplink subframe when the TDD radio is configured to receive. Thus, during the downlink subframe, a DC voltage, output by a DC-DC voltage converter to the electrical conductors, is increased to lessen current drawn by the radio through the electrical conductors. As a result, power loss in the electrical conductors is reduced.