Programmable power supplies for cellular base stations and related methods of reducing power loss in cellular systems
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.
1. A power supply for providing electrical power to a radio through electrical conductors whose radio ends are electrically coupled to a direct current (DC) input of the radio, comprising:
control logic circuitry configured to receive an electrical parameter level measured at the radio ends of the electrical conductors; and
conversion circuitry comprising an input configured to receive a first DC voltage and an output configured to be electrically coupled to first ends, of the electrical conductors, and to provide a direct current flowing from the first ends to the radio ends, wherein the conversion circuitry is electrically coupled to the control logic circuitry;
wherein the conversion circuitry is configured, based upon the electrical parameter level, to convert the first DC voltage to a second DC voltage, provided at the output, that is greater than the first DC voltage and to maintain a third DC voltage, at the radio ends, which is less than the second DC voltage and exceeds a recommended DC input voltage level of the radio.
2. The power supply of claim 1 , further comprising measurement circuitry configured to measure the electrical parameter level.
3. The power supply of claim 1 , wherein the third DC voltage, at the radio ends, is substantially constant notwithstanding any changes in the direct current drawn from the output.
4. The power supply of claim 1 , wherein the third DC voltage at the radio ends is less than a maximum DC input voltage rating of the radio.
5. The power supply of claim 1 , wherein the third DC voltage is within four volts of a maximum DC input voltage rating of the radio.
6. The power supply of claim 1 , wherein a magnitude of the recommended DC input voltage level is 48 V.
7. The power supply of claim 1 , wherein the electrical parameter level is a measured DC voltage level.
8. The power supply of claim 1 , wherein the third DC voltage at the radio ends is regulated relative to any changes in the direct current drawn from the output.
9. The power supply of claim 1 , wherein each of the electrical conductors includes at least two electrically connected conductive elements.
10. The power supply of claim 1 , wherein each of the electrical conductors includes at least two electrically connected conductive elements.
11. The power supply of claim 10 , wherein each of the at least two electrically connected conductive elements is a power cable.
12. A method for compensating for a voltage drop in electrical conductors providing electrical power from a power supply through radio ends of the electrical conductors to a direct current (DC) power input of a radio, comprising:
receiving, at the power supply, an electrical parameter level measured at the radio ends of the electrical conductors;
based upon the electrical parameter level, converting a first DC voltage to a second DC voltage which is higher than the first DC voltage; and
providing the second DC voltage to an output, of the power supply, configured to be electrically coupled to first ends of the electrical conductors opposite the radio ends, and to maintain a third DC voltage, at the radio ends, which is less than the second DC voltage and exceeds a recommended DC input voltage level of the radio.
13. The method of claim 12 , further comprising measuring the electrical parameter level with a measurement circuit.
14. The method of claim 12 , wherein the third DC voltage, at the radio ends, is substantially constant notwithstanding any changes in the direct current drawn from the output.
15. The method of claim 12 , wherein the third DC voltage at the radio ends is less than a maximum DC input voltage rating of the radio.
16. The method of claim 12 , wherein the third DC voltage is within four volts of a maximum DC input voltage rating of the radio.
17. The method of claim 12 , wherein a magnitude of the recommended DC input voltage level is 48 V.
18. The method of claim 12 , wherein the electrical parameter level is a measured DC voltage level.
19. The method of claim 12 , wherein the third DC voltage, at the radio ends, is regulated relative to any changes in direct current drawn from the output.
20. The method of claim 12 , wherein each of the electrical conductors includes at least two electrically connected conductive elements.
21. The method of claim 12 , wherein each of the electrical conductors includes at least two electrically connected conductive elements.
22. The method of claim 21 , wherein each of the at least two electrically connected conductive elements is a power cable.
23. A system, comprising:
electrical conductors comprising radio ends and first ends;
a radio electrically coupled to the radio ends; and
a power supply comprising a power supply output electrically coupled to the first ends and configured to provide electrical power to the radio through the electrical conductors;
wherein the power supply further comprises:
control logic circuitry configured to receive an electrical parameter level measured at the radio ends of the electrical conductors; and
conversion circuitry comprising an input configured to receive a first direct current (DC) voltage and a conversion circuitry output electrically coupled to the first ends and configured to provide a direct current flowing from the first ends to the radio ends, wherein the conversion circuitry is electrically coupled to the control logic circuitry;
wherein the conversion circuitry is configured, based upon the electrical parameter level, to convert the first DC voltage to a second DC voltage, provided at the conversion circuitry output, greater than the first DC voltage and to maintain a third DC voltage, at the radio ends, which is less than the second DC voltage of the electrical conductors and exceeds a recomended DC input voltage level of the radio.
24. The system of claim 23 , wherein the power supply further comprises measurement circuitry configured to measure the electrical parameter level.
25. The system of claim 23 , wherein the third DC voltage, at the radio ends, is substantially constant notwithstanding any changes in the direct current drawn from the conversion circuitry output.
26. The system of claim 23 , wherein the third DC voltage at the radio ends is less than a maximum DC input voltage rating of the radio.
27. The system of claim 23 , wherein the third DC voltage is within four volts of a maximum DC input voltage rating of the radio.
28. The system of claim 23 , wherein an a magnitude of the recommended DC input voltage rating is 48 V.
29. The system of claim 23 , wherein the electrical parameter level is a measured DC voltage level.
30. The system of claim 23 , wherein the third DC voltage at the radio ends is regulated relative to any changes in the direct current drawn from the conversion circuitry output.
31. The system of claim 23 , wherein each of the electrical conductors includes at least two electrically connected conductive elements.
32. The system of claim 23 , wherein each of the electrical conductors includes at least two electrically connected conductive elements.
33. The system of claim 32 , wherein each of the at least two electrically connected conductive elements is a power cable.