Feeder cable reduction

• US 20070135169A1
• Filed: 12/12/2005
• Published: 06/14/2007
• Est. Priority Date: 12/12/2005
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Beaudin, Steve, Sychaleun, Somsack, Carleton, Gregory
• Granted Patent: US 8,452,333 B2
• Time in Patent Office: Days
• US Class Current: 455/562.100
• CPC Class Codes: H04B 7/0842 Weighted combining
• CPC Class Codes: H04B 7/12 Frequency diversity

Abstract

The present invention facilitates the reduction of cabling required in a base station environment. When receive diversity is employed, main and diversity antennas are used to receive common signals at different locations. The signals received at the main and diversity antennas are combined with one another in the masthead and transmitted over a single feeder cable to a base housing for further processing. Thus, signals that were normally sent over separate feeder cables and combined in the base housing are combined in the masthead and sent over a single feeder cable. The technique can be replicated for each sector provided by the base station environment.

Claims

1. A method for receiving signals via masthead electronics and providing the signals to base housing electronics in a base station environment, the method comprising:

receiving first receive signals from a first antenna;

receiving second receive signals from a second antenna; and

combining the first receive signals and the second receive signals to form combined receive signals, which are sent to the base housing electronics over a single feeder cable.

2. The method of claim 1 wherein the first and second antennas are spatially diverse and the first and second receive signals are signals transmitted from a remote device and received at both of the first and second antennas.

3. The method of claim 1 wherein the first and second receive signals are received as radio frequency signals.

4. The method of claim 3 wherein first and second receive signals are combined at radio frequencies to form the combined receive signals at radio frequencies.

5. The method of claim 3 wherein the first and second receive signals are combined at baseband to form the combined receive signals at baseband, the method further comprising:

downconverting the first receive signals to baseband;

downconverting the second receive signals to baseband; and

upconverting the combined receive signals from baseband to radio frequencies prior to being sent to the base housing electronics over the single feeder cable.

6. The method of claim 3 wherein the radio frequencies of the first and second receive signals correspond to the radio frequencies of the combined receive signals.

7. The method of claim 1 further comprising sending the combined receive signals over the single feeder cable to the base housing electronics.

8. The method of claim 1 wherein the first and second receive signals are combined using diversity combining techniques to form the combined receive signals.

9. The method of claim 1 wherein the second antenna is a main antenna also used to transmit signals, and the first antenna is a diversity antenna associated with the second antenna, the method further comprising:

receiving transmit signals from the base housing electronics via the feeder cable; and

transmitting the transmit signals via the main antenna.

10. The method of claim 1 further comprising:

receiving the combined receive signals via the feeder cable at the base housing electronics; and

downconverting the combined receive signals to retrieve information signals.

11. The method of claim 1 wherein the first and second receive signals correspond to a cellular signal transmitted from a cellular communication device.

12. The method of claim 1 wherein the first and second antennas are associated with one of a plurality of sectors for the base station environment.

13. The method of claim 12 wherein each sector uses one feeder cable between the masthead electronics and the base housing electronics.

14. Base station electronics for receiving signals via masthead electronics and providing the signals to base housing electronics in a base station environment, the base station electronics comprising in the masthead:

a first input adapted to receive first receive signals from a first antenna;

a second input adapted to receive a second receive signals from a second antenna; and

combining circuitry adapted to combine the first receive signals and the second receive signals to form combined receive signals, which are sent to the base housing electronics over a single feeder cable.

15. The base station electronics of claim 14 wherein the first and second antennas are spatially diverse, and the first and second receive signals are signals transmitted from a remote device and received at both of the first and second antennas.

16. The base station electronics of claim 14 wherein the first and second receive signals are received as radio frequency signals.

17. The base station electronics of claim 16 wherein first and second receive signals are combined at radio frequencies to form the combined receive signals at radio frequencies.

18. The base station electronics of claim 16 wherein the first and second receive signals are combined at baseband to form the combined receive signals at baseband, the masthead electronics further comprising:

first downconversion circuitry adapted to downconvert the first receive signals to baseband;

second downconversion circuitry adapted to downconvert the second receive signals to baseband; and

upconversion circuitry adapted to upconvert the combined receive signals from baseband to radio frequencies prior to being sent to the base housing electronics over the single feeder cable.

19. The base station electronics of claim 16 wherein the radio frequencies of the first and second receive signals correspond to the radio frequencies of the combined receive signals.

20. The base station electronics of claim 14 further comprising coupling circuitry adapted to send the combined receive signals over the feeder cable to the base housing electronics.

21. The base station electronics of claim 14 wherein the first and second receive signals are combined using diversity combining techniques to form the combined receive signals.

22. The base station electronics of claim 14 wherein the second antenna is a main antenna also used to transmit signals and the first antenna is a diversity antenna associated with the second antenna, and further comprising coupling circuitry adapted to receive transmit signals from the base housing electronics via the feeder cable and send the transmit signals to the main antenna for transmission.

23. The base station electronics of claim 14 wherein the base housing electronics comprise downconversion circuitry adapted to downconvert the combined receive signals received via the single feeder cable to retrieve information signals.

24. The base station electronics of claim 14 wherein the first and second receive signals correspond to a cellular signal transmitted from a cellular communication device.

25. The base station electronics of claim 14 wherein the first and second antennas are associated with one of a plurality of sectors for the base station environment.

26. The base station electronics of claim 25 wherein each sector uses one feeder cable between the masthead electronics and the base housing electronics.