Systems and methods for improved high capacity in wireless communication systems

• US 8,842,788 B2
• Filed: 01/11/2013
• Issued: 09/23/2014
• Est. Priority Date: 10/17/2011
• Status: Active Grant

• Current Assignee: Aviat U.S., Inc. (Aviat Networks Incorporated)
• Original Assignee: Aviat U.S., Inc. (Aviat Networks Incorporated)
• Inventors: Kennard, Paul A., Licardie, Sergio
• Primary Examiner(s): ODOM, CURTIS B
• Application Number:
  US13/740,087
• Publication Number:
  US 20130128936A1
• Time in Patent Office: 620 Days
• Field of Search: 375/222, 375/267, 375/2, 375/99, 375/347, 375/299
• US Class Current: 375/347
• CPC Class Codes: H04B 7/08 at the receiving station
• CPC Class Codes: H04B 7/0837 using pre-detection combining H04B7/0868 takes precedence
• CPC Class Codes: H04B 7/12 Frequency diversity
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex

Abstract

An exemplary system comprises at least one antenna, first and second signal paths, and an N-plexer. The first antenna may be configured to receive first and second diversity received signals. The first signal path may have a first converter configured to convert the first diversity received signal to first carrier group. The second signal path may have a second converter configured to convert the second diversity received signal to a second carrier group. The N-plexer may be configured to provide the first and second diversity received signals to a first cable in communication with a first modem.

Claims

1. A system comprising:

a first antenna configured to receive a first diversity received signal and a second diversity received signal, the first diversity received signal and the second diversity received signal being received at a received microwave frequency and the first diversity received signal and the second diversity received signal having signal diversity;

a first signal path having a first converter configured to convert the first diversity received signal from the received microwave frequency to a first carrier group;

a second signal path having a second converter configured to convert the second diversity received signal from the received microwave frequency to a second carrier group; and

a first N-plexer configured to provide the first carrier group and the second carrier group to a first cable in communication with a first modem.

2. The system of claim 1 wherein the first antenna is further configured to receive a third diversity received signal and a fourth diversity received signal, the third diversity received signal and the fourth diversity received signal being received at the received microwave frequency and the third diversity received signal and the fourth diversity received signal having signal diversity, the system further comprising:

a third signal path having a third converter configured to convert the third diversity received signal from the received microwave frequency to a third carrier group;

a fourth signal path having a fourth converter configured to convert the fourth diversity received signal from the received microwave frequency to a fourth carrier group; and

a second N-plexer configured to provide the third carrier group and the fourth carrier group to a second cable in communication with a second modem.

3. The system of claim 1 wherein the first modem retrieves the first and second diversity received signals from the first and second carrier groups and provides the first and second diversity received signals to a path in communication with customer premises equipment.

4. The system of claim 2 wherein the second modem retrieves the third and fourth diversity received signals from the third and fourth carrier groups and provides the third and fourth diversity received signals to a path in communication with customer premises equipment.

5. The system of claim 2 wherein the first diversity received signal and the fourth diversity received signal are vertically polarized signals from the first antenna, and the second diversity received signal and the third diversity received signal are horizontally polarized signals from the first antenna.

6. The system of claim 2 further comprising:

a third N-plexer configured to receive the first carrier group and the second carrier group from the first cable;

wherein the first modem is configured to demodulate signals of the first and second carrier groups.

7. The system of claim 6 further comprising:

a fourth N-plexer configured to receive the third carrier group and the fourth carrier group from the second cable;

wherein the second modem is configured to demodulate signals of the third and fourth carrier groups.

8. The system of claim 6 wherein the first modem performs maximum ratio combining utilizing the first diversity received signal and the second diversity received signal.

9. The system of claim 7 wherein the first modem communicates with the second modem to take advantage of polarization diversity.

10. The system of claim 7 wherein the first and fourth diversity received signals are provided from an orthomode transducer coupled to the first antenna.

11. The system of claim 10 wherein the second and third diversity received signals are diverse from the first and fourth diversity received signals, the second and third diversity received signals being provided from the orthomode transducer coupled to the first antenna.

12. The system of claim 7 wherein the first, second, third and fourth carrier groups each comprise 28 MHz carriers.

13. The system of claim 7 wherein the first modem provides a first transmit diversity signal as a fifth carrier group and the second modem provides a second transmit diversity signal as a sixth carrier group, wherein:

the third N-plexer is further configured to provide the fifth carrier group to the first cable;

the fourth N-plexer is further configured to provide the sixth carrier group to the second cable;

the first N-plexer is further configured to provide the fifth carrier group to a first transmitter for transmission of the first transmit diversity signal over the first antenna at a first polarization; and

the second N-plexer is further configured to provide the sixth carrier group to a second transmitter for transmission of the second transmit diversity signal over the first antenna at a second polarization that is diverse to the first polarization.

14. The system of claim 13 wherein the first cable may propagate the first, second, and fifth carrier groups simultaneously.

15. A method comprising:

receiving, by a first antenna, a first diversity received signal and a second diversity received signal, the first diversity received signal and the second diversity received signal being received at a received microwave frequency and the first diversity received signal and the second diversity received signal having signal diversity;

converting, by a first converter electrically coupled to a first signal path, the first diversity received signal from the received microwave frequency to a first carrier group;

converting, by a second converter electrically coupled to a second signal path, the second diversity received signal from the received microwave frequency to a second carrier group; and

providing, by a first N-plexer, the first carrier group and the second carrier group to a first cable in communication with a first modem.

16. The method of claim 15 further comprising:

receiving, by the first antenna, a third diversity received signal and a fourth diversity received signal, the third diversity received signal and the fourth diversity received signal being received at the received microwave frequency and the third diversity received signal and the fourth diversity received signal having signal diversity;

converting, by a third converter electrically coupled to a third signal path, the third diversity received signal from the received microwave frequency to a third carrier group;

converting, by a fourth converter electrically coupled to a fourth signal path, the fourth diversity received signal from the received microwave frequency to a fourth carrier group; and

providing, by a second N-plexer, the third carrier group and the fourth carrier group to a second cable in communication with a second modem.

17. The method of claim 15 further comprising retrieving, by the first modem, the first and second diversity received signals from the first and second carrier groups and providing, by the first modem, the first and second diversity received signals to a path in communication with customer premises equipment.

18. The method of claim 16 further comprising retrieving, by the second modem, the third and fourth diversity received signals from the third and fourth carrier groups and providing, by the second modem, the third and fourth diversity received signals to a path in communication with customer premises equipment.

19. The method of claim 16 wherein the first diversity received signal and the fourth diversity received signal are vertically polarized signals from the first antenna, and the second diversity received signal and the third diversity received signal are horizontally polarized signals from the first antenna.

20. The method of claim 16 further comprising:

receiving, by a third N-plexer, the first carrier group and the second carrier group from the first cable; and

demodulating, by the first modem, signals of the first and second carrier groups.

21. The method of claim 19 further comprising:

receiving, by a fourth N-plexer, the third carrier group and the fourth carrier group from the second cable; and

demodulating signals, by the second modem, of the third and fourth carrier groups.

22. The method of claim 20 further comprising performing maximum ratio combining, by the first modem, utilizing the first diversity received signal and the second diversity received signal.

23. The method of claim 20 further comprising communicating between the first and second modems to take advantage of polarization diversity.

24. The method of claim 21 further comprising providing, by an orthomode transducer coupled to the first antenna, the first and fourth diversity received signals.

25. The method of claim 24 wherein the second and third diversity received signals are diverse from the first and fourth diversity received signals, the second and third diversity received signals being provided from the orthomode transducer coupled to the first antenna.

26. The method of claim 21 wherein the first, second, third and fourth carrier groups each comprise 28 MHz carriers.

27. The method of claim 21 further comprising:

providing, by the first modem, a first transmit diversity signal as a fifth carrier group;

providing, by the second modem, a second transmit diversity signal as a sixth carrier group;

providing, by the third N-plexer, the fifth carrier group to the first cable in communication with a first transmitter for transmission of the first transmit diversity signal over the first antenna at a first polarization; and

providing, by the fourth N-plexer, the sixth carrier group to the second cable in communication with a second transmitter for transmission of the second transmit diversity signal over the first antenna at a second polarization that is diverse to the first polarization.

28. A system comprising:

a first antenna configured to receive a first diversity received signal and a second diversity received signal, the first diversity received signal and the second diversity received signal being received at a received microwave frequency and the first diversity received signal and the second diversity received signal having signal diversity;

means for converting the first diversity received signal from the received microwave frequency to a first carrier group;

means for converting the second diversity received signal from the received microwave frequency to a second carrier group; and

a first N-plexer configured to provide the first carrier group and the second carrier group to a first cable in communication with a first modem.

29. The system of claim 28 wherein the first antenna is further configured to receive a third diversity received signal and a fourth diversity received signal, the third diversity received signal and the fourth diversity received signal being received at the received microwave frequency and the third diversity received signal and the fourth diversity received signal having signal diversity, the system further comprising:

means for converting the third diversity received signal from the received microwave frequency to a third carrier group;

means for converting the fourth diversity received signal from the received microwave frequency to a fourth carrier group; and

a second N-plexer configured to provide the third carrier group and the fourth carrier group to a second cable in communication with a second modem.