Systems and methods for signal frequency division in wireless communication systems

• US 9,654,241 B2
• Filed: 05/10/2016
• Issued: 05/16/2017
• 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.
• Primary Examiner(s): LEE, SIU M
• Application Number:
  US15/151,272
• Publication Number:
  US 20160254874A1
• Time in Patent Office: 371 Days
• Field of Search: 375219, 375220, 375222, 375295, 375316, 375259, 375267, 375299, 375347, 375349
• CPC Class Codes: H04B 7/0613 using simultaneous transmission H04B7/0686 takes precedence
• CPC Class Codes: H04B 7/0805 with single receiver and antenna switching H04B7/0822 takes precedence
• CPC Class Codes: H04B 7/0817 with multiple receivers and antenna path selection
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04J 1/20 in which at least one carrier is angle-modulated H04J1/02 takes precedence; FM without multiplex H04B1/00, H04B14/006, H04B15/00; PSK H04L5/12; impulse-modulation without multiplex H04B14/02; time-division multiplexing for data transmission H04L5/22; telemetry G08C15/06 - G08C15/12; telephony H04Q11/00, H04Q11/04, H04Q11/0407
• CPC Class Codes: H04J 11/0063 of multipath interference, e.g. Rake receivers
• CPC Class Codes: H04J 2011/0009 with FDM/FDMA
• CPC Class Codes: H04L 27/0002 analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line duplex arrangements H04L5/143
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

A system may include at least one antenna for receiving a first receive signal having a first signal diversity property and a second receive signal having a second signal diversity property. A first signal path may include a first frequency converter for downconverting the first receive signal to a first intermediate frequency signal having a first intermediate frequency. A second signal path may include a second frequency converter for downconverting the second receive signal to a second intermediate frequency signal having a second intermediate frequency. A transducer module may route the first receive signal to the first signal path, and route the second receive signal to the second signal path. A first N-plexer may select the first intermediate frequency signal or the second intermediate frequency signal for transmission to a cable, and to provide a data signal based on a selected intermediate frequency signal to the cable.

Claims

1. A system, comprising:

an N-plexer configured to

receive from a cable a first receive signal having a first receive frequency, the first receive signal being generated from a first diversity receive signal received by at least one antenna,

receive from the cable a second receive signal having a second receive frequency different than the first receive frequency, the second receive signal being generated from a second diversity receive signal received by the at least one antenna, the first diversity receive signal and the second diversity receive signal having signal diversity,

provide the first receive signal to a first signal path based on the first receive frequency, and

provide the second receive signal to a second signal path based on the second receive frequency; and

a modem coupled to the N-plexer and configured to

receive the first receive signal from the first signal path,

receive the second receive signal from the second signal path, and

demodulate the first receive signal and the second receive signal to generate a data signal.

2. The system of claim 1, wherein the first receive signal is redundant to the second receive signal.

3. The system of claim 1, wherein the first receive signal and the second receive signal provide different portions of the data signal.

4. The system of claim 1, wherein:

the system is part of an indoor unit;

the cable couples the indoor unit to an outdoor unit; and

the outdoor unit is coupled to the at least one antenna.

5. The system of claim 1, wherein

the modem is further configured to

receive a second data signal for wireless radio frequency transmission by the at least one antenna,

modulate the second data signal to generate a transmit signal for wireless radio frequency transmission by the at least one antenna, and

forward the transmit signal to the first signal path;

and

the N-plexer is further configured to provide the transmit signal to the cable at a third frequency.

6. A method, comprising:

receiving by an N-plexer from a cable a first receive signal having a first receive frequency, the first receive signal being generated from a first diversity receive signal received by at least one antenna;

receiving by the N-plexer from the cable a second receive signal having a second receive frequency different than the first receive frequency, the second receive signal being generated from a second diversity receive signal received by the at least one antenna, the first diversity receive signal and the second diversity receive signal having signal diversity;

providing by the N-plexer the first receive signal to a first signal path based on the first receive frequency;

providing by the N-plexer the second receive signal to a second signal path based on the second receive frequency;

receiving by a modem the first receive signal from the first signal path;

receiving by the modem the second receive signals from the second signal path; and

demodulating by the modem the first receive signal and the second receive signal to generate a data signal.

7. The method of claim 6, wherein the first receive signal is redundant to the second receive signal.

8. The method of claim 6, wherein the first receive signal and the second receive signal provide different portions of the data signal.

9. The method of claim 6, wherein:

the N-plexer and the modem are part of an indoor unit;

the cable couples the indoor unit to an outdoor unit; and

the outdoor unit is coupled to the at least one antenna.

10. The method of claim 6, further comprising:

receiving by the modem a second data signal for wireless radio frequency transmission by the at least one antenna;

modulating by the modem the second data signal to generate a transmit signal for wireless radio frequency transmission by the at least one antenna;

forwarding by the modem the transmit signal to the first signal path; and

providing by the N-plexer the transmit signal to the cable at a third frequency.

11. A system, comprising:

a modem configured to

receive a data signal for wireless radio frequency transmission by at least one antenna,

modulate at least a first portion of the data signal to generate a first transmit signal, the first transmit signal generated for wireless radio frequency transmission by the at least one antenna using a first signal diversity,

modulate at least a second portion of the data signal to generate a second transmit signal, the second transmit signal generated for wireless radio frequency transmission by the at least one antenna using a second signal diversity, the first signal diversity being diverse from the second signal diversity,

forward the first transmit signal to a first signal path, and

forward the second transmit signal to a second signal path; and

an N-plexer coupled to the first signal path and to the second signal path, and configured to

provide the first transmit signal to a cable at a first frequency, and

provide the second transmit signal to the cable at a second frequency different than the first frequency.

12. The system of claim 11, wherein the at least the first portion of the data signal and the at least the second portion of the data signal are the same portion.

13. The system of claim 11, wherein the at least the first portion of the signal is different than the at least the second portion.

14. The system of claim 11, wherein the first frequency and the second frequency are intermediate frequencies between baseband and radio frequency.

15. The system of claim 11, wherein

the N-plexer is further configured to

receive from the cable a first receive signal at a third frequency different than the first and second frequencies, the first receive signal being generated from a first diversity receive signal received by the at least one antenna,

receive from the cable a second receive signal at a fourth frequency different than the first, second and third frequencies, the second receive signal being generated from a second diversity receive signal received by the at least one antenna, the first diversity receive signal and the second diversity receive signal having signal diversity,

provide the first receive signal to the first signal path based on the third frequency, and

provide the second receive signal to the second signal path based on the fourth frequency;

and

the modem is further configured to

receive the first receive signal from the first signal path,

receive the second receive signal from the second signal path, and

demodulate the first receive signal and the second receive signal to generate a second data signal.

16. A method, comprising:

receiving by a modem a data signal for wireless radio frequency transmission by at least one antenna;

modulating by the modem at least a first portion of the data signal to generate a first transmit signal, the first transmit signal generated for wireless radio frequency transmission by the at least one antenna using a first signal diversity;

modulating by the modem at least a second portion of the data signal to generate a second transmit signal, the second transmit signal generated for wireless radio frequency transmission by the at least one antenna using a second signal diversity, the first signal diversity being diverse from the second signal diversity;

forwarding by the modem the first transmit signal to a first signal path;

forwarding by the modem the second transmit signal to a second signal path;

providing the first transmit signal to a cable at a first frequency; and

providing the second transmit signal to the cable at a second frequency different than the first frequency.

17. The method of claim 16, wherein the at least the first portion of the data signal and the at least the second portion of the data signal are the same portion.

18. The method of claim 16, wherein the at least the first portion of the data signal is different than the at least the second portion of the data signal.

19. The method of claim 16, wherein the first frequency and the second frequency are intermediate frequencies between baseband and radio frequency.

20. The method of claim 16, further comprising:

receiving by an N-plexer from the cable a first receive signal at a third frequency different than the first and second frequencies, the first receive signal being generated from a first diversity receive signal received by the at least one antenna;

receiving by the N-plexer from the cable a second receive signal at a fourth frequency different than the first, second and third frequencies, the second receive signal being generated from a second diversity receive signal received by the at least one antenna, the first diversity receive signal and the second diversity receive signal having signal diversity;

providing by the N-plexer the first receive signal to the first signal path based on the third frequency;

providing by the N-plexer the second receive signal to the second signal path based on the fourth frequency;

receiving by the modem the first receive signal from the first signal path;

receiving by the modem the second receive signal from the second signal path; and

demodulating by the modem the first receive signal and the second receive signal to generate a second data signal.