Transmitter for point-to-point radio system

• US 8,750,792 B2
• Filed: 03/15/2013
• Issued: 06/10/2014
• Est. Priority Date: 07/26/2012
• Status: Expired due to Fees

• Current Assignee: REMEC Broadband Wireless Networks LLC (Moseley Associates, Inc.)
• Original Assignee: Remec Broadband Wireless LLC (Moseley Associates, Inc.)
• Inventors: Bowman, Charles, Moeenziai, Behzad
• Primary Examiner(s): Urban, Edward F.
• Assistant Examiner(s): Hanidu, Ganiyu A
• Application Number:
  US13/836,081
• Publication Number:
  US 20140030977A1
• Time in Patent Office: 452 Days
• Field of Search: 455/39, 455/63.1, 455/69, 455/127.2, 455/67.11, 455/444, 455/101, 455/132, 455/272, 455/52.1, 455/52.3, 455/278.1
• US Class Current: 455/39
• CPC Class Codes: H04B 1/50 using different frequencies for the two directions of communication
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04L 5/1461 Suppression of signals in the return path, i.e. bidirectional control circuits

Abstract

Embodiments of the present invention are directed to methods, apparatuses, and systems for implementing a point-to-point radio architecture in which the isolation needed between the transmitter and receiver may be achieved through the use of separate antennas. One embodiment is directed at a radio head comprising a transmitter configured to operate at a first frequency, a receiver configured to operate at a second frequency, and a processor coupled to both the transmitter and the receiver. The transmitter is further coupled to a first antenna interface coupled to a first antenna configured to transmit signals at the first frequency. The receiver is further coupled to a second antenna interface coupled to a second antenna configured to receive signals at the second frequency.

Claims

1. A radio head in a point-to-point communication system, the radio head comprising:

a transmitter configured to operate at a first frequency;

a receiver configured to operate at a second frequency; and

a processor coupled to both the transmitter and the receiver, wherein the transmitter is further coupled to a first antenna interface that is coupled to a first antenna configured to transmit signals at the first frequency, and wherein the receiver is further coupled to a second antenna interface that is coupled to a second antenna configured to receive signals at the second frequency,

wherein the radio head is a first radio head and wherein the processor is a first processor, wherein the first processor is coupled to a second processor of a second radio head, and wherein the second radio head comprises;

a second transmitter configured to operate at a third frequency, and

a second receiver configured to operate at a fourth frequency,

wherein the second processor is coupled to both the second transmitter and the second receiver, wherein the second transmitter is further coupled to a third antenna interface coupled to a third antenna configured to transmit signals at the third frequency, and wherein the second receiver is further coupled to a fourth antenna interface coupled to a fourth antenna configured to receive signals at the fourth frequency,

wherein the first radio head and the second radio head operate alternately, wherein the first frequency and the third frequency are the same, and wherein the second frequency and the fourth frequency are the same.

2. The radio head of claim 1, wherein the first antenna interface passes signals substantially without electrical loss from the transmitter to the first antenna, and wherein the second antenna interface passes signals substantially without electrical loss as received from the second antenna to the receiver.

3. The radio head of claim 1, wherein the first and second antenna are integrated into a single antenna array.

4. The radio head of claim 1, wherein the first radio head is a primary radio head, and wherein the second radio head is a protection radio head.

5. The radio head of claim 1, wherein the first radio head and the second radio head operate simultaneously on different frequencies, and wherein the first radio head and the second radio head are configured to send and receive signals having orthogonally different polarizations from each other.

6. The radio head of claim 1, wherein the first radio head and the second radio head operate simultaneously on the same frequencies, and wherein the first radio head and the second radio head send and receive signals having orthogonally different polarizations from each other.

7. The radio head of claim 6, wherein the first radio head is a horizontal polarity radio head, wherein the horizontal polarity radio head is configured to transmit and receive signals having a horizontal polarization, wherein the second radio head is a vertical polarity radio head, and wherein the vertical polarity radio head is configured to transmit and receive signals having a vertical polarization.

8. The radio head of claim 1, wherein the first antenna and the second antenna are high isolation antennas.

9. The radio head of claim 1, wherein at least one of the first antenna and the second antenna is a WTA or CTS antenna-type.

10. The radio head of claim 1, wherein the first antenna and the second antenna are of different antenna types.

11. A point-to-point radio communication system comprising:

two or more radio heads, comprising at least a first radio head and a second radio head, each of the two or more radio heads including

a transmitter configured to operate at a first frequency,

a receiver configured to operate at a second frequency, and

a processor coupled to both the transmitter and the receiver, wherein the transmitter is further coupled to a first antenna interface that is coupled to a first antenna configured to transmit signals at the first frequency, and wherein the receiver is further coupled to a second antenna interface that is coupled to a second antenna configured to receive signals at the second frequency;

wherein the first radio head and the second radio head are configured to communicate with each other;

a first antenna coupled to the first antenna interface of the first radio head, which is coupled to the transmitter of the first radio head;

a second antenna coupled to the second antenna interface of the first radio head, which is coupled to the receiver of the first radio head;

a third antenna coupled to the first antenna interface of the second radio head, which is coupled to the transmitter of the second radio head; and

a fourth antenna coupled to the second antenna interface of the second radio head, which is coupled to the receiver of the second radio head, wherein the transmitter of the first radio head is configured to transmit a first signal using the first antenna, wherein the fourth antenna of the second radio head is configured to receive the first signal, wherein the transmitter of the second radio head is configured to transmit a second signal using the third antenna, and wherein the second antenna of the first radio head is configured to receive the second signal.

12. The point-to-point radio communication system of claim 11, wherein the first signal is transmitted at a first frequency and wherein the second signal is transmitted at a second frequency, wherein the first frequency and second frequency are different.

13. The point-to-point communication system of claim 11, wherein the first signal and the second signal are sent and received on a first channel, and wherein the system further comprises a second set of radio heads configured to send and receive signals on a second channel.

14. The point-to-point communication system of claim 11, wherein the first signal and the second signal have a first polarization, and wherein the system further comprises a second set of radio heads configured to send and receive signals having a second polarization, and wherein the second polarization is orthogonal from the first polarization.

15. The point-to-point communication system of claim 13, wherein the first signal and the second signal have a first polarization, and wherein the second set of radio heads are further configured to send and receive signals having a second polarization, and wherein the second polarization is orthogonal from the first polarization.

16. The point-to-point radio communication system of claim 11, wherein the first antenna interface of the first radio head does not cause electrical losses for signals passed from the transmitter to the first antenna of the first radio head, wherein the second antenna interface of the first radio head does not cause electrical losses for signals received from the second antenna of the first radio head and passed to the receiver, wherein the first antenna interface of the second radio head does not cause electrical losses for signals passed from the transmitter to the first antenna of the second radio head, and wherein the second antenna interface of the second radio head does not cause electrical losses for signals received from the second antenna of the second radio head and passed to the receiver.

17. The point-to-point radio communication system of claim 11, wherein the first and second antenna are integrated into a single antenna array.

18. The point-to-point radio communication system of claim 11, wherein the first antenna and the second antenna are high isolation antennas.

19. The point-to-point radio communication system of claim 11, wherein at least one of the first antenna and the second antenna is a WTA or CTS antenna-type.

20. A radio head in a point-to-point communication system, the radio head comprising:

a transmitter configured to operate at a first frequency;

a receiver configured to operate at a second frequency; and

a processor coupled to both the transmitter and the receiver, wherein the transmitter is further coupled to a first antenna interface that is coupled to a first antenna configured to transmit signals at the first frequency, and wherein the receiver is further coupled to a second antenna interface that is coupled to a second antenna configured to receive signals at the second frequency,

wherein the radio head is a first radio head and wherein the processor is a first processor, wherein the first processor is coupled to a second processor of a second radio head, and wherein the second radio head comprises;

a second transmitter configured to operate at a third frequency, and

a second receiver configured to operate at a fourth frequency,

wherein the second processor is coupled to both the second transmitter and the second receiver, wherein the second transmitter is further coupled to a third antenna interface coupled to a third antenna configured to transmit signals at the third frequency, and wherein the second receiver is further coupled to a fourth antenna interface coupled to a fourth antenna configured to receive signals at the fourth frequency,

wherein the first radio head and the second radio head operate simultaneously, wherein the first frequency and the third frequency are different, and wherein the second frequency and the fourth frequency are different.

21. The radio head of claim 20, wherein the first antenna interface passes signals substantially without electrical loss from the transmitter to the first antenna, and wherein the second antenna interface passes signals substantially without electrical loss as received from the second antenna to the receiver.

22. The radio head of claim 20, wherein the first and second antenna are integrated into a single antenna array.

23. The radio head of claim 20, wherein the first antenna and the second antenna are high isolation antennas.

24. The radio head of claim 20, wherein at least one of the first antenna and the second antenna is a WTA or CTS antenna-type.