Systems and methods for multi-channel transceiver communications

• US 9,559,746 B2
• Filed: 04/14/2016
• Issued: 01/31/2017
• Est. Priority Date: 04/25/2011
• 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): Pham, Tuan
• Application Number:
  US15/099,489
• Publication Number:
  US 20160233918A1
• Time in Patent Office: 292 Days
• Field of Search: 455/42, 455/46, 455/500, 455/73, 455/550.1, 455/553.1, 455/91, 455/102, 455/103, 455/104, 455/119, 455/63.1, 455/501, 455/114.2, 455/296
• US Class Current: 1/1
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04B 1/44 Transmit/receive switching
• CPC Class Codes: H04B 3/06 by the transmitted signal
• CPC Class Codes: H04L 25/03847 Shaping by selective switching of amplifying elements
• CPC Class Codes: H04L 25/085 Arrangements for reducing interference in line transmission systems, e.g. by differential transmission
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04W 88/085 Access point devices with remote components
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Systems and methods for transceiver communication are discussed herein. A filter module may be configured to filter each carrier signal of a multicarrier transmit signal with a different bandpass filter, each bandpass filter configured to filter a different frequency band. A carrier control module may be configured to control the plurality of bandpass filters of the filter module using a carrier selection signal to enable or disable each bandpass filter, thereby coupling carrier signals of the multicarrier transmit signal to a first set of bandpass filters and decoupling a second set of bandpass filters. Filtering the carrier signals of the multicarrier transmit signal is performed by the first set of bandpass filters while the decoupling of the second set of bandpass filters limits energy in the respective frequency band. An antenna may be configured to transmit the filtered multicarrier transmit signal.

Claims

1. A radio system, comprising:

a cable;

an antenna;

an attenuator having an attenuator first terminal coupled to the cable and having an attenuator second terminal, the attenuator configured to attenuate transmit signals and receive signals;

a first splitter having a first splitter first terminal coupled to the attenuator second terminal, and having a first splitter second terminal and a first splitter third terminal;

a second splitter having a second splitter first terminal coupled to the first splitter second terminal, and having a second splitter second terminal and a second splitter third terminal;

a first amplifier having a first amplifier output terminal coupled to the second splitter second terminal, and having a first amplifier input terminal coupled to receive a first receive signal from the antenna;

a second amplifier having a second amplifier output terminal coupled to the second splitter third terminal, and having a second amplifier input terminal coupled to receive a second receive signal from the antenna;

a third amplifier having a third amplifier input terminal coupled to the first splitter third terminal and having a third amplifier output terminal; and

a filter having a filter input terminal coupled to the third amplifier output terminal and having a filter output terminal coupled to the antenna, the filter configured to block at least a portion of the first receive signal and the second receive signal from the third amplifier output terminal, the filter further configured to pass at least a portion of the transmit signals to reach the antenna.

2. The radio system of claim 1, wherein the attenuator is a variable attenuator, includes an attenuator control terminal, and is configured to attenuate the transmit signals and the receive signals based on a power feedback signal received at the attenuator control terminal.

3. The radio system of claim 2, further comprising a power detector having a detector input terminal coupled to the filter output terminal and having a detector output terminal coupled to the attenuator control terminal, the power detector configured to measure power at the filter output terminal and to generate the power feedback signal based on the measured power to control the variable attenuator.

4. The radio system of claim 1, wherein each transmit signal is a multi-carrier transmit signal, and wherein the filter is configured to filter unused carriers of the multi-carrier transmit signal.

5. The radio system of claim 4, wherein each carrier of the multi-carrier transmit signal is associated with a respective frequency, and wherein the filter includes a switch and a bandpass filter pair for each carrier, each bandpass filter associated with the respective frequency, each switch being enabled or disabled to filter an unused carrier of the multi-carrier transmit signal from reaching the antenna.

6. The radio system of claim 5, wherein each switch is controlled by a carrier selection signal received over the cable.

7. The radio system of claim 1, wherein the cable is a coaxial cable.

8. The radio system of claim 1, wherein the antenna is a microwave antenna.

9. A method performed by a radio system, the method comprising:

receiving from a cable a first transmit signal for transmission by an antenna;

attenuating, using an attenuator, the first transmit signal from the cable;

splitting, using a first splitter, the first transmit signal from the attenuator into a second transmit signal and a third transmit signal;

passing the second transmit signal to a transmit path;

passing the third transmit signal to a receive path;

amplifying, using a first amplifier, the second transmit signal;

passing, using a filter, at least a portion of the second transmit signal from the first amplifier to the antenna for transmission;

receiving a first receive signal and a second receive signal from the antenna;

amplifying, using a second amplifier, the first receive signal;

amplifying, using a third amplifier, the second receive signal;

combining, using a second splitter, the first receive signal from the second amplifier and the second receive signal from the third amplifier to generate a first combined receive signal;

passing the first combined receive signal to the receive path;

splitting, by the first splitter, the first combined receive signal into a second combined receive signal and a third combined receive signal;

attenuating, using the attenuator, the second combined receive signal;

passing the second combined receive signal to the cable;

passing the third combined receive signal to the transmit path;

amplifying the third combined receive signal; and

blocking, using the filter, at least a portion of the third combined receive signal before the third combined receive signal reaches the antenna.

10. The method of claim 9, wherein the attenuator is a variable attenuator configured to attenuate the transmit signals and the second and third combined receive signals based on a power feedback signal.

11. The method of claim 10, further comprising measuring power at the filter, and using the measured power to generate the power feedback signal.

12. The method of claim 9, wherein each transmit signal is a multi-carrier transmit signal, and the filter is configured to filter unused carriers of the multi-carrier transmit signal.

13. The method of claim 12, wherein each carrier of the multi-carrier transmit signal is associated with a respective frequency, and wherein the filter includes a switch and a bandpass filter pair for each carrier, each bandpass filter associated with the respective frequency, each switch being enabled or disabled to filter an unused carrier of the multi-carrier transmit signal from reaching the antenna.

14. The method of claim 13, wherein each switch is controlled by a carrier selection signal received over the cable.

15. The method of claim 9, wherein the cable is a coaxial cable.

16. The method of claim 9, wherein the antenna is a microwave antenna.