DEVICES AND METHODS FOR DIVERSITY SIGNAL ENHANCEMENT AND COSITE CANCELLATION

• US 20160329926A1
• Filed: 07/22/2016
• Published: 11/10/2016
• Est. Priority Date: 02/21/2014
• Status: Active Grant

• Current Assignee: Archaius, Inc.
• Original Assignee: Physical Devices, LLC
• Inventors: Vosburgh, Frederick
• Granted Patent: US 9,866,267 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04B 15/04 the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04B 7/0894 using different delays between antennas
• CPC Class Codes: H04L 27/01 Equalisers baseband equalizers at the transmitter end H04L25/03343; in analogue transmission systems H04B3/04, H04B7/005
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence

Abstract

Devices and methods for providing enhanced diversity reception and cosite cancellation are disclosed. According to one aspect, the subject matter described herein includes a device for providing enhanced diversity reception and cosite cancellation. The device includes a transmit chain connected to a circulator further connected to first antenna and to a combiner. The combiner is connected to anti-cosite circuitry and to first detector. The anti-cosite circuitry is further connected to a secondary antenna. The first detector is further connected to a receive chain.

Claims

1. A device for providing enhanced diversity reception and/or cosite cancellation, the device comprising:

a first antenna for transmitting and receiving signals;

a circulator for connecting a transmit chain to the first antenna and for connecting the first antenna to a first input of a combiner;

a second antenna for receiving signals;

adjusting circuitry for connecting the second antenna to a second input of the combiner; and

a first detector for detecting an output of the combiner and providing the detected signal to a receive chain.

2. The device of claim 1 wherein the adjusting circuitry operates to reduce cosite interference.

3. The device of claim 1 comprising a phase shifter.

4. The device of claim 3 comprising at least one selectable fixed phase delay elements.

5. The device of claim 4 comprising a selector for selecting one of the at least one fixed phase delay elements.

6. The device of claim 1 wherein the adjusting circuitry comprises an amplifier.

7. The device of claim 1 comprising an attenuator.

8. The device of claim 1 wherein the adjusting circuitry comprises a phase shifter connected to a signal amplifier.

9. The device of claim 1 comprising a controller connected to at least one of:

a detector;

a phase shifter;

an amplifier; and

an attenuator.

10. The device of claim 9 comprising at least one of:

a second detector between the first antenna and the first input of the combiner; and

a third detector between the adjusting circuitry and the second input of the combiner.

11. The device of claim 9 wherein the adjusting circuitry is controllable.

12. The device of claim 1, wherein the device comprises a mobile communication device.

13. The device of claim 12, wherein the mobile communication device comprises a cellular telephone.

14. A method for providing enhanced diversity reception and/or cosite cancellation, the method comprising:

transmitting or receiving signals using a first antenna;

receiving a first signal from the first antenna;

detecting a diversity signal with a second antenna;

adjusting the diversity signal to provide an adjusted diversity signal; and

combining the adjusted diversity signal and the first signal to provide enhanced receiving of the first signal.

15. The method of claim 14 wherein adjusting the diversity signal comprises changing amplitude of the diversity signal.

16. The method of claim 15 wherein amplifying the diversity signal includes equalizing an amplitude of cosite content of the diversity signal to be amplitude equalized with respect to an amplitude of cosite content of the first signal.

17. The method of claim 14 wherein adjusting the diversity signal comprises phase shifting the diversity signal.

18. The method of claim 17 wherein phase shifting the diversity signal includes aligning cosite content of the adjusted diversity signal anti-phase with respect to cosite content of the first signal when the adjusted diversity signal and the first signal are combined.

19. The method of claim 17 comprising attenuating the diversity signal prior to phase shifting the diversity signal.

20. The method of claim 17 wherein the phase shifting is of at least one type of:

active, passive, variable, controlled and fixed.

21. The method of claim 14 wherein combining the adjusted diversity signal and the first signal includes providing the first signal to a combiner via a circulator.

22. The method of claim 14 wherein combining the adjusted diversity signal and the first signal includes at least one of:

destructive combining of cosite contents of the adjusted diversity signal and the first signal; and

constructive combining of the adjusted diversity signal and the first signal.

23. The method of claim 22 wherein the combining is conducted for plurality of frequencies.

24. The method of claim 14 comprising compensating a phase delay of the first signal.

25-46. -46. (canceled)