Apparatus and method for interference cancellation in wireless mobile stations operating concurrently on two or more air interfaces

• US 20070066226A1
• Filed: 09/21/2005
• Published: 03/22/2007
• Est. Priority Date: 09/21/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Seong, Cleveland, Joseph, Loh, Lup
• Granted Patent: US 7,761,075 B2
• Time in Patent Office: Days
• US Class Current: 455/63.100
• CPC Class Codes: H04B 1/00 Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
• CPC Class Codes: H04B 7/002 Reducing depolarization effects
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

An apparatus and method for interference cancellation in wireless mobile stations operating concurrently in two or more wireless modes.

Claims

1. A method for interference cancellation in a mobile station, comprising:

communicating in a first mode of wireless communication using a first antenna having a first polarization; and

communicating in a second mode of wireless communication using a second antenna having a second polarization, concurrent with communicating in the first mode of wireless communication, wherein the second polarization is substantially orthogonal to the first polarization.

2. The method of claim 1, further comprising performing an interference cancellation process between the communication in the first mode of wireless communication and the communication in the second mode of wireless communication.

3. The method of claim 2, wherein the interference cancellation process includes digitally combining the communications in the first and second modes to remove interfering and blocking signals.

4. The method of claim 2, wherein the interference cancellation process is at least partially performed using a least mean square finite impulse response processor.

5. The method of claim 1, wherein the first mode of wireless communication and the second mode of wireless communication are each selected from the group consisting of CDMA2000, 1XEV/DO, WCDMA, GSM and IEEE802.16e.

6. The method of claim 1, wherein the first mode of wireless communication and second mode of wireless communication are in the same frequency band.

7. A mobile station capable of communicating in a wireless network, comprising:

a first antenna having a first polarization;

a second antenna having a second polarization, wherein the second polarization is substantially orthogonal to the first polarization; and

a processor,

wherein the mobile station is configured to;

communicate in a first mode of wireless communication using the first antenna; and

communicate in a second mode of wireless communication using the second antenna, concurrent with communicating in the first mode of wireless communication.

8. The mobile station of claim 7, wherein the mobile station is further configured to perform an interference cancellation process between the communication in the first mode of wireless communication and the communication in the second mode of wireless communication.

9. The mobile station of claim 8, wherein the interference cancellation process includes digitally combining the communications in the first and second modes to remove interfering and blocking signals.

10. The mobile station of claim 8, wherein the interference cancellation process is at least partially performed using a least mean square finite impulse response processor.

11. The mobile station of claim 7, wherein the first mode of wireless communication and second mode of wireless communication are each selected from the group consisting of CDMA2000, 1XEV/DO, WCDMA, GSM and IEEE802.16e.

12. The mobile station of claim 7, wherein the first mode of wireless communication and second mode of wireless communication are in the same frequency band.

13. A mobile station capable of communicating in a wireless network, comprising:

a first antenna having a first polarization for receiving a first wireless signal;

a second antenna having a second polarization for receiving a second wireless signal, wherein the second polarization is orthogonal to the first polarization; and

an interference cancellation stage, connected to the first and second antennas to receive signals corresponding to the first and second wireless signals.

14. The mobile station of claim 13, wherein the interference cancellation stage includes a least mean square finite impulse response processor.

15. The mobile station of claim 13, wherein the interference cancellation stage includes an amplifier for adjusting the signal strength of at least one signal.

16. The mobile station of claim 13, wherein the interference cancellation stage includes a time adjust circuit to adjust the time delay of at least one signal.

17. The mobile station of claim 13, wherein the interference cancellation stage includes a cross-pole combiner to subtract signals corresponding to the first and second wireless signals.