Method and system for reducing signal interference

• US 8,005,430 B2
• Filed: 03/02/2009
• Issued: 08/23/2011
• Est. Priority Date: 12/14/2004
• Status: Expired due to Fees

• Current Assignee: Intersil Americas LLC (Renesas Electronics Corporation)
• Original Assignee: Quellan, Inc. (Renesas Electronics Corporation)
• Inventors: Tentzeris, Emmanouil M., Gebara, Edward, Stelliga, Anthony, Laskar, Joy, Kim, Andrew Joo
• Primary Examiner(s): PHAM, TUAN
• Application Number:
  US12/380,654
• Publication Number:
  US 20090170438A1
• Time in Patent Office: 904 Days
• Field of Search: 455/63.1, 455/63.3, 455/67.11, 455/278.1, 455/296, 455/114.2, 385/100, 385/101, 385/114
• US Class Current: 455/63.1
• CPC Class Codes: H04B 1/123 using adaptive balancing or compensation means adaptive filter circuits and algorithms H03H
• CPC Class Codes: H04B 1/7103 the interference being multiple access interference

Abstract

Signals propagating on an aggressor communication channel can cause interference in a victim communication channel. A sensor coupled to the aggressor channel can obtain a sample of the aggressor signal. The sensor can be integrated with or embedded in a system, such as a flex circuit or a circuit board, that comprises the aggressor channel. The sensor can comprise a dedicated conductor or circuit trace that is near an aggressor conductor, a victim conductor, or an EM field associated with the interference. An interference compensation circuit can receive the sample from the sensor. The interference compensation circuit can have at least two operational modes of operation. In the first mode, the circuit can actively generate or output a compensation signal that cancels, corrects, or suppresses the interference. The second mode can be a standby, idle, power-saving, passive, or sleep mode.

Claims

1. A method for interference suppression, comprising the steps of:

receiving a sample of a communication signal imposing interference on a receiver of a cellular device;

providing an interference compensation signal in response to processing the sample with a model; and

suppressing the interference in response to applying the interference compensation signal to the interference,

wherein a lane of a data bus of a flex circuit provides the sample via sensing electromagnetic energy coupling onto the lane from at least one other lane of the data bus.

2. The method of claim 1, wherein the lane of the data bus is dedicated to sensing the electromagnetic energy.

3. The method of claim 1, wherein the lane comprises a sensor.

4. The method of claim 1, wherein an interference sensor comprises the lane of the data bus and a lane of another data bus.

5. The method of claim 1, wherein the data bus comprises a plurality of traces running substantially parallel to one another along a surface of the flex circuit,

wherein the lane comprises one of the traces, and

wherein the another lane comprises another one of the traces.

6. The method of claim 5, wherein the one of the traces extends across other traces of the plurality of traces adjacent a terminal end of the data bus.

7. The method of claim 5, wherein the one of the traces crosses other traces of the plurality of traces adjacent a digital signal processing chip.

8. The method of claim 1, wherein electromagnetic energy coupling onto the lane from the at least one another lane comprises electromagnetic energy transmitting across a physical separation between the lane and the at least one another lane.

9. The method of claim 1, wherein the lane provides the sample via sensing the electromagnetic energy coupling onto the lane from the at least one other lane during a time period when the lane is void of purposeful data.

10. The method of claim 1, wherein the cellular device comprises a mobile phone, a cellular phone, a hand-held radio, a handset, a radio handset, a portable wireless device, a cellular telephone, or a personal data assistant.

11. The method of claim 1, wherein the flex circuit comprises a flex cable.

12. The method of claim 1, wherein the receiver comprises a GSM radio receiver.