DIGITAL SIGNAL PROCESSING RECEIVERS, SYSTEMS AND METHODS FOR IDENTIFYING DECODED SIGNALS

• US 20100245121A1
• Filed: 03/29/2010
• Published: 09/30/2010
• Est. Priority Date: 03/30/2009
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Reed, Christopher Paul, Conn, David Kirk
• Granted Patent: US 8,294,591 B2
• Time in Patent Office: Days
• US Class Current: 340/855.400
• CPC Class Codes: E21B 47/18 through the well fluid , e.g. mud pressure pulse telemetry

Abstract

A digital signal processing receiver, a system and/or a method identifies a decoded signal. The receiver, system and/or method extract at least one sequence of one or more symbols from a digital incoming signal to generate an extracted sequence of symbols. The receiver, system and/or method generate a first result based on a comparison of the extracted sequence of symbols and one or more possible matching digital signals of a set of idealized model data according to a Bayesian probability theory. The receiver, system and/or method generates a second result based on a comparison of an equalized version of the digital incoming signal and the one or more possible matching digital signals. The receiver, system and/or method generates a third result based on a comparison of the extracted sequence of symbols and one or more possible matching digital signals of a modified set of idealized model data. The receiver, system and/or method compare the first, second and third results to determine an idealized result, and identify a decoded signal for the actual incoming signal based on the idealized result.

Claims

1. A method for identifying a decoded signal for an incoming signal, the method comprising:

processing an incoming signal via a signal processing receiver, wherein the receiver extracts at least one sequence of one or more symbols from the incoming signal to generate an extracted sequence of symbols;

performing a first data comparison with the extracted sequence of symbols and one or more possible matching signals of a set of idealized model data according to a probability theory, wherein the first comparison generates a first result;

performing a second data comparison with an equalized version of the incoming signal and the one or more possible matching signals of the set of idealized model data, wherein the second comparison generates a second result;

performing a third data comparison with the extracted sequence of symbols and one or more possible matching signals of a modified set of idealized model data, wherein the third data comparison generates a third result; and

identifying a decoded signal for the incoming signal based on the first, second and third results.

2. The method according to claim 1, wherein the incoming signal is a digital incoming signal.

3. The method according to claim 1, further comprising:

identifying a known pattern of the extracted sequence of symbols; and

applying one or more sets of one or more mathematical operations to the extracted sequence of symbols to generate the equalized version of the incoming signal.

4. The method according to claim 3, wherein the probability theory is a Bayesian probability theory.

5. The method according to claim 1, further comprising:

determining an estimation for a channel response based on the extracted sequence of symbols; and

generating the modified set of idealized model data based on the estimation for the channel response.

6. The method according to claim 5, further comprising:

replacing the set of idealized model data with the modified set of idealized model data.

7. The method according to claim 1, further comprising:

comparing the first, second and third result to determine an idealized result from the first, second and third results, wherein the idealized result has a bit pattern that is substantially the same as the extracted sequence of symbols, wherein the decoded signal for the incoming signal is based on idealized result.

8. A system for identifying a decoded signal for an incoming signal, comprising:

a signal processing receiver adapted to receive an incoming signal, wherein the receiver extracts at least one sequence of one or more symbols from the incoming signal to generate an extracted sequence of symbols;

first means for comparing the extracted sequence of symbols and one or more possible matching signals of a set of idealized model data according to a probability theory, wherein the first means for comparing generates a first result;

second means for comparing an equalized version of the incoming signal and the one or more possible matching signals of the set of idealized model data, wherein the second means for comparing generates a second result;

means for identifying a decoded signal for the incoming signal based on an idealized result determined from at least the first and second results, wherein the idealized result has a bit pattern that is substantially the same as the extracted sequence of symbols.

9. The system according to claim 8, further comprising:

third means for comparing the extracted sequence of symbols of the incoming signal and one or more possible matching signals of a modified set of idealized model data, wherein the third means for comparing generates a third result, wherein the idealized result is determined from the first, second and third results.

10. The system according to claim 9, wherein the receiver compares a limited number of possibilities for an extracted sequence having a large bit size and rejects a substantial majority of possibilities for the extracted sequence having the large bit size based on at lease one of the first, second and third results.

11. The system according to claim 8, wherein the receiver is configured to analyze one or more symbols in a middle of the extracted sequence of symbols without allowing one or more adjacent symbols within the extracted sequence of symbols to compensate one or more symbols near one or more edges of the extracted sequence of symbols, wherein the one or more adjacent symbols are adjacent to the one or more symbols near the one or more edges of the extracted sequence of symbols.

12. The system according to claim 8, wherein the probability theory is a Bayesian probability theory.

13. The system according to claim 8, wherein the incoming signal is a digital incoming signal.

14. Computer-readable storage medium having stored thereon one or more programs that enable a processor to process data and information, wherein the one or more programs comprises a series of program instructions which when executed by a processor using software cause the processor to:

extract at least one sequence of symbols from an incoming signal to generate an extracted sequence of symbols;

generate a first result based on a comparison of the extracted sequence of symbols and one or more possible matching signals of a set of idealized model data according to a probability theory;

generate a second result based on a comparison of the extracted sequence of symbols and one or more possible matching signals of a modified set of idealized model data; and

identify a decoded signal for the incoming signal based on an idealized result determined from at least the first and second results, wherein the idealized result has a bit pattern that is substantially the same as the extracted sequence of symbols.

15. The computer-readable storage medium according to claim 14, wherein the series of program instructions which when executed by a processor using software further cause the processor to:

generate a third result based on a comparison of an equalized version of the incoming signal and the one or more possible matching signals of the set of idealized model data, wherein the idealized result is determined from the first, second and third results.

16. The computer-readable storage medium according to claim 14, wherein the series of program instructions which when executed by a processor using software further cause the processor to:

apply one or more sets of one or more mathematical operations to the extracted sequence of symbols to generate the equalized version of the incoming signal, wherein the one or more sets of one or more mathematical operations are based on a known pattern of the extracted sequence of symbols.

17. The computer-readable storage medium according to claim 14, wherein the series of program instructions which when executed by a processor using software further cause the processor to:

generate the modified set of idealized model data by utilizing an estimation for a channel response to generate the modified set of idealized model data, wherein the estimation for the channel response is based on the extracted sequence of symbols.

18. The computer-readable storage medium according to claim 17, wherein the series of program instructions which when executed by a processor using software further cause the processor to:

replace the set of idealized model data with the modified set of idealized model data.

19. The computer-readable storage medium according to claim 14, wherein the incoming signal is a digital incoming signal.

20. The computer-readable storage medium according to claim 14, wherein the probability theory is a Bayesian probability theory.