Systems and methods for a twisted pair transceiver with correlation detection

• US 9,577,708 B1
• Filed: 10/07/2015
• Issued: 02/21/2017
• Est. Priority Date: 10/21/2014
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell International Limited (Marvell Technology Group Limited)
• Inventors: McClellan, Brett, Han, Kuoruey
• Primary Examiner(s): Phu, Phuong
• Application Number:
  US14/877,504
• Time in Patent Office: 503 Days
• Field of Search: 375/257, 375/282, 375/333, 375/219, 375/220, 375/222, 375/342, 370/428
• US Class Current: 1/1
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 3/46 Monitoring; Testing
• CPC Class Codes: H04L 49/351 for local area network [LAN], e.g. Ethernet switches

Abstract

The systems and methods for a twisted pair transceiver with correlation detection includes a transceiver system operating on a cable. The transceiver system includes a receiver to obtain one or more data samples related to one or more encoded data symbols. The transceiver system further includes a first correlation filter to generate a first correlation output based on the one or more data samples, and a second correlation filter to generate a second correlation output based on the one or more data samples. The transceiver system further includes a detector. The detector compares the first correlation output with the second correlation output, generates an output data bit based on a comparison result, and sends the output data bit for data decoding.

Claims

1. A method for processing signals for data decoding at a transceiver, the method comprising:

obtaining, at a transceiver, one or more data samples related to one or more encoded data symbols;

generating, via a first correlation filter, a first correlation output based on the one or more data samples;

generating, via a second correlation filter, a second correlation output based on the one or more data samples;

comparing a first absolute value of the first correlation output with a second absolute value of the second correlation output;

generating an output data bit of a first binary value when the second absolute value of the second correlation output is greater than the first absolute value of the first correlation output;

generating the output data bit of a second binary value when the second absolute value of the second correlation output is no greater than the first absolute value of the first correlation output; and

sending the output data bit for data decoding.

2. The method of claim 1, wherein the one or more data samples are received from a single twisted pair cable at a single twisted pair transceiver.

3. The method of claim 1, wherein the one or more encoded data symbols include differential Manchester encoded symbols.

4. The method of claim 1, wherein each of the one or more encoded data symbols includes a symbol period that has a clock transition spacing period and a data transition spacing period.

5. The method of claim 1, wherein the first correlation filter or the second correlation filter has a number of coefficients that match a total number of the one or more data samples.

6. The method of claim 1, wherein the first correlation filter has a first set of coefficients that are pre-defined to evaluate whether the one or more data samples corresponds to an input data bit of 0.

7. The method of claim 6, wherein the second correlation filter has a second set of coefficients that are pre-defined to evaluate whether the one or more data samples correspond to an input data bit of 1.

8. The method of claim 7,

wherein the first binary value is 1 and the second binary value is 0.

9. The method of claim 1, wherein the comparing is performed at a dual set of filters for both positive and negative polarities of a first value of the first correlation output and a second value of the second correlation output.

10. The method of claim 1, wherein the one or more encoded data symbols are transmitted at a baud rate that is compatible with two or more transmission formats.

19. The system of claim 1, wherein the detector comprises a dual set of filters for both positive and negative polarities of a first value of the first correlation output and a second value of the second correlation output.

11. A transceiver system operating on a cable, the transceiver system comprising:

a receiver to obtain one or more data samples related to one or more encoded data symbols;

a first correlation filter to generate a first correlation output based on the one or more data samples;

a second correlation filter to generate a second correlation output based on the one or more data samples; and

a detector to;

compare a first absolute value of the first correlation output with a second absolute value of the second correlation output,

generate an output data bit of a first binary value when the second absolute value of the second correlation output is greater than the first absolute value of the first correlation output,

generate the output data bit of a second binary value when the second absolute value of the second correlation output is no greater than the first absolute value of the first correlation output, and

send the output data bit for data decoding.

12. The system of claim 11, wherein the one or more data samples are received from a single twisted pair cable at a single twisted pair transceiver of the transceiver system.

13. The system of claim 11, wherein the one or more encoded data symbols include differential Manchester encoded symbols.

14. The system of claim 11, wherein each of the one or more encoded data symbols includes a symbol period that has a clock transition spacing period and a data transition spacing period.

15. The system of claim 11, wherein the first correlation filter or the second correlation filter has a number of coefficients that match a total number of the one or more data samples.

16. The system of claim 11, wherein the first correlation filter has a first set of coefficients that are pre-defined to evaluate whether the one or more data samples correspond to an input data bit of 0.

17. The system of claim 16, wherein the second correlation filter has a second set of coefficients that are pre-defined to evaluate whether the one or more data samples correspond to an input data bit of 1.

18. The system of claim 17,

wherein the first binary value is 1 and the second binary value is 0.

20. The system of claim 11, wherein the one or more encoded data symbols are transmitted at a baud rate that is compatible with at least two transmission formats.