System and method for high speed communications using digital signal processing

• US 20010035994A1
• Filed: 02/28/2001
• Published: 11/01/2001
• Est. Priority Date: 02/28/2000
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Vorenkamp, Pieter, Agazzi, Oscar E., Chan, Kevin T., Ungerboeck, Gottfried, Parhi, Keshab K., Wakayama, Myles H., Lutkemeyer, Christian A.
• Granted Patent: US 7,933,341 B2
• Time in Patent Office: Days
• US Class Current: 398/135
• CPC Class Codes: G09G 2370/18 Use of optical transmission of display information
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: H03M 1/0604 at one point, i.e. by adjusting a single reference value, e.g. bias or gain error gain setting for range control H03M1/18
• CPC Class Codes: H03M 1/1215 using time-division multiplexing
• CPC Class Codes: H04L 25/03146 with a recursive structure H04L25/03127 takes precedence
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 25/497 by correlative coding, e.g. partial response coding or echo modulation coding transmitters and receivers for partial response systems transversal equalizers at the transmitter end H04L25/03343
• CPC Class Codes: H04L 25/4975 Correlative coding using Tomlinson precoding, Harashima precoding, Trellis precoding or GPRS

Abstract

Various systems and methods related to equalization precoding in a communications channel are disclosed. In one implementation preceding is performed on signals transmitted over an optical channel. In one implementation preceding and decoding operations are performed in parallel to facilitate high speed processing in relatively low cost circuits. Initialization of the precoders may be realized by transmitting information related to the characteristics of the channel between transceiver pairs.

Claims

1. A integrated circuit transceiver comprising:

at least one transmit section comprising at least one parallel equalization precoder; and

at least one receive section comprising at least one parallel equalization decoder.

2. An optical transmission system comprising:

at least one equalization precoder for generating a precoded signal;

at least one optical driver for converting the precoded signal to an optical signal and adapted to transmit the precoded signal over an optical channel;

at least one optical receiver adapted to receive the optical signal from the optical channel and for converting the optical signal to an electrical signal; and

at least one equalization decoder for decoding the electrical signal.

3. A system for initializing an equalization precoder comprising:

at least one buffer for receiving data from a transmitter via a channel;

at least one decision feedback equalizer adapted to receive data from the at least one buffer and adapted to generate channel data associated with a response of the channel; and

at least one data inserter for inserting at least a portion of the channel data into the channel for transmission to a precoder in the transmitter.

4. A method for providing equalization preceding comprising the steps of:

performing trellis encoding on an input data signal to generate trellis encoded data;

performing equalization preceding on the trellis encoded data to generate precoded data;

performing forward equalization on received encoded data to generate forward equalized data; and

performing trellis decoding on the forward equalized data to generate decoded data.

5. A transceiver comprising:

at least one receiver comprising;

at least one interleaved analog to digital converter.

6. The transceiver of

claim 5

wherein the receiver further comprises parallel digital signal processors.

7. The transceiver of

claim 5

wherein the receiver further comprises at least one digital signal processor comprising at least one forward equalizer.

8. The transceiver of

claim 5

wherein the receiver further comprises at least one digital signal processor comprising at least one crosstalk canceller.

9. The transceiver of

claim 5

wherein the receiver further comprises at least one digital signal processor comprising at least one trellis decoder.

10. The transceiver of

claim 5

wherein the receiver further comprises at least one digital signal processor comprising at least one symbol by symbol decoder.

11. The transceiver of

claim 5

wherein the receiver further comprises at least one digital signal processor comprising at least one decision feedback equalizer.

12. The transceiver of

claim 5

wherein the receiver further comprises at least one digital signal processor comprising at least one convolutional code decoder.

13. The transceiver of

claim 5

wherein the receiver further comprises at least one digital signal processor comprising at least one block code decoder.

14. A transceiver comprising:

at least one transmitter comprising;

at least one interleaved digital to analog converter.

15. The transceiver of

claim 14

wherein the transmitter further comprises parallel digital signal processors.

16. The transceiver of

claim 14

wherein the transmitter further comprises at least one digital signal processor comprising at least one transmit equalizer.

17. The transceiver of

claim 16

wherein the at l east one transmit equalizer comprises at least one Tomlinson-Harashima precoder.

18. The transceiver of

claim 16

wherein the at least one transmit equalizer comprises at least one dynamics limited precoder.

19. The transceiver of

claim 14

wherein the transmitter further comprises at least one digital signal processor comprising at least one trellis encoder.

20. The transceiver of

claim 14

wherein the transmitter further comprises at least one digital signal processor comprising at least one convolutional encoder.

21. The transceiver of

claim 14

wherein the transmitter further comprises at least one digital signal processor comprising at least one block encoder.

22. An optical transmission system comprising:

at least one receiver comprising;

at least one electrical-optical interface; and

at least one interleaved analog to digital converter.

23. The optical transmission system of

claim 22

wherein the receiver further comprises parallel digital signal processors.

24. The optical transmission system of

claim 22

wherein the receiver further comprises at least one digital signal processor comprising at least one forward equalizer.

25. The optical transmission system of

claim 22

wherein the receiver further comprises at least one digital signal processor comprising at least one crosstalk canceller.

26. The optical transmission system of

claim 22

wherein the receiver further comprises at least one digital signal processor comprising at least one trellis decoder.

27. The optical transmission system of

claim 22

wherein the receiver further comprises at least one digital signal processor comprising at least one symbol by symbol decoder.

28. The optical transmission system of

claim 22

wherein the receiver further comprises at least one digital signal processor comprising at least one decision feedback equalizer.

29. The optical transmission system of

claim 22

wherein the receiver further comprises at least one digital signal processor comprising at least one convolutional code decoder.

30. The optical transmission system of

claim 22

wherein the receiver further comprises at least one digital signal processor comprising at least one block code decoder.

31. A optical transmission system comprising:

at least one transmitter comprising;

at least one electrical-optical interface; and

at least one interleaved digital to analog converter.

32. The optical transmission system of

claim 31

wherein the transmitter further comprises parallel digital signal processors.

33. The optical transmission system of

claim 31

wherein the transmitter further comprises at least one digital signal processor comprising at least one transmit equalizer.

34. The optical transmission system of

claim 33

wherein the at least one transmit equalizer comprises at least one Tomlinson-Harashima precoder.

35. The optical transmission system of

claim 33

wherein the at least one transmit equalizer comprises at least one dynamics limited precoder.

36. The optical transmission system of

claim 31

wherein the transmitter further comprises at least one digital signal processor comprising at least one trellis encoder.

37. The optical transmission system of

claim 31

wherein the transmitter further comprises at least one digital signal processor comprising at least one convolutional encoder.

38. The optical transmission system of

claim 31

wherein the transmitter further comprises at least one digital signal processor comprising at least one block encoder.