Method and system for adaptive interleaving

• US 6,272,652 B1
• Filed: 01/13/2000
• Issued: 08/07/2001
• Est. Priority Date: 04/17/1998
• Status: Expired due to Term

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: Ameritech Corp. (AT&T, Inc.)
• Inventors: Starr, Thomas J J
• Primary Examiner(s): TU, CHRISTINE TRINH LE
• Application Number:
  US09/482,431
• Time in Patent Office: 572 Days
• Field of Search: 714/705, 714/704, 714/701, 714/708, 714/700, 714/814, 711/157, 711/154, 711/127
• US Class Current: 714/701
• CPC Class Codes: G06F 21/56 Computer malware detection or handling, e.g. anti-virus arrangements
• CPC Class Codes: H03M 13/2789 Interleaver providing variable interleaving, e.g. variable block sizes
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H03M 13/353 Adaptation to the channel
• CPC Class Codes: H03M 13/6508 Flexibility, adaptability, parametrability and configurability of the implementation
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0015 characterised by the adaptation strategy
• CPC Class Codes: H04L 1/0021 in which the algorithm uses adaptive thresholds
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04L 1/20 using signal quality detector

Abstract

A method a system for automatically controlling an adaptive interleaver involves monitoring performance parameters of a transmission system and controlling the adaptive interleaver in response to the performance parameters. The SNR and the data rate of the transmission system are preferably determined. The data rate is analyzed and the adaptive interleaver is adjusted in response to the data rate and the SNR. Alternatively, the BER and the data rate of the transmission system are determined. The data rate is analyzed and the adaptive interleaver is adjusted in response to the data rate and the BER. Alternatively, any one of the SNR, BER or data rate can alone be monitored and used to the adaptive interleaver. The system provides a effective system for adjusting an adaptive interleaver in response to performance parameters of a transmission system.

Claims

1. A controller for an adaptive interleaver comprising:

a first performance parameter input for receiving a first input signal;

a second performance parameter input for receiving a second input signal; and

means for providing a control signal in response to the first and second input signals;

wherein the first and second input signals are selected from the group consisting of a signal to noise ratio signal, a bit error rate signal, and a data rate signal.

2. The controller of claim 1, wherein the means for providing a control signal in response to the first and second input signals comprises computer readable program code.

3. The controller of claim 1, wherein the means for providing a control signal in response to the first and second input signals comprises hardware.

4. The controller of claim 1, further comprising means for analyzing the first and second input signals.

5. The controller of claim 1, further comprising an adaptive interleaver coupled with the controller, the adaptive interleaver operative to receive the control signal.

6. A controller for an adaptive interleaver comprising:

a performance parameter input for receiving a performance parameter signal,

wherein the performance parameter signal is selected from the group consisting of a signal to noise ratio signal, a bit error rate signal, and a data rate signal, and

wherein the controller is operative to generate a control signal in response to the performance parameter signal.

7. The controller of claim 6, further comprising means for analyzing the performance parameter signal.

8. The controller of claim 6, further comprising an adaptive interleaver coupled with the controller, the adaptive interleaver operative to receive the control signal.

9. A method for controlling an adaptive interleaver comprising:

(a) receiving a first performance parameter signal;

(b) receiving a second performance parameter signal; and

(c) providing a control signal in response to the first and second performance parameter signals;

wherein the first and second performance parameter signals are selected from the group consisting of a signal to noise ratio signal, a bit error rate signal, and a data rate signal.

10. The method of claim 9, further comprising analyzing the first performance parameter signal.

11. The method of claim 10, wherein the act of analyzing the first performance parameter signal comprises determining whether the first performance parameter signal exceeds a predetermined threshold.

12. The method of claim 9, further comprising analyzing the second performance parameter signal.

13. The method of claim 12, wherein the act of analyzing the second performance parameter signal comprises determining whether the second performance parameter signal exceeds a predetermined threshold.

14. A method for controlling an adaptive interleaver comprising:

(a) receiving a performance parameter signal;

(b) providing a control signal in response to the performance parameter signal; and

(c) transmitting the control signal to an adaptive interleaver;

wherein the performance parameter signal is selected from the group consisting of a signal to noise ratio signal, a bit error rate signal, and a data rate signal.

15. The method of claim 14, further comprising analyzing the performance parameter signal.

16. The method of claim 15, wherein the act of analyzing the performance parameter signal comprises determining whether the performance parameter signal exceeds a predetermined threshold.

17. A controller for an adaptive interleaver comprising:

means for receiving a first input signal;

means for receiving a second input signal; and

means for providing a control signal in response to the first and second input signals;

wherein the first and second input signals are selected from the group consisting of a signal to noise ratio signal, a bit error rate signal, and a data rate signal.

18. The controller of claim 17, wherein the means for providing a control signal in response to the first and second input signals comprises computer readable program code.

19. The controller of claim 17, wherein the means for providing a control signal in response to the first and second input signals comprises hardware.

20. The controller of claim 17, further comprising means for analyzing the first and second input signals.