Method and system for adaptive interleaving

• US 7,716,557 B2
• Filed: 06/18/2008
• Issued: 05/11/2010
• Est. Priority Date: 04/17/1998
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Starr, Thomas J J
• Primary Examiner(s): Torres; Joseph D
• Application Number:
  US12/141,400
• Publication Number:
  US 20090031178A1
• Time in Patent Office: 692 Days
• Field of Search: 714/774, 714/701, 714/708
• US Class Current: 714/774
• 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 hardware implemented method in a controller for an adaptive interleaver comprising steps to:

determine the bit error rate of the transmission channel;

determine the data rate of the transmission channel;

determine whether the data rate exceeds a threshold;

analyze a bit error rate of a transmission channel;

analyze a data rate of the transmission channel; and

generate a interleave control signal based on the analysis of the bit error rate and the data rate of the transmission channel wherein the signal controls an interleave depth.

2. The hardware implemented method of claim 1, wherein the control signal is an analog signal.

3. The hardware implemented method of claim 1, wherein the control signal is a digital signal.

4. A computer implemented method implemented for controlling an adaptive interleaver comprising steps of:

determining the bit error rate of the transmission channel;

determining the data rate of the transmission channel;

determining whether the data rate exceeds a threshold;

analyzing a bit error rate of a transmission channel;

analyzing a data rate of the transmission channel; and

generating a interleave control signal based on the analysis of the bit error rate and the data rate of the transmission channel wherein the signal controls an interleave depth.

5. A method for controlling an adaptive interleaver comprising steps of:

determining the bit error rate of the transmission channel;

determining the data rate of the transmission channel;

determining whether the data rate exceeds a threshold;

analyzing a bit error rate of a transmission channel;

analyzing a data rate of the transmission channel; and

generating a interleave control signal based on the analysis of the bit error rate and the data rate of the transmission channel wherein the signal controls an interleave depth.