Method, system, apparatus, and phone for error control of golay encoded data signals

• US 6,199,189 B1
• Filed: 06/30/1998
• Issued: 03/06/2001
• Est. Priority Date: 06/30/1998
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Classon, Brian Keith
• Primary Examiner(s): DeCady, Albert
• Assistant Examiner(s): Chase, Shelly A
• Application Number:
  US09/109,349
• Time in Patent Office: 980 Days
• Field of Search: 714/783, 714/780, 714/758, 714/796, 714/781, 714/752
• US Class Current: 714/783
• CPC Class Codes: H03M 13/09 Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
• CPC Class Codes: H03M 13/15 Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes H03M13/17 takes precedence

Abstract

The present invention provides a method (400), error control system (200), phone (209) and error control apparatus (208) including a hexacode-based Golay decoder (210) adapted to receive values defining Golay encoded data signals and to generate a estimate of original input data signals (216) and a plurality of metrics associated with Golay encoded data signals, and an error detection circuit (212) coupled to the hexacode-based Golay decoder (210) for comparing the plurality of metrics and providing an error detection flag (214).

Claims

1. A method of error detection of soft valued Golay encoded data signals, comprising the steps of:

generating a plurality of even metrics and a plurality of odd metrics associated with Golay encoded data signals using a hexacode-based Golay decoder;

comparing the plurality of metrics and producing a soft metirc;

measuring the soft metric against a predetermined soft threshold level; and

providing an error detection flag.

2. The method of claim 1, wherein the comparing step includes the steps of:

determining a difference between a largest even metric and a largest odd metric.

3. The method of claim 1, wherein the comparing step includes the step of:

determining whether a predetermined number of the even metrics are equal to a largest even metric.

4. The method of claim 1, wherein the comparing step includes the step of:

determining whether a predetermined number of the odd metrics are equal to a largest odd metric.

5. The method of claim 1, wherein the comparing step includes the steps of:

determining a difference between a first largest metric and a second largest metric.

6. The method of claim 1, wherein the error detection flag is soft valued.

7. An error control apparatus for providing error detection and an estimate of input data signals received by a hexacode-based multi-level Golay encoder, wherein the hexacode-based multi-level Golay encoder generates soft valued Golay encoded data signals, comprising:

a hexacode-based Golay decoder adapted to receive values defining the Golay encoded data signals and to generate an estimate of the input data signals and a plurality of even metrics and a plurality of odd metrics associated with the Golay encoded data signals; and

an error detection circuit coupled to the hexacode-based Golay decoder for comparing the plurality of metrics and producing a soft metric, measuring against a predetermined soft threshold level, and providing an error detection flag.

8. The error control apparatus of claim 7, wherein the error detection flag is soft valued.

9. An error control system, comprising:

a hexacode-based multi-level Golay encoder adapted to receive input data signals and generate soft valued Golay encoded data signals,

a receiver adapted to receive the Golay encoded data signals and to generate values defining the Golay encoded data signals;

a hexacode-based Golay decoder adapted to receive the values defining the Golay encoded data signals and to generate an estimate of the input data signals and a plurality of even metrics and a plurality of odd metrics associated with the Golay encoded data signals; and

an error detection circuit coupled to the hexacode-based Golay decoder for comparing the plurality of metrics thereby producing a soft metric, measuring against a predetermined soft threshold level, and providing an error detection flag.

10. The error control system of claim 9, wherein the error detection flag is soft valued.

11. The error control system of claim 9, wherein the receiver comprises a demodulator.

12. A phone for providing error detection and an estimate of input data signals received by a hexacode-based multi-level Golay encoder, wherein the hexacode-based multi-level Golay encoder generates soft valued Golay encoded data signals, comprising:

a receiver adapted to receive the Golay encoded data signals and to generate values defining the Golay encoded data signals;

a hexacode-based Golay decoder adapted to receive the values defining the Golay encoded data signals and to generate an estimate of the input data signals and a plurality of even metrics and a plurality of odd metrics associated with the Golay encoded data signals; and

an error detection circuit coupled to the hexacode-based Golay decoder for comparing the plurality of metrics thereby producing a soft metric, measuring against a predetermined soft threshold level, and providing an error detection flag.

13. The error control apparatus of claim 12, wherein the error detection flag is soft valued.