US 7,779,332 B2Granted

Rotationally invariant non-coherent burst coding

AssigneeAlfred E. Mann Foundation for Scientific Research

InventorsLawrence J. Karr, Phillip B. Hess

Life of this patent

Estimating the term…

Loading patent…

Abstract

An apparatus, system and method can be arranged for coding and/or decoding with a phase invariant coding scheme that is useful for short burst signaling devices. 10-bit data is mapped into a 12-bit data with a non-coherent burst code mapper. A parity generator creates a 12-bit parity data to form a 24-bit extended binary Golay code from the 12-bit data. The values for selected bit fields in the 12-bit data and 12-bit parity data are swapped to generate I and Q data such that sensitivity to changes in rotational phase is removed. I and Q data can be used by a transmitter to transmit a rotationally-invariant signal. On receipt, I and Q signals can be recovered, reverse swapped to generate the parity and data signals, and remapped to recover the transmitted 10-bit data. The receiver can also be arranged to use a soft decoding method for improved signal integrity.

Claims8

Dependent claims

A method for coding a signal transmission using a phase invariant non-coherent burst coding scheme, the method comprising:

mapping a 10-bit data to a 12-bit data, wherein the mapping from 10-bit data space to 12-bit data space is determined by a 24-bit weight 12 template code;
generating a 12-bit parity for the 12-bit data using an extended binary Golay encoder, wherein the extended binary Golay encoder is arranged to provide a doubly even self-dual code;
identifying a first set of bit positions in the 12-bit data from a first portion of the 24-bit weight 12 template code;
identifying a second set of bit positions in the 12-bit parity from a second portion of the 24-bit weight 12 template code;
and
swapping a first set of bit values occupying the first set of bit positions in the 12-bit data with a second set of bit values occupying the second set of bit positions in the 12-bit parity to provide a 24-bit coded signal, wherein a first 12-bit portion of the 24-bit coded signal corresponds to an in-phase portion of the signal transmission, and wherein a second 12-bit portion of the 24-bit coded signal corresponds to a quadrature phase portion of the signal transmission such that the 10-bit data is encoded in the signal transmission as a phase invariant non-coherent burst code.

3 more elements

A method for coding a signal transmission using a phase invariant non-coherent burst coding scheme, the method comprising:

generating a 12-bit data and a 12-bit parity from a 10-bit data, wherein the 12-bit data corresponds to a mapping between a 10-bit data space and a 12-bit data space based on a 24-bit weight 12 template code, and wherein the 12-bit parity corresponds to an extended binary Golay code that is associated with the 12-bit data;
identifying a first set of bit positions in the 12-bit data from a first portion of the 24-bit weight 12 template code;
identifying a second set of bit positions in the 12-bit parity from a second portion of the 24-bit weight 12 template code;
and
swapping a first set of bit values occupying the first set of bit positions in the 12-bit data with a second set of bit values occupying the second set of bit positions in the 12-bit parity to provide a 24-bit coded signal, wherein a first 12-bit portion of the 24-bit coded signal corresponds to an in-phase portion of the signal transmission, and wherein a second 12-bit portion of the 24-bit coded signal corresponds to a quadrature phase portion of the signal transmission such that the 10-bit data is encoded in the signal transmission as a phase invariant non-coherent burst code.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/526,461Filed 25 Sep 2006
Published: US 2008/0075176 A127 Mar 2008
Granted: 17 Aug 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04J 13/00
Code division multiplex systems
H03M 13/1505
Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem…:…
H03M 13/251
Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded…: with…
H04L 1/0042
Arrangements at the transmitter end: encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit…