The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 2006
Filed:
Apr. 16, 2001
Jeffrey C. Dill, Athens, OH (US);
Sergio R. Lopez-permouth, Athens, OH (US);
Alan Ray Lindsey, Remsen, NY (US);
Yung-cheng Lo, San Leandro, CA (US);
Frank A. Alder, McArthur, OH (US);
Xiangyu Song, Plano, TX (US);
Jeffrey C. Dill, Athens, OH (US);
Sergio R. Lopez-Permouth, Athens, OH (US);
Alan Ray Lindsey, Remsen, NY (US);
Yung-Cheng Lo, San Leandro, CA (US);
Frank A. Alder, McArthur, OH (US);
Xiangyu Song, Plano, TX (US);
The Ohio University, Athens, OH (US);
Abstract
A method of building systematically a multi-dimensional (n, D, L) circular trellis coded modulation (CTCM) encoder with properties of optimal energy efficiency, strong tail biting and maximum minimum distance (d) of trellis paths is disclosed. In addition, a communication system for use in a power limited channel application is disclosed comprising a circular trellis coded modulation (CTCM) encoder with permuted state structure for encoding based on a circular trellis path associated with a sequence of digital information bits and a set of simplexes identified for the path from a multi-dimensional signal constellation; a transmitter coupled to said CTCM encoder for transmitting said sequence of channel symbols over said channel; a receiver for receiving a transmission from said transmitter including said sequence of channel symbols and any noise induced therein; and a CTCM decoder coupled to said receiver for decoding the received transmission without knowledge of the starting state of the circular trellis path of the CTCM encoder to recover the sequence of information bits. Apparatus and methods of encoding and decoding are also disclosed utilizing a combination of circular trellis-coded modulation with permuted state structure and simplex signal constellation techniques for use in the digital communication system.