Method of estimating transmit symbol vectors in an overloaded communication channel

US12107706B2 · kind B2 · utility

Assignee

• CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

• David Gonzalez Gonzalez · Egelsbach, DE
• Andreas Andrae · Frankfurt am Main, DE
• Osvaldo Gonsa · Langen, DE
• Hiroki Iimori · Yokohama, JP
• Giuseppe Thadeu Freitas de Abreu · Bremen, DE

Key dates

• Filing date: Oct 29, 2019
• Grant date: Oct 1, 2024
• Expiry date: Oct 29, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L25/06
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A computer-implemented method of estimating transmit symbol vectors transmitted in an overloaded communication channel includes receiving a signal represented by a received signal vector, the received signal vector corresponding to a superposition of signals representing transmitted symbols selected from a constellation of symbols and transmitted from one or more transmitters. Continuous first and second functions in a search space in a convex domain are defined. The first function and the second function are combined into a third function, and a fractional programming algorithm is applied to the third function, targeted to finding an input vector that minimizes the third function. A mapping rule translates the found input vector into an estimated transmit symbol vector, and the estimated transmit symbol vector is output to a decoder for decoding into an estimated transmit symbol from the constellation.