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1. US20060203931 - M-ary modulation of signals for coherent and differentially coherent receivers

Office United States of America
Application Number 11079362
Application Date 14.03.2005
Publication Number 20060203931
Publication Date 14.09.2006
Grant Number 7388927
Grant Date 17.06.2008
Publication Kind B2
IPC
H04L 27/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
CPC
H04B 1/71635
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
7163using impulse radio
71635Transmitter aspects
H04B 1/71632
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
7163using impulse radio
71632Signal aspects
H04B 1/71637
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
7163using impulse radio
71637Receiver aspects
H04B 1/7176
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
7163using impulse radio
7176Data mapping, e.g. modulation
Applicants Mitsubishi Electric Research Laboratories, Inc.
Inventors Orlik Philip
Molisch Andreas F.
Agents Dirk Brinkman
Mueller Clifton D.
Vinokur Gene V.
Title
(EN) M-ary modulation of signals for coherent and differentially coherent receivers
Abstract
(EN)

A system incorporates time-hopped impulse-radio (TH-IR), transmitted-reference impulse-radio (TR-IR) and noncoherent transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by selecting one coding sequence from a set of orthogonal or quasi-orthogonal coding sequences based on a current subsequence of bits of the input sequence, generating a reference waveform and a data waveform of a waveform pair for each sequence.