FREQUENCY STAGGERED FREQUENCY DEVIATION MODULATION

Title:

FREQUENCY STAGGERED FREQUENCY DEVIATION MODULATION

Document Type and Number:

Japanese Patent JP2005304029

Kind Code:

A

Abstract:

To provide a frequency modulation method with which a digital message composed of a series of symbols can be made corresponding to a set of frequency bands.

Each symbol of a digital message is assigned just one symbol value out of a defined set of symbol values. According to the present frequency modulation method, at least two symbol transmission channels are defined with each symbol transmission channel being formed by a sub-set of frequency bands selected from the set of frequency bands and with each frequency band of the symbol transmission channel being allocated to a symbol value of the set of symbol values in a one-to-one relation, such that symbol transmission channels defined differ from each other in at least one frequency band selected and/or in an allocation of a frequency band to a symbol value. Further, each of the defined transmission channels is successively modulated with a single symbol value of the digital message according to the channel allocation scheme of the respective symbol transmission channel.

More Like This:

JP3434044

MODULATION CIRCUIT

Inventors:

JUERGENSEN JENS-UWE
STIRLING-GALLACHER RICHARD

Application Number:

JP2005111295A

Publication Date:

October 27, 2005

Filing Date:

April 07, 2005

Export Citation:

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Assignee:

SONY INT EUROPE GMBH

International Classes:

H03C3/00; H04B1/69; H04B1/713; H04L27/10; H04L27/12; H04L27/148; H04L27/152; H04L27/18; H04L27/32; (IPC1-7): H04B1/713; H03C3/00; H04L27/10

Domestic Patent References:

JPH10107696A

1998-04-24

Attorney, Agent or Firm:

Akira Koike
Eiichi Tamura
Seiji Iga

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