FREQUENCY STAGGERED FREQUENCY DEVIATION MODULATION

摘要

PROBLEM TO BE SOLVED: 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. SOLUTION: 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. COPYRIGHT: (C)2006,JPO&NCIPI