Patent ID: 7457370
Filing Date: 2008-11-25
Classification: H04B,H04L

Abstract:
1. A frequency modulation method for imprinting a digital message formed by a sequence of symbols on a set of frequency bands, whereby each symbol is assigned one symbol value out of a defined set of symbol values, the method comprising: defining at least two symbol transmission channels, each symbol transmission channel being formed by a sub-set of frequency bands selected from the set of frequency bands and each frequency band of a symbol transmission channel being allocated to a symbol value of the set of symbol values in a one-to-one relation, such that the symbol transmission channels differ from each other in at least one frequency band of the sub-set of frequency bands and/or in an allocation of a frequency band to a symbol value; and modulating each of the defined symbol transmission channels successively with a single symbol value of the digital message according to the allocation defined for the frequency bands of the respective symbol transmission channel, wherein modulation of a defined symbol transmission channel with a single symbol value is effected by up-converting a baseband shaped pulse signal to the frequency band of a respective symbol transmission channel which is allocated to a respective single symbol value.