Method for wireless information transfer

Transmitter and receiver arrangement for implementing the method of one of the previous claims, comprising

• a transmitter (2 to 8, 16 to 26) for pick-up and transmission of an input signal (s1, g4), containing a first modulator (2 to 6, 16 to 24) for angle modulation of the input signal (s1, g4), as well as
• a receiver (11 to 15, 29 to 37), containing a demodulator (14, 15, 31 to 37) for recovery of the input signal (s1, g4), whereby
• the transmitter contains means for generating a quasi-Dirac pulse sequence and, connected to it on the input side, a low-pass filter, the filter characteristic of which possesses a peak shortly before the critical frequency, and thus transforms the delta-pulse sequence into a series of Sinc-pulses, the shape of which is described by the Sinc-function Sinc(x)=sin(x)/x, and contains further, connected to the output of the low-pass filter, an amplitude modulator, which imprints the Sinc-shaped envelope onto a carrier oscillation, and a dispersion filter connected to the output of the amplitude modulator,
• the first modulator (2 to 6, 16 to 24) generates angle modulated pulses according to a modulation characteristic that determines the time variation of the angle or phase position during the duration of each pulse,
• the first modulator (2 to 6, 16 to 24) contains a control input for the pick-up of the input signal (s1, g4) and for the setting of the modulation characteristic depending on the input signal s1, g4,
• and/or the transmitter (2 to 8, 16 to 26) contains a second modulator (4) for an additional modulation of the angle modulated pulses depending on the input signal (s1, g4),
• the receiver (11 to 15, 29 to 37) contains a dispersion filter (13, 32, 33), in particular a surface acoustic wave filter, with a default group delay response for filtering the pulses, angle modulated on the transmitter side, according to the default modulation characteristic, and
• the group delay response of the dispersion filter (13, 32, 33) is matched, for an increase in amplitude of the output signal (s9, g14), to the modulation characteristic used on the transmitter side in such a way that the signal components of the pulses, angle modulated according to this modulation characteristic, arrive time compressed and with an amplitude enhancement at the output of the dispersion filter, due to the filter's frequency dependent, variable signal delay time.