Method for wireless information transfer
First Claim
1. Method for wireless transfer of information, in particular for mobile communications, wherein an input signal is subjected to an angle modulation in a transmitter (2 to 8;
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16 to 26) and reaches a receiver (11 to 15;
29 to 57) through a transmission channel, whereby angle modulated pulses, possessing a frequency spectrum and carrying information, are generated in the transmitter in such a way, that they can be time compressed in the receiver using a filter (13, 32, 33) with frequency dependent, differential delay time, also referred to as group delay, in such a way that pulses are created with shortened duration and increased amplitude, compared to the emitted pulses, and at least a portion of the information in the transmitter is imprinted onto the pulses using an additional modulation, independent of the angle modulation, and/or is used for controlling a parameter of the angle modulation that can be measured in the receiver, whereby at first a sequence of quasi-Dirac pulses is generated in the transmitter and fed to a low-pass filter, the filter characteristic of which possesses a peak shortly before the critical frequency, and which 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, which is subsequently carried to an amplitude modulator that imprints the Sinc-shaped envelope onto each pulse of a carrier oscillation, and the signal generated in this manner is fed to a dispersive filter, at the output of which arrives a frequency modulated pulse sequence.
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Accused Products
Abstract
Method for wireless information transfer, in particular for mobile communications, in which an input signal (s1, g4) is subjected to a modulation in a transmitter (2 to 8) and reaches a receiver (11 to 15) through a transmission channel, whereby angle modulated pulses, carrying information and possessing a frequency spectrum, are generated in the transmitter in such a way that they can be time compressed in a receiver by means of a filter (13) with frequency dependent, differential delay time, also known as group delay, in such a way, that pulses arise with shortened duration and increased amplitude compared to the emitted pulses, and at least a portion of the information is imprinted onto the pulses using an additional modulation, independent of the angle modulation, and/or is used for controlling a parameter of the angle modulation that can then be registered in the receiver.
18 Citations
19 Claims
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1. Method for wireless transfer of information, in particular for mobile communications, wherein an input signal is subjected to an angle modulation in a transmitter (2 to 8;
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16 to 26) and reaches a receiver (11 to 15;
29 to 57) through a transmission channel, wherebyangle modulated pulses, possessing a frequency spectrum and carrying information, are generated in the transmitter in such a way, that they can be time compressed in the receiver using a filter (13, 32, 33) with frequency dependent, differential delay time, also referred to as group delay, in such a way that pulses are created with shortened duration and increased amplitude, compared to the emitted pulses, and at least a portion of the information in the transmitter is imprinted onto the pulses using an additional modulation, independent of the angle modulation, and/or is used for controlling a parameter of the angle modulation that can be measured in the receiver, whereby at first a sequence of quasi-Dirac pulses is generated in the transmitter and fed to a low-pass filter, the filter characteristic of which possesses a peak shortly before the critical frequency, and which 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, which is subsequently carried to an amplitude modulator that imprints the Sinc-shaped envelope onto each pulse of a carrier oscillation, and the signal generated in this manner is fed to a dispersive filter, at the output of which arrives a frequency modulated pulse sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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16 to 26) and reaches a receiver (11 to 15;
Specification