A method for transmission of digital data utilizes a carrier frequency offset in a first frequency direction for a first binary condition, and offset in a second frequency direction for the remaining binary condition, at the start of a bit time interval. The carrier frequency is swept in a preselected...http://www.google.fr/patents/US4468792?utm_source=gb-gplus-shareBrevet US4468792 - Method and apparatus for data transmission using chirped frequency-shift-keying modulation
Method and apparatus for data transmission using chirped frequency-shift ...
