Decoding a combined amplitude modulated and frequency modulated signal.

Jesper Bevensee Jensen (Inventor), Bo Pedersen (Inventor), Roberto Rodes Lopez (Inventor)

Research output: Patent

93 Downloads (Pure)

Abstract

The present disclosure relates to a method for decoding a combined AM/FM encoded signal, comprising the steps of: combining said encoded optical signal with light from a local oscillator configured with a local oscillator frequency; converting the combined local oscillator and encoded optical signal into one or more electrical signals by means of at least one opto-electrical converter having a predefined frequency bandwidth, thereby providing an amplified and encoded electrical signal having one or more encoded signal current(s), where one type of states have a higher oscillation frequency than other type of states; rectifying the encoded signal current(s), thereby obtaining an encoded power spectrum, wherein said power spectrum has different states, such as "0"-states and "1"-states, with different power levels such that they can be discriminated, said local oscillator frequency is defined by a positive local oscillator frequency-offset from the frequency of one of the states in said encoded optical signal, and said local oscillator frequency-offset is selected to be dependent on said frequency bandwidth.

Original languageEnglish
IPCH04B 10/ 61 A I
Patent numberWO2015118118
CountryInternational Bureau of the World Intellectual Property Organization (WIPO)
Priority date07/02/2014
Priority numberEP20140154237
Publication statusPublished - 13 Aug 2015

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