Apparatus and method and decoding biphase signals

A method of decoding a biphase signal, comprising:

• forming phase sample values and magnitude sample values from the biphase signal;
• deriving a first digital signal from the phase sample values;
• forming at least one bit combination from the first digital signal;
• deciding whether the at least one bit combination is an erroneous bit combination;
• if the bit combination is an erroneous bit combination, performing a probability check to obtain probability values that decide which part of the erroneous bit combination is true and which part of the erroneous bit combination is false, and generating a corrected bit combination from the obtained probability values for the false part of the erroneous bit combination;
• and
• forming a second digital signal whose data states are formed from the valid bit combination and, in the presence of an erroneous bit combination, from the corrected bit combination.

A method of decoding a biphase signal, comprising:

• sampling the biphase signal to obtain phase sample values therefrom;
• sampling the biphase signal to obtain magnitude sample values therefrom;
• deriving a first digital signal from the phase sample values;
• forming associated bit combinations from the first digital signal;
• deciding whether the bit combination is an erroneous bit combination;
• performing a probability check to obtain probability values that decide which parts of the erroneous bit combination are true and which are false;
• generating a corrected bit combination from the obtained probability values;
• and
• forming a second digital signal whose data states are formed from the valid bit combination and, in the presence of an erroneous bit combination, from the corrected bit combination.

A system for decoding a biphase signal, comprising:

• means for sampling the biphase signal to obtain phase sample values therefrom;
• means for sampling the biphase signal to obtain magnitude sample values therefrom;
• means for deriving a first digital signal from the phase sample values;
• means for forming associated bit combinations from the first digital signal;
• means for deciding whether the bit combination is an erroneous bit combination;
• means for performing a probability check to obtain probability values that decide which parts of the erroneous bit combination are true and which are false;
• means for generating a corrected bit combination from the obtained probability values;
• and
• means for forming a second digital signal whose data states are formed from the valid bit combination and, in the presence of an erroneous bit combination, from the corrected bit combination.