Method for decoding biphase signals

Details Method for decoding biphase signals Method for decoding biphase signals

2006-08-22

2006-08-22

Corrielus, Jean B. (Department: 2637)

Pulse or digital communications

Receivers

Angle modulation

C375S331000, C375S333000, C714S758000, C714S760000

Reexamination Certificate

active

07095807

ABSTRACT:
A technique of decoding erroneous biphase signals is disclosed comprising the following steps. First, phase and magnitude sample values (ps, bs) are formed, from which a first digital signal (d1) is derived. From this, associated bit combinations (St1,St2;Stp) are determined, and a decision is made as to whether the respective bit combination (St1,St2;Stp) is a valid combination (Sg1,Sg2;Sgp) or an erroneous one (Sf1,Sf2;Sfp). Probability values (Sw1,Sw2;Swp) are determined that decide which parts of the erroneous bit combination (Sf1,Sf2;Sfp) are probably true and/or which are probably false. Next, a corrected bit combination (Sk1,Sk2;Skp) is formed from the existing information. Finally, a second digital signal (d2) is generated as an output signal, whose data states are formed either from the valid bit combination (Sg1,Sg2;Sgp) or from the corrected bit combination (Sk1,Sk2;Skp).

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