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Bit error rate of binary and quaternary DPSK signals with multiple differential feedback detection

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1 Author(s)
Edbauer, F. ; German Aerosp. Res. Establ., Oberpfaffenhofen, Germany

A differentially coherent detection scheme with improved bit error rate (BER) performance is presented for differentially encoded binary and quaternary phase shift keying (PSK) modulation. The improvement is based on using L symbol detectors with delays of 1, 2, . . ., L symbol periods and on feeding back detected PSK symbols. Exact formulas for the bit error probability are derived for the case that correct symbols are fed back. The effect of symbol errors in the feedback path on the BER is determined by computer simulations

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Communications, IEEE Transactions on  (Volume:40 ,  Issue: 3 )