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Reduction of error floor of differential PSK in mobile radio channels by adaptive sampling

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2 Author(s)
A. F. Molisch ; Inst. fur Nachrichtentech. und Hochfrequenztech., Tech. Univ. Wien, Austria ; E. Bonek

We investigate the error floor of both differential BPSK and differential π/4-QPSK with adaptive sampling in two-delay fading channels where the excess delay is smaller than a bit length. For “basic” DBPSK (i.e., using rectangular pulseshape), the error floor can be eliminated completely, but has finite values for pulses with raised-cosine spectrum. For a/4 DQPSK, the error floor is reduced by only a factor on the order of two as compared to fixed sampling

Published in:

IEEE Transactions on Vehicular Technology  (Volume:47 ,  Issue: 4 )